TPA191Q

概述

The TPA191Q series of zero-drift, bi-directional current sense amplifiers can sense voltage drops across shunts at common-mode voltages from −0.3 V to 36 V, independent of the supply voltage. Multiple fixed gains are available: 20 V/V, 50 V/V, 75 V/V, 100 V/V, 200 V/V, 500 V/V, and 1000 V/V. The integrated gain resistor network is highly matched, which minimizes gain errors and reduces the temperature drift. The low offset of the zero-drift architecture extends the range of current sensing, it allows for smaller sense resistors with lower power loss, while still ensuring accurate current measurements.

The TPA191Q devices operate from a single 2.7-V to 36-V power supply, drawing a typical 80-μA supply current. All versions are specified from −40°C 125°C, and offered in the SOT363 package.

• Status

  Production

• Rating

  Automotive

• Features

  Automotive 36V Vcm Bi-Directional Current Sense Amplifier

• 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 = 20, 50, 75, 100, 200, 500, 1000

• GE Max at full temp range (%)

  1

• GE Drift, max (ppm/c)

  10

• Vos max (μV)

  255

• 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