LTC2050/LTC2050HV
1
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TYPICAL APPLICATION
FEATURES
APPLICATIONS
DESCRIPTION
Zero-Drift
Operational Amplifi ers
in SOT-23
The LTC
®
2050 and LTC2050HV are zero-drift operational
amplifi ers available in the 5- or 6-lead SOT-23 and SO-8
packages. The LTC2050 operates from a single 2.7V to
6V supply. The LTC2050HV operates on supplies from
2.7V to ±5.5V. The current consumption is 800μA and the
versions in the 6-lead SOT-23 and SO-8 packages offer
power shutdown (active low).
The LTC2050, despite its miniature size, features uncom-
promising DC performance. The typical input offset voltage
and offset drift are 0.5μV and 10nV/°C. The almost zero
DC offset and drift are supported with a power supply
rejection ratio (PSRR) and common mode rejection ratio
(CMRR) of more than 130dB.
The input common mode voltage ranges from the nega-
tive supply up to typically 1V from the positive supply.
The LTC2050 also has an enhanced output stage capable
of driving loads as low as 2kΩ to both supply rails. The
open-loop gain is typically 140dB. The LTC2050 also
features a 1.5μVP-P DC to 10Hz noise and a 3MHz gain
bandwidth product.
n Maximum Offset Voltage of 3μV
n Maximum Offset Voltage Drift of 30nV/°C
n Noise: 1.5μVP-P (0.01Hz to 10Hz Typ)
n Voltage Gain: 140dB (Typ)
n PSRR: 130dB (Typ)
n CMRR: 130dB (Typ)
n Supply Current: 0.8mA (Typ)
n Supply Operation: 2.7V to 6V (LTC2050)
2.7V to ±5.5V (LTC2050HV)
n Extended Common Mode Input Range
n Output Swings Rail-to-Rail
n Input Overload Recovery Time: 2ms (Typ)
n Operating Temperature Range: –40°C to 125°C
n Low Profl e (1mm) SOT-23 (ThinSOT)™ Package
n Thermocouple Amplifi ers
n Electronic Scales
n Medical Instrumentation
n Strain Gauge Amplifi ers
n High Resolution Data Acquisition
n DC Accurate RC Active Filters
n Low Side Current Sense
Input Referred Noise 0.1Hz to 10HzDifferential Bridge Amplifi er
–
+
5V
0.1μF 18.2k
0.1μF
18.2k
5
1
2
3
4
0.1μF
5V
AV = 100
2050 TA01
350Ω
STRAIN
GAUGE
50Ω
GAIN
TRIM
LTC2050HV
–5V
2
1
0
–1
–2
(μV)
2406810
TIME (SEC)
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear
Technology Corporation. ThinSOT is a trademark of Linear Technology Corporation. All other
trademarks are the property of their respective owners. Protected by U.S. Patents, including
5481178.
LTC2050/LTC2050HV
2
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OUT 1
V– 2
TOP VIEW
S5 PACKAGE
5-LEAD PLASTIC TSOT-23
+IN 3
5 V+
4 –IN
TJMAX = 125°C, θJA = 250°C/W
OUT 1
V– 2
+IN 3
6 V+
5SHD
N
4 –IN
TOP VIEW
S6 PACKAGE
6-LEAD PLASTIC TSOT-23
TJMAX = 125°C, θJA = 230°C/W
1
2
3
4
8
7
6
5
TOP VIEW
NC
V+
OUT
NC
SHDN
–IN
+IN
V–
S8 PACKAGE
8-LEAD PLASTIC SO
TJMAX = 125°C, θJA = 190°C/W
ABSOLUTE MAXIMUM RATINGS
Total Supply Voltage (V+ to V–)
LTC2050 ..................................................................7V
LTC2050HV ...........................................................12V
Input Voltage ........................ (V+ + 0.3V) to (V– – 0.3V)
Output Short-Circuit Duration ......................... Indefi nite
(Note 1)
