The INA181-Q1, INA2181-Q1,and INA4181-Q1 (INAx181-Q1) currentsense amplifiers are designed for cost-optimized applications. These devices are part of a familyof bidirectional, current-sense amplifiers (also called current-shunt monitors) that sense voltagedrops across current-sense resistors at common-mode voltages from –0.2 V to +26 V, independent ofthe supply voltage. The INAx181-Q1 family integrates a matchedresistor gain network in four, fixed-gain device options: 20 V/V, 50 V/V, 100 V/V, or 200 V/V. Thismatched 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-channelINA181-Q1 draws a maximum supply current of 260 µA; whereas, thedual-channel INA2181-Q1 draws a maximum supply current of 500 µA, andthe quad-channel INA4181-Q1 draws a maximum supply current of 900µA.
The INA181-Q1 is available in a 6-pin, SOT-23 package. TheINA2181-Q1 is available in an 10-pin, VSSOP package. The INA4181-Q1 is available in a 20-pin, TSSOP package. All device options arespecified over the extended operating temperature range of –40°C to +125°C.
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Status | ACTIVE |
SubFamily | Current sense amplifiers analog output |
Common mode voltage | 26 |
Rating | Automotive |
Features | Bi-directional^Low-side Capable^Quad channel |
Supply Voltage | 2.7 |
Input offset (+/-) | 150 |
Input offset drift (+/-) | 0.2 |
Gain | 100^20^200^50 |
Gain error | 1 |
CMRR | 84 |
Bandwidth | 350^210^150^105 |
Iq | 1 |
Approx. price | 0.64 | 1ku |
Operating temperature range | -40 to 125 |
Package Group | TSSOP|20 |
Package size: mm2:W x L (PKG) | [pf]20TSSOP[/pf]: 42 mm2: 6.4 x 6.5 (TSSOP|20) |