INA157UA from Texas Instruments, 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	Ref	input	Reference terminal to which the output is referred; a voltage applied here is summed with the output signal, and its source impedance should be below 10Ω to maintain good CMRR.
2	-In	input	Inverting differential input (12kΩ input resistor); source impedances at the inputs must be nearly equal to preserve common-mode rejection.
3	+In	input	Non-inverting differential input (12kΩ input resistor); source impedances at the inputs must be nearly equal to preserve common-mode rejection.
4	V-	power_in	Negative power supply, operating range ±4V to ±18V supplies; decoupling capacitor recommended close to the pin.
5	Sense	input	Output sense terminal connected to the feedback network, normally tied to the Output pin.
6	Output	output	Amplifier output with continuous short-circuit current limit of ±60mA to common and stable with up to 500pF capacitive load.
7	V+	power_in	Positive power supply, operating range ±4V to ±18V supplies (40V max V+ to V-); decoupling capacitor recommended close to the pin.
8	NC	unconnected	No connection.

Key specifications

Parameter	Value
Manufacturer	Texas Instruments
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
Offset Voltage Initial (RTO)		-1000	100	1000	µV		2
Offset Voltage vs Temperature		-20	2	20	µV/°C		2
Offset Voltage vs Power Supply		-60	5	60	µV/V	VS = ±4V to ±18V	2
Common-Mode Rejection Ratio	CMRR	80	96		dB	VCM = -37.5V to 37.5V, RS = 0Ω	2
Gain Error		-0.1	0.01	0.1	%	VO = -10V to +10V	2
Gain vs Temperature		-10	1	10	ppm/°C		2
Gain Nonlinearity		-0.002	0.0001	0.002	% of FS	VO = -10V to +10V	2
Operating Voltage Range		4		18	V	printed ±4 to ±18	2
Quiescent Current	IQ		2.4	2.9	mA	IO = 0mA	2
Specified Temperature Range		-40		85	°C		2
Operation Temperature Range		-55		125	°C		2
Thermal Resistance SO-8	ΘJA		150		°C/W	SO-8 Surface-Mount	2
Supply Voltage, V+ to V-				40	V		3
Input Voltage Range		-80		80	V		3
Operating Temperature		-55		125	°C		3
Storage Temperature		-55		125	°C		3
Junction Temperature				150	°C		3
Lead Temperature				300	°C	soldering, 10s	3
Input Impedance Differential			24		kΩ		2
Input Impedance Common-Mode			18		kΩ		2
Offset Voltage vs Time			0.25		µV/mo		2
Output Voltage Noise 0.1Hz to 10Hz			1.3		µVp-p	f = 0.1Hz to 10Hz	2
Output Voltage Noise 1kHz			26		nV/√Hz	f = 1kHz	2
Gain Initial			0.5		V/V		2
Output Current Limit			60		mA	Continuous to Common, printed ±60	2
Capacitive Load (stable operation)			500		pF		2
Small-Signal Bandwidth			4		MHz	-3dB	2
Slew Rate			14		V/µs		2
Settling Time 0.1%			2		µs	10V Step, CL = 100pF	2
Settling Time 0.01%			3		µs	10V Step, CL = 100pF	2
Overload Recovery Time			3		µs	50% Overdrive	2
Rated Supply Voltage			15		V	printed ±15	2

CAD (KiCad official)

Symbol: INA157UA
Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
3D model: SOIC-8 (KiCad packages3D, STEP)
3D model files: ina157ua-etched.step / ina157ua-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); ina157ua.step / ina157ua.glb are the bare package body.

Provenance

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

Datasheet: Texas Instruments datasheet (14 pp, sha256 7e25f61a18f1f076, retrieved 2026-10-31, tier: lcsc)
Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-sonnet-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

INA157UA

Verified INA157UA

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3D Model

Symbol & Footprint

Schematic Symbol

PCB Footprint

Datasheet

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