LM4674A
www.ti.com
SNAS366A –SEPTEMBER 2006–REVISED MAY 2013
LM4674A Filterless 2.5W Stereo Class D Audio Power
Amplifier
Check for Samples: LM4674A
1FEATURES DESCRIPTION
The LM4674A is a single supply, high efficiency,
2• Output Short Circuit Protection 2.5W/channel, filterless switching audio amplifier. A
• Stereo Class D Operation low noise PWM architecture eliminates the output
• No Output Filter Required filter, reducing external component count, board area
consumption, system cost, and simplifying design.
• Logic Selectable Gain
• Independent Shutdown Control The LM4674A is designed to meet the demands of
mobile phones and other portable communication
• Minimum External Components devices. Operating from a single 5V supply, the
• Click and Pop Suppression device is capable of delivering 2.5W/channel of
• Micro-Power Shutdown continuous output power to a 4Ωload with less than
10% THD+N. Flexible power supply requirements
• Available in Space-Saving 2mm x 2mm x allow operation from 2.4V to 5.5V.
0.6mm DSBGA Package The LM4674A features high efficiency compared to
APPLICATIONS conventional Class AB amplifiers. When driving an
8Ωspeaker from a 3.6V supply, the device features
• Mobile Phones 85% efficiency at PO= 500mW. Four gain options are
• PDAs pin selectable through the GAIN0 and GAIN1 pins.
• Laptops Output short circuit protection prevents the device
from being damaged during fault conditions. Superior
KEY SPECIFICATIONS click and pop suppression eliminates audible
transients on power-up/down and during shutdown.
• Efficiency at 3.6V, 100mW into 8Ω80% (typ) Independent left/right shutdown controls maximizes
• Efficiency at 3.6V, 500mW into 8Ω85% (typ) power savings in mixed mono/stereo applications.
• Efficiency at 5V, 1W into 8Ω85% (typ)
• Quiescent Power Supply Current at 3.6V
Supply 4mA
• Power Output at VDD = 5V, RL= 4Ω, THD ≤10%
2.5W (typ)
• Power Output at VDD = 5V, RL= 8Ω, THD ≤10%
1.5W (typ)
• Shutdown Current 0.1μA (typ)
1Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
2All trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date. Copyright © 2006–2013, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
4
3
2
1
AB C D
INL+
OUTLA
PVDD
OUTLB
INL-
G1
/SDR
/SDL
INR-
G0
GND
PGND
INR+
VDD
OUTRA
OUTRB
LM4674A
/SDR
/SDL
GAIN0
GAIN1
INR+
INL+
INR-
INL-
OUTRA
OUTRB
OUTLA
OUTLB
VDD
PVDD
GND PGND
2.4V to 5.5V
SHUTDOWN
CONTROL
GAIN
CONTROL
LM4674A
SNAS366A –SEPTEMBER 2006–REVISED MAY 2013
www.ti.com
Typical Application
Figure 1. Typical Audio Amplifier Application Circuit
Connection Diagram
Figure 2. DSBGA - Top View
See YZR0016 Package
2Submit Documentation Feedback Copyright © 2006–2013, Texas Instruments Incorporated
Product Folder Links: LM4674A
LM4674A
www.ti.com
SNAS366A –SEPTEMBER 2006–REVISED MAY 2013
These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam
during storage or handling to prevent electrostatic damage to the MOS gates.
Absolute Maximum Ratings(1)(2)(3)
Supply Voltage(1) 6.0V
Storage Temperature −65°C to +150°C
Input Voltage –0.3V to VDD +0.3V
Power Dissipation(4) Internally Limited
ESD Susceptibility, all other pins(5) 2000V
ESD Susceptibility(6) 200V
Junction Temperature (TJMAX) 150°C
Thermal Resistance θJA 45.7°C/W
(1) All voltages are measured with respect to the ground pin, unless otherwise specified.
(2) Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for
which the device is functional, but do not ensure specific performance limits. Electrical Characteristics state DC and AC electrical
specifications under particular test conditions which ensure specific performance limits. This assumes that the device is within the
Operating Ratings. Specifications are not ensured for parameters where no limit is given, however, the typical value is a good indication
of device performance.
(3) If Military/Aerospace specified devices are required, please contact the TI Sales Office/ Distributors for availability and specifications.
(4) The maximum power dissipation must be derated at elevated temperatures and is dictated by TJMAX,θJA, and the ambient temperature,
TA. The maximum allowable power dissipation is PDMAX = (TJMAX – TA)/ θJA or the number given in Absolute Maximum Ratings,
whichever is lower. For the LM4674A see power derating currents for more information.
