1 Features
• Wide temperature range: –40°C to +125°C
• Ratio = RIN : RG, RIN = 10kΩ (nominal)
• Highly precise ratio tolerance: ±0.05% (maximum)
• Low drift: ±2ppm/°C TCRratio (maximum)

2 Applications
• Precision voltage divider, precision level translation
• Amplifier gain and attenuation configuration
• Discrete difference and instrumentation amplifier
implementations with high CMRR and gain
accuracy
• Accurate gain setting for fully differential amplifiers
• Pinpoint comparator threshold setting

3 Description
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).