INA271 Datasheet – Voltage Output Current Shunt Monitor – TI
Voltage Output, Unidirectional Measurement Current-Shunt Monitor
INA271 overview
The INA271 is a Voltage Output, Unidirectional Measurement Current-Shunt Monitor made by Texas Instruments, supplied in an SOIC 8 Pin Type package. The absolute maximum ratings table on this page lists the 8 limits from the manufacturer's datasheet that must not be exceeded. This page brings together the INA271 pinout and maximum ratings, with the full datasheet PDF to preview below or download.
The INA270 and INA271 family of voltage-output, current-sense amplifiers can sense drops across shunt resistors at common-mode voltages from –16 V to +80 V, independent of the supply voltage. The INA270 and INA271 pinouts readily enable filtering.
The INA270 and INA271 are available with two gain options: 14 V/V and 20 V/V. The 130-kHz bandwidth simplifies use in current-control loops.
The INA270 and INA271 operate from a single +2.7-V to +18-V supply, drawing 700 μA (typical) of supply current. The devices are specified over the extended operating temperature range of –40°C to +125°C and are offered in an SOIC-8 package.
Datasheet
INA271 features
- Wide Common-Mode Range: –16 V to +80 V
- CMRR: 120 dB
- Accuracy
- ±0.5-mV Offset (typ)
- ±0.2% Gain Error (typ)
- 2.5 μV/°C Offset Drift (typ)
- 50 ppm/°C Gain Drift (max)
- Bandwidth: Up to 130 kHz
- Two Gain Options Available: 14 V/V (INA270) 20 V/V (INA271)
- 14 V/V (INA270)
- 20 V/V (INA271)
- Quiescent Current: 700 μA (typ)
- Power Supply: +2.7 V to +18 V
- Provision for Filtering
INA271 pinout
| Pin | Name | Description |
|---|---|---|
| 4 | BUF IN | Connect to output of filter from PRE OUT |
| 2 | GND | Ground |
| 1 | IN– | Connect to load side of shunt resistor |
| 8 | IN+ | Connect to supply side of shunt resistor |
| 7 | NC | Connect to ground |
| 5 | OUT | Output voltage |
| 3 | PRE OUT | Connect to input of filter to BUF IN |
| 6 | V+ | Power supply, +2.7 V to +18 V |
Absolute maximum ratings
| Parameter | Value | Unit |
|---|---|---|
| Supply voltage (VS) | Min +18 / V | |
| Analog inputs, VIN+, VIN–: | Min Differential, (VIN+) – (VIN–) / –18 | +18 |
| Common-mode | Min –16 / Max +80 | V |
| Analog output: OUT and PRE OUT pins | Min GND – / 0.3 / Max (V+) + 0.3 | V |
| Input current into any pin | Min 5 / mA | |
| Operating temperature | Min –55 / Max +150 | °C |
| Junction temperature | Min +150 / °C | |
| Storage temperature, Tstg | Min –65 / Max +150 | °C |
INA271 applications
- Power Management
- Automotive
- Telecom Equipment
- Notebook Computers
- Battery Chargers
- Cell Phones
- Welding Equipment
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