(5) Human body model, 100pF discharged through a 1.5kΩresistor.
(6) Machine Model, 220pF–240pF discharged through all pins.
Operating Ratings(1)(2)
Temperature Range TMIN ≤TA≤TMAX −40°C ≤TA≤85°C
Supply Voltage 2.4V ≤VDD ≤5.5V
(1) All voltages are measured with respect to the ground pin, unless otherwise specified.
(2) Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for
which the device is functional, but do not ensure specific performance limits. Electrical Characteristics state DC and AC electrical
specifications under particular test conditions which ensure specific performance limits. This assumes that the device is within the
Operating Ratings. Specifications are not ensured for parameters where no limit is given, however, the typical value is a good indication
of device performance.
Copyright © 2006–2013, Texas Instruments Incorporated Submit Documentation Feedback 3
Product Folder Links: LM4674A
LM4674A
SNAS366A –SEPTEMBER 2006–REVISED MAY 2013
www.ti.com
Electrical Characteristics VDD = 3.6V(1)(2)
The following specifications apply for AV= 6dB, RL= 15µH + 8Ω+ 15µH, f = 1kHz unless otherwise specified. Limits apply for
TA= 25°C. LM4674A Units
Symbol Parameter Conditions (Limits)
Typical(3) Limit(4)
VOS Differential Output Offset Voltage VIN = 0, VDD = 2.4V to 5.0 V 5 mV
VIN = 0, RL=∞, mA
4 6
Both channels active, VDD = 3.6V
IDD Quiescent Power Supply Current VIN = 0, RL=∞, mA
5 7.5
Both channels active, VDD = 5V
ISD Shutdown Current VSD1 = VSD2 = GND 0.03 1 μA
VSDIH Shutdown Voltage Input High 1.4 V (min)
VSDIL Shutdown Voltage Input Low 0.4 V (max)
TWU Wake Up Time VSHUTDOWN = 0.4V 4.2 ms
GAIN0, GAIN1 = GND 6 6 ± 0.5 dB
GAIN0 = VDD, GAIN1 = GND 12 12 ± 0.5 dB
AVGain GAIN0 = GND, GAIN1 = VDD 18 18 ± 0.5 dB
GAIN0, GAIN1 = VDD 24 24 ± 0.5 dB
AV= 6dB 28 kΩ
AV= 12dB 18.75 kΩ
RIN Input Resistance AV= 18dB 11.25 kΩ
AV= 24dB 6.25 kΩ
RL= 15μH + 4Ω+ 15μH, THD = 10%
f = 1kHz, 22kHz BW
VDD = 5V 2.5 W
VDD = 3.6V 1.2 W
VDD = 2.5V 0.530 W
RL= 15μH + 8Ω+ 15μH, THD = 10%
f = 1kHz, 22kHz BW
VDD = 5V 1.5 W
VDD = 3.6V 0.78 0.6 W
VDD = 2.5V 0.350 W
POOutput Power RL= 15μH + 4Ω+ 15μH, THD = 1%
f = 1kHz, 22kHz BW
VDD = 5V 1.9 W
VDD = 3.6V 1 W
VDD = 2.5V 0.430 W
RL= 15μH + 8Ω+ 15μH, THD = 1%
f = 1kHz, 22kHz BW
VDD = 5V 1.25 W
VDD = 3.6V 0.63 W
VDD = 2.5V 0.285 W
PO= 500mW, f = 1kHz, RL = 8Ω0.07 %
THD+N Total Harmonic Distortion PO= 300mW, f = 1kHz, RL = 8Ω0.05 %
(1) All voltages are measured with respect to the ground pin, unless otherwise specified.
(2) Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for
which the device is functional, but do not ensure specific performance limits. Electrical Characteristics state DC and AC electrical
specifications under particular test conditions which ensure specific performance limits. This assumes that the device is within the
Operating Ratings. Specifications are not ensured for parameters where no limit is given, however, the typical value is a good indication
of device performance.
(3) Typicals are measured at 25°C and represent the parametric norm.
(4) Limits are specified to TI's AOQL (Average Outgoing Quality Level).