Operating Temperature Range................–40°C to 125°C
Specifi ed Temperature Range
(Note 3) ..................................................–40°C to 125°C
Storage Temperature Range ...................–65°C to 150°C
Lead Temperature (Soldering, 10 sec) .................. 300°C
PIN CONFIGURATION
ORDER INFORMATION
LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION SPECIFIED TEMPERATURE RANGE
LTC2050CS5#PBF LTC2050CS5#TRPBF LTAEG 5-Lead Plastic TSOT-23 0°C to 70°C
LTC2050IS5#PBF LTC2050IS5#TRPBF LTAEG 5-Lead Plastic TSOT-23 –40°C to 85°C
LTC2050HS5#PBF LTC2050HS5#TRPBF LTAEG 5-Lead Plastic TSOT-23 –40°C to 125°C
LTC2050HVCS5#PBF LTC2050HVCS5#TRPBF LTAEH 5-Lead Plastic TSOT-23 0°C to 70°C
LTC2050HVIS5#PBF LTC2050HVIS5#TRPBF LTAEH 5-Lead Plastic TSOT-23 –40°C to 85°C
LTC2050HVHS5#PBF LTC2050HVHS5#TRPBF LTAEH 5-Lead Plastic TSOT-23 –40°C to 125°C
LTC2050CS6#PBF LTC2050CS6#TRPBF LTAEJ 6-Lead Plastic TSOT-23 0°C to 70°C
LTC2050IS6#PBF LTC2050IS6#TRPBF LTAEJ 6-Lead Plastic TSOT-23 –40°C to 85°C
LTC2050HS6#PBF LTC2050HS6#TRPBF LTAEJ 6-Lead Plastic TSOT-23 –40°C to 125°C
LTC2050HVCS6#PBF LTC2050HVCS6#TRPBF LTAEK 6-Lead Plastic TSOT-23 0°C to 70°C
LTC2050HVIS6#PBF LTC2050HVIS6#TRPBF LTAEK 6-Lead Plastic TSOT-23 –40°C to 85°C
LTC2050HVHS6#PBF LTC2050HVHS6#TRPBF LTAEK 6-Lead Plastic TSOT-23 –40°C to 125°C
LTC2050CS8#PBF LTC2050CS8#TRPBF 2050 8-Lead Plastic SO 0°C to 70°C
LTC2050IS8#PBF LTC2050IS8#TRPBF 2050I 8-Lead Plastic SO –40°C to 85°C
LTC2050HVCS8#PBF LTC2050HVCS8#TRPBF 2050HV 8-Lead Plastic SO 0°C to 70°C
LTC2050HVIS8#PBF LTC2050HVIS8#TRPBF 050HVI 8-Lead Plastic SO –40°C to 85°C
LTC2050/LTC2050HV
3
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ORDER INFORMATION
LEAD BASED FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION SPECIFIED TEMPERATURE RANGE
LTC2050CS5 LTC2050CS5#TR LTAEG 5-Lead Plastic TSOT-23 0°C to 70°C
LTC2050IS5 LTC2050IS5#TR LTAEG 5-Lead Plastic TSOT-23 –40°C to 85°C
LTC2050HS5 LTC2050HS5#TR LTAEG 5-Lead Plastic TSOT-23 –40°C to 125°C
LTC2050HVCS5 LTC2050HVCS5#TR LTAEH 5-Lead Plastic TSOT-23 0°C to 70°C
LTC2050HVIS5 LTC2050HVIS5#TR LTAEH 5-Lead Plastic TSOT-23 –40°C to 85°C
LTC2050HVHS5 LTC2050HVHS5#TR LTAEH 5-Lead Plastic TSOT-23 –40°C to 125°C
LTC2050CS6 LTC2050CS6#TR LTAEJ 6-Lead Plastic TSOT-23 0°C to 70°C
LTC2050IS6 LTC2050IS6#TR LTAEJ 6-Lead Plastic TSOT-23 –40°C to 85°C
LTC2050HS6 LTC2050HS6#TR LTAEJ 6-Lead Plastic TSOT-23 –40°C to 125°C
LTC2050HVCS6 LTC2050HVCS6#TR LTAEK 6-Lead Plastic TSOT-23 0°C to 70°C
LTC2050HVIS6 LTC2050HVIS6#TR LTAEK 6-Lead Plastic TSOT-23 –40°C to 85°C
LTC2050HVHS6 LTC2050HVHS6#TR LTAEK 6-Lead Plastic TSOT-23 –40°C to 125°C
LTC2050CS8 LTC2050CS8#TR 2050 8-Lead Plastic SO 0°C to 70°C
LTC2050IS8 LTC2050IS8#TR 2050I 8-Lead Plastic SO –40°C to 85°C
LTC2050HVCS8 LTC2050HVCS8#TR 2050HV 8-Lead Plastic SO 0°C to 70°C
LTC2050HVIS8 LTC2050HVIS8#TR 050HVI 8-Lead Plastic SO –40°C to 85°C
Consult LTC Marketing for parts specifi ed with wider operating temperature ranges. *The temperature grade is identifi ed by a label on the shipping container.
