1 Features
• AEC-Q200 Qualified for automotive applications:
– Temperature: –40°C to +125°C
• Ratio = RIN : RG, RIN = 10kΩ (nominal)
• Highly precise ratio tolerance: ±0.05% (maximum)
• Low drift: ±2ppm/°C TCRratio (maximum)
• 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
• Accurate gain setting for fully differential amplifiers
• Pinpoint comparator threshold setting

3 Description
The RES21A-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 10kΩ, supporting higher divider voltages
than the RES11A-Q1, and is available in several
nominal ratios to meet a wide array of system needs.
Use the RES21A-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 RES21A-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,
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-Q1 is automotive qualified under AECQ200
temperature grade 1. The temperature range is
specified 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).