LT1920 Linear Technology, LT1920 Datasheet

LT1920

Manufacturer Part Number

LT1920

Description

Single Resistor Gain Programmable/ Precision Instrumentation Amplifier

Manufacturer

Linear Technology

Datasheet

1.LT1920.pdf (12 pages)

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APPLICATIO S

FEATURES

TYPICAL APPLICATIO

LT1634CCZ-1.25

Single Gain Set Resistor: G = 1 to 10,000

Gain Error: G = 10, 0.3% Max

Gain Nonlinearity: G = 10, 30ppm Max

Input Offset Voltage: G = 10, 225 V Max

Input Offset Voltage Drift: 1 V/ C Max

Input Bias Current: 2nA Max

PSRR at G = 1: 80dB Min

CMRR at G = 1: 75dB Min

Supply Current: 1.3mA Max

Wide Supply Range: 2.3V to 18V

1kHz Voltage Noise: 7.5nV/ Hz

0.1Hz to 10Hz Noise: 0.28 V

Available in 8-Pin PDIP and SO Packages

Meets IEC 1000-4-2 Level 4 ESD Tests with

Two External 5k Resistors

Bridge Amplifiers

Strain Gauge Amplifiers

Thermocouple Amplifiers

Differential to Single-Ended Converters

Medical Instrumentation

392k

50k

100k

–

LT1490

1/2

–

LT1490

1/2

Single Supply Barometer

50k

LUCAS NOVA SENOR

NPC-1220-015-A-3L

SET

P-P

–

= 8V TO 30V

825

–

LT1920

G = 60

VOLTS

2.800

3.000

3.200

DESCRIPTIO

The LT

amplifier that requires only one external resistor to set gains

of 1 to 10,000. The low voltage noise of 7.5nV/ Hz (at 1kHz)

is not compromised by low power dissipation (0.9mA typical

for 2.3V to 15V supplies).

The high accuracy of 30ppm maximum nonlinearity and

0.3% max gain error (G = 10) is not degraded even for load

resistors as low as 2k (previous monolithic instrumentation

amps used 10k for their nonlinearity specifications). The

LT1920 is laser trimmed for very low input offset voltage

(125 V max), drift (1 V/ C), high CMRR (75dB, G = 1) and

PSRR (80dB, G = 1). Low input bias currents of 2nA max are

achieved with the use of superbeta processing. The output

can handle capacitive loads up to 1000pF in any gain configu-

ration while the inputs are ESD protected up to 13kV (human

body). The LT1920 with two external 5k resistors passes the

IEC 1000-4-2 level 4 specification.

The LT1920, offered in 8-pin PDIP and SO packages, is a pin

for pin and spec for spec improved replacement for the

AD620. The LT1920 is the most cost effective solution for

precision instrumentation amplifier applications. For even

better guaranteed performance, see the LT1167.

, LTC and LT are registered trademarks of Linear Technology Corporation.

Programmable, Precision

Instrumentation Amplifier

INCHES Hg

28.00

30.00

32.00

4-DIGIT

DVM

1920 is a low power, precision instrumentation

1920 TA01

Single Resistor Gain

G = 1000

OUT

= 1k

= 10V

Gain Nonlinearity

OUTPUT VOLTAGE (2V/DIV)

LT1920

1167 TA02

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