AD8557ARZ-REEL7 from Analog Devices, in a SOIC-8. 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	VDD	power_in	Positive supply voltage; the AD8557 operates from single-supply 2.7 V to 5.5 V.
2	DIGOUT	output	Digital output that functions as the data output pin in read mode.
3	DIGIN	input	Digital input for the single-wire serial interface used to program gain and output offset.
4	VNEG	input	Negative amplifier input (inverting input).
5	VPOS	input	Positive amplifier input (noninverting input).
6	VCLAMP	input	Sets the clamp voltage at the output; the clamp input voltage range is 1.25 V to 5.0 V.
7	VOUT	output	Amplifier output.
8	VSS	power_in	Negative supply voltage, specified with VSS = 0.0 V in the test conditions.

Key specifications

Parameter	Value
Manufacturer	Analog Devices
Package	SOIC-8
Category	Operational Amplifier/Comparator
Pins	8

Electrical characteristics

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

Parameter	Symbol	Min	Typ	Max	Unit	Conditions	Page
Input Offset Voltage	VOS		2	12	μV		3
Input Offset Voltage Drift	TCVOS		27	65	nV/°C		3
Input Bias Current	IB	10	18	25	nA		3
Input Offset Current	IOS		1	4	nA		3
Input Voltage Range		0.6		3.8	V		3
Common-Mode Rejection Ratio	CMRR	75	85		dB	VCM = 0.9 V to 3.6 V, AV = 28	3
Common-Mode Rejection Ratio	CMRR	96	112		dB	VCM = 0.9 V to 3.6 V, AV = 1300	3
Differential Gain Temperature Coefficient			15	40	ppm/°C	Second stage gain = 10 to 250	3
DAC Accuracy			0.7	0.8	%	Offset codes = 8 to 248	3
Output Offset			5	35	mV	Offset codes = 8 to 248	3
Output Offset Temperature Coefficient			20	80	ppm FS/°C		3
Clamp Input Voltage Range		1.25		5	V		3
Short-Circuit Current Source	ISC	-45		-25	mA	Source	3
Short-Circuit Current Sink	ISC	40		55	mA	Sink	3
DIGIN Pulse Width to Load 0	tw0	0.05		10	μs	TA = 25°C	3
Supply Voltage				6	V		5
Differential Input Voltage		-6		6	V		5
Storage Temperature Range		-65		150	°C		5
Operating Temperature Range		-40		125	°C		5
Junction Temperature Range		-65		150	°C		5
Lead Temperature				300	°C		5
Thermal Resistance Junction-to-Ambient	θJA		158		°C/W	8-Lead SOIC (R)	5
Thermal Resistance Junction-to-Case	θJC		43		°C/W	8-Lead SOIC (R)	5

CAD (KiCad official)

Symbol: AD8557ARZ-REEL7
Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
3D model: SOIC-8 (KiCad packages3D, STEP)
3D model files: ad8557arz-reel7-etched.step / ad8557arz-reel7-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); ad8557arz-reel7.step / ad8557arz-reel7.glb are the bare package body.

Provenance

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

Datasheet: Analog Devices datasheet (24 pp, sha256 d1274d83a1eac004, retrieved 2026-10-30, 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

AD8557ARZ-REEL7

Verified AD8557ARZ-REEL7

Verification log 1 record

3D Model

Symbol & Footprint

Schematic Symbol

PCB Footprint

Datasheet

README