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LTC2050/LTC2050HV Zero-Drift Operational Amplifiers in SOT-23
FEATURES
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DESCRIPTIO
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Maximum Offset Voltage of 3V Maximum Offset Voltage Drift of 30nV/C Noise: 1.5VP-P (0.01Hz to 10Hz Typ) Voltage Gain: 140dB (Typ) PSRR: 130dB (Typ) CMRR: 130dB (Typ) Supply Current: 0.8mA (Typ) Supply Operation: 2.7V to 6V (LTC2050) 2.7V to 5.5V (LTC2050HV) Extended Common Mode Input Range Output Swings Rail-to-Rail Input Overload Recovery Time: 2ms (Typ) Operating Temperature Range: - 40C to 125C SOT-23 Package
The LTC(R)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 800A 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 uncompromising DC performance. The typical input offset voltage and offset drift are 0.5V 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 negative supply up to typically 1V from the positive supply. The LTC2050 also has an enhanced output stage capable of driving loads as low as 2k to both supply rails. The openloop gain is typically 140dB. The LTC2050 also features a 1.5VP-P DC to 10Hz noise and a 3MHz gain bandwidth product.
, LTC and LT are registered trademarks of Linear Technology Corporation.
APPLICATIO S
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Thermocouple Amplifiers Electronic Scales Medical Instrumentation Strain Gauge Amplifiers High Resolution Data Acquisition DC Accurate RC Active Filters Low Side Current Sense
TYPICAL APPLICATION
Differential Bridge Amplifier
2
5V 50 GAIN TRIM 5V 0.1F
Input Referred Noise 0.1Hz to 10Hz
0.1F
1
18.2k
V
350 STRAIN GAUGE
0
4
- +
5 1 AV = 100
LTC2050HV 3 2
-1
0.1F
18.2k
-2
2050 TA01
0
- 5V
U
2 4 6 TIME (SEC) 8 10
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1
LTC2050/LTC2050HV ABSOLUTE AXI U RATI GS (Note 1)
Operating Temperature Range ............. - 40C to 125C Specified Temperature Range (Note 3) ............................................... - 40C to 125C Storage Temperature Range ................ - 65C to 150C Lead Temperature (Soldering, 10 sec)................. 300C Total Supply Voltage (V + to V -) LTC2050 .............................................................. 7V LTC2050HV ......................................................... 12V Input Voltage ........................ (V + + 0.3V) to (V - - 0.3V) Output Short-Circuit Duration ......................... Indefinite
PACKAGE/ORDER I FOR ATIO
TOP VIEW OUT 1 V
-2
5 V+
OUT 1 V2
-
+IN 3
4 -IN
+IN 3
S5 PACKAGE 5-LEAD PLASTIC SOT-23
S6 PACKAGE 6-LEAD PLASTIC SOT-23
TJMAX = 125C, JA = 230CW
TJMAX = 125C, JA = 250CW
ORDER PART NUMBER LTC2050CS5 LTC2050IS5 LTC2050HS5 LTC2050HVCS5 LTC2050HVIS5 LTC2050HVHS5
S5 PART MARKING LTAEG LTAEG LTAEG LTAEH LTAEH LTAEH
ORDER PART NUMBER LTC2050CS6 LTC2050IS6 LTC2050HS6 LTC2050HVCS6 LTC2050HVIS6 LTC2050HVHS6
Consult LTC Marketing for parts specified with wider operating temperature ranges.
