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AD7091R-4BRUZ-RL7

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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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AD7091R-4BRUZ-RL7

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

AD7091R-4BRUZ-RL7 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 CS input Chip Select Input: when CS is held low the serial bus is enabled and CS frames the output data on the SPI.
2 RESET input Reset logic input.
3 VDD power_in Power supply input; VDD range is 2.7 V to 5.25 V and the pin must be decoupled to GND.
4 REGCAP passive Decoupling capacitor pin for the voltage output of the internal regulator; decouple separately to GND with a 1.0 µF capacitor.
5 REFIN/REFOUT bidirectional Voltage reference output of 2.5 V that must be decoupled to GND (typical 2.2 µF); an external reference may be applied with a range of 1.0 V to VDD.
6 GND power_in Chip ground pin; ground reference point for all circuitry on the AD7091R-4.
7 MUXOUT output Multiplexer output; tie directly to ADCIN if no external filtering or buffering is required, otherwise tie to the conditioning network output feeding ADCIN.
8 VIN0 input Analog input 0; single-ended input with an analog input range of 0 V to VREF.
9 VIN2 input Analog input 2; single-ended input with an analog input range of 0 V to VREF.
10 ALERT/BUSY/GPO0 output Multifunction output: logic ALERT output indicating a conversion result outside the register limits, BUSY output indicating conversion in progress, or general-purpose digital output, as set by the configuration register.
11 GPO1 output General-purpose digital output.
12 VIN3 input Analog input 3; single-ended input with an analog input range of 0 V to VREF.
13 VIN1 input Analog input 1; single-ended input with an analog input range of 0 V to VREF.
14 ADCIN input ADC input giving access to the on-chip track-and-hold; tie to MUXOUT directly if no external filtering or buffering is required.
15 GND power_in Chip ground pin; ground reference point for all circuitry on the AD7091R-4.
16 SDI input Serial data input bus that provides data written to the on-chip control registers, clocked in on the rising edge of SCLK with MSB first.
17 SDO output Serial data output bus that supplies the conversion result as a serial stream clocked out on the SCLK falling edge; 13 SCLKs are required and data is MSB first.
18 SCLK input Serial clock input for the SPI interface.
19 CONVST input Convert start input; a falling edge places the track-and-hold into hold mode and initiates a conversion.
20 VDRIVE power_in Logic power supply input that sets the interface voltage; range is 1.8 V to 5.25 V and may differ from VDD; decouple with 10 µF and 0.1 µF to GND.

Key specifications

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

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter Symbol Min Typ Max Unit Conditions Page
Signal-to-Noise Ratio (SNR) SNR 66.5 70 dB fIN = 10 kHz sine wave 3
Signal-to-Noise-and-Distortion (SINAD) Ratio SINAD 65.5 69 dB fIN = 10 kHz sine wave 3
Integral Nonlinearity (INL) INL -1 0.7 1 LSB VDD ≥ 3.0 V 3
Integral Nonlinearity (INL) INL -1.25 0.8 1.25 LSB VDD ≥ 2.7 V 3
Differential Nonlinearity (DNL) DNL -0.9 0.3 0.9 LSB Guaranteed no missing codes to 12 bits 3
Offset Error -1.5 0.2 1.5 mV TA = 25°C 3
Offset Error Matching -1.5 0.2 1.5 mV TA = 25°C 3
Gain Error -0.1 0 0.1 % FS TA = 25°C 3
Gain Error Matching -0.1 0 0.1 % FS TA = 25°C 3
DC Leakage Current -1 1 µA 3
Internal reference output (REFOUT) REFOUT 2.49 2.5 2.51 V Internal reference output, TA = 25°C 3
External reference input (REFIN) REFIN 1 V External reference input 3
Input Current (logic inputs) IIN -1 1 µA Typically 10 nA, VIN = 0 V or VDRIVE 3
Output Low Voltage VOL 0.4 V ISINK = 200 µA 3
Floating State Leakage Current -1 1 µA 3
VDD to GND VDD -0.3 7 V Rating to GND 7
VDRIVE to GND VDRIVE -0.3 7 V Rating to GND 7
Input Current to Any Pin Except Supplies -10 10 mA 7
Operating Temperature Range TA -40 125 °C 7
Storage Temperature Range -65 150 °C 7
Junction Temperature TJ 150 °C 7
ESD Human Body Model (HBM) 1.5 kV 7
ESD Field Induced Charged Device Model (FICDM) 500 V 7
Supply voltage VDD VDD 2.7 5.25 V Specified supply range 1
Logic supply voltage VDRIVE VDRIVE 1.8 5.25 V Voltage range on VDRIVE pin 8
Thermal resistance, junction-to-ambient, 20-Lead TSSOP θJA 84.29 °C/W Device soldered in circuit board, surface-mount package 7
Thermal resistance, junction-to-case, 20-Lead TSSOP θJC 18.43 °C/W 7

CAD (KiCad official)

  • Symbol: AD7091R-4BRUZ-RL7
  • Footprint: Package_SO:TSSOP-20_4.4x6.5mm_P0.65mm
  • 3D model: TSSOP-20 (KiCad packages3D, STEP)
  • 3D model files: ad7091r-4bruz-rl7-etched.step / ad7091r-4bruz-rl7-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); ad7091r-4bruz-rl7.step / ad7091r-4bruz-rl7.glb are the bare package body.

Provenance

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

  • Datasheet: Analog Devices datasheet (39 pp, sha256 9c0395b23368e515, 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