For more information on lead free part marking, go to: http://www.linear.com/leadfree/
For more information on tape and reel specifi
cations, go to: http://www.linear.com/tapeandreel/
LTC2050/LTC2050HV
4
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ELECTRICAL CHARACTERISTICS
PARAMETER CONDITIONS
C, I SUFFIXES H SUFFIX
UNITSMIN TYP MAX MIN TYP MAX
Input Offset Voltage (Note 2) ±0.5 ±3 ±0.5 ±3 μV
Average Input Offset Drift (Note 2) l±0.03 ±0.05 μV/°C
Long-Term Offset Drift 50 50 nV/√mo
Input Bias Current LTC2050
l
±20 ±75
±300
±20 ±75
±4000
pA
pA
LTC2050HV
l
±1 ±50
±100
±1 ±50
±4000
pA
pA
Input Offset Current LTC2050
l
±150
±200
±150
±1000
pA
pA
LTC2050HV
l
±100
±150
±100
±1000
pA
pA
Input Noise Voltage RS = 100Ω, 0.01Hz to 10Hz 1.5 1.5 μVP-P
Input Capacitance 1.7 1.7 pF
Common Mode Rejection Ratio VCM = GND to (V+ – 1.3)
VCM = GND to (V+ – 1.3) l
115
110
130
130
115
110
130
130
dB
dB
Power Supply Rejection Ratio VS = 2.7V to 6V
l
120
115
130
130
120
115
130
130
dB
dB
Large-Signal Voltage Gain RL = 10k
l
120
115
140
140
120
115
140
140
dB
dB
Output Voltage Swing High RL = 2k to GND
RL = 10k to GND
l
l
2.85
2.95
2.94
2.98
2.85
2.95
2.94
2.98
V
V
Output Voltage Swing Low RL = 2k to GND
RL = 10k to GND
l
l
1
1
10
10
1
1
10
10
mV
mV
Slew Rate 22V/μs
Gain Bandwidth Product 3 3 MHz
Supply Current VSHDN = VIH, No Load
VSHDN = VIL
l
l
0.75 1.1
10
0.75 1.2
10
mA
μA
Shutdown Pin Input Low Voltage (VIL)lV– + 0.5 V– + 0.5 V
Shutdown Pin Input High Voltage (VIH)lV+ – 0.5 V+ – 0.5 V
Shutdown Pin Input Current VSHDN = GND l–0.5 –3 –0.5 –3 μA
Internal Sampling Frequency 7.5 7.5 kHz
(LTC2050/LTC2050HV) The l denotes the specifi cations which apply over
the full operating temperature range, otherwise specifi cations are at TA = 25°C. VS = 3V unless otherwise noted. (Note 3)
LTC2050/LTC2050HV
5
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PARAMETER CONDITIONS
C, I SUFFIXES H SUFFIX
UNITSMIN TYP MAX MIN TYP MAX
Input Offset Voltage (Note 2) ±0.5 ±3 ±0.5 ±3 μV
Average Input Offset Drift (Note 2) l±0.03 ±0.05 μV/°C
Long-Term Offset Drift 50 50 nV/√mo
Input Bias Current LTC2050
l
±75 ±150
±300
±75 ±150
±4000
pA
pA
LTC2050HV
l
±7 ±50
±150
±7 ±50
±4000
pA
pA
Input Offset Current LTC2050
l
±300
±400
±300
±1000
pA
pA
LTC2050HV
l
±100
±200
±100
±1000
pA
pA
Input Noise Voltage RS = 100Ω, 0.01Hz to 10Hz 1.5 1.5 μVP-P
Common Mode Rejection Ratio VCM = GND to (V+ – 1.3)
VCM = GND to (V+ – 1.3) l
120
115
130
130
120
110
130
130
dB
dB
Power Supply Rejection Ratio VS = 2.7V to 6V