(LTC2050, LTC2050HV) The q denotes specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25C. VS = 3V unless otherwise noted. (Note 3)
PARAMETER Input Offset Voltage Average Input Offset Drift Long-Term Offset Drift Input Bias Current CONDITIONS (Note 2) (Note 2) LTC2050
q
ELECTRICAL CHARACTERISTICS
LTC2050HV
q
Input Offset Current
LTC2050
q
LTC2050HV
q
Input Noise Voltage Common Mode Rejection Ratio
RS = 100, 0.01Hz to 10Hz VCM = GND to (V + - 1.3) VCM = GND to (V + - 1.3)
2
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TOP VIEW
TOP VIEW 6 V+ 5 SHDN 4 -IN
SHDN 1 -IN 2 +IN 3 V- 4
8 7 6 5
NC V+ OUT NC
S8 PACKAGE 8-LEAD PLASTIC SO
TJMAX = 125C, JA = 190CW
S6 PART MARKING LTAEJ LTAEJ LTAEJ LTAEK LTAEK LTAEK
ORDER PART NUMBER LTC2050CS8 LTC2050IS8 LTC2050HVCS8 LTC2050HVIS8
S8 PART MARKING 2050 2050I 2050HV 050HVI
q
q
LTC2050C/LTC2050I MIN TYP MAX 0.5 3 0.03 50 20 75 300 1 50 100 150 200 100 150 1.5 115 130 110 130
MIN
LTC2050H TYP 0.5 50 20 1
MAX 3 0.05 75 4000 50 4000 150 1000 100 1000
115 110
1.5 130 130
UNITS V V/C nV/mo pA pA pA pA pA pA pA pA VP-P dB dB
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LTC2050/LTC2050HV
(LTC2050, LTC2050HV) The q denotes specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25C. VS = 3V unless otherwise noted. (Note 3)
PARAMETER Power Supply Rejection Ratio Large-Signal Voltage Gain Output Voltage Swing High Output Voltage Swing Low Slew Rate Gain Bandwidth Product Supply Current Shutdown Pin Input Low Voltage (VIL) Shutdown Pin Input High Voltage (VIH) Shutdown Pin Input Current Internal Sampling Frequency CONDITIONS VS = 2.7V to 6V
q
ELECTRICAL CHARACTERISTICS
RL = 10k
q
RL = 2k to GND RL = 10k to GND RL = 2k to GND RL = 10k to GND
q q q q
VSHDN = V IH, No Load VSHDN = V IL
q q q q
VSHDN = GND
q
LTC2050C/LTC2050I MIN TYP MAX 120 130 115 130 120 140 115 140 2.85 2.94 2.95 2.98 1 10 1 10 2 3 0.75 1.1 10 V - + 0.5 V + - 0.5 - 0.5 -3 7.5
MIN 120 115 120 115 2.85 2.95
LTC2050H TYP 130 130 140 140 2.94 2.98 1 1 2 3 0.75
MAX
10 10
1.2 10 V- + 0.5 -3
V + - 0.5 - 0.5 7.5
UNITS dB dB dB dB V V mV mV V/s MHz mA A V V A kHz
The q denotes specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25C. (LTC2050, LTC2050HV) VS = 5V unless otherwise noted. (Note 3)
PARAMETER Input Offset Voltage Average Input Offset Drift Long-Term Offset Drift Input Bias Current CONDITIONS (Note 2) (Note 2) LTC2050
q
q
LTC2050HV
q
Input Offset Current
LTC2050
q
LTC2050HV
q
Input Noise Voltage Common Mode Rejection Ratio Power Supply Rejection Ratio Large-Signal Voltage Gain Output Voltage Swing High Output Voltage Swing Low Slew Rate Gain Bandwidth Product Supply Current
RS = 100, 0.01Hz to 10Hz VCM = GND to (V + - 1.3) VCM = GND to (V + - 1.3) VS = 2.7V to 6V RL = 10k
q q q
RL = 2k to GND RL = 10k to GND RL = 2k to GND RL = 10k to GND
