LTC2050/LTC2050HV
1
Rev. E
For more information www.analog.com
TYPICAL APPLICATION
FEATURES
APPLICATIONS
DESCRIPTION
Zero-Drift Operational Amplifiers in SOT-23
The LTC
®
2050 and LTC2050HV are zero-drift operational
amplifiers 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 LTC2050HVMP
offer operating range from 4.5V to ±5.5V and operating
temperature range of – 55°C to 150°C.
The LTC2050, despite its miniature size, features uncom-
promising DC performance. The typical input offset volt-
age and offset drift are 0.5µV and 10nV/°C. The almost
zero DC offset and drift are supported with a power sup-
ply 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
n LTC2050: 2.7V to 6V
n LTC2050HV: 2.7V to ±5.5V
n LTC2050HVMP: 4.5V to ±5.5V
n Extended Common Mode Input Range
n Output Swings Rail-to-Rail
n Input Overload Recovery Time: 2ms (Typ)
n Operating Temperature Range
n LTC2050: –40°C to 125°C
n LTC2050HVMP: –55°C to 150°C
n Low Profile (1mm) SOT-23 (ThinSOT™) Package
n Thermocouple Amplifiers
n Electronic Scales
n Medical Instrumentation
n Strain Gauge Amplifiers
n High Resolution Data Acquisition
n DC Accurate RC Active Filters
n Low Side Current Sense
Input Referred Noise 0.1Hz to 10HzDifferential Bridge Amplifier
–
+
5V
0.1µF 18.2k
0.1µF
18.2k
5
1
2
3
4
0.1µF
5V
AV
= 100
2050 TA01a
350Ω
STRAIN
GAUGE
50Ω
GAIN
TRIM
LTC2050HV
–5V
2
1
0
–1
–2
(µV)
2 40 68
10
TIME (SEC) 2050 TA01b
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by U.S. patents, including 5481178.
LTC2050/LTC2050HV
2
Rev. E
For more information www.analog.com
OUT 1
V– 2
TOP VIEW
S5 PACKAGE
5-LEAD PLASTIC TSOT-23
TJMAX = 150°C, θJA
= 250°C/W
+IN 3
5 V+
4 –IN
OUT 1
V– 2
+IN 3
6 V+
5
SHDN
4 –IN
TOP VIEW
S6 PACKAGE
6-LEAD PLASTIC TSOT-23
TJMAX = 150°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 = 150°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 ......................... Indefinite
(Note 1)
Operating Temperature Range
LTC2050 ............................................–40°C to 125°C
LTC2050HVMP .................................. –55°C to 150°C
Specified Temperature Range
(Note 3) ..................................................–55°C to 150°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
LTC2050HVMPS6#PBF LTC2050HVMPS6#TRPBF LTHGP 6-Lead Plastic TSOT-23 –55°C to 150°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
LTC2050/LTC2050HV
3
Rev. E
For more information www.analog.com
ORDER INFORMATION
LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION SPECIFIED TEMPERATURE RANGE
LTC2050HVIS8#PBF LTC2050HVIS8#TRPBF 050HVI 8-Lead Plastic SO –40°C to 85°C
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
Contact the factory for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.
Tape and reel specifications. Some packages are available in 500 unit reels through designated sales channels with #TRMPBF suffix.
