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PCM1794ADBR

Public Made by Adom

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Texas Instruments ADCs/DACs - Special Purpose, SSOP-28-208mil. Datasheet-verified pinout, KiCad symbol/footprint/3D.

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Contents

README

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PCM1794ADBR

Texas Instruments · ADCs/DACs - Special Purpose · SSOP-28-208mil

PCM1794ADBR from Texas Instruments, in a SSOP-28-208mil. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 MONO input Monaural mode enable, Schmitt-trigger input, 5-V tolerant
2 CHSL input L-channel (LOW) or R-channel (HIGH) select, Schmitt-trigger input, 5-V tolerant
3 DEM input De-emphasis enable at 44.1 kHz sampling frequency, Schmitt-trigger input, 5-V tolerant
4 LRCK input Left and right clock (fS) serial interface input, Schmitt-trigger input, 5-V tolerant
5 DATA input Serial audio data input, clocked on BCK rising edge, Schmitt-trigger input, 5-V tolerant
6 BCK input Bit clock input for serial data shifting, Schmitt-trigger input, 5-V tolerant
7 SCK input System clock input for digital filter and DAC operation, Schmitt-trigger input, 5-V tolerant
8 DGND power_in Digital ground reference
9 VDD power_in Digital power supply, 3.3 V nominal
10 MUTE input Mute control input, HIGH transitions both outputs to bipolar zero level, Schmitt-trigger input, 5-V tolerant
11 FMT0 input Audio data format select bit 0 (with FMT1), Schmitt-trigger input, 5-V tolerant
12 FMT1 input Audio data format select bit 1 (with FMT0), Schmitt-trigger input, 5-V tolerant
13 ZERO output Zero flag output, goes HIGH when audio input data continuously zero for 1024 LRCKs in PCM mode
14 RST input External reset input, held LOW for minimum 20 ns to initialize device, Schmitt-trigger input, 5-V tolerant
15 VCC2R power_in Analog power supply for R-channel DAC, 5 V nominal
16 AGND3R power_in Analog ground reference for R-channel DAC
17 IOUTR+ output R-channel differential analog current output (positive leg), 7.8 mA peak-to-peak at full scale
18 IOUTR- output R-channel differential analog current output (negative leg), 7.8 mA peak-to-peak at full scale
19 AGND1 power_in Analog ground reference for internal bias circuits
20 IREF passive Output current reference bias pin used for setting DAC output current scale
21 VCOMR passive R-channel internal bias decoupling pin, requires external capacitive decoupling
22 VCOML passive L-channel internal bias decoupling pin, requires external capacitive decoupling
23 VCC1 power_in Analog power supply, 5 V nominal
24 AGND2 power_in Analog ground reference for internal bias circuits
25 IOUTL+ output L-channel differential analog current output (positive leg), 7.8 mA peak-to-peak at full scale
26 IOUTL- output L-channel differential analog current output (negative leg), 7.8 mA peak-to-peak at full scale
27 AGND3L power_in Analog ground reference for L-channel DAC
28 VCC2L power_in Analog power supply for L-channel DAC, 5 V nominal

Key specifications

Parameter Value
Manufacturer Texas Instruments
Package SSOP-28-208mil
Category Data Acquisition
Pins 28

CAD (KiCad official)

  • Symbol: PCM1794ADBR
  • Footprint: Package_SO:SSOP-28_5.3x10.2mm_P0.65mm
  • 3D model: SSOP-28-208mil (KiCad packages3D, STEP)
  • 3D model files: pcm1794adbr-etched.step / pcm1794adbr-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); pcm1794adbr.step / pcm1794adbr.glb are the bare package body.

Provenance

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

  • Datasheet: Texas Instruments datasheet (35 pp, sha256 69e6ff3f361007b3, retrieved 2026-09-23, 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 0.2, primary claude-haiku-4-5-20251001 (text), consensus claude-sonnet-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