q q q q
VSHDN = V IH, No Load VSHDN = V IL
q q
LTC2050C/LTC2050I MIN TYP MAX 0.5 3 0.03 50 75 150 300 7 50 150 300 400 100 200 1.5 120 130 115 130 120 130 115 130 125 140 120 140 4.85 4.94 4.95 4.98 1 10 1 10 2 3 0.8 1.2 15
MIN
LTC2050H TYP 0.5 50 75 7
MAX 3 0.05 150 4000 50 4000 300 1000 100 1000
120 110 120 115 125 115 4.85 4.95
1.5 130 130 130 130 140 140 4.94 4.98 1 1 2 3 0.8
10 10
1.3 15
UNITS V V/C nV/mo pA pA pA pA pA pA pA pA VP-P dB dB dB dB dB dB V V mV mV V/s MHz mA A
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LTC2050/LTC2050HV
The q denotes specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25C. (LTC2050, LTC2050HV) VS = 5V unless otherwise noted. (Note 3)
PARAMETER Shutdown Pin Input Low Voltage (VIL) Shutdown Pin Input High Voltage (VIH) Shutdown Pin Input Current Internal Sampling Frequency CONDITIONS
q q
ELECTRICAL CHARACTERISTICS
VSHDN = GND
q
LTC2050C/LTC2050I MIN TYP MAX V - + 0.5 V + - 0.5 - 0.5 -7 7.5
MIN V + - 0.5
LTC2050H TYP
MAX V - + 0.5 -7
- 0.5 7.5
UNITS V V A kHz
(LTC2050HV) The q denotes specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25C. VS = 5V unless otherwise noted. (Note 3)
PARAMETER Input Offset Voltage Average Input Offset Drift Long-Term Offset Drift Input Bias Current (Note 4)
q
CONDITIONS (Note 2) (Note 2)
q
LTC2050C/LTC2050I MIN TYP MAX 0.5 50 25 125 300 250 500 1.5
q q
MIN
LTC2050H TYP 0.5 50 25
MAX 3 0.05 125 4000 250 1000
UNITS V V/C nV/mo pA pA pA pA VP-P dB dB dB dB dB dB V V V/s MHz
3 0.03
Input Offset Current (Note 4)
q
Input Noise Voltage Common Mode Rejection Ratio Power Supply Rejection Ratio Large-Signal Voltage Gain Maximum Output Voltage Swing Slew Rate Gain Bandwidth Product Supply Current Shutdown Pin Input Low Voltage (VIL) Shutdown Pin Input High Voltage (VIH) Shutdown Pin Input Current Internal Sampling Frequency
RS = 100, 0.01Hz to 10Hz VCM = V - to (V + - 1.3) VCM = V - to (V + - 1.3) VS = 2.7V to 11V RL = 10k
q
1.5 120 115 120 115 125 120 4.50 4.85 130 130 130 130 140 140 4.94 4.98 2 3 1.5 25 V - + 0.5 V+ - 0.5 -3 7.5 - 20 1 1.6 25 V - + 0.5
120 115 120 115 125 120 4.75 4.90
130 130 130 130 140 140 4.94 4.98 2 3
RL = 2k to GND RL = 10k to GND
q q
VSHDN = V IH, No Load VSHDN = V IL
q q q q
1
mA A V V A kHz
V+
- 0.5 -3 7.5 - 20
VSHDN = V -
q
Note 1: Absolute Maximum Ratings are those values beyond which the life of the device may be impaired. 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 - 40C and 125C. The LTC2050C/LTC2050HVC are guaranteed to meet the temperature limits of 0C and 70C. The LTC2050I/LTC2050HVI are guaranteed to meet the temperature limits of -40C and 85C. The LTC2050H/LTC2050HVH are guaranteed to meet the temperature limits of -40C and 125C.
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.
