Specifications
| Type | Description |
|---|---|
| Part Number | INA185 |
| Manufacturer | Texas Instruments |
| Product Type | Operational Amplifier |
| Category | Signal Chain |
| Package / Case | DRL SOT-563 6-pin, 1.60 mm x 1.60 mm; DCK SC70 6-pin, 2.00 mm x 2.10 mm |
| Common-mode input voltage range | -0.2 V to +26 V; recommended operating condition over operating free-air temperature range |
| Operating supply voltage | 2.7 V to 5.5 V, 5 V nominal; recommended operating condition over operating free-air temperature range |
| Operating free-air temperature | -40°C to +125°C; recommended operating condition |
| Supply voltage absolute maximum | 6 V max; absolute maximum rating over operating free-air temperature range |
| Differential analog input voltage absolute maximum | -26 V to +26 V; VIN+ - VIN- absolute maximum rating |
| Common-mode analog input voltage absolute maximum | GND - 0.3 V to 26 V; absolute maximum rating |
| Reference voltage absolute maximum | GND - 0.3 V to VS + 0.3 V; VREF absolute maximum rating |
| Output voltage absolute maximum | GND - 0.3 V to VS + 0.3 V; VOUT absolute maximum rating |
| Operating temperature absolute maximum | -55°C to +150°C; TA absolute maximum rating |
| Junction temperature absolute maximum | 150°C max; TJ absolute maximum rating |
| Storage temperature | -65°C to +150°C; absolute maximum rating |
| ESD rating HBM | ±3000 V; human-body model per ANSI/ESDA/JEDEC JS-001 |
| ESD rating CDM | ±1000 V; charged-device model per JEDEC JESD22-C101 |
| Junction-to-ambient thermal resistance | 188.0°C/W DCK; 230.9°C/W DRL; RθJA, 6-pin packages |
| Junction-to-case top thermal resistance | 140.8°C/W DCK; 94.1°C/W DRL; RθJC(top), 6-pin packages |
| Junction-to-board thermal resistance | 78.8°C/W DCK; 112.8°C/W DRL; RθJB, 6-pin packages |
| Junction-to-top characterization parameter | 62.1°C/W DCK; 3.8°C/W DRL; ψJT, 6-pin packages |
| Junction-to-board characterization parameter | 78.5°C/W DCK; 112.1°C/W DRL; ψJB, 6-pin packages |
| Common-mode rejection ratio A1 | 86 dB min, 100 dB typ; VIN+ = 0 V to 26 V, VSENSE = 0 mV, TA = -40°C to +125°C, RTI |
| Common-mode rejection ratio A2/A3 | 96 dB min, 100 dB typ; VIN+ = 0 V to 26 V, VSENSE = 0 mV, TA = -40°C to +125°C, RTI |
| Common-mode rejection ratio A4 | 106 dB min, 120 dB typ; VIN+ = 0 V to 26 V, VSENSE = 0 mV, TA = -40°C to +125°C, RTI |
| Offset voltage A1 at zero common-mode | ±25 µV typ, ±135 µV max; VSENSE = 0 mV, VIN+ = 0 V, RTI |
| Offset voltage A2/A3/A4 at zero common-mode | ±5 µV typ, ±55 µV max; VSENSE = 0 mV, VIN+ = 0 V, RTI |
| Offset voltage A1 at 12 V common-mode | ±100 µV typ, ±450 µV max; VSENSE = 0 mV, VIN+ = 12 V, RTI |
| Offset voltage A2/A3 at 12 V common-mode | ±25 µV typ, ±130 µV max; VSENSE = 0 mV, VIN+ = 12 V, RTI |
| Offset voltage A4 at 12 V common-mode | ±25 µV typ, ±100 µV max; VSENSE = 0 mV, VIN+ = 12 V, RTI |
| Offset voltage drift | 0.2 µV/°C typ, 0.5 µV/°C max; VSENSE = 0 mV, TA = -40°C to +125°C, RTI |
| Power supply rejection ratio | ±8 µV/V typ, ±30 µV/V max; VS = 2.7 V to 5.5 V, VIN+ = 12 V, VSENSE = 0 mV, RTI |
| Input bias current at VCM = 0 V | -6 µA typ; VSENSE = 0 mV, VCM = 0 V |
| Input bias current | 75 µA typ; VSENSE = 0 mV |
| Input offset current | ±0.05 µA typ; VSENSE = 0 mV |
| Gain A1 | 20 V/V; A1 device option |
| Gain A2 | 50 V/V; A2 device option |
| Gain A3 | 100 V/V; A3 device option |
| Gain A4 | 200 V/V; A4 device option |
| Gain error A1/A2/A3 | ±0.05% typ, ±0.2% max; VOUT = 0.5 V to VS - 0.5 V, TA = -40°C to +125°C |
| Gain error A4 | ±0.07% typ, ±0.25% max; VOUT = 0.5 V to VS - 0.5 V, TA = -40°C to +125°C |
| Gain error drift | 1.5 ppm/°C typ, 8 ppm/°C max; TA = -40°C to +125°C |
| Nonlinearity error | ±0.01% typ; VOUT = 0.5 V to VS - 0.5 V |
| Maximum capacitive load | 1 nF; no sustained oscillation |
