Key Selection Information
| Selection Parameter | Confirmed Information |
|---|---|
| Gain | 50 V/V fixed (A2) |
| Common Mode | −0.2 V to +26 V |
| Supply | 2.7 V to 5.5 V |
| Bandwidth | 210 kHz for A2 |
| Offset Voltage | ±55 µV max at VCM=0 V for A2; ±130 µV max under stated 12 V condition |
| Gain Error | ±0.2% maximum for A2 |
| Package Footprint | SOT-563, about 1.6 mm × 1.6 mm |
| Exact Packing | 4000-piece large tape and reel |
Product Overview
INA185A2IDRLR is a 50 V/V bidirectional current-sense amplifier optimized for space-constrained power and motor-control designs. The SOT-563 body is smaller than SC70 while retaining a REF-referenced voltage output and 26 V common-mode capability.
The A2 grade improves gain accuracy and offset versus lower-cost INA181-class options: TI specifies ±0.2% maximum gain error for A2 and ±55 µV maximum offset at VCM=0 V under the stated conditions. Bandwidth for this 50 V/V option is 210 kHz.
The tiny DRL package is the exact value proposition and also the manufacturing constraint. Pad geometry, paste control, inspection capability and Kelvin routing deserve explicit review before substituting it for a larger SOT-23/SC70 current-sense amplifier.
For related devices, see HKEQGOO’s Current Sense Amplifiers category.
Technical Specifications
| Parameter | Verified Information |
|---|---|
| Manufacturer | Texas Instruments |
| Exact MPN | INA185A2IDRLR |
| Gain | 50 V/V fixed (A2) |
| Common Mode | −0.2 V to +26 V |
| Supply | 2.7 V to 5.5 V |
| Bandwidth | 210 kHz for A2 |
| Offset Voltage | ±55 µV max at VCM=0 V for A2; ±130 µV max under stated 12 V condition |
| Gain Error | ±0.2% maximum for A2 |
| Package Footprint | SOT-563, about 1.6 mm × 1.6 mm |
| Exact Packing | 4000-piece large tape and reel |
| Manufacturer Status | Active / Production |
| Part Marking | 1DW |
Functional Highlights
Precision is improved without increasing package area
The A2 option combines 50 V/V gain with tighter gain error and low offset in a 1.6 mm body, allowing lower shunt loss while retaining useful ADC resolution.
The smallest package is not automatically the easiest drop-in
SOT-563 can reduce footprint by roughly 39% versus SC70, but assembly yield and rework visibility depend more on the board process. A package migration should be treated as a PCB/manufacturing change.
Design Considerations
- Confirm the assembler supports SOT-563 land pattern, stencil and inspection requirements.
- Use Kelvin shunt traces; small package size does not eliminate copper-resistance error.
- Set REF and output headroom for both current directions before finalizing RSENSE.
Product Status and Exact Order Code
Manufacturer status: Active / Production
Texas Instruments lists INA185A2IDRLR as Active / Production; SOT-5X3 (DRL), 6 pins; 4000-piece large tape and reel; Level-1-260C-UNLIM; −40°C to +125°C; marking 1DW.
Related Engineering Resources
Quality & Verification Support
Third-party inspection or testing can be arranged according to customer requirements. Testing fees are borne by the buyer. Additional verification requirements can be discussed before shipment. After an order is placed, physical product, label, packaging, and Date Code photos may be provided where appropriate.
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