Specifications
| Type | Description |
|---|---|
| Part Number | INA191 |
| Manufacturer | Texas Instruments |
| Product Type | Operational Amplifier |
| Category | Signal Chain |
| Inferred Category | Signal_Chain |
| Component Type | Other |
| Package Case | DSBGA-6, 1.17 mm x 0.765 mm |
| Supply Voltage Range | 1.7 V to 5.5 V; Operating supply voltage |
| Shutdown Current | 100 nA max; INA191 disabled |
| Quiescent Current | 43 uA; INA191, TA = 25 degC |
| Input Bias Current Feature | 100 pA typical; Low input bias current feature |
| Common-Mode Voltage Range | -0.2 V to +40 V; Current sensing common-mode range, independent of supply voltage |
| Gain Options | 25 V/V, 50 V/V, 100 V/V, 200 V/V, 500 V/V; Fixed gain variants INA191A1 to INA191A5 |
| Gain Error | +/-0.25% max; A2 to A5 devices |
| Gain Drift | 7 ppm/degC max; Over temperature |
| Offset Voltage Feature | +/-12 uV max; Input-referred |
| Offset Drift Feature | 0.13 uV/degC max; Input-referred offset drift |
| Operating Temperature Range | -40 degC to +125 degC; Specified operating temperature range |
| Package | DSBGA-6; INA191 package |
| Package Body Size | 1.17 mm x 0.765 mm; INA191 DSBGA package nominal body size |
| Package Area | 0.895 mm2; INA191 DSBGA package |
| Enable Pin Function | Driven to VS enables device; driven to GND disables device and places output high impedance |
| OUT Pin Function | Analog voltage output equal to amplified voltage difference from IN+ to IN- |
| Absolute Maximum Supply Voltage | 6 V max; VS supply voltage |
| Absolute Maximum Differential Input Voltage | -42 V to +42 V; VIN+ - VIN- |
| Absolute Maximum Input Pin Voltage | GND - 0.3 V to 42 V; VIN+ and VIN- with respect to GND |
| Absolute Maximum Enable Voltage | GND - 0.3 V to 6 V; VENABLE |
| Absolute Maximum OUT Voltage | GND - 0.3 V to VS + 0.3 V; OUT pin |
| Absolute Maximum Input Current | 5 mA; Input current into any pin |
| Absolute Maximum Operating Temperature | -55 degC to +150 degC; TA operating temperature stress rating |
| Junction Temperature | 150 degC max; Absolute maximum TJ |
| Storage Temperature | -65 degC to +150 degC; Tstg |
| HBM ESD Rating | +/-2000 V; Human-body model per ANSI/ESDA/JEDEC JS-001 |
| CDM ESD Rating | +/-1000 V; Charged-device model per JEDEC JESD22-C101 |
| Recommended Common-Mode Input Range | -0.2 V to 40 V; VCM over operating free-air temperature range |
| Recommended Input Pin Voltage Range | -0.2 V to 40 V; VIN+ and VIN- over operating free-air temperature range |
| Reference Pin Voltage Range | 0 V to VS; VREF, INA2191 reference input |
| Junction-to-Ambient Thermal Resistance | 141.4 degC/W; INA191 YFD DSBGA 6-pin package |
| Junction-to-Case Top Thermal Resistance | 1.1 degC/W; INA191 YFD DSBGA 6-pin package |
| Junction-to-Board Thermal Resistance | 45.7 degC/W; INA191 YFD DSBGA 6-pin package |
| Common-Mode Rejection Ratio | 132 dB min, 150 dB typ; RTI, VIN+ = -0.1 V to 40 V, TA = -40 degC to +125 degC |
| Offset Voltage | -2.5 uV typ, +/-12 uV max; RTI, VS = 1.8 V, TA = 25 degC |
| Offset Drift | 10 nV/degC typ, 130 nV/degC max; RTI, TA = -40 degC to +125 degC |
| Power-Supply Rejection Ratio | -1 uV/V typ, +/-5 uV/V max; RTI, VS = 1.7 V to 5.5 V |
| Input Bias Current | 0.1 nA typ, 3 nA max; VSENSE = 0 mV |
| Input Offset Current | +/-0.07 nA typ; VSENSE = 0 mV |
| A1 Gain | 25 V/V; INA191A1 device |
| A2 Gain | 50 V/V; INA191A2 device |
| A3 Gain | 100 V/V; INA191A3 device |
| A4 Gain | 200 V/V; INA191A4 device |
| A5 Gain | 500 V/V; INA191A5 device |
| A1 Gain Error | -0.17% typ, +/-0.35% max; INA191 A1 devices, VOUT = 0.1 V to VS - truncated condition in provided text |
| Datasheet Status | request_only |
Product Overview
The INA191 is a Texas Instruments current sense amplifier for Signal_Chain designs that require amplified measurement of the voltage difference from IN+ to IN-. Its OUT pin provides an analog voltage output equal to the amplified input differential voltage, and the ENABLE pin allows the device to be enabled from VS or disabled to GND with the output placed in a high-impedance state.
