INA181-Q1 Automotive, 26V bi-directional current sense amplifier for cost-sensitive systems | TI.com

INA181-Q1 (ACTIVE) Automotive, 26V bi-directional current sense amplifier for cost-sensitive systems

Automotive, 26V bi-directional current sense amplifier for cost-sensitive systems - INA181-Q1
Datasheet
INAx181-Q1 Automotive, bidirectional, low- and high-side voltage output, current-sense amplifiers datasheet (Rev. B)
 

Description

The INA181-Q1, INA2181-Q1, and INA4181-Q1 (INAx181-Q1) current sense amplifiers are designed for cost-optimized applications. These devices are part of a family of bidirectional, current-sense amplifiers (also called current-shunt monitors) that sense voltage drops across current-sense resistors at common-mode voltages from –0.2 V to +26 V, independent of the supply voltage. The INAx181-Q1 family integrates a matched resistor gain network in four, fixed-gain device options: 20 V/V, 50 V/V, 100 V/V, or 200 V/V. This matched gain resistor network minimizes gain error and reduces the temperature drift.

These devices operate from a single 2.7-V to 5.5-V power supply. The single-channel INA181-Q1 draws a maximum supply current of 260 µA; whereas, the dual-channel INA2181-Q1 draws a maximum supply current of 500 µA, and the quad-channel INA4181-Q1 draws a maximum supply current of 900 µA.

The INA181-Q1 is available in a 6-pin, SOT-23 package. The INA2181-Q1 is available in an 10-pin, VSSOP package. The INA4181-Q1 is available in a 20-pin, TSSOP package. All device options are specified over the extended operating temperature range of –40°C to +125°C.

Features

  • AEC-Q100 qualified for automotive applications
    • Temperature grade 1: –40°C ≤ TA ≤ +125°C
    • HBM ESD classification level 2
    • CDM ESD classification level C6
  • Common-mode range (VCM): –0.2 V to +26 V
  • High bandwidth: 350 kHz (A1 Devices)
  • Offset voltage:
    • ±150 µV (Max) at VCM = 0 V
    • ±500 µV (Max) at VCM = 12 V
  • Output slew rate: 2 V/µs
  • Bidirectional current-sensing capability
  • Accuracy:
    • ±1% gain error (max)
    • 1-µV/°C offset drift (max)
  • Gain options:
    • 20 V/V (A1 devices)
    • 50 V/V (A2 devices)
    • 100 V/V (A3 devices)
    • 200 V/V (A4 devices)
  • Quiescent current: 260 µA max (INA181-Q1)

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INA181-Q1 Error Analysis

0.001m ≤ 
 mOhm ≤ 100m
0.0001 ≤ 
A
A ≤ 100 
2.7 ≤ 
V ≤ 5.5
-0.2 ≤ 
V ≤ 26
-40 ≤ 
C ≤ 125

Parametrics

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Part number Order Common mode voltage (Max) (V) Common mode voltage (Min) (V) Input offset (+/-) (Max) (uV) Input offset drift (+/-) (Typ) (uV/C) Gain (V/V) Gain error (%) Gain error drift (+/-) (Max) (ppm/°C) CMRR (Min) (dB) Bandwidth (kHz) Supply voltage (Max) (V) Supply voltage (Min) (V) Iq (Max) (mA) Number of channels (#) Comparators (#) Features Rating Operating temperature range (C) Package Group Package size: mm2:W x L (PKG)
INA181-Q1 Order now 26     -0.2     150     0.2     100
20
200
50    		 1     20     84     350
210
150
105    		 5.5     2.7     0.3     1     0     Bi-directional
Low-side Capable    		 Automotive     -40 to 125     SOT-23 | 6     6SOT-23: 5 mm2: 1.6 x 2.9 (SOT-23 | 6)    
INA2181-Q1 Order now 26     -0.2     150     0.2     100
20
200
50    		 1     20     84     350
210
150
105    		 5.5     2.7     0.5     2     0     Bi-directional
Dual channel
Low-side Capable    		 Automotive     -40 to 125     VSSOP | 10     10VSSOP: 9 mm2: 3 x 3 (VSSOP | 10)    
INA4181-Q1 Order now 26     -0.2     150     0.2     100
20
200
50    		 1     20     84     350
210
150
105    		 5.5     2.7     1     4     0     Bi-directional
Low-side Capable
Quad channel    		 Automotive     -40 to 125     TSSOP | 20     20TSSOP: 42 mm2: 6.4 x 6.5 (TSSOP | 20)