TPA191

概述

The TPA191 is a series of zero-drift, bi-directional current sense amplifiers that can sense voltage drops across shunts at common-mode voltages from −0.3 V to 36 V, independent of the supply voltage. Five fixed gains are available: 20 V/V, 50 V/V, 75 V/V, 100 V/V, and 200 V/V. The integration-matched gain resistor network minimizes gain errors and reduces the temperature drift. The low offset of the zero-drift architecture enables current sensing with the maximum drops across the shunt as low as 10 mV full-scale.

The TPA191 series operates from a single 2.7-V to 36-V power supply, while drawing 80-μA supply current (typical). All versions are specified from −40°C 125°C, and offered in the SOT363 (SC70-6) package.

• Status

  Production

• Rating

  Industrial

• Features

  /

• VCM Min

  -0.3

• VCM Max

  36

• Vos drift Typ (μV/c)

  0.2

• Input Direction

  Bi-dir

• CMRR (Min) (dB)

  95

• BW (kHz)

  150 at G=20;80 at G=50;50 at G=75;30 at G=100;15 at G=200

• Gain Option

  G = 50, 100, 200

• GE Max at full temp range (%)

  1

• GE Drift, max (ppm/c)

  10

• Vos max (μV)

  50

• Ib (Typ) (nA)

  22000

• PWM Rejection

  NO

• VS Min

  2.7

• VS Max

  36

• Iq (Max) (μA)

  115

• Number of Channels

  1

• Comparator

  0

• Package

  SOT363