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RES21A

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All-purpose matched thin-film resistor divider network with 10kΩ fixed input

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RES21A

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Product details

Rating Catalog Number of dividers 2 Divider ratio 1:1, 1:1.667, 1:10, 1:2.5, 1:4, 1:9 Input resistance (kΩ) 10 Gain resistance (kΩ) 10, 16.67, 25, 40, 90, 100 Initial ratio tolerance (typ) (ppm) ±120 Initial ratio tolerance (max) (ppm) ±500 Total Divider Voltage (max) (V) 85 Matching Tolerance (max) (ppm) -1000 Matching Tolerance (typ) (ppm) -85 Operating temperature range (°C) -40 to 125
Rating Catalog Number of dividers 2 Divider ratio 1:1, 1:1.667, 1:10, 1:2.5, 1:4, 1:9 Input resistance (kΩ) 10 Gain resistance (kΩ) 10, 16.67, 25, 40, 90, 100 Initial ratio tolerance (typ) (ppm) ±120 Initial ratio tolerance (max) (ppm) ±500 Total Divider Voltage (max) (V) 85 Matching Tolerance (max) (ppm) -1000 Matching Tolerance (typ) (ppm) -85 Operating temperature range (°C) -40 to 125
SOT-23-THN (DDF) 8 8.12 mm² 2.9 x 2.8
  • 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)
  • 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)

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).

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).
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* Data sheet RES21A Matched, Thin-Film Resistor Dividers With 10kΩ Inputs datasheet PDF | HTML 14 Nov 2025

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

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Simulation model

RES11A, RES21A and RES31A TINA-TI Reference Design (Rev. B)

SLPM360B.TSC (485 KB) - TINA-TI Reference Design
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Simulation model

RES21A PSpice Model

SLPM368.ZIP (40 KB) - PSpice Model
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Simulation model

RES21A SPICE Model

SLPM369.ZIP (4 KB) - TISpice Model
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Simulation model

RES21A TINA-TI Reference Design

SLPM371.TSC (469 KB) - TINA-TI Reference Design
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Simulation model

RES21A TINA-TI SPICE Model

SLPM370.ZIP (10 KB) - TINA-TI Spice Model
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