l
120
115
130
130
120
115
130
130
dB
dB
Large-Signal Voltage Gain RL = 10k
l
125
120
140
140
125
115
140
140
dB
dB
Output Voltage Swing High RL = 2k to GND
RL = 10k to GND
l
l
4.85
4.95
4.94
4.98
4.85
4.95
4.94
4.98
V
V
Output Voltage Swing Low RL = 2k to GND
RL = 10k to GND
l
l
1
1
10
10
1
1
10
10
mV
mV
Slew Rate 22V/μs
Gain Bandwidth Product 3 3 MHz
Supply Current VSHDN = VIH, No Load
VSHDN = VIL
l
l
0.8 1.2
15
0.8 1.3
15
mA
μA
Shutdown Pin Input Low Voltage (VIL)lV– + 0.5 V– + 0.5 V
Shutdown Pin Input High Voltage (VIH)lV+ – 0.5 V+ – 0.5 V
Shutdown Pin Input Current VSHDN = GND l–0.5 –7 –0.5 –7 μA
Internal Sampling Frequency 7.5 7.5 kHz
ELECTRICAL CHARACTERISTICS
The l denotes the specifi cations which apply over the full operating
temperature range, otherwise specifi cations are at TA = 25°C. (LTC2050/LTC2050HV) VS = 5V unless otherwise noted. (Note 3)
LTC2050/LTC2050HV
6
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ELECTRICAL CHARACTERISTICS
(LTC2050HV) The l denotes the specifi cations which apply over the full
operating temperature range, otherwise specifi cations are at TA = 25°C. VS = ±5V unless otherwise noted. (Note 3)
PARAMETER CONDITIONS
C, I SUFFIXES H SUFFIX
UNITSMIN TYP MAX MIN TYP MAX
Input Offset Voltage (Note 2) ±0.5 ±3 ±0.5 ±3 μV
Average Input Offset Drift (Note 2) l±0.03 ±0.05 μV/°C
Long-Term Offset Drift 50 50 nV/√mo
Input Bias Current (Note 4)
l
±25 ±125
±300
±25 ±125
±4000
pA
pA
Input Offset Current (Note 4)
l
±250
±500
±250
±1000
pA
pA
Input Noise Voltage RS = 100Ω, 0.01Hz to 10Hz 1.5 1.5 μVP-P
Common Mode Rejection Ratio VCM = V– to (V+ – 1.3)
VCM = V– to (V+ – 1.3) l
120
115
130
130
120
115
130
130
dB
dB
Power Supply Rejection Ratio VS = 2.7V to 11V
l
120
115
130
130
120
115
130
130
dB
dB
Large-Signal Voltage Gain RL = 10k 125
120
140
140
125
120
140
140
dB
dB
Maximum Output Voltage Swing RL = 2k to GND
RL = 10k to GND
l
l
±4.75
±4.90
±4.94
±4.98
±4.50
±4.85
±4.94
±4.98
V
V
Slew Rate 2 2 V/μs
Gain Bandwidth Product 3 3 MHz
Supply Current VSHDN = VIH, No Load
VSHDN = VIL
l
l
1 1.5
25
1 1.6
25
mA
μA
Shutdown Pin Input Low Voltage (VIL)lV– + 0.5 V– + 0.5 V
Shutdown Pin Input High Voltage (VIH)lV+ – 0.5 V+ – 0.5 V
Shutdown Pin Input Current VSHDN = V–l–3 –20 –3 –20 μA
Internal Sampling Frequency 7.5 7.5 kHz
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2: These parameters are guaranteed by design. Thermocouple effects
preclude measurements of these voltage levels during automated testing.
