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Contents

Pinout
Key specifications
CAD (KiCad official)
Provenance

README

markdown

AD7998BRUZ-1

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

AD7998BRUZ-1 from Analog Devices, in a TSSOP-20. 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	AGND	power_in	Analog ground reference point for all circuitry; all analog input signals must be referred to this AGND voltage.
2	VDD	power_in	Power supply input with specified voltage range of 2.7 V to 5.5 V.
3	AGND	power_in	Analog ground reference point for all circuitry; all analog input signals must be referred to this AGND voltage.
4	AGND	power_in	Analog ground reference point for all circuitry; all analog input signals must be referred to this AGND voltage.
5	VDD	power_in	Power supply input with specified voltage range of 2.7 V to 5.5 V.
6	REFIN	input	External voltage reference input with range 1.2 V to VDD, requiring 0.1 µF and 1 µF decoupling capacitors to AGND.
7	VIN1	input	Single-ended analog input channel 1 with input range of 0 V to REFIN.
8	VIN3	input	Single-ended analog input channel 3 with input range of 0 V to REFIN.
9	VIN5	input	Single-ended analog input channel 5 with input range of 0 V to REFIN.
10	VIN7	input	Single-ended analog input channel 7 with input range of 0 V to REFIN.
11	VIN8	input	Single-ended analog input channel 8 with input range of 0 V to REFIN.
12	VIN6	input	Single-ended analog input channel 6 with input range of 0 V to REFIN.
13	VIN4	input	Single-ended analog input channel 4 with input range of 0 V to REFIN.
14	VIN2	input	Single-ended analog input channel 2 with input range of 0 V to REFIN.
15	AS	input	Address select logic input for configuring one of three I2C addresses by connection to AGND, VDD, or floating.
16	CONVST	input	Edge-triggered conversion start logic input; rising edge powers up device with minimum 1 µs pulse width, falling edge initiates conversion.
17	ALERT/BUSY	output	Open-drain digital output selectable as ALERT output for limit violation indication or BUSY output for conversion status monitoring.
18	SDA	bidirectional	Serial bus bidirectional data line with open-drain output capability requiring external pull-up resistor.
19	SCL	input	Serial bus clock input with open-drain capability requiring external pull-up resistor.
20	AGND	power_in	Analog ground reference point for all circuitry; all analog input signals must be referred to this AGND voltage.

Key specifications

Parameter	Value
Manufacturer	Analog Devices
Package	TSSOP-20
Category	ADC/DAC/Data Conversion
Pins	20

CAD (KiCad official)

Symbol: AD7998BRUZ-1
Footprint: Package_SO:TSSOP-20_4.4x6.5mm_P0.65mm
3D model: TSSOP-20 (KiCad packages3D, STEP)
3D model files: ad7998bruz-1-etched.step / ad7998bruz-1-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); ad7998bruz-1.step / ad7998bruz-1.glb are the bare package body.

Provenance

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

Datasheet: Analog Devices datasheet (32 pp, sha256 081ef00889049a99, retrieved 2026-09-18, tier: lcsc)
Extractor: parts-factory 2.0.0 / extract_pins 0.2, primary claude-haiku-4-5-20251001 (text), consensus claude-sonnet-4-6 (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