MAX9943AUA+ from Maxim Integrated, in a MSOP-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	N.C.	unconnected	No connection; this pin is not connected internally on the 8-pin µMAX package.
2	IN-	input	Negative (inverting) input of the amplifier, which the datasheet protects from excessive differential voltage with internal back-to-back diodes and series resistors.
3	IN+	input	Positive (non-inverting) input of the amplifier; the input common-mode range extends to the negative supply VEE, with bias current increasing between VEE and VEE + 0.3V.
4	VEE	power_in	Negative power supply, bypassed with a 0.1µF capacitor to ground; single-supply operation uses VEE at ground.
5	N.C.	unconnected	No connection; this pin is not connected internally on the 8-pin µMAX package.
6	OUT	output	Amplifier output, which can swing to both VCC and VEE rails when lightly loaded and deliver up to 20mA of current.
7	VCC	power_in	Positive power supply, bypassed with a 0.1µF capacitor to ground; supply range is ±3V to ±19V dual or 6V to 38V single.
8	N.C.	unconnected	No connection; this pin is not connected internally on the 8-pin µMAX package.

Key specifications

Parameter	Value
Manufacturer	Maxim Integrated
Package	MSOP-8
Category	Interface ICs
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
Operating Supply Voltage Range	VSUPPLY	3		19	V	Guaranteed by PSRR test	2
Quiescent Supply Current per Amplifier	ICC		550	950	µA		2
Power-Supply Rejection Ratio	PSRR	105	130		dB	VS = ±3V to ±19V	2
Input Offset Voltage	VOS		20	100	µV	TA = +25°C	2
Input Offset Voltage	VOS			240	µV	TA = -40°C to +125°C	2
Input Bias Current	IBIAS		4	20	nA	VEE + 0.3V ≤ VCM ≤ VCC - 1.8V	2
Input Bias Current	IBIAS			90	nA	VEE ≤ VCM ≤ VCC - 1.8V	2
Input Offset Current	IOS		1	10	nA	VEE ≤ VCM ≤ VCC - 1.8V	2
Common-Mode Rejection Ratio	CMRR	105	125		dB	VEE + 0.3V ≤ VCM ≤ VCC - 1.8V	2
Common-Mode Rejection Ratio	CMRR	105			dB	VEE ≤ VCM ≤ VCC - 1.8V	2
Open-Loop Gain	AVOL	115	130		dB	-13.5V ≤ VO ≤ +13.5V, RL = 10kΩ, TA = +25°C	3
Open-Loop Gain	AVOL	100			dB	-13.5V ≤ VO ≤ +13.5V, RL = 10kΩ, TA = -40°C to +125°C	3
Open-Loop Gain	AVOL	100	110		dB	-12V ≤ VO ≤ +12V, RL = 600Ω, TA = +25°C	3
Open-Loop Gain	AVOL	90			dB	-12V ≤ VO ≤ +12V, RL = 600Ω, TA = -40°C to +85°C	3
Short-Circuit Current	ISC	60			mA	TA = +25°C	3
Short-Circuit Current	ISC	100			mA	TA = -40°C to +125°C	3
Capacitive Loading	CLOAD			1000	pF	No sustained oscillation	3
Supply Voltage (VCC to VEE)		-0.3		40	V		2
Continuous Input Current (Any Pins)		-20		20	mA		2
OUT Short-Circuit Current Duration				3	s	8-Pin µMAX, VCC - VEE ≤ 20V	2
Junction Temperature				150	°C		2
Lead Temperature (soldering, 10s)				300	°C		2
Soldering Temperature (reflow)				260	°C		2
Operating Temperature Range		-40		125	°C		2

CAD (KiCad official)

Symbol: MAX9943AUA+
Footprint: Package_SO:MSOP-8_3x3mm_P0.65mm
3D model: MSOP-8 (KiCad packages3D, STEP)
3D model files: max9943aua-etched.step / max9943aua-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); max9943aua.step / max9943aua.glb are the bare package body.

Provenance

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

Datasheet: Maxim Integrated datasheet (11 pp, sha256 3280693bb0efbb08, 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).

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MAX9943AUA+

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