Note 3: All versions of the LTC2050 are designed, characterized and
expected to meet the extended temperature limits of –40°C and 125°C.
The LTC2050C/LTC2050HVC are guaranteed to meet the temperature limits
of 0°C and 70°C. The LTC2050I/LTC2050HVI are guaranteed to meet the
temperature limits of –40°C and 85°C. The LTC2050H/LTC2050HVH are
guaranteed to meet the temperature limits of –40°C and 125°C.
Note 4: The bias current measurement accuracy depends on the proximity
of the supply bypass capacitor to the device under test, especially at ±5V
supplies. Because of testing limitations on the placement of this bypass
capacitor, the bias current at ±5V supplies is guaranteed by design to meet
the data sheet limits, but tested to relaxed limits.
LTC2050/LTC2050HV
7
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TYPICAL PERFORMANCE CHARACTERISTICS
Common Mode Rejection Ratio
vs Frequency
DC CMRR vs Common Mode Input
Voltage PSRR vs Frequency
Output Voltage Swing vs Load
Resistance Output Swing vs Output Current
Output Swing vs Load Resistance
±5V Supply
Output Swing vs Output Current
±5V Supply Gain/Phase vs Frequency Bias Current vs Temperature
FREQUENCY (Hz)
20
CMRR (dB)
40
80
120
140
1 100 1k 100k
2050 G01
010 10k
60
100
VS = 3V OR 5V
VCM = 0.5VP-P
VCM (V)
20
CMRR (dB)
40
80
120
140
1340
2050 G02
025
60
100
VS = 3V VS = 5V
TA = 25°C
FREQUENCY (Hz)
10
PSRR (dB)
120
100
80
60
40
20
0100 1k 10k 100k
2050 G14
1M
–PSRR
+PSRR
OUTPUT CURRENT (mA)
0.01
2
OUTPUT VOLTAGE (V)
3
4
5
0.1 1 10
2050 G04
1
0
6
VS = 5V
VS = 3V
FREQUENCY (Hz)
0
GAIN (dB)
20
40
60
100
100 1k 100k 1M 10M
2050 G05
–20
–40 10k
80
180
PHASE (DEG)
160
140
120
100
200
80
GAIN
PHASE
VS = 3V OR 5V
CL = 35pF
RL = 10kΩ
TEMPERATURE (°C)
–25
10
1
100
10k
1k
10075
2050 G06
–50 125
BIAS CURRENT (pA)
50
025
VS = 3V
VS = 5V
LOAD RESISTANCE (kΩ)
0
OUTPUT SWING (V)
5
4
3
2
1
0
–1
–2
–3
–4
–5 8
2050 G16
24610
RL TO GND
OUTPUT CURRENT (mA)
0.01
OUTPUT SWING (V)
5
4
3
2
1
0
–1
–2
–3
–4
–5
2050 G17
0.1 101.0
RL TO GND
LOAD RESISTANCE (kΩ)
0
OUTPUT SWING (V)
6
5
4
3
2
1
024
2050 G03
6810
RL TO GND
VS= 5V
VS= 3V
LTC2050/LTC2050HV
8
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TYPICAL PERFORMANCE CHARACTERISTICS
Input Bias Current vs Input
Common Mode Voltage
Input Bias Current vs Input
Common Mode Voltage
(LTC2050HV) Transient Response
Input Overload Recovery
Sampling Frequency
vs Supply Voltage
Sampling Frequency
vs Temperature
Supply Current vs Supply Voltage Supply Current vs Temperature
INPUT COMMON MODE VOLTAGE (V)
0
INPUT BIAS CURRENT MAGNITUDE (pA)
35
2050 G13
12 4
160
140
120
100
80
60
40
20
0
VS = 5V
VS = 3V
INPUT COMMON MODE VOLTAGE (V)
INPUT BIAS CURRENT (pA)
60
50
40
30
20
10
0
–10
2050 G15
–5 –3 –1 1 3 5
VS = ±5V
VS = 5V
VS = 3V
SUPPLY VOLTAGE (V)
2.5
5
SAMPLING FREQUENCY (kHz)
6
7
3.53.0 4.54.0 5.0 5.5
2050 G09
8
9
10
6.0
TA = 25°C
TEMPERATURE (°C)
–50
SAMPLING FREQUENCY (kHz)
10
9
8
7
6
5050 75
2050 G10
–25 25 100 125
VS = 5V
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (mA)
24 6810
1.2
1.0
0.8
0.6
0.4
0.2
0
2050 G11
TA = 25°C
TEMPERATURE (°C)
–50
SUPPLY CURRENT (mA)
1.0
0.8
0.6
0.4
0.2
0050 75
2050 G12
–25 25 100 125
VS = 3V
VS = 5V
1μs/DIV
0.5/DIV
2050 G07
AV = 1
RL = 100k
CL = 50pF
VS = 5V
500μs/DIV
INPUT (V)