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4
LTC2050/LTC2050HV
TYPICAL PERFOR A CE CHARACTERISTICS
Common Mode Rejection Ratio vs Frequency
140 120 100
CMRR (dB)
VS = 3V OR 5V VCM = 0.5VP-P
CMRR (dB)
80 60 40 20 0 1 10 100 1k FREQUENCY (Hz) 10k 100k
2050 G01
80 VS = 3V 60 40 20 0 0 1 2 VCM (V) 3
VS = 5V
PSRR (dB)
Output Voltage Swing vs Load Resistance
6 5
OUTPUT SWING (V)
6
RL TO GND
5
OUTPUT VOLTAGE (V)
VS = 5V
4 3 2 1 0 0 2 8 6 4 LOAD RESISTANCE (k)
4 3 VS = 3V 2 1 0 0.01
OUTPUT SWING (V)
VS = 3V
Output Swing vs Output Current 5V Supply
5 4 3 RL TO GND
OUTPUT SWING (V)
120
PHASE (DEG)
GAIN (dB)
1 0 -1 -2 -3 -4 -5 0.01 0.1 1.0 OUTPUT CURRENT (mA) 10
2050 G17
40 20 0
BIAS CURRENT (pA)
2
UW
2050 G03
DC CMRR vs Common Mode Input Voltage
140 120 100
120 100
PSRR vs Frequency
-PSRR 80 +PSRR 60 40 20
TA = 25C
0
4
5
2050 G02
10
100
1k 10k 100k FREQUENCY (Hz)
1M
LTC2050 * G14
Output Swing vs Output Current
5 4 VS = 5V 3 2 1 0 -1 -2 -3 -4
Output Swing vs Load Resistance 5V Supply
RL TO GND
10
0.1 1 OUTPUT CURRENT (mA)
10
2050 G04
-5
0
2
6 8 4 LOAD RESISTANCE (k)
10
2050 G16
Gain/Phase vs Frequency
100 80 PHASE 60 GAIN 80 100
1k 10k
Bias Current vs Temperature
140 160
VS = 5V 100
10
VS = 3V
-20
VS = 3V OR 5V CL = 35pF RL = 10k 1k 10k 100k FREQUENCY (Hz) 1M
180 200 10M
2050 G05
-40 100
1 -50
-25
75 50 0 25 TEMPERATURE (C)
100
125
2050 G06
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5
LTC2050/LTC2050HV
TYPICAL PERFOR A CE CHARACTERISTICS
Input Bias Current vs Input Common Mode Voltage
160 60 50
INPUT BIAS CURRENT MAGNITUDE (pA)
140 120 VS = 5V 100 80 60 40 20 0 0 4 3 INPUT COMMON MODE VOLTAGE (V) 1 2 5 VS = 3V
INPUT BIAS CURRENT (pA)
20 10 0 -10 -5 -1 1 3 -3 INPUT COMMON MODE VOLTAGE (V) 5 VS = 3V VS = 5V
0.5V/DIV AV = 1 RL = 100k CL = 50pF VS = 5V
Input Overload Recovery
10
SAMPLING FREQUENCY (kHz)
OUTPUT (V)
9
SAMPLING FREQUENCY (kHz)
1.5
0
INPUT (V)
0 -0.2
AV = -100 RL = 100k CL = 10pF VS = 1.5V
500s/DIV
Supply Current vs Supply Voltage
1.2 TA = 25C 1.0 SUPPLY CURRENT (mA) 0.8 0.6 0.4 0.2 0 SUPPLY CURRENT (mA)
0.8 1.0
2
4
6
UW
2050 G13
Input Bias Current vs Input Common Mode Voltage (LTC2050HV)
Transient Response
40 30
VS = 5V
1s/DIV
2050 G07
2050 G15
Sampling Frequency vs Supply Voltage
10
Sampling Frequency vs Temperature
TA = 25C
9
8
8 VS = 5V 7
7
6
6
5
2050 G08
2.5
3.0
3.5 4.0 4.5 5.0 SUPPLY VOLTAGE (V)
5.5
6.0
5 -50
-25
50 25 0 75 TEMPERATURE (C)
100
125
2050 G09
2050 G10
Supply Current vs Temperature
VS = 5V VS = 3V 0.6
0.4
0.2
8 6 SUPPLY VOLTAGE (V)
10
2050 G11
0 -50
-25
50 0 75 25 TEMPERATURE (C)
100
125
2050 G12
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LTC2050/LTC2050HV
TEST CIRCUITS
Electrical Characteristics Test Circuit
100k OUTPUT V+ 10 4
10 100k
DC-10Hz Noise Test Circuit
475k
- +
5 LTC2050 1
4
-
LTC2050 1
0.01F 158k 0.1F 316k 475k
3
3
-
0.01F LT1012 TO X-Y RECORDER
2 V-
RL
2050 TC01
+
+
FOR 1Hz NOISE BW INCREASE ALL THE CAPACITORS BY A FACTOR OF 10.
