The INA225 is a voltage-output, current-sense amplifier that senses drops across current-sensing resistors at common-mode voltages that can vary from 0 V to 36 V, independent of the supply voltage. The device is a bidirectional, current-shunt monitor that allows an external reference to be used to measure current flowing in both directions across a current-sensing resistor.
Four discrete gain levels are selectable using the two gain-select terminals (GS0 and GS1) to program gains of 25 V/V, 50 V/V, 100 V/V, and 200 V/V. The low-offset, zero-drift architecture and precision gain values enable current-sensing with maximum drops across the shunt as low as 10 mV of full-scale while maintaining very high accuracy measurements over the entire operating temperature range.
The device operates from a single +2.7-V to +36-V power supply, drawing a maximum of 350 µA of supply current. The device is specified over the extended operating temperature range (–40°C to +125°C), and is offered in an MSOP-8 package.
| 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) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| INA225 |
|
36 | 0 | 150 | 0.1 |
100
200 25 50 |
0.15
0.2 0.3 |
10 | 95 |
250
200 125 70 |
36 | 2.7 | 0.35 | 1 | 0 |
Bi-directional
Low-side Capable Programmable Gain |
Catalog | -40 to 125 | VSSOP | 8 | 8VSSOP: 15 mm2: 4.9 x 3 (VSSOP | 8) |
