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ADS1291IPBSR

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Texas Instruments Analog Front End (AFE), TQFP-32(5x5). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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3D Model

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Symbol & Footprint

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Datasheet

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Contents

README

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ADS1291IPBSR

Texas Instruments · Analog Front End (AFE) · TQFP-32(5x5)

ADS1291IPBSR from Texas Instruments, in a TQFP-32(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 PGA1N output PGA1 inverting output.
2 PGA1P output PGA1 noninverting output.
3 IN1N input Differential analog negative input 1; connect to AVDD if unused.
4 IN1P input Differential analog positive input 1; connect to AVDD if unused.
5 IN2N input Differential analog negative input 2; connect to AVDD if unused.
6 IN2P input Differential analog positive input 2; connect to AVDD if unused.
7 PGA2N output PGA2 inverting output.
8 PGA2P output PGA2 noninverting output.
9 VREFP bidirectional Positive reference voltage (analog input/output pin).
10 VREFN input Negative reference voltage; must be connected to AVSS.
11 VCAP1 passive Analog bypass capacitor connection.
12 AVDD power_in Analog supply, 2.7 V to 5.25 V referenced to AVSS.
13 AVSS power_in Analog ground; also the required connection for the thermal pad and VREFN.
14 CLKSEL input Master clock select.
15 PWDN/RESET input Power-down or system reset, active low.
16 START input Start conversion.
17 CLK input Master clock input.
18 CS input SPI chip select.
19 DIN input SPI data input.
20 SCLK input SPI serial clock.
21 DOUT output SPI data output.
22 DRDY output Data ready, active low.
23 DVDD power_in Digital power supply, 1.7 V to 3.6 V referenced to DGND.
24 DGND power_in Digital ground.
25 GPIO2/RCLK2 bidirectional General-purpose I/O 2, or respiration clock 2 (ADS1292R only).
26 GPIO1/RCLK1 bidirectional General-purpose I/O 1, or respiration clock 1 (ADS1292R only).
27 VCAP2 passive Analog bypass capacitor connection.
28 RLDINV input Right leg drive inverting input; connect to AVDD if not used.
29 RLDIN/RLDREF input Right leg drive input to MUX or RLD amplifier noninverting input; connect to AVDD if not used.
30 RLDOUT output Right leg drive analog output.
31 RESP_MODP/IN3P bidirectional P-side respiration excitation signal (analog output) or auxiliary input 3P (analog input); respiration function is ADS1292R only.
32 RESP_MODN/IN3N bidirectional N-side respiration excitation signal (analog output) or auxiliary input 3N (analog input); respiration function is ADS1292R only.

Key specifications

Parameter Value
Manufacturer Texas Instruments
Package TQFP-32(5x5)
Category Data Acquisition
Pins 32

CAD (KiCad official)

  • Symbol: ADS1291IPBSR
  • Footprint: Package_QFP:TQFP-32_5x5mm_P0.5mm
  • 3D model: TQFP-32(5x5), generated from the KiCad footprint (body from the F.Fab outline, terminals on the pads, 1.1 mm nominal TQFP height). Neither the vendor nor KiCad ships a 3D model for this package, so the dimensions are nominal, not the manufacturer's CAD (STEP)
  • 3D model files: ads1291ipbsr-etched.step / ads1291ipbsr-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); ads1291ipbsr.step / ads1291ipbsr.glb are the bare package body.

Provenance

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

  • Datasheet: Texas Instruments datasheet (83 pp, sha256 82b2aac52bf182df, 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