OUTPUT (V)
–0.2
1.5
0
0
2050 G08
AV = –100
RL = 100k
CL = 10pF
VS = ±1.5V
LTC2050/LTC2050HV
9
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TEST CIRCUITS
Electrical Characteristics Test Circuit
DC-10Hz Noise Test Circuit
–
+
LTC2050 –
+
LT1012
10Ω
1
3
4
2050 TC02
100k 475k
475k316k158k
0.1μF 0.01μF
0.01μF
TO X-Y
RECORDER
FOR 1Hz NOISE BW INCREASE ALL THE CAPACITORS BY A FACTOR OF 10.
–
+
LTC2050
V+
V–
10Ω
1
2
3
45
RL
2050 TC01
100k
OUTPUT
LTC2050/LTC2050HV
10
2050fc
multiplied by the closed loop gain of the op amp. To reduce
this form of clock feedthrough, use smaller valued gain
setting resistors and minimize the source resistance at the
input. If the resistance seen at the inputs is less than 10k,
this form of clock feedthrough is less than 1μVRMS input
referred at 7.5kHz, or less than the amount of residue clock
feedthrough from the fi rst form described above.
Placing a capacitor across the feedback resistor reduces
either form of clock feedthrough by limiting the bandwidth
of the closed loop gain.
Input bias current is defi ned as the DC current into the
input pins of the op amp. The same current spikes that
cause the second form of clock feedthrough described
above, when averaged, dominate the DC input bias current
of the op amp below 70°C.
At temperatures above 70°C, the leakage of the ESD
protection diodes on the inputs increases the input bias
currents of both inputs in the positive direction, while
the current caused by the charge injection stays rela-
tively constant. At elevated temperatures (above 85°C) the
leakage current begins to dominate and both the negative
and positive pin’s input bias currents are in the positive
direction (into the pins).
Input Pins, ESD Sensitivity
ESD voltages above 700V on the input pins of the op amp
will cause the input bias currents to increase (more DC
current into the pins). At these voltages, it is possible to
damage the device to a point where the input bias current
exceeds the maximums specifi ed in this data sheet.
Shutdown
The LTC2050 includes a shutdown pin in the 6-lead SOT-23
and the SO-8 version. When this active low pin is high or
allowed to fl oat, the device operates normally. When the
shutdown pin is pulled low, the device enters shutdown
mode; supply current drops to 3μA, all clocking stops, and
both inputs and output assume a high impedance state.
Clock Feedthrough, Input Bias Current
The LTC2050 uses auto-zeroing circuitry to achieve an
almost zero DC offset over temperature, common mode
voltage, and power supply voltage. The frequency of the
clock used for auto-zeroing is typically 7.5kHz. The term
clock feedthrough is broadly used to indicate visibility of
this clock frequency in the op amp output spectrum. There
are typically two types of clock feedthrough in auto zeroed
op amps like the LTC2050.
The fi rst form of clock feedthrough is caused by the settling
of the internal sampling capacitor and is input referred;
that is, it is multiplied by the closed loop gain of the op
amp. This form of clock feedthrough is independent of the
magnitude of the input source resistance or the magnitude
of the gain setting resistors. The LTC2050 has a residue
clock feedthrough of less then 1μVRMS input referred
at 7.5kHz.
