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).