Datasheet LT1920 (Analog Devices)
| Manufacturer | Analog Devices |
| Description | Single Resistor Gain Programmable, Precision Instrumentation Amplifier |
| Pages / Page | 12 / 1 — FEATURES. DESCRIPTIO. Single Gain Set Resistor: G = 1 to 10,000. Gain … |
| File Format / Size | PDF / 308 Kb |
| Document Language | English |
FEATURES. DESCRIPTIO. Single Gain Set Resistor: G = 1 to 10,000. Gain Error: G = 10, 0.3% Max. Input Offset Voltage Drift: 1
Model Line for this Datasheet
Text Version of Document
LT1920 Single Resistor Gain Programmable, Precision Instrumentation Amplifier
U FEATURES DESCRIPTIO
■
Single Gain Set Resistor: G = 1 to 10,000
The LT®1920 is a low power, precision instrumentation ■
Gain Error: G = 10, 0.3% Max
amplifier that requires only one external resistor to set gains ■ Gain Nonlinearity: G = 10, 30ppm Max of 1 to 10,000. The low voltage noise of 7.5nV/√Hz (at 1kHz) ■ Input Offset Voltage: G = 10, 225µV Max is not compromised by low power dissipation (0.9mA typical ■
Input Offset Voltage Drift: 1
µ
V/
°
C Max
for ±2.3V to ±15V supplies). ■ Input Bias Current: 2nA Max The high accuracy of 30ppm maximum nonlinearity and ■ PSRR at G = 1: 80dB Min 0.3% max gain error (G = 10) is not degraded even for load ■ CMRR at G = 1: 75dB Min resistors as low as 2k (previous monolithic instrumentation ■ Supply Current: 1.3mA Max amps used 10k for their nonlinearity specifications). The ■ Wide Supply Range: ± 2.3V to ±18V LT1920 is laser trimmed for very low input offset voltage ■ 1kHz Voltage Noise: 7.5nV/√Hz (125µV max), drift (1µV/°C), high CMRR (75dB, G = 1) and ■ 0.1Hz to 10Hz Noise: 0.28µVP-P PSRR (80dB, G = 1). Low input bias currents of 2nA max are ■ Available in 8-Pin PDIP and SO Packages achieved with the use of superbeta processing. The output ■
Meets IEC 1000-4-2 Level 4 ESD Tests with
can handle capacitive loads up to 1000pF in any gain configu-
Two External 5k Resistors
ration while the inputs are ESD protected up to 13kV (human body). The LT1920 with two external 5k resistors passes the
U
IEC 1000-4-2 level 4 specification.
APPLICATIO S
The LT1920, offered in 8-pin PDIP and SO packages, is a pin ■ Bridge Amplifiers for pin and spec for spec improved replacement for the ■ Strain Gauge Amplifiers AD620. The LT1920 is the most cost effective solution for ■ Thermocouple Amplifiers precision instrumentation amplifier applications. For even ■ Differential to Single-Ended Converters better guaranteed performance, see the LT1167. ■ Medical Instrumentation , LTC and LT are registered trademarks of Linear Technology Corporation.
U TYPICAL APPLICATIO Single Supply Barometer
VS
Gain Nonlinearity
R5 LUCAS NOVA SENOR 392k VS 3 NPC-1220-015-A-3L + 8 – 1 2 – 1/2 1 1 4 7 1 LT1490 5k 5k LT1634CCZ-1.25 2 – R1 2 4 825Ω 6 R6 LT1920 1k R2 G = 60 2 5k 5k 12Ω 8 5 6 + 3 3 + TO 4-DIGIT NONLINEARITY (100ppm/DIV) R4 RSET 4 50k DVM 5 5 + R3 OUTPUT VOLTAGE (2V/DIV) 1/2 7 50k G = 1000 LT1490 RL = 1k 6 – VOUT = ±10V 1167 TA02 R8 R7
VOLTS INCHES Hg
100k 50k 2.800 28.00 VS = 8V TO 30V 3.000 30.00 3.200 32.00 1920 TA01 1
U FEATURES DESCRIPTIO
■
Single Gain Set Resistor: G = 1 to 10,000
The LT®1920 is a low power, precision instrumentation ■
Gain Error: G = 10, 0.3% Max
amplifier that requires only one external resistor to set gains ■ Gain Nonlinearity: G = 10, 30ppm Max of 1 to 10,000. The low voltage noise of 7.5nV/√Hz (at 1kHz) ■ Input Offset Voltage: G = 10, 225µV Max is not compromised by low power dissipation (0.9mA typical ■
Input Offset Voltage Drift: 1
µ
V/
°
C Max
for ±2.3V to ±15V supplies). ■ Input Bias Current: 2nA Max The high accuracy of 30ppm maximum nonlinearity and ■ PSRR at G = 1: 80dB Min 0.3% max gain error (G = 10) is not degraded even for load ■ CMRR at G = 1: 75dB Min resistors as low as 2k (previous monolithic instrumentation ■ Supply Current: 1.3mA Max amps used 10k for their nonlinearity specifications). The ■ Wide Supply Range: ± 2.3V to ±18V LT1920 is laser trimmed for very low input offset voltage ■ 1kHz Voltage Noise: 7.5nV/√Hz (125µV max), drift (1µV/°C), high CMRR (75dB, G = 1) and ■ 0.1Hz to 10Hz Noise: 0.28µVP-P PSRR (80dB, G = 1). Low input bias currents of 2nA max are ■ Available in 8-Pin PDIP and SO Packages achieved with the use of superbeta processing. The output ■
Meets IEC 1000-4-2 Level 4 ESD Tests with
can handle capacitive loads up to 1000pF in any gain configu-
Two External 5k Resistors
ration while the inputs are ESD protected up to 13kV (human body). The LT1920 with two external 5k resistors passes the
U
IEC 1000-4-2 level 4 specification.
APPLICATIO S
The LT1920, offered in 8-pin PDIP and SO packages, is a pin ■ Bridge Amplifiers for pin and spec for spec improved replacement for the ■ Strain Gauge Amplifiers AD620. The LT1920 is the most cost effective solution for ■ Thermocouple Amplifiers precision instrumentation amplifier applications. For even ■ Differential to Single-Ended Converters better guaranteed performance, see the LT1167. ■ Medical Instrumentation , LTC and LT are registered trademarks of Linear Technology Corporation.
U TYPICAL APPLICATIO Single Supply Barometer
VS
Gain Nonlinearity
R5 LUCAS NOVA SENOR 392k VS 3 NPC-1220-015-A-3L + 8 – 1 2 – 1/2 1 1 4 7 1 LT1490 5k 5k LT1634CCZ-1.25 2 – R1 2 4 825Ω 6 R6 LT1920 1k R2 G = 60 2 5k 5k 12Ω 8 5 6 + 3 3 + TO 4-DIGIT NONLINEARITY (100ppm/DIV) R4 RSET 4 50k DVM 5 5 + R3 OUTPUT VOLTAGE (2V/DIV) 1/2 7 50k G = 1000 LT1490 RL = 1k 6 – VOUT = ±10V 1167 TA02 R8 R7
VOLTS INCHES Hg
100k 50k 2.800 28.00 VS = 8V TO 30V 3.000 30.00 3.200 32.00 1920 TA01 1
