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AD7866BRUZ

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Analog Devices Analog To Digital Converters (ADCs), TSSOP-20. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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AD7866BRUZ

Analog Devices · Analog To Digital Converters (ADCs) · TSSOP-20

AD7866BRUZ from Analog Devices, in a TSSOP-20. 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 REF SELECT input Logic input that selects the on-chip 2.5 V reference when tied to GND, or an external reference through VREF when tied to logic high.
2 DCAPB passive Decoupling capacitor connection for the ADC B reference buffer, which can also take the on-chip reference out or input a separate external reference.
3 AGND power_in Analog ground reference for all analog circuitry, which must not be more than 0.3 V from DGND even on a transient basis.
4 VB2 input Single-ended analog input channel 2 of ADC B, with an input range of 0 V to VREF or 2 x VREF set by RANGE at the falling edge of CS.
5 VB1 input Single-ended analog input channel 1 of ADC B, with an input range of 0 V to VREF or 2 x VREF set by RANGE at the falling edge of CS.
6 VA2 input Single-ended analog input channel 2 of ADC A, with an input range of 0 V to VREF or 2 x VREF set by RANGE at the falling edge of CS.
7 VA1 input Single-ended analog input channel 1 of ADC A, with an input range of 0 V to VREF or 2 x VREF set by RANGE at the falling edge of CS.
8 AGND power_in Analog ground reference for all analog circuitry, which must not be more than 0.3 V from DGND even on a transient basis.
9 DCAPA passive Decoupling capacitor connection for the ADC A reference buffer, which can also take the on-chip reference out or input a separate external reference.
10 VREF power_in Reference decoupling pin connected to the internal 2.5 V reference, which requires a decoupling capacitor and serves as the external reference input when REF SELECT is high.
11 RANGE input Logic input sampled on the falling edge of CS that sets the input range (low for 0 V to VREF with straight binary, high for 2 x VREF with twos complement).
12 AVDD power_in Analog supply voltage of 2.7 V to 5.25 V that must stay within 0.3 V of DVDD even on a transient basis.
13 DVDD power_in Digital supply voltage of 2.7 V to 5.25 V that must stay within 0.3 V of AVDD even on a transient basis.
14 DGND power_in Digital ground reference for all digital circuitry, which must not be more than 0.3 V from AGND even on a transient basis.
15 DOUTA output Serial data output for ADC A that clocks out on the falling edge of SCLK, MSB first, after one leading zero and three STATUS bits.
16 DOUTB output Serial data output for ADC B that clocks out on the falling edge of SCLK, MSB first, after one leading zero and three STATUS bits.
17 VDRIVE power_in Logic power supply input that sets the voltage level at which the digital interface operates and should be decoupled to DGND.
18 SCLK input Serial clock logic input that clocks out the conversion data and sets the conversion rate.
19 CS input Active-low chip select logic input that initiates conversions on its falling edge and frames the serial data transfer.
20 A0 input Multiplexer select logic input, sampled on the falling edge of CS, that chooses Channel 1 (low) or Channel 2 (high) of both ADCs for the next conversion.

Key specifications

Parameter Value
Manufacturer Analog Devices
Package TSSOP-20
Category Data Converters
Pins 20

CAD (KiCad official)

  • Symbol: AD7866BRUZ
  • Footprint: Package_SO:TSSOP-20_4.4x6.5mm_P0.65mm
  • 3D model: TSSOP-20 (KiCad packages3D, STEP)
  • 3D model files: ad7866bruz-etched.step / ad7866bruz-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); ad7866bruz.step / ad7866bruz.glb are the bare package body.

Provenance

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

  • Datasheet: Analog Devices datasheet (24 pp, sha256 97330acd060d2794, retrieved 2026-10-28, tier: manufacturer)
  • 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