1 Features

• Wide temperature range: –40°C to +125°C

• Ratio = RIN : RG, RIN = 100kΩ (nominal)

• Highly precise ratio tolerance: ±0.05% (maximum)

• Low drift over temperature range:

– +2/–5ppm/°C max TCRratio for RES31A00

(±2ppm/°C max TCRratio from –40°C to +105°C)

– ±2ppm/°C max TCRratio for other ratios

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

• Pinpoint comparator threshold setting

3 Description

The RES31A 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 100kΩ,

supporting higher divider voltages than the RES11A

but with a lower current draw than the RES21A , and

is available in several nominal ratios to meet a wide

array of system needs. Use the RES31A 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 RES31A series features high ratio-matching

precision, with the measured ratio of each divider

within 0.05% (±500ppm) (typical) of the nominal. This

precision is maintained over the temperature range.

The RES31A 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).