2050 TC02
APPLICATIONS INFORMATION
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 3A, 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 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 magnitude of the gain setting resistors. The LTC2050 has a residue clock feedthrough of less then 1VRMS 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 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 1VRMS 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.
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W
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7
LTC2050/LTC2050HV
APPLICATIONS INFORMATION
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 70C. At temperatures above 70C, 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 relatively constant. At elevated temperatures (above 85C) 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.
TYPICAL APPLICATIONS
Single Supply Thermocouple Amplifier
1k 1% 100 255k 1% 0.068F
5V 2 LT1025A K GND 4 R- 5 7
-
TYPE K
LT1025 COMPENSATES COLD JUNCTION OVER 0C TO 100C TEMPERATURE RANGE
10k
4
- +
LTC2050 -VIN 3 2
OUTPUT DC OFFSET 6mV FOR 0.1% RESISTORS, CMRR = 54dB
8
U
V+
W
U
U
U
5V 4
- +
0.1F
5 LTC2050 1 VOUT 10mV/C
3
+
2
2050 TA03
Gain of 1001 Single Supply Instrumentation Amplifier
10 0.1F
10k V+ 1 10 4
5
- +
5 LTC2050 1 VOUT
+VIN
3
2
2050 TA04
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LTC2050/LTC2050HV
TYPICAL APPLICATIONS
Instrumentation Amplifier with 100V Common Mode Input Voltage
1k V+ 1M + VIN - 1k 1M 4 1M
High Precision Three-Input Mux
1.1k 10k SHDN 4
- +
5 LTC2050 1
IN 1 3 AV = 10 10
10k SHDN 5 LTC2050 1
4
- +
IN 2 3 AV = 1000
SHDN 4
- +
5 LTC2050 1
IN 3 3 AV = 1
SELECT INPUTS ARE CMOS LOGIC COMPATIBLE
U
- +
5 1 1k 4
V+
LTC2050HV 3 2 V-
- +
5 1 VOUT
LTC2050HV 3 2 V-
OUTPUT OFFSET 3mV FOR 0.1% RESISTORS, CMRR = 54dB
2050 TA06
Low-Side Power Supply Current Sensing
5V 3 5 1 OUT 3V/AMP LOAD CURRENT IN MEASURED CIRCUIT, REFERRED TO -5V
SEL1
+ -
LTC2050HV 4 10 OUT TO MEASURED CIRCUIT 3m LOAD CURRENT - 5V 2 10k
SEL2
0.1F
2050 TA08
SEL3
2050 TA07
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LTC2050/LTC2050HV
PACKAGE DESCRIPTION
S5 Package 5-Lead Plastic SOT-23
(Reference LTC DWG # 05-08-1633)
0.62 MAX 0.95 REF 2.80 - 3.10 (NOTE 4)
3.85 MAX 2.62 REF
RECOMMENDED SOLDER PAD LAYOUT PER IPC CALCULATOR
0.20 BSC 0.90 - 1.45 DATUM `A'
0.35 - 0.55 REF 0.09 - 0.20 (NOTE 3) 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. PACKAGE EIAJ REFERENCE IS SC-74A (EIAJ)
0.62 MAX
3.85 MAX 2.62 REF
RECOMMENDED SOLDER PAD LAYOUT PER IPC CALCULATOR
0.20 BSC 0.90 - 1.45 DATUM `A'
0.09 - 0.20 (NOTE 3) 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. PACKAGE EIAJ REFERENCE IS SC-74A (EIAJ)
10
U
1.22 REF
1.4 MIN
2.60 - 3.00
1.50 - 1.75 (NOTE 4)
PIN ONE 0.25 - 0.50 TYP 5 PLCS NOTE 3