The second form of clock feedthrough is caused by the
small amount of charge injection occurring during the
sampling and holding of the op amp’s input offset voltage.
The current spikes are multiplied by the impedance seen at
the input terminals of the op amp, appearing at the output
APPLICATIONS INFORMATION
LTC2050/LTC2050HV
11
2050fc
Single Supply Thermocouple Amplifi er
Gain of 1001 Single Supply Instrumentation Amplifi er
TYPICAL APPLICATIONS
2050 TA04
+
–
+
–
10k
10Ω
10Ω
10k
V+
V+
45
1
2
3
45
1
2
3
VOUT
–VIN
+VIN
LTC2050
LTC2050
OUTPUT DC OFFSET ≤ 6mV
FOR 0.1% RESISTORS, CMRR = 54dB
0.1μF
–
+
–+
LT1025A
GND
K
R–
5V
0.1μF
LTC2050
5
1
4
5
4
3
2
2
TYPE K
7
VOUT
10mV/°C
1k
1%
255k
1%
100Ω
0.068μF
2050 TA03
LT1025 COMPENSATES COLD JUNCTION
OVER 0°C TO 100°C TEMPERATURE RANGE
5V
LTC2050/LTC2050HV
12
2050fc
High Precision 3-Input Mux
Instrumentation Amplifi er with 100V Common Mode Input Voltage
Low Side Power Supply Current Sensing
–
+
1
3
45SEL1
10k1.1k
IN 1
AV = 10
–
+
1
3
45SEL2
10k
10Ω
IN 2
AV = 1000
–
+
1
3
45SEL3
IN 3
AV = 1
LTC2050
LTC2050
LTC2050
OUT
SELECT INPUTS ARE CMOS LOGIC COMPATIBLE
2050 TA07
SHDN
SHDN
SHDN
–
+
LTC2050HV 1
4
3
2050 TA08
5
2
5V
–5V
TO
MEASURED
CIRCUIT
OUT
3V/AMP
LOAD CURRENT
IN MEASURED
CIRCUIT, REFERRED
TO –5V
10Ω 10k
3mΩ
0.1μF
LOAD CURRENT
–
+
LTC2050HV –
+
LTC2050HV
1M
1M
1
3
4
2050 TA06
1k 1M
1k
1k
VOUT
5
2
1
3
45
2
V+
V–
V+
V–
OUTPUT OFFSET ≤3mV
FOR 0.1% RESISTORS, CMRR = 54dB
+
–
VIN
TYPICAL APPLICATIONS
LTC2050/LTC2050HV
13
2050fc
PACKAGE DESCRIPTION
1.50 – 1.75
(NOTE 4)
2.80 BSC
0.30 – 0.45 TYP
5 PLCS (NOTE 3)
DATUM ‘A’
0.09 – 0.20
(NOTE 3) S5 TSOT-23 0302 REV B
PIN ONE
2.90 BSC
(NOTE 4)
0.95 BSC
1.90 BSC
0.80 – 0.90
1.00 MAX 0.01 – 0.10
0.20 BSC
0.30 – 0.50 REF
NOTE:
1. DIMENSIONS ARE IN MILLIMETERS
2. DRAWING NOT TO SCALE
3. DIMENSIONS ARE INCLUSIVE OF PLATING
4. DIMENSIONS ARE EXCLUSIVE OF MOLD FLASH AND METAL BURR
5. MOLD FLASH SHALL NOT EXCEED 0.254mm
6. JEDEC PACKAGE REFERENCE IS MO-193
3.85 MAX
0.62
MAX
0.95
REF
RECOMMENDED SOLDER PAD LAYOUT
PER IPC CALCULATOR
1.4 MIN
2.62 REF
1.22 REF
S5 Package
5-Lead Plastic TSOT-23
(Reference LTC DWG # 05-08-1635)
LTC2050/LTC2050HV
14
2050fc
1.50 – 1.75
(NOTE 4)
2.80 BSC
0.30 – 0.45
6 PLCS (NOTE 3)
DATUM ‘A’
0.09 – 0.20
(NOTE 3) S6 TSOT-23 0302 REV B
2.90 BSC
(NOTE 4)
0.95 BSC
1.90 BSC
0.80 – 0.90
1.00 MAX 0.01 – 0.10
0.20 BSC
0.30 – 0.50 REF
PIN ONE ID
NOTE:
1. DIMENSIONS ARE IN MILLIMETERS
2. DRAWING NOT TO SCALE
3. DIMENSIONS ARE INCLUSIVE OF PLATING
4. DIMENSIONS ARE EXCLUSIVE OF MOLD FLASH AND METAL BURR
5. MOLD FLASH SHALL NOT EXCEED 0.254mm
6. JEDEC PACKAGE REFERENCE IS MO-193
3.85 MAX
0.62
MAX
0.95
REF
RECOMMENDED SOLDER PAD LAYOUT
PER IPC CALCULATOR
1.4 MIN
2.62 REF
1.22 REF
PACKAGE DESCRIPTION
S6 Package
6-Lead Plastic TSOT-23
(Reference LTC DWG # 05-08-1636)
LTC2050/LTC2050HV
15
2050fc
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no representa-
tion that the interconnection of its circuits as described herein will not infringe on existing patent rights.
