1 Features
• AEC-Q200 Qualified for automotive applications:
– Temperature: –40°C to +125°C
• Ratio = RIN : RG, RIN = 100kΩ (nominal)
• Highly precise ratio tolerance: ±0.05% (maximum)
• Low drift:
– +2/–5ppm/°C max TCRratio for RES31A00-Q1
(±2ppm/°C max TCRratio from –40°C to +105°C)
– ±2ppm/°C max TCRratio for other ratios
• Functional safety-capable
– Documentation available to aid functional safety
system design

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-Q1 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-Q1 but with a lower
current draw than the RES21A-Q1 , and is available
in several nominal ratios to meet a wide array of
system needs. Use the RES31A-Q1 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-Q1 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.
The RES31A-Q1 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).