Key Selection Information
| Selection Parameter | Confirmed Information |
|---|---|
| Offset Voltage | 10 µV typical, 35 µV maximum |
| Input Noise | 7 nV/√Hz |
| Bandwidth | 4.7 MHz at G=1; 290 kHz at G=100 |
| Gain Range | 1 V/V to 10,000 V/V |
| CMRR | 112 dB minimum at G=10 stated feature |
| Supply | 4.5 V to 36 V or ±2.25 V to ±18 V |
| Input Protection | ±40 V; stable with 1 nF capacitive load |
| Exact Package / Packing | SOIC (D), 8 pins; 2500-piece large tape and reel |
Product Overview
INA821IDR uses the same low-noise, high-precision INA821 signal path in a conventional SOIC-8 package. It provides 35 µV maximum offset, 7 nV/√Hz noise and 4.7 MHz G=1 bandwidth across a wide 4.5 V to 36 V supply range.
The larger SOIC package is often preferred where automated optical inspection, manual probing, prototype modification or conservative creepage/assembly rules matter more than board density. That makes IDR a production-format choice rather than a change in amplifier transfer function versus the DGKR option.
For industrial data acquisition, the combination of ±40 V input protection, wide supply range and stable operation with capacitive loads gives useful interface margin, but the amplifier still needs correct REF drive and common-mode/output headroom.
For related devices, see HKEQGOO’s Instrumentation Amplifiers category.
Technical Specifications
| Parameter | Verified Information |
|---|---|
| Manufacturer | Texas Instruments |
| Exact MPN | INA821IDR |
| Offset Voltage | 10 µV typical, 35 µV maximum |
| Input Noise | 7 nV/√Hz |
| Bandwidth | 4.7 MHz at G=1; 290 kHz at G=100 |
| Gain Range | 1 V/V to 10,000 V/V |
| CMRR | 112 dB minimum at G=10 stated feature |
| Supply | 4.5 V to 36 V or ±2.25 V to ±18 V |
| Input Protection | ±40 V; stable with 1 nF capacitive load |
| Exact Package / Packing | SOIC (D), 8 pins; 2500-piece large tape and reel |
| Manufacturer Status | Active / Production |
| Part Marking | INA821 |
Functional Highlights
SOIC favors serviceability and manufacturing margin
Visible, wider-spaced leads simplify inspection, probing and rework. In long-life industrial instrumentation, that can outweigh the footprint savings of a VSSOP or SON package.
Electrical performance still requires precision PCB practice
Low offset and high CMRR can be degraded by thermocouple junctions, leakage, unequal input impedance and poor RG routing even though the package is easier to assemble.
Design Considerations
- Use symmetric input routing and low-thermal-EMF connections for microvolt-level accuracy.
- Drive REF with low impedance to avoid degrading CMRR and output accuracy.
- Choose SOIC intentionally if production/service requirements justify its larger board area.
Product Status and Exact Order Code
Manufacturer status: Active / Production
Texas Instruments lists INA821IDR as Active / Production; SOIC (D), 8 pins; 2500-piece large tape and reel; Level-2-260C-1 YEAR; −40°C to +125°C; marking INA821.
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.
Request a Quote
To request a quotation, provide the manufacturer part number, required quantity, destination, target Date Code if applicable, and any testing or inspection requirements.
