Product Summary

The LT19901 is a micropower precision difference amplifier with a very high common mode input voltage range. It has pin selectable gains of 1 or 10. The LT19901 operates over a ±250V common mode voltage range on a ±15V supply. The inputs are fault protected from common mode voltage transients up to ±350V and differential voltages up to ±500V. The applications of the LT19901 include: (1)Pin Selectable Gain of 1 or 10; (2)High Common Mode Voltage Range: 85V Window (VS = 5V, 0V); ±250V (VS = ±15V); (3)Common Mode Rejection Ratio: 70dB Min; (4)Input Protection to ±350V; (5)Gain Error: 0.28% Max; (6)PSRR: 82dB Min; (7)High Input Impedance: 2MΩ Differential, 500kΩ Common Mode; (8)Micropower: 120μA Max Supply Current; (9)Wide Supply Range: 2.7V to 36V; (10)–3dB Bandwidth: 100kHz; (11)Rail-to-Rail Output; (12)8-Pin SO Package.

Parametrics

LT19901 absolute maximum ratings: (1)Total Supply Voltage (V+ to V–): 36V; (2)Input Voltage Range Continuous: ±250V; Transient (0.1s): ±350V; Differential: ±500V; (3)Output Short-Circuit Duration: Indefinite; (4)Operating Temperature Range: –40℃ to 85℃; (5)Specified Temperature Range: –40℃ to 85℃; (6)Storage Temperature Range: –65℃ to 150℃; (7)Lead Temperature (Soldering, 10 sec.): 300℃.

Features

LT19901 features: (1)Battery Cell Voltage Monitoring; (2)High Voltage Current Sensing; (3)Signal Acquisition in Noisy Environments; (4)Input Protection; (5)Fault Protected Front Ends; (6)Level Sensing; (7)Isolation.

Diagrams

LT19901 diagram

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Data Sheet
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