4Submit Documentation Feedback Copyright © 2006–2013, Texas Instruments Incorporated
Product Folder Links: LM4674A
LM4674A
www.ti.com
SNAS366A –SEPTEMBER 2006–REVISED MAY 2013
Electrical Characteristics VDD = 3.6V(1)(2) (continued)
The following specifications apply for AV= 6dB, RL= 15µH + 8Ω+ 15µH, f = 1kHz unless otherwise specified. Limits apply for
TA= 25°C. LM4674A Units
Symbol Parameter Conditions (Limits)
Typical(3) Limit(4)
VRIPPLE = 200mVP-P Sine,
fRipple = 217Hz, Inputs AC GND, 75 dB
CI= 1μF, input referred
PSRR Power Supply Rejection Ratio VRIPPLE = 1VP-P Sine,
fRipple = 1kHz, Inputs AC GND, 75 dB
CI= 1μF, input referred
VRIPPLE = 1VP-P
CMRR Common Mode Rejection Ratio 67 dB
fRIPPLE = 217Hz
PO= 1W, f = 1kHz,
ηEfficiency 85 %
RL= 8Ω, VDD = 5V
Crosstalk PO= 500mW, f = 1kHz 84 dB
SNR Signal to Noise Ratio VDD = 5V, PO= 1W 96 dB
εOS Output Noise Input referred, A-Weighted Filter 20 μV
External Components Description
(Figure 1)
Components Functional Description
1. CSSupply bypass capacitor which provides power supply filtering. Refer to the Power Supply Bypassing section for
information concerning proper placement and selection of the supply bypass capacitor.
2. CIInput AC coupling capacitor which blocks the DC voltage at the amplifier's input terminals.
Copyright © 2006–2013, Texas Instruments Incorporated Submit Documentation Feedback 5
Product Folder Links: LM4674A
PWM MODULATOR H-BRIDGE
OSCILLATOR
BIAS CLICK/POP
SUPPRESSION
PWM MODULATOR H-BRIDGE
GAIN
CONTROL
VDD
PVDD
INL+
INL-
G0
G1
INR+
INR-
GNDPGND /SDR /SDL
OUTLA
OUTLB
OUTRA
OUTRB
/SDR
/SDL
GAIN0
GAIN1
INR+
INL+
INR-
INL-
OUTRA
OUTRB
OUTLA
OUTLB
VDD PVDD
GND PGND
2.4V to 5.5V
H-BRIDGE
GAIN/
MODULATOR
H-BRIDGE
GAIN/
MODULATOR
OSCILLATOR
1 PF
1 PF
1 PF
1 PF
1 PF0.1 PF
LM4674A
SNAS366A –SEPTEMBER 2006–REVISED MAY 2013
www.ti.com
Block Diagrams
Figure 3. Differential Input Configuration
6Submit Documentation Feedback Copyright © 2006–2013, Texas Instruments Incorporated
Product Folder Links: LM4674A
10 100 1000 10000 100000
FREQUENCY (W)
THD+N (%)
100
0.01
0.1
1
10
0.001
10 100 1000 10000 100000
FREQUENCY (W)
THD+N (%)
100
0.01
0.1
1
10
0.001
0.001 0.01 0.1 1 10
OUTPUT POWER (W)
THD+N (%)
VDD = 5V
VDD = 3.6V
VDD = 2.5V
0.01
0.1
1
10
100
0.001 0.01 0.1 1 10
OUTPUT POWER (W)
THD+N (%)
VDD = 5V
VDD = 3.6V
VDD = 2.5V
0.01
0.1
1
10
100
0.001 0.01 0.1 1 10
OUTPUT POWER (W)
THD+N (%)
VDD = 5V
VDD = 3.6V
VDD = 2.5V
0.01
0.1
1
10
100
0.001 0.01 0.1 1 10
OUTPUT POWER (W)
THD+N (%)
VDD = 5V
VDD = 3.6V
VDD = 2.5V
0.01
0.1
1
10
100
LM4674A
www.ti.com
SNAS366A –SEPTEMBER 2006–REVISED MAY 2013
Typical Performance Characteristics
THD+N vs Output Power THD+N vs Output Power
f = 1kHz, AV= 24dB, RL= 8Ωf = 1kHz, AV= 6dB, RL= 8Ω
Figure 4. Figure 5.
THD+N vs Output Power THD+N vs Output Power
f= 1kHz, AV= 24dB, RL= 4Ωf = 1kHz, AV= 6dB, RL= 4Ω
Figure 6. Figure 7.
THD+N vs Frequency THD+N vs Frequency
VDD = 2.5V, POUT = 100mW, RL= 8ΩVDD = 3.6V, POUT = 250mW, RL= 8Ω
Figure 8. Figure 9.
