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Amplifiers & Special Function Circuits

TPA191

Zero-Drift, Bi-Directional Current Sense Amplifier

  • Overview
  • Development Resources
  • Application
  • Ordering Detail

Overview

The TPA191 series of zero-drift, bi-directional current sense amplifier 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 devices operate from a single 2.7-V to 36-V power supply, with drawing a typical of 80-μA supply current. All versions are specified from −40°C 125°C, and offered in the SOT363 package.


  • Status

    Production

  • Rating

    Industrial

  • Feature

    /

  • 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

  • Channel

    1

  • Comparator

    0

  • Package

    SC70-6

Development Resources

  • Documentation

Application

    • Current Sensing (High−Side/Low−Side)

    • Battery Charger

    • Power Management

    • Cell Phone Charger

    • Electrical Cigarette

    • Wireless Charger

    • Telecom Equipment


Ordering Detail

Order Part Number Buy Rating Feature Status 1ku Price Release Date Package Lead time (week) MSL Packing MPQ CPQ
TPA191A2-SC6R
Buy now
Industrial Grade / Released $0.357 2023-06-19 SOT363 10 MSL1 T&R 3000 120000
TPA191A4-SC6R
Buy now
Industrial Grade / Released $0.335 2023-08-15 SOT363 10 MSL1 T&R 3000 120000
TPA191A5-SC6R
Buy now
Industrial Grade / Released $0.335 2023-08-15 SOT363 10 MSL1 T&R 3000 120000
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