| Output swing to VS | VS - 0.02 V typ, VS - 0.026 V max; RL = 10 kΩ to GND, TA = -40°C to +125°C |
| Output swing to GND | GND + 0.0005 V typ, GND + 0.0035 V max; RL = 10 kΩ to GND, VIN+ - VIN- = -10 mV, TA = -40°C to +125°C |
| Zero current swing to GND A1 | GND + 0.0005 V typ, GND + 0.006 V max; VREF = 0 V, RLOAD open, VIN+ - VIN- = 0 mV, TA = -40°C to +125°C |
| Zero current swing to GND A2/A3/A4 | GND + 0.0005 V typ, GND + 0.012 V max; VREF = 0 V, RLOAD open, VIN+ - VIN- = 0 mV, TA = -40°C to +125°C |
| Bandwidth A1 | 350 kHz typ; CLOAD = 10 pF |
| Bandwidth A2 | 210 kHz typ; CLOAD = 10 pF |
| Bandwidth A3 | 150 kHz typ; CLOAD = 10 pF |
| Bandwidth A4 | 105 kHz typ; CLOAD = 10 pF |
| Slew rate | 2 V/µs typ; VS = 5 V, VREF = VS/2, VIN+ = 12 V, TA = 25°C unless otherwise noted |
| Voltage noise density | 40 nV/√Hz typ; referred to input |
| Quiescent current | 200 µA typ, 260 µA max; VSENSE = 0 mV |
| Quiescent current over temperature | 300 µA max; VSENSE = 0 mV, TA = -40°C to +125°C |
| Pin 1 function SOT-563 | OUT, analog output; DRL package 6-pin SOT-563 top view |
| Pin 6 function SOT-563 | VS, analog power supply, 2.7 V to 5.5 V; DRL package 6-pin SOT-563 top view |
| Pin 5 function SOT-563 | REF, analog input reference; DRL package 6-pin SOT-563 top view |
| Datasheet Status | request_only |
Product Overview
The INA185 from Texas Instruments is a bidirectional current sense amplifier for Signal_Chain designs. Its recommended operating range supports -0.2 V to +26 V common-mode input voltage and a 2.7 V to 5.5 V supply, with 5 V listed as nominal. The operating free-air temperature range is -40°C to +125°C.
Device options provide fixed gains of 20 V/V, 50 V/V, 100 V/V, and 200 V/V. Electrical limits include low offset voltage options, 0.2 µV/°C typical offset drift, 1.5 ppm/°C typical gain error drift, ±0.01% typical nonlinearity error, and 40 nV/√Hz typical input-referred voltage noise density.
Package choices include the DRL 6-pin SOT-563 at 1.60 mm x 1.60 mm and the DCK 6-pin SC70 at 2.00 mm x 2.10 mm. Documented pins for the SOT-563 include OUT, VS, and REF, supporting analog output, 2.7 V to 5.5 V supply, and analog input reference functions.
Key Features
- Bidirectional current sense amplifier for Signal_Chain designs
- Common-mode input range from -0.2 V to +26 V
- Operates from 2.7 V to 5.5 V supply
- -40°C to +125°C operating free-air temperature range
- Four gain options: 20, 50, 100, and 200 V/V
- Typical bandwidth from 105 kHz to 350 kHz by gain
- 200 µA typical quiescent current at zero sense voltage
- Available in 6-pin SOT-563 and SC70 packages
Typical Applications
- Bidirectional current monitoring
- High-side current sensing
- Low-side current sensing
- Supply current measurement
- Load current feedback
- Reference-based current measurement
Procurement Notes
When requesting a quote for INA185, 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 the INA185 support?
The INA185 operates from a 2.7 V to 5.5 V supply, with 5 V listed as nominal. The supply voltage absolute maximum rating is 6 V over the operating free-air temperature range.
Which gain options are available for the INA185?
The INA185 device options provide fixed gains of 20 V/V for A1, 50 V/V for A2, 100 V/V for A3, and 200 V/V for A4.
What packages are listed for the INA185?
The INA185 package options are DRL SOT-563 6-pin at 1.60 mm x 1.60 mm and DCK SC70 6-pin at 2.00 mm x 2.10 mm.
What is the INA185 common-mode input voltage range?
The recommended common-mode input voltage range is -0.2 V to +26 V over the operating free-air temperature range. The common-mode analog input absolute maximum rating is GND - 0.3 V to 26 V.
Technical Review & Sourcing Note
Prepared by LDeepAI Component Sourcing Team. Reviewed for RFQ, documentation and alternative sourcing use. Last updated: July 12, 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.