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ADS1261BQWRHMRQ1

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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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ADS1261BQWRHMRQ1

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

ADS1261BQWRHMRQ1 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 an IDAC1/IDAC2 connection and VBIAS per the datasheet pin table.
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 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; CS must stay low for the entire data transaction.
11 SCLK input Serial interface shift clock; Schmitt-triggered input that should be kept noise-free and terminated near the driver.
12 DIN input Serial interface data input, latched on the falling edge of SCLK.
13 DRDY output Data ready indicator output, asserts active low when conversion data are ready.
14 DOUT/DRDY tri_state Dual-function serial data output and active-low data ready; 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 Clock input: connect to DGND to use the internal oscillator, or connect an external clock source.
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 passive Analog input 9 (ADS1261-Q1), also usable as IDAC1 and IDAC2 output.
24 AIN8 passive Analog input 8 (ADS1261-Q1), also usable as IDAC1 and IDAC2 output.
25 AIN7 passive Analog input 7 (ADS1261-Q1), also usable as IDAC1 and IDAC2 output.
26 AIN6 passive Analog input 6 (ADS1261-Q1), also usable as IDAC1 and IDAC2 output.
27 AIN5 passive Analog input 5 (ADS1261-Q1), also IDAC1/IDAC2 output and alternate GPIO3 and ACX2 function.
28 AIN4 passive Analog input 4 (ADS1261-Q1), also IDAC1/IDAC2 output and alternate GPIO2 and ACX1 function.
29 AIN3 passive Analog input 3 (ADS1261-Q1), also IDAC1/IDAC2 output and alternate REFN1, GPIO1 and ACX2 function.
30 AIN2 passive Analog input 2 (ADS1261-Q1), also IDAC1/IDAC2 output and alternate REFP1, GPIO0 and ACX1 function.
31 AIN1 passive Analog input 1, also IDAC1/IDAC2 output and alternate REFN0 function.
32 AIN0 passive Analog input 0, also IDAC1/IDAC2 output and alternate REFP0 function.
33 Thermal Pad passive Exposed pad (from the footprint; not named in the datasheet pin table).

Key specifications

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

CAD (KiCad official)

  • Symbol: ADS1261BQWRHMRQ1
  • 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: ads1261bqwrhmrq1-etched.step / ads1261bqwrhmrq1-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); ads1261bqwrhmrq1.step / ads1261bqwrhmrq1.glb are the bare package body.

Provenance

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

  • Datasheet: Texas Instruments datasheet (87 pp, sha256 335d3b39e7424be6, 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