Copyright © 2006–2013, Texas Instruments Incorporated Submit Documentation Feedback 7
Product Folder Links: LM4674A
0 500 1000 1500 2000
OUTPUT POWER (mW)
EFFICIENCY (%)
0
10
20
30
40
50
60
70
80
90
100
VDD
= 2.5V
VDD = 3.6V
VDD = 5V
00 200 400 600 800 1000 1200
OUTPUT POWER (mW)
EFFICIENCY (%)
VDD
= 2.5V
VDD = 3.6V
VDD = 5V
10
20
30
40
50
60
70
80
90
100
10 100 1000 10000 100000
FREQUENCY (W)
THD+N (%)
100
0.01
0.1
1
10
0.001
10 100 1000 10000 100000
FREQUENCY (W)
THD+N (%)
100
0.01
0.1
1
10
0.001
10 100 1000 10000 100000
FREQUENCY (W)
THD+N (%)
100
0.01
0.1
1
10
0.001
10 100 1000 10000 100000
FREQUENCY (W)
THD+N (%)
100
0.01
0.1
1
10
0.001
LM4674A
SNAS366A –SEPTEMBER 2006–REVISED MAY 2013
www.ti.com
Typical Performance Characteristics (continued)
THD+N vs Frequency THD+N vs Frequency
VDD = 5V, POUT = 375mW, RL= 8ΩVDD = 2. 5V, POUT = 100mW, RL= 4Ω
Figure 10. Figure 11.
THD+N vs Frequency THD+N vs Frequency
VDD = 3.6V, POUT = 250mW, RL= 4ΩVDD = 5V, POUT = 375mW, RL= 4Ω
Figure 12. Figure 13.
Efficiency vs. Output Power Efficiency vs. Output Power
RL= 4Ω, f = 1kHz RL= 8Ω, f = 1kHz
Figure 14. Figure 15.
8Submit Documentation Feedback Copyright © 2006–2013, Texas Instruments Incorporated
Product Folder Links: LM4674A
10 100 1000 10000 100000
FREQUENCY (Hz)
CROSSTALK (dB)
-100
-90
-80
-70
-60
-50
-40
-30
-20
-10
0
2.5 3 3.5 4 4.5 5 5.5
SUPPLY VOLTAGE (V)
OUTPUT POWER (mW)
0
500
1000
1500
2000
THD+N = 1%
THD+N = 10%
2500
3000
2.5 3 3.5 4 4.5 5 5.5
SUPPLY VOLTAGE (V)
OUTPUT POWER (mW)
0
500
1000
1500
2000
THD+N = 1%
THD+N = 10%
VDD = 2.5V
0 1000 2000 3000 4000
OUTPUT POWER (mW)
POWER DISSIPATION (mW)
0
250
500
750
1000
VDD = 3.6V
VDD = 5V
POUT = POUTL + POUTR
0 500 1000 1500 2000 2500
OUTPUT POWER (mW)
POWER DISSIPATION (mW)
VDD = 5V
VDD = 3.6V
VDD = 2.5V
POUT = POUTL + POUTR
0
100
200
300
400
LM4674A
www.ti.com
SNAS366A –SEPTEMBER 2006–REVISED MAY 2013
Typical Performance Characteristics (continued)
Power Dissipation vs. Output Power Power Dissipation vs. Output Power
RL= 4Ω, f = 1kHz RL= 8Ω, f = 1kHz
Figure 16. Figure 17.
Output Power vs. Supply Voltage Output Power vs. Supply Voltage
RL= 4Ω, f = 1kHz RL= 8Ω, f = 1kHz
Figure 18. Figure 19.
PSRR vs. Frequency Crosstalk vs. Frequency
VDD = 3.6V, VRIPPLE= 200mVP-P, RL= 8ΩVDD = 3.6V, VRIPPLE = 1VP-P, RL= 8Ω
Figure 20. Figure 21.
Copyright © 2006–2013, Texas Instruments Incorporated Submit Documentation Feedback 9
Product Folder Links: LM4674A
LM4674A
SNAS366A –SEPTEMBER 2006–REVISED MAY 2013
www.ti.com
Typical Performance Characteristics (continued)
CMRR vs. Frequency Supply Current vs. Supply Voltage
VDD = 3.6V, VCM = 1VP-P, RL= 8ΩNo Load
Figure 22. Figure 23.
10 Submit Documentation Feedback Copyright © 2006–2013, Texas Instruments Incorporated
Product Folder Links: LM4674A
LM4674A
www.ti.com
SNAS366A –SEPTEMBER 2006–REVISED MAY 2013
APPLICATION INFORMATION
GENERAL AMPLIFIER FUNCTION
The LM4674A stereo Class D audio power amplifier features a filterless modulation scheme that reduces
external component count, conserving board space and reducing system cost. The outputs of the device
transition from VDD to GND with a 300kHz switching frequency. With no signal applied, the outputs (OUT_A and
OUT_B) switch with a 50% duty cycle, in phase, causing the two outputs to cancel. This cancellation results in no
net voltage across the speaker, thus there is no current to the load in the idle state.
With the input signal applied, the duty cycle (pulse width) of the LM4674A outputs changes. For increasing output
voltage, the duty cycle of OUT_A increases, while the duty cycle of OUT_B decreases. For decreasing output
voltages, the converse occurs. The difference between the two pulse widths yields the differential output voltage.
DIFFERENTIAL AMPLIFIER EXPLANATION
As logic supplies continue to shrink, system designers are increasingly turning to differential analog signal
handling to preserve signal to noise ratios with restricted voltage signs. The LM4674A features two fully
differential amplifiers. A differential amplifier amplifies the difference between the two input signals. Traditional
audio power amplifiers have typically offered only single-ended inputs resulting in a 6dB reduction of SNR
relative to differential inputs. The LM4674A also offers the possibility of DC input coupling which eliminates the
input coupling capacitors. A major benefit of the fully differential amplifier is the improved common mode
rejection ratio (CMRR) over single ended input amplifiers. The increased CMRR of the differential amplifier
reduces sensitivity to ground offset related noise injection, especially important in noisy systems.
POWER DISSIPATION AND EFFICIENCY
The major benefit of a Class D amplifier is increased efficiency versus a Class AB. The efficiency of the
LM4674A is attributed to the region of operation of the transistors in the output stage. The Class D output stage
acts as current steering switches, consuming negligible amounts of power compared to their Class AB
counterparts. Most of the power loss associated with the output stage is due to the IR loss of the MOSFET on-
resistance, along with switching losses due to gate charge.
SHUTDOWN FUNCTION
The LM4674A features independent left and right channel shutdown controls, allowing each channel to be
disabled independently. /SDR controls the right channel, while /SDL controls the left channel. Driving either low
disables the corresponding channel, reducing supply current to 0.03µA.
It is best to switch between ground and VDD for minimum current consumption while in shutdown. The LM4674A
may be disabled with shutdown voltages in between GND and VDD, the idle current will be greater than the
typical 0.03µA value. Increased THD+N may also be observed when a voltage of less than VDD is applied to
/SD_ for logic levels between GND and VDD Bypass /SD_ with a 0.1μF capacitor.
The LM4674A shutdown inputs have internal pulldown resistors. The purpose of these resistors is to eliminate
any unwanted state changes when /SD_ is floating. To minimize shutdown current, /SD_ should be driven to
GND or left floating. If /SD_ is not driven to GND or floating, an increase in shutdown supply current will be
noticed.
SINGLE-ENDED AUDIO AMPLIFIER CONFIGURATION
The LM4674A is compatible with single-ended sources. When configured for single-ended inputs, input
capacitors must be used to block and DC component at the input of the device. Figure 25 shows the typical
single-ended applications circuit.
AUDIO AMPLIFIER POWER SUPPLY BYPASSING/FILTERING
Proper power supply bypassing is critical for low noise performance and high PSRR. Place the supply bypass
capacitor as close to the device as possible. Typical applications employ a voltage regulator with 10µF and 0.1µF
bypass capacitors that increase supply stability. These capacitors do not eliminate the need for bypassing of the
LM4674A supply pins. A 1µF capacitor is recommended.
Copyright © 2006–2013, Texas Instruments Incorporated Submit Documentation Feedback 11
Product Folder Links: LM4674A
LM4674A
SNAS366A –SEPTEMBER 2006–REVISED MAY 2013
www.ti.com
AUDIO AMPLIFIER INPUT CAPACITOR SELECTION
Input capacitors may be required for some applications, or when the audio source is single-ended. Input
capacitors block the DC component of the audio signal, eliminating any conflict between the DC component of
the audio source and the bias voltage of the LM4674A. The input capacitors create a high-pass filter with the
input resistors RI. The -3dB point of the high pass filter is found using Equation 1 below.
f = 1 / 2πRINCIN (1)
The values for RI can be found in the EC table for each gain setting.
The input capacitors can also be used to remove low frequency content from the audio signal. Small speakers
cannot reproduce, and may even be damaged by low frequencies. High pass filtering the audio signal helps
protect the speakers. When the LM4674A is using a single-ended source, power supply noise on the ground is
seen as an input signal. Setting the high-pass filter point above the power supply noise frequencies, 217Hz in a
GSM phone, for example, filters out the noise such that it is not amplified and heard on the output. Capacitors
with a tolerance of 10% or better are recommended for impedance matching and improved CMRR and PSRR.
AUDIO AMPLIFIER GAIN SETTING
The LM4674A features four internally configured gain settings. The device gain is selected through the two logic
inputs, G0 and G1. The gain settings are as shown in the following table.