The device operates from a 1.7 V to 5.5 V supply while supporting a -0.2 V to +40 V common-mode sensing range. Available fixed-gain variants include INA191A1 through INA191A5 with gains of 25 V/V, 50 V/V, 100 V/V, 200 V/V, and 500 V/V. Accuracy-related parameters include input-referred offset voltage of +/-12 uV maximum, offset drift of 0.13 uV/degC maximum, and gain drift of 7 ppm/degC maximum.
INA191 is supplied in a 6-pin DSBGA package measuring 1.17 mm x 0.765 mm with 0.895 mm2 package area. The specified operating temperature range is -40 degC to +125 degC, with absolute maximum junction temperature rated to 150 degC.
Key Features
- 1.7 V to 5.5 V operating supply range
- 100 nA maximum shutdown current when disabled
- 43 uA quiescent current at TA = 25 degC
- -0.2 V to +40 V common-mode sensing range
- Fixed gains from 25 V/V to 500 V/V
- +/-12 uV maximum input-referred offset voltage
- 7 ppm/degC maximum gain drift over temperature
- DSBGA-6 package with 0.895 mm2 area
- Enable pin supports high-impedance disabled output
- Specified operation from -40 degC to +125 degC
Typical Applications
- Low-power current sensing
- High common-mode current measurement
- Space-constrained current monitoring
- Enable-controlled measurement nodes
- Signal-chain current measurement
- Wide-temperature current sensing
Procurement Notes
When requesting a quote for INA191, buyers should confirm the manufacturer, package or case, required quantity, target date code, compliance documents, packing method, destination country and expected delivery schedule.
If alternatives are acceptable, buyers should share the approved vendor list, required electrical or optical limits, package constraints and qualification requirements. Any alternative part should be reviewed by the buyer's engineering team before production use.
For analog and signal-chain sourcing, supply voltage, bandwidth, accuracy, noise level, package, temperature grade, input/output configuration and qualification requirements should be verified before approval.
FAQ
What supply voltage range does INA191 support?
INA191 operates from a 1.7 V to 5.5 V supply voltage range. The extracted datasheet facts also list an absolute maximum VS supply voltage rating of 6 V.
What gain options are available for INA191?
INA191 fixed-gain variants cover 25 V/V, 50 V/V, 100 V/V, 200 V/V, and 500 V/V. The listed variants are INA191A1 through INA191A5.
What package is used for the INA191?
INA191 is provided in a DSBGA-6 package. The nominal body size is 1.17 mm x 0.765 mm, and the listed package area is 0.895 mm2.
What happens when the INA191 enable pin is disabled?
The ENABLE pin enables the device when driven to VS. When driven to GND, it disables the INA191 and places the output in a high-impedance state.
Technical Review & Sourcing Note
Prepared by LDeepAI Component Sourcing Team. Reviewed for RFQ, documentation and alternative sourcing use. Last updated: July 7, 2026.
This page is based on manufacturer datasheet information and LDeepAI sourcing review. Specifications should be verified against the official manufacturer datasheet before final procurement or design approval. Final electrical, optical and reliability approval should be confirmed by the buyer's engineering team.