LTC2050/LTC2050HV
4
Rev. E
For more information www.analog.com
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 LTC2050/LTC2050HV
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 2 2 V/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 specifications which apply over
the full operating temperature range, otherwise specifications are at TA = 25°C. VS = 3V unless otherwise noted. (Note 3)
LTC2050/LTC2050HV
5
Rev. E
For more information www.analog.com
PARAMETER CONDITIONS
C, I SUFFIXES H, MP 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)
LTC2050HVMP
l
l
±0.03 ±0.05
±0.10
µV/°C
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
LTC2050HVMP
l
±7 ±50
±8000
pA
pA
Input Offset Current LTC2050
l
±300
±400
±300
±1000
pA
pA
LTC2050HV
l
±100
±200
±100
±1000
pA
pA
LTC2050HVMP l±2000 pA
Input Noise Voltage RS = 100Ω, 0.01Hz to 10Hz 1.5 1.5 µVP-P
Common Mode Rejection Ratio LTC2050/LTC2050HV
VCM = GND to (V+ – 1.3)
VCM = GND to (V+ – 1.3)
l
120
115
130
130
120
110
130
130
dB
dB
LTC2050HVMP
VCM = GND to (V+ – 1.3)
l
107
130
dB
Power Supply Rejection Ratio VS = 2.7V to 6V
l
120
115
130
130
120
115
130
130
dB
dB
LTC2050HVMP
VS = 4.5V to 11V
l
117
112
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 2 2 V/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 specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. (LTC2050/LTC2050HV) VS = 5V unless otherwise noted. (Note 3)
LTC2050/LTC2050HV
6
Rev. E
For more information www.analog.com
ELECTRICAL CHARACTERISTICS
(LTC2050HV) The l denotes the specifications which apply over the full
operating temperature range, otherwise specifications are at TA = 25°C. VS = ±5V unless otherwise noted. (Note 3)
PARAMETER CONDITIONS
C, I SUFFIXES H, MP 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)
LTC2050HVMP
l
l
±0.03 ±0.05
±0.10
µV/°C
µV/°C
Long-Term Offset Drift 50 50 nV/√mo
Input Bias Current (Note 4) LTC2050HV
l
±25 ±125
±300
±25 ±125
±4000
pA
pA
LTC2050HVMP
l
±25 ±125
±8000
pA
pA
Input Offset Current (Note 4) LTC2050HV
l
±250
±500
±250
±1000
pA
pA
LTC2050HVMP l±2000 pA
Input Noise Voltage RS = 100Ω, 0.01Hz to 10Hz 1.5 1.5 µVP-P
Common Mode Rejection Ratio LTC2050HV
VCM = V– to (V+ – 1.3)
VCM = V– to (V+ – 1.3)
l
120
115
130
130
120
115
130
130
dB
dB
LTC2050HVMP
VCM = V– to (V+ – 1.3)
l
112
130
dB
Power Supply Rejection Ratio VS = 2.7V to 11V
l
120
115
130
130
120
115
130
130
dB
dB
LTC2050HVMP
VS = 4.5 to 11V
l
117
112
130
130
dB
dB
Large-Signal Voltage Gain RL = 10k
l
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. The
are guaranteed to meet the temperature limits of –55°C and 150°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
Rev. E
For more information www.analog.com
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
Input Bias Current vs Temperature
(LTC2050)
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
1 3 40
2050 G02
02
5
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 G03
1M
–PSRR
+PSRR
OUTPUT CURRENT (mA)
0.01
2
3
4
5
0.1 1
1
0
VS = 5V
VS = 3V
FREQUENCY (Hz)
0
GAIN (dB)
20
40
60
100
100 1k 100k 1M 10M
2050 G08
–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 G09
–50
125
INPUT BIAS CURRENT (pA)
50
0 25
VS = 3V
VS = 5V
LOAD RESISTANCE (kΩ)
0
OUTPUT SWING (V)
5
4
3
2
1
0
–1
–2
–3
–4
–5 8
2050 G06
246
10
RL TO GND
OUTPUT CURRENT (mA)
0.01
OUTPUT SWING (V)
5
4
3
2
1
0
–1
–2
–3
–4
–5
2050 G07
0.1
10
1.0
RL TO GND
LOAD RESISTANCE (kΩ)
0
OUTPUT SWING (V)
6
5
4
3
2
1
024
2050 G04
68
10
RL TO GND
VS = 5V
VS = 3V
LTC2050/LTC2050HV
8
Rev. E
For more information www.analog.com
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
INPUT COMMON MODE VOLTAGE (V)
0
INPUT BIAS CURRENT MAGNITUDE (pA)
3
5
2050 G12
1 2 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 G13
–5 –3 –1 1 3
5
VS = ±5V
VS = 5V
VS = 3V
1µs/DIV
0.5/DIV
2050 G14
AV = 1
RL = 100k
CL = 50pF
V
S
= 5V
500µs/DIV
INPUT (V)
OUTPUT (V)
–0.2
1.5
0
0
2050 G15
AV = –100
RL = 100k
CL = 10pF
V
S
= ±1.5V
Input Bias Current vs Temperature
(LTC2050HVMP)
Input Bias Current vs Temperature
(LTC2050HV)
V
S
= 5V
V
S
= ±5V
TEMPERATURE (°C)
–50
–25
0
25
50
75
100
125
150
1
10
100
1k
10k
INPUT BIAS CURRENT (pA)
2050 G10
V
S
= 3V
V
S
= 5V
V
S
= ±5V
TEMPERATURE (°C)
