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ADS1291IRSMT

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Texas Instruments Analog Front End (AFEs), VQFN-32(4x4). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

componentdata convertersads1291irsmtfactory-2.0.0extractor-text

Verified ADS1291IRSMT

by Ray · last 31 Oct 2026 · 1 record · files match
SymbolFootprint3D modelPins

Verification log 1 record

31 Oct 2026RayPublished by the parts factory: tier mfr, 33 pinsfiles match
SymbolFootprint3D modelPinsfor all variants
  • ✓component-page-verify: PASS
  • ✓cad_props: Datasheet, MPN and distributor properties match page.json
  • ✓component: ADS1291IRSMT · VQFN-32(4x4) · 33 pins
  • ✓copper: 33 copper pads, none touching another net
  • ✓datasheet: all 33 pin names found in the 79-page datasheet
  • ✓distributor: lcsc C2651548, digikey 296-35022-2-ND, mouser 595-ADS1291IRSMT
  • ✓family: QFN-32-1EP_4x4mm_P0.4mm_EP2.9x2.9mm
  • ✓files: 7 declared files present
  • ✓hero: docs/hero.png 4000x2500
  • ✓lbr: OK: /tmp/cpv-r7p_59hn/x.lbr is a valid EAGLE .lbr with complete deviceset
  • ✓license: CC-BY-SA-4.0
  • ✓models_3d: 2 records
  • •package_fit (skip): no component.package_dims on the page: the model is unchecked against the datasheet drawing
  • ✓pads: 33 pins = 33 pads
  • ✓pose: 2 STEP(s) Z-up, seated, centred
  • ✓symbol: 33 pins agree
  • ✓visibility: public, source open
Evidencedatasheet
Verified files✓ ads1291irsmt.kicad_sym✓ ads1291irsmt.kicad_mod✓ ads1291irsmt.step
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Datasheet

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Contents

README

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ADS1291IRSMT

Texas Instruments · Analog Front End (AFEs) · VQFN-32(4x4)

ADS1291IRSMT from Texas Instruments, in a VQFN-32(4x4). 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 analog output.
2 PGA1P output PGA1 noninverting analog 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 analog output.
8 PGA2P output PGA2 noninverting analog output.
9 VREFP bidirectional Positive reference voltage (analog input/output).
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 relative to AVSS.
13 AVSS power_in Analog ground.
14 CLKSEL input Master clock select (digital input).
15 PWDN/RESET input Power-down or system reset, active low.
16 START input Start conversion (digital input).
17 CLK input Master clock input.
18 CS input SPI chip select.
19 DIN input SPI data in.
20 SCLK input SPI clock.
21 DOUT output SPI data out.
22 DRDY output Data ready, active low.
23 DVDD power_in Digital power supply, 1.7 V to 3.6 V relative to DGND.
24 DGND power_in Digital ground.
25 GPIO2/RCLK2 bidirectional General-purpose I/O 2 or respiration clock 2 (ADS1292R).
26 GPIO1/RCLK1 bidirectional General-purpose I/O 1 or respiration clock 1 (ADS1292R).
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); connect to AVDD if unused.
32 RESP_MODN/IN3N bidirectional N-side respiration excitation signal (analog output) or auxiliary input 3N (analog input); connect to AVDD if unused.
33 Thermal Pad power_in Thermal pad; must be connected to AVSS.

Key specifications

Parameter Value
Manufacturer Texas Instruments
Package VQFN-32(4x4)
Category Data Converters
Pins 33

CAD (KiCad official)

  • Symbol: ADS1291IRSMT
  • Footprint: Package_DFN_QFN:QFN-32-1EP_4x4mm_P0.4mm_EP2.9x2.9mm
  • 3D model: VQFN-32(4x4) (KiCad packages3D, STEP)
  • 3D model files: ads1291irsmt-etched.step / ads1291irsmt-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); ads1291irsmt.step / ads1291irsmt.glb are the bare package body.

Provenance

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

  • Datasheet: Texas Instruments datasheet (79 pp, sha256 d2926c2b261f0606, retrieved 2026-10-31, tier: manufacturer)
  • 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-sonnet-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