TPA1285

概述

The TPA1285, high-precision, high common-voltage, 2-channel high-side current sense amplifier, has very high precision accuracy specifications of Vos less than 100 μV (max) and gain error less than 0.5% (max). Three fixed gains are available: 20 V/V, 50 V/V, and 100 V/V. The low offset of the zero-drift architecture enables current sensing with maximum drops across the shunt as low as 5 mV full-scale.

The TPA1285 features an input common-mode voltage ranging from 3.0 V to 76 V with 80 kHz of smallsignal bandwidth, which makes it ideal for small signal conditioning interfacing with a SAR ADC.

The TPA1285 offers breakthrough performance throughout the −40°C to +125°C temperature range. It features a zero-drift core, which leads to a maxim offset drift of 0.4μV/°C throughout the operating temperature range and the common-mode voltage range. The TPA1285 is offered an 8-pin MSOP package.

• Status

  Production

• Rating

  Industrial

• Features

  /

• VCM Min

  3

• VCM Max

  76

• Vos drift Typ (μV/c)

  <0.4

• Input Direction

  Uni-dir

• CMRR (Min) (dB)

  110

• BW (kHz)

  60

• Gain Option

  G = 20

• GE Max at full temp range (%)

  0.5

• GE Drift, max (ppm/c)

  10

• Vos max (μV)

  100

• Ib (Typ) (nA)

  <65, 000

• PWM Rejection

  NO

• VS Min

  3

• VS Max

  5.5

• Iq (Max) (μA)

  1000

• Number of Channels

  2

• Comparator

  0

• Package

  MSOP8