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ADS1261BIRHBT

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Texas Instruments Analog To Digital Converters (ADCs), VQFN-32-EP(5x5). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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ADS1261BIRHBT

Texas Instruments · Analog To Digital Converters (ADCs) · VQFN-32-EP(5x5)

ADS1261BIRHBT from Texas Instruments, in a VQFN-32-EP(5x5). Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 AINCOM bidirectional Analog input common, also usable as the IDAC1, IDAC2 and VBIAS connection.
2 CAPP output PGA output P; connect a 4.7-nF C0G dielectric capacitor across CAPP and CAPN.
3 CAPN output PGA output N; connect a 4.7-nF C0G dielectric capacitor across CAPP and CAPN.
4 AVDD power_in Positive analog power supply; AVDD to AVSS absolute maximum is 7 V.
5 AVSS power_in Negative analog power supply; also the connection point for the exposed thermal pad.
6 REFOUT output Internal 2.5-V reference output; connect a 10-µF capacitor to AVSS.
7 PWDN input Power-down control input, active low.
8 RESET input Reset input, active low.
9 START input Start conversion control input, active high.
10 CS input Serial interface chip select, active low; must remain low for the entire data transaction.
11 SCLK input Serial interface shift clock input; Schmitt-triggered input that should be kept noise-free.
12 DIN input Serial interface data input; data are latched on the falling edge of SCLK.
13 DRDY output Data ready indicator output, active low.
14 DOUT/DRDY output Dual-function serial data output and active-low data ready indicator; high-impedance when CS is high.
15 BYPASS output Internal subregulator bypass; connect a 1-µF capacitor to DGND.
16 DGND power_in Digital ground.
17 DVDD power_in Digital power supply; DVDD to DGND absolute maximum is 7 V.
18 CLKIN input Connect to DGND for the internal oscillator, or drive with an external clock input.
19 NC unconnected No connection; electrically float or connect to DGND.
20 NC unconnected No connection; electrically float or connect to DGND.
21 NC unconnected No connection; electrically float or connect to DGND.
22 NC unconnected No connection; electrically float or connect to DGND.
23 AIN9 bidirectional Analog input 9, also usable as IDAC1 and IDAC2 connection.
24 AIN8 bidirectional Analog input 8, also usable as IDAC1 and IDAC2 connection.
25 AIN7 bidirectional Analog input 7, also usable as IDAC1 and IDAC2 connection.
26 AIN6 bidirectional Analog input 6, also usable as IDAC1 and IDAC2 connection.
27 AIN5 bidirectional Analog input 5, also usable as IDAC1/IDAC2, GPIO3 and ACX2.
28 AIN4 bidirectional Analog input 4, also usable as IDAC1/IDAC2, GPIO2 and ACX1.
29 AIN3 bidirectional Analog input 3, also usable as IDAC1/IDAC2, REFN1, GPIO1 and ACX2.
30 AIN2 bidirectional Analog input 2, also usable as IDAC1/IDAC2, REFP1, GPIO0 and ACX1.
31 AIN1 bidirectional Analog input 1, also usable as IDAC1/IDAC2 and REFN0.
32 AIN0 bidirectional Analog input 0, also usable as IDAC1/IDAC2 and REFP0.
33 Thermal Pad passive Exposed thermal pad; connect to AVSS, and the pad must be soldered for mechanical integrity.

Key specifications

Parameter Value
Manufacturer Texas Instruments
Package VQFN-32-EP(5x5)
Category ADC/DAC/Data Conversion
Pins 33

CAD (KiCad official)

  • Symbol: ADS1261BIRHBT
  • Footprint: Package_DFN_QFN:QFN-32-1EP_5x5mm_P0.5mm_EP3.3x3.3mm
  • 3D model: VQFN-32-EP(5x5) (KiCad packages3D, STEP)
  • 3D model files: ads1261birhbt-etched.step / ads1261birhbt-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); ads1261birhbt.step / ads1261birhbt.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: Texas Instruments datasheet (92 pp, sha256 0369aa88e789386f, retrieved 2026-10-08, tier: lcsc)
  • Datasheet language: Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-haiku-5-5 (text), consensus claude-sonnet-5-5 (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF