Texas Instruments INA229AIDGSR, Current Sense Amplifier, Single Circuit, 640 µA Supply, 2.7 V to 5.5 V Supply, 10-VSSOP Package, -40°C to 125°C Operating Temperature.
| Parameter | Value |
|---|---|
| Mounting | Surface Mount |
| Amplifier type | Current Sense |
| Voltage - input offset | 1 mV |
| Voltage - supply span | 5.5 V |
| Current - supply | 640µA |
| Current - input bias | 100 pA |
| Operating temperature | -40°C ~ 125°C (TA) |
| Package | Tape & Reel (TR); Cut Tape (CT) |
| Case | 10-TFSOP, 10-MSOP (0.118\", 3.00mm Width) |
| Number of circuits | 1 |
It monitors current by sensing the voltage drop across a shunt resistor, outputting a voltage proportional to the load current.
The 2.7 V minimum supply lets it run off a 3.3 V rail with headroom, while the 5.5 V maximum covers 5 V systems without an extra LDO.
A functional alternative is the INA254A1IPWAR, also a current sense amplifier in the same series, but with a 350 kHz bandwidth and zero-drift architecture. The INA4290A2IRGVR offers four channels at 1.1 MHz bandwidth but is a different package and channel count. Neither is a drop-in replacement — verify pinout and gain before substituting.
The INA219 is an I2C-interface digital current/power monitor, while the INA229AIDGSR is an analog-output current sense amplifier. They are not pin-compatible or functionally equivalent for digital bus designs. For an analog-output replacement, check the INA254A1IPWAR or INA4290A2IRGVR if the channel count matches.