0.95 BSC 0.90 - 1.30
0.00 - 0.15
1.90 BSC
S5 SOT-23 0502
ATTENTION: ORIGINAL SOT23-5L PACKAGE. MOST SOT23-5L PRODUCTS CONVERTED TO THIN SOT23 PACKAGE, DRAWING # 05-08-1635 AFTER APPROXIMATELY APRIL 2001 SHIP DATE
S6 Package 6-Lead Plastic SOT-23
(Reference LTC DWG # 05-08-1634)
0.95 REF 2.80 - 3.10 (NOTE 4)
1.22 REF
1.4 MIN
2.60 - 3.00 1.50 - 1.75 (NOTE 4) PIN ONE ID
0.95 BSC 0.90 - 1.30
0.25 - 0.50 TYP 6 PLCS NOTE 3
0.35 - 0.55 REF
1.90 BSC
0.09 - 0.15 NOTE 3
S6 SOT-23 0502
ATTENTION: ORIGINAL SOT23-6L PACKAGE. MOST SOT23-6L PRODUCTS CONVERTED TO THIN SOT23 PACKAGE, DRAWING # 05-08-1636 AFTER APPROXIMATELY APRIL 2001 SHIP DATE
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LTC2050/LTC2050HV
PACKAGE DESCRIPTION
S8 Package 8-Lead Plastic Small Outline (Narrow .150 Inch)
(Reference LTC DWG # 05-08-1610)
.050 BSC 8
.245 MIN
.030 .005 TYP RECOMMENDED SOLDER PAD LAYOUT .010 - .020 x 45 (0.254 - 0.508) .008 - .010 (0.203 - 0.254) 0- 8 TYP
.016 - .050 (0.406 - 1.270) NOTE: 1. DIMENSIONS IN
INCHES (MILLIMETERS) 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)
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 representation that the interconnection of its circuits as described herein will not infringe on existing patent rights.
U
.045 .005
.189 - .197 (4.801 - 5.004) NOTE 3 7 6 5
.160 .005 .228 - .244 (5.791 - 6.197)
.150 - .157 (3.810 - 3.988) NOTE 3
1
2
3
4
.053 - .069 (1.346 - 1.752)
.004 - .010 (0.101 - 0.254)
.014 - .019 (0.355 - 0.483) TYP
.050 (1.270) BSC
SO8 0303
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LTC2050/LTC2050HV
TYPICAL APPLICATIONS
Ground Referred Precision Current Sources
LT1034 V+ 10k 4 0 IOUT 4mA (V -) + 1.5V VOUT - 1V + VOUT - 1.235V IOUT = ------ RSET 5 LTC2050 4 1 RSET
- +
LTC2050 3 2
0 IOUT 4mA 0.2V VOUT (V+) - 1.5V
RELATED PARTS
PART NUMBER LTC1049 LTC1050 LTC1150 LTC1152 LT1677 LT1884/LT1885 LTC2051 DESCRIPTION Low Power Zero-Drift Op Amp Precision Zero-Drift Op Amp 15V Zero-Drift Op Amp Rail-to-Rail Input and Output Zero-Drift Op Amp Low Noise Rail-to-Rail Input and Ouptput Precision Op Amp Rail-to-Rail Output Precision Op Amp Dual Zero-Drift Op Amp COMMENTS Low Supply Current 200A Single Supply Operation 4.75V to 16V, Noise Tested and Guaranteed Dual/Quad High Voltage Operation 18V Single Zero-Drift Op Amp with Rail-to-Rail Input and Output and Shutdown VOS = 90V, VS = 2.7V to 44V VOS = 50V, IB = 400pA, VS = 2.7V to 40V Dual Version of the LTC2050 in MS8 Package
LTC1051/LTC1053 Precision Zero-Drift Op Amp
12
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900 q FAX: (408) 434-0507
q
U
5 1 3 RSET 1.235V IOUT = ------ RSET
+ -
10k
2 V-
+
VOUT -
LT1034
2050 TA05
2050fa LT/TP 0503 1K REV A * PRINTED IN USA
www.linear.com
(c) LINEAR TECHNOLOGY CORPORATION 1999

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