G1 G0 GAIN
V/V dB
0026
0 1 4 12
1 0 8 18
1 1 16 24
PCB LAYOUT GUIDELINES
As output power increases, interconnect resistance (PCB traces and wires) between the amplifier, load and
power supply create a voltage drop. The voltage loss due to the traces between the LM4674A and the load
results in lower output power and decreased efficiency. Higher trace resistance between the supply and the
LM4674A has the same effect as a poorly regulated supply, increasing ripple on the supply line, and reducing
peak output power. The effects of residual trace resistance increases as output current increases due to higher
output power, decreased load impedance or both. To maintain the highest output voltage swing and
corresponding peak output power, the PCB traces that connect the output pins to the load and the supply pins to
the power supply should be as wide as possible to minimize trace resistance.
The use of power and ground planes will give the best THD+N performance. In addition to reducing trace
resistance, the use of power planes creates parasitic capacitors that help to filter the power supply line.
The inductive nature of the transducer load can also result in overshoot on one of both edges, clamped by the
parasitic diodes to GND and VDD in each case. From an EMI standpoint, this is an aggressive waveform that
can radiate or conduct to other components in the system and cause interference. In is essential to keep the
power and output traces short and well shielded if possible. Use of ground planes beads and micros-strip layout
techniques are all useful in preventing unwanted interference.
As the distance from the LM4674A and the speaker increases, the amount of EMI radiation increases due to the
output wires or traces acting as antennas become more efficient with length. Ferrite chip inductors places close
to the LM4674A outputs may be needed to reduce EMI radiation.
12 Submit Documentation Feedback Copyright © 2006–2013, Texas Instruments Incorporated
Product Folder Links: LM4674A
PWM MODULATOR H-BRIDGE
OSCILLATOR
BIAS CLICK/POP
SUPPRESSION
PWM MODULATOR H-BRIDGE
GAIN
CONTROL
VDD
PVDD
INL+
INL-
G0
G1
INR+
INR-
GNDPGND /SDR /SDL
OUTLA
OUTLB
OUTRA
OUTRB
PWM MODULATOR H-BRIDGE
OSCILLATOR
BIAS CLICK/POP
SUPPRESSION
PWM MODULATOR H-BRIDGE
GAIN
CONTROL
VDD
PVDD
INL+
INL-
G0
G1
INR+
INR-
GNDPGND /SDR /SDL
OUTLA
OUTLB
OUTRA
OUTRB
LM4674A
www.ti.com
SNAS366A –SEPTEMBER 2006–REVISED MAY 2013
Figure 24. Differential Input Configuration
Figure 25. Single-Ended Input Configuration
Copyright © 2006–2013, Texas Instruments Incorporated Submit Documentation Feedback 13
Product Folder Links: LM4674A
LM4674A
SNAS366A –SEPTEMBER 2006–REVISED MAY 2013
www.ti.com
REVISION HISTORY
Rev Date Description
1.0 9/13/06 Initial WEB release.
Changes from Original (May 2013) to Revision A Page
• Changed layout of National Data Sheet to TI format .......................................................................................................... 13
14 Submit Documentation Feedback Copyright © 2006–2013, Texas Instruments Incorporated
Product Folder Links: LM4674A
PACKAGE OPTION ADDENDUM
www.ti.com 2-May-2013
Addendum-Page 1
PACKAGING INFORMATION
Orderable Device Status
(1)
Package Type Package
Drawing Pins Package
Qty Eco Plan
(2)
Lead/Ball Finish MSL Peak Temp
(3)
Op Temp (°C) Top-Side Markings
(4)
Samples
LM4674ATL/NOPB ACTIVE DSBGA YZR 16 250 Green (RoHS
& no Sb/Br) SNAGCU Level-1-260C-UNLIM -40 to 85 GI2
LM4674ATLX/NOPB ACTIVE DSBGA YZR 16 3000 Green (RoHS
& no Sb/Br) SNAGCU Level-1-260C-UNLIM -40 to 85 GI2
(1) The marketing status values are defined as follows:
ACTIVE: Product device recommended for new designs.
LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect.
NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design.
PREVIEW: Device has been announced but is not in production. Samples may or may not be available.
OBSOLETE: TI has discontinued the production of the device.
(2) Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS), Pb-Free (RoHS Exempt), or Green (RoHS & no Sb/Br) - please check http://www.ti.com/productcontent for the latest availability
information and additional product content details.
TBD: The Pb-Free/Green conversion plan has not been defined.
Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements for all 6 substances, including the requirement that
lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes.