PACKAGE DESCRIPTION
S8 Package
8-Lead Plastic Small Outline (Narrow .150 Inch)
(Reference LTC DWG # 05-08-1610)
.016 – .050
(0.406 – 1.270)
.010 – .020
(0.254 – 0.508)s 45°
0°– 8° TYP
.008 – .010
(0.203 – 0.254)
SO8 0303
.053 – .069
(1.346 – 1.752)
.014 – .019
(0.355 – 0.483)
TYP
.004 – .010
(0.101 – 0.254)
.050
(1.270)
BSC
1234
.150 – .157
(3.810 – 3.988)
NOTE 3
8765
.189 – .197
(4.801 – 5.004)
NOTE 3
.228 – .244
(5.791 – 6.197)
.245
MIN .160 ±.005
RECOMMENDED SOLDER PAD LAYOUT
.045 ±.005
.050 BSC
.030 ±.005
TYP
INCHES
(MILLIMETERS)
NOTE:
1. DIMENSIONS IN
2. DRAWING NOT TO SCALE
3. THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS.
MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED .006" (0.15mm)
LTC2050/LTC2050HV
16
2050fc
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900 ● FAX: (408) 434-0507 ● www.linear.com
© LINEAR TECHNOLOGY CORPORATION 1999
LT 0709 REV C • PRINTED IN USA
RELATED PARTS
TYPICAL APPLICATION
–
+
LTC2050
LT1034
+
–
VOUT
V+
10k
1
2
3
45
RSET
0 ≤ IOUT ≤ 4mA
0.2V ≤ VOUT ≤ (V+) – 1.5V
–
+
LTC2050
LT1034
+
–
VOUT
V–
10k
1
2
3
4
5RSET
0 ≤ IOUT ≤ 4mA
(V–) + 1.5V ≤ VOUT ≤ – 1V
2050 TA05
IOUT = ———
RSET
1.235V
IOUT = ———
RSET
1.235V
PART NUMBER DESCRIPTION COMMENTS
LTC1049 Low Power Zero-Drift Op Amp Low Supply Current 200μA
LTC1050 Precision Zero-Drift Op Amp Single Supply Operation 4.75V to 16V, Noise Tested and Guaranteed
LTC1051/LTC1053 Precision Zero-Drift Op Amp Dual/Quad
LTC1150 ±15V Zero-Drift Op Amp High Voltage Operation ±18V
LTC1152 Rail-to-Rail Input and Output Zero-Drift Op Amp Single Zero-Drift Op Amp with Rail-to-Rail Input and Output and Shutdown
LT1677 Low Noise Rail-to-Rail Input and Output
Precision Op Amp
VOS = 90μV, VS = 2.7V to 44V
LT1884/LT1885 Rail-to-Rail Output Precision Op Amp VOS = 50μV, IB = 400pA, VS = 2.7V to 40V
LTC2051 Dual Zero-Drift Op Amp Dual Version of the LTC2050 in MS8 Package
Ground Referred Precision Current Sources