–50
–15
20
55
90
125
1
10
100
1k
10k
INPUT BIAS CURRENT (pA)
2050 G11
LTC2050/LTC2050HV
9
Rev. E
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Sampling Frequency
vs Supply Voltage
Sampling Frequency
vs Temperature
Supply Current vs Supply Voltage
Supply Current vs Temperature
SUPPLY VOLTAGE (V)
2.5
5
SAMPLING FREQUENCY (kHz)
6
7
3.53.0 4.54.0 5.0 5.5
2050 G16
8
9
10
6.0
TA = 25°C
V
S
= 5V
TEMPERATURE (°C)
–50
–25
0
25
50
75
100
125
150
5
6
7
8
9
10
SAMPLING FREQUENCY (kHz)
2050 G17
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (mA)
2 4 6810
1.2
1.0
0.8
0.6
0.4
0.2
0
2050 G18
TA = 25°C
V
S
= 3V
V
S
= 5V
V
S
= ±5V
TEMPERATURE (°C)
–50
–30
–10
10
30
50
70
90
110
130
150
0.5
0.6
0.7
0.8
0.9
1.0
1.1
SUPPLY CURRENT (mA)
2050 G19
TYPICAL PERFORMANCE CHARACTERISTICS
LTC2050/LTC2050HV
10
Rev. E
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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
11
Rev. E
For more information www.analog.com
output 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 first 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 defined 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 pro-
tection diodes on the inputs increases the input bias cur-
rents of both inputs in the positive direction, while the
current caused by the charge injection stays relatively
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 specified 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 float, the device operates normally.
When the shutdown pin is pulled low, the device enters
shutdown mode; supply current drops to 3µA, all clock-
ing 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 first 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 magni-
tude of the gain setting resistors. The LTC2050 has a resi-
due clock feedthrough of less then 1µV
RMS
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 volt-
age. The current spikes are multiplied by the impedance
seen at the input terminals of the op amp, appearing at the
APPLICATIONS INFORMATION
LTC2050/LTC2050HV
12
Rev. E
For more information www.analog.com
Single Supply Thermocouple Amplifier
Gain of 1001 Single Supply Instrumentation Amplifier
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
Instrumentation Amplifier with 100V Common Mode Input Voltage
–
+
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
+
–
V
IN
LTC2050/LTC2050HV
13
Rev. E
For more information www.analog.com
High Precision 3-Input Mux
–
+
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
TYPICAL APPLICATIONS
Low Side Power Supply Current Sensing
–
+
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
LTC2050/LTC2050HV
14
Rev. E
For more information www.analog.com
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 Rev B)
LTC2050/LTC2050HV
15
Rev. E
For more information www.analog.com
PACKAGE DESCRIPTION
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
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
S6 Package
6-Lead Plastic TSOT-23
(Reference LTC DWG # 05-08-1636)
LTC2050/LTC2050HV
16
Rev. E
For more information www.analog.com
PACKAGE DESCRIPTION
.016 – .050
(0.406 – 1.270)
.010 – .020
(0.254 – 0.508)× 45°
0°– 8° TYP
.008 – .010
(0.203 – 0.254)
SO8 REV G 0212
.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)
4. PIN 1 CAN BE BEVEL EDGE OR A DIMPLE
S8 Package
8-Lead Plastic Small Outline (Narrow .150 Inch)
(Reference LTC DWG # 05-08-1610 Rev G)
LTC2050/LTC2050HV
17
Rev. E
For more information www.analog.com
Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog
Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. Specifications
subject to change without notice. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
REVISION HISTORY
REV DATE DESCRIPTION PAGE NUMBER
D 08/17 Updated TJMAX 2
E 11/18 Added MP option (higher temperature version) 1, 2, 4-6, 7-8
(Revision history begins at Rev D)
LTC2050/LTC2050HV
18
Rev. E
For more information www.analog.com
11/18
ANALOG DEVICES, INC. 1999-2018
www.analog.com
RELATED PARTS
TYPICAL APPLICATION
–
+
LTC2050
LT1034
+
–
VOUT
V+
10k
1
2
3
45
RSET
0 ≤ I
OUT ≤ 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
LT
®
1677 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