Pb-Free (RoHS Exempt): This component has a RoHS exemption for either 1) lead-based flip-chip solder bumps used between the die and package, or 2) lead-based die adhesive used between
the die and leadframe. The component is otherwise considered Pb-Free (RoHS compatible) as defined above.
Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame retardants (Br or Sb do not exceed 0.1% by weight
in homogeneous material)
(3) MSL, Peak Temp. -- The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature.
(4) Multiple Top-Side Markings will be inside parentheses. Only one Top-Side Marking contained in parentheses and separated by a "~" will appear on a device. If a line is indented then it is a
continuation of the previous line and the two combined represent the entire Top-Side Marking for that device.
Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided. TI bases its knowledge and belief on information
provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties. TI has taken and
continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals.
TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited information may not be available for release.
In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI to Customer on an annual basis.
TAPE AND REEL INFORMATION
*All dimensions are nominal
Device Package
Type Package
Drawing Pins SPQ Reel
Diameter
(mm)
Reel
Width
W1 (mm)
A0
(mm) B0
(mm) K0
(mm) P1
(mm) W
(mm) Pin1
Quadrant
LM4674ATL/NOPB DSBGA YZR 16 250 178.0 8.4 2.08 2.08 0.76 4.0 8.0 Q1
LM4674ATLX/NOPB DSBGA YZR 16 3000 178.0 8.4 2.08 2.08 0.76 4.0 8.0 Q1
PACKAGE MATERIALS INFORMATION
www.ti.com 8-May-2013
Pack Materials-Page 1
*All dimensions are nominal
Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm)
LM4674ATL/NOPB DSBGA YZR 16 250 210.0 185.0 35.0
LM4674ATLX/NOPB DSBGA YZR 16 3000 210.0 185.0 35.0
PACKAGE MATERIALS INFORMATION
www.ti.com 8-May-2013
Pack Materials-Page 2
MECHANICAL DATA
YZR0016xxx
www.ti.com
TLA16XXX (Rev C)
0.600±0.075 D
E
A
. All linear dimensions are in millimeters. Dimensioning and tolerancing per ASME Y14.5M-1994.
B. This drawing is subject to change without notice.
NOTES:
4215051/A 12/12
D: Max =
E: Max =
1.99 mm, Min =
1.99 mm, Min =
1.93 mm
1.93 mm
IMPORTANT NOTICE
Texas Instruments Incorporated (TI) reserves the right to make corrections, enhancements, improvements and other changes to its
semiconductor products and services per JESD46, latest issue, and to discontinue any product or service per JESD48, latest issue. Buyers
should obtain the latest relevant information before placing orders and should verify that such information is current and complete.
TI’s published terms of sale for semiconductor products (http://www.ti.com/sc/docs/stdterms.htm) apply to the sale of packaged integrated
circuit products that TI has qualified and released to market. Additional terms may apply to the use or sale of other types of TI products and
services.
Reproduction of significant portions of TI information in TI data sheets is permissible only if reproduction is without alteration and is
accompanied by all associated warranties, conditions, limitations, and notices. TI is not responsible or liable for such reproduced
documentation. Information of third parties may be subject to additional restrictions. Resale of TI products or services with statements
different from or beyond the parameters stated by TI for that product or service voids all express and any implied warranties for the
associated TI product or service and is an unfair and deceptive business practice. TI is not responsible or liable for any such statements.
Buyers and others who are developing systems that incorporate TI products (collectively, “Designers”) understand and agree that Designers
remain responsible for using their independent analysis, evaluation and judgment in designing their applications and that Designers have
full and exclusive responsibility to assure the safety of Designers' applications and compliance of their applications (and of all TI products
used in or for Designers’ applications) with all applicable regulations, laws and other applicable requirements. Designer represents that, with
respect to their applications, Designer has all the necessary expertise to create and implement safeguards that (1) anticipate dangerous
consequences of failures, (2) monitor failures and their consequences, and (3) lessen the likelihood of failures that might cause harm and
take appropriate actions. Designer agrees that prior to using or distributing any applications that include TI products, Designer will
thoroughly test such applications and the functionality of such TI products as used in such applications.
TI’s provision of technical, application or other design advice, quality characterization, reliability data or other services or information,
including, but not limited to, reference designs and materials relating to evaluation modules, (collectively, “TI Resources”) are intended to
assist designers who are developing applications that incorporate TI products; by downloading, accessing or using TI Resources in any
way, Designer (individually or, if Designer is acting on behalf of a company, Designer’s company) agrees to use any particular TI Resource
solely for this purpose and subject to the terms of this Notice.
