LT1990 - Linear Technology

LT1990 Difference Amplifier

LT1990 ±250V Input Range G = 1, 10, Micropower, Difference Amplifier DESCRIPTIO The LT®1990 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 LT1990 operates over a ±250V common mode voltage range on a ±15V supply. The inputs are fault protected from common mode voltag.

Features

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■ Battery Cell Voltage Monitoring High Voltage Current Sensing Signal Acquisition in Noisy Environments Input Protection Fault Protected Front Ends Level Sensing Isolation TYPICAL APPLICATIO +VSOURCE Full-Bridge Load Current Monitor 5V LT1990 900k 7 2 1M 100k 10k 8
  – + IL RS 3 VREF = 1.5V 4 IN OUT LT6650 GND FB 54.9k 1nF 40k 40k 20k 1 1µF 1990 TA01 1M
  –12V ≤ VCM ≤ 73V VOUT = VREF ± (10
• IL
• RS) U
  – + U APPLICATIO S U 6 VOUT 10k 900k 100k 5 1990f 1 LT1990 ABSOLUTE (Notes 1, 2) AXI U RATI GS U W U PACKAGE/ORDER I FOR ATIO ORDER PART NUMBER TOP VIEW REF 1
  –IN 2 +IN 3 .