0
ACTIVE
Rating |
Catalog |
Number of dividers |
2 |
Divider ratio |
1:1, 1:1.667, 1:10, 1:2.5, 1:4, 1:9 |
Input resistance (kΩ) |
10 |
Gain resistance (kΩ) |
10, 16.67, 25, 40, 90, 100 |
Initial ratio tolerance (typ) (ppm) |
±120 |
Initial ratio tolerance (max) (ppm) |
±500 |
Total Divider Voltage (max) (V) |
85 |
Matching Tolerance (max) (ppm) |
-1000 |
Matching Tolerance (typ) (ppm) |
-85 |
Operating temperature range (°C) |
-40 to 125 |
SOT-23-THN (DDF)-8-8.12 mm² 2.9 x 2.8
Low drift: ±2ppm/°C TCRratio (maximum)
The RES21A is a matched pair of resistive dividers, implemented in thin-film SiCr with Texas Instruments modern, high-performance, analog CMOS process. The device has a nominal input resistance of 10kΩ, supporting higher divider voltages than the RES11A, and is available in several nominal ratios to meet a wide array of system needs. Use the RES21A in an inverse gain configuration by simply rotating the device placement by 180°. This feature supports layout reuse and increases flexibility for applications such as discrete instrumentation or difference amplifier implementations.
The RES21A series features high ratio-matching precision, with the measured ratio of each divider within ±0.05% (±500ppm) of the nominal. This precision is maintained over the temperature range, with a maximum ratio drift of only ±2ppm/°C. Additionally, the biased long-term stability of the device has been proven through thorough characterization.
The RES21A is specified with a temperature range from –40°C to +125°C. The device is offered in an 8‑pin, SOT‑23-THIN package, with a body size of 2.9mm × 1.6mm (body size is a nominal value and does not include pins).
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