TI’s provision of TI Resources does not expand or otherwise alter TI’s applicable published warranties or warranty disclaimers for TI
products, and no additional obligations or liabilities arise from TI providing such TI Resources. TI reserves the right to make corrections,
enhancements, improvements and other changes to its TI Resources. TI has not conducted any testing other than that specifically
described in the published documentation for a particular TI Resource.
Designer is authorized to use, copy and modify any individual TI Resource only in connection with the development of applications that
include the TI product(s) identified in such TI Resource. NO OTHER LICENSE, EXPRESS OR IMPLIED, BY ESTOPPEL OR OTHERWISE
TO ANY OTHER TI INTELLECTUAL PROPERTY RIGHT, AND NO LICENSE TO ANY TECHNOLOGY OR INTELLECTUAL PROPERTY
RIGHT OF TI OR ANY THIRD PARTY IS GRANTED HEREIN, including but not limited to any patent right, copyright, mask work right, or
other intellectual property right relating to any combination, machine, or process in which TI products or services are used. Information
regarding or referencing third-party products or services does not constitute a license to use such products or services, or a warranty or
endorsement thereof. Use of TI Resources may require a license from a third party under the patents or other intellectual property of the
third party, or a license from TI under the patents or other intellectual property of TI.
TI RESOURCES ARE PROVIDED “AS IS” AND WITH ALL FAULTS. TI DISCLAIMS ALL OTHER WARRANTIES OR
REPRESENTATIONS, EXPRESS OR IMPLIED, REGARDING RESOURCES OR USE THEREOF, INCLUDING BUT NOT LIMITED TO
ACCURACY OR COMPLETENESS, TITLE, ANY EPIDEMIC FAILURE WARRANTY AND ANY IMPLIED WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, AND NON-INFRINGEMENT OF ANY THIRD PARTY INTELLECTUAL
PROPERTY RIGHTS. TI SHALL NOT BE LIABLE FOR AND SHALL NOT DEFEND OR INDEMNIFY DESIGNER AGAINST ANY CLAIM,
INCLUDING BUT NOT LIMITED TO ANY INFRINGEMENT CLAIM THAT RELATES TO OR IS BASED ON ANY COMBINATION OF
PRODUCTS EVEN IF DESCRIBED IN TI RESOURCES OR OTHERWISE. IN NO EVENT SHALL TI BE LIABLE FOR ANY ACTUAL,
DIRECT, SPECIAL, COLLATERAL, INDIRECT, PUNITIVE, INCIDENTAL, CONSEQUENTIAL OR EXEMPLARY DAMAGES IN
CONNECTION WITH OR ARISING OUT OF TI RESOURCES OR USE THEREOF, AND REGARDLESS OF WHETHER TI HAS BEEN
ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
Unless TI has explicitly designated an individual product as meeting the requirements of a particular industry standard (e.g., ISO/TS 16949
and ISO 26262), TI is not responsible for any failure to meet such industry standard requirements.
Where TI specifically promotes products as facilitating functional safety or as compliant with industry functional safety standards, such
products are intended to help enable customers to design and create their own applications that meet applicable functional safety standards
and requirements. Using products in an application does not by itself establish any safety features in the application. Designers must
ensure compliance with safety-related requirements and standards applicable to their applications. Designer may not use any TI products in
life-critical medical equipment unless authorized officers of the parties have executed a special contract specifically governing such use.
Life-critical medical equipment is medical equipment where failure of such equipment would cause serious bodily injury or death (e.g., life
support, pacemakers, defibrillators, heart pumps, neurostimulators, and implantables). Such equipment includes, without limitation, all
medical devices identified by the U.S. Food and Drug Administration as Class III devices and equivalent classifications outside the U.S.
TI may expressly designate certain products as completing a particular qualification (e.g., Q100, Military Grade, or Enhanced Product).
Designers agree that it has the necessary expertise to select the product with the appropriate qualification designation for their applications
and that proper product selection is at Designers’ own risk. Designers are solely responsible for compliance with all legal and regulatory
requirements in connection with such selection.
Designer will fully indemnify TI and its representatives against any damages, costs, losses, and/or liabilities arising out of Designer’s non-
compliance with the terms and provisions of this Notice.
Mailing Address: Texas Instruments, Post Office Box 655303, Dallas, Texas 75265
Copyright © 2017, Texas Instruments Incorporated
Mouser Electronics
Authorized Distributor
Click to View Pricing, Inventory, Delivery & Lifecycle Information:
Texas Instruments:
LM4674ATLBD/NOPB LM4674ATL/NOPB LM4674ATLBD LM4674ATLX/NOPB