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LT1167| Datasheet

By datasheet - November 4th, 2008

LT1167| Datasheet

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LT1167 Single Resistor Gain Programmable, Precision Instrumentation Amplifier

FEATURES
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DESCRIPTIO

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Single Gain Set Resistor: G = 1 to 10,000 Gain Error: G = 10, 0.08% Max Input Offset Voltage Drift: 0.3uV/ C Max Meets IEC 1000-4-2 Level 4 ESD Tests with Two External 5k Resistors Gain Nonlinearity: G = 10, 10ppm Max Input Offset Voltage: G = 10, 60uV Max Input Bias Current: 350pA Max PSRR at G = 1: 105dB Min CMRR at G = 1: 90dB Min Supply Current: 1.3mA Max Wide Supply Range: 2.3V to 18V 1kHz Voltage Noise: 7.5nV/Hz 0.1Hz to 10Hz Noise: 0.28uVP-P Available in 8-Pin PDIP and SO Packages

APPLICATIO S
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Bridge Amplifiers Strain Gauge Amplifiers Thermocouple Amplifiers Differential to Single-Ended Converters Medical Instrumentation

The LT 1167 is a low power, precision instrumentation 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 part's high accuracy (10ppm maximum nonlinearity, 0.08% 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 LT1167 is laser trimmed for very low input offset voltage (40uV max), drift (0.3uV/ C), high CMRR (90dB, G = 1) and PSRR (105dB, G = 1). Low input bias currents of 350pA max are achieved with the use of superbeta processing. The output can handle capacitive loads up to 1000pF in any gain configuration while the inputs are ESD protected up to 13kV (human body). The LT1167 with two external 5k resistors passes the IEC 1000-4-2 level 4 specification. The LT1167, offered in 8-pin PDIP and SO packages, requires significant
ly less PC board area than discrete multi op amp and resistor designs. These advantages make the LT1167 the most cost effective solution for precision instrumentation amplifier applications.
, LTC and LT are registered trademarks of Linear Technology Corporation.

TYPICAL APPLICATIO
VS R5 392k 1 LT1634CCZ-1.25 2 2

Single Supply Barometer Gain Nonlinearity
3 1/2 LT1490 1 4 5k R6 1k 5k R1 825 2 6 OFFSET R4 ADJUST 50k R3 50k 6 R8 100k RSET 5 5k 5k R2 12 8 3 LT1167 G = 60 5 4 TO 4-DIGIT DVM 6

4

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1/2 LT1490 7 R7 50k

5

0.2% ACCURACY AT 25 C 1.2% ACCURACY AT 0 C TO 60 C VS = 8V TO 30V

+

+

3

NONLINEARITY (100ppm/DIV)

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8

LUCAS NOVA SENOR NPC-1220-015-A-3L

VS 1 2 1 7

VOLTS 2.800 3.000 3.200

INCHES Hg 28.00 30.00 32.00

1167 TA01

U
1167 TA02

U

U

G = 1000 RL = 1k VOUT = 10V

OUTPUT VOLTAGE (2V/DIV)

1


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