LT1638IS8#PBF from Analog Devices, in a SO-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	OUT A	output	Output of amplifier A, which swings within 20mV of the positive rail and within 3mV of the negative rail with no load and sources or sinks at least 25mA.
2	-IN A	input	Inverting input of amplifier A, protected by an internal 1k series resistor and diode for excursions up to 2V below V-, with a maximum differential input voltage of 44V.
3	+IN A	input	Non-inverting input of amplifier A, whose common-mode range includes both supplies and which can operate up to 44V above V- regardless of V+.
4	V-	power_in	Negative supply pin; total supply voltage (V+ to V-) is specified from 2.5V to 44V, with reverse battery protection up to 18V.
5	+IN B	input	Non-inverting input of amplifier B, whose common-mode range includes both supplies and which can operate up to 44V above V- regardless of V+.
6	-IN B	input	Inverting input of amplifier B, protected by an internal 1k series resistor and diode for excursions up to 2V below V-, with a maximum differential input voltage of 44V.
7	OUT B	output	Output of amplifier B, which swings within 20mV of the positive rail and within 3mV of the negative rail with no load and sources or sinks at least 25mA.
8	V+	power_in	Positive supply pin, which should be bypassed with about 0.1µF within an inch of the pin; total supply voltage (V+ to V-) is specified from 2.5V to 44V.

Key specifications

Parameter	Value
Manufacturer	Analog Devices
Package	SO-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 (LT1638 N, S packages), TA = 25°C, 3V/5V	VOS		200	600	μV	LT1638 N, S Packages; TA = 25°C	4
Input Offset Voltage (LT1638 N, S packages), 3V/5V	VOS			950	μV	LT1638 N, S Packages; -40°C ≤ TA ≤ 85°C	4
Input Offset Voltage Drift (N, S packages)	VOS drift		2	6	μV/°C	LT1638/LT1639 N, S Packages; Note 9 (not 100% tested)	4
Input Voltage Range, 3V/5V	VCM	0		44	V	VS = 3V, 0V; VS = 5V, 0V	4
Common Mode Rejection Ratio	CMRR	88	98		dB	VCM = 0V to VCC, 1V	4
Common Mode Rejection Ratio	CMRR	80	88		dB	VCM = 0V to 44V (Note 8); -40°C ≤ TA ≤ 85°C	4
Large-Signal Voltage Gain, VS = 3V, TA = 25°C	AVOL	200	1500		V/mV	VS = 3V, VO = 500mV to 2.5V, RL = 10k; TA = 25°C	4
Large-Signal Voltage Gain, VS = 3V	AVOL	100			V/mV	VS = 3V, VO = 500mV to 2.5V, RL = 10k; -40°C ≤ TA ≤ 85°C	4
Large-Signal Voltage Gain, VS = 5V, TA = 25°C	AVOL	400	1500		V/mV	VS = 5V, VO = 500mV to 4.5V, RL = 10k; TA = 25°C	4
Large-Signal Voltage Gain, VS = 5V	AVOL	200			V/mV	VS = 5V, VO = 500mV to 4.5V, RL = 10k; -40°C ≤ TA ≤ 85°C	4
Output Voltage Swing Low, 3V No Load	VOL		3	8	mV	VS = 3V, No Load	4
Output Voltage Swing Low, 3V ISINK 5mA	VOL		250	450	mV	VS = 3V, ISINK = 5mA	4
Output Voltage Swing Low, 5V No Load	VOL		3	8	mV	VS = 5V, No Load	4
Output Voltage Swing Low, 5V ISINK 10mA	VOL		500	700	mV	VS = 5V, ISINK = 10mA	4
Output Voltage Swing High, 3V No Load	VOH	2.94	2.98		V	VS = 3V, No Load	4
Output Voltage Swing High, 3V ISOURCE 5mA	VOH	2.25	2.4		V	VS = 3V, ISOURCE = 5mA	4
Output Voltage Swing High, 5V No Load	VOH	4.94	4.98		V	VS = 5V, No Load	4
Output Voltage Swing High, 5V ISOURCE 10mA	VOH	3.8	4		V	VS = 5V, ISOURCE = 10mA	4
Short-Circuit Current, 3V short to GND	ISC	10	15		mA	VS = 3V, Short to GND (Note 2)	4
Short-Circuit Current, 3V short to VCC	ISC	15	25		mA	VS = 3V, Short to VCC (Note 2)	4
Short-Circuit Current, 5V short to GND	ISC	15	20		mA	VS = 5V, Short to GND (Note 2)	4
Short-Circuit Current, 5V short to VCC	ISC	15	25		mA	VS = 5V, Short to VCC (Note 2)	4
Power Supply Rejection Ratio, 3V to 12.5V	PSRR	90	100		dB	VS = 3V to 12.5V, VCM = VO = 1V	5
Minimum Operating Supply Voltage			2.4	2.7	V		5
Supply Current per Amplifier, 25°C	IS		170	230	μA	Note 6	5
Supply Current per Amplifier, -40°C to 85°C	IS			275	μA	Note 6; -40°C ≤ TA ≤ 85°C	5
Gain Bandwidth Product, 3V, TA = 25°C	GBW	650	1075		kHz	f = 5kHz; TA = 25°C (Note 5)	5
Gain Bandwidth Product, 3V	GBW	500			kHz	f = 5kHz; -40°C ≤ TA ≤ 85°C (Note 5)	5
Slew Rate, 3V/5V, TA = 25°C	SR	0.21	0.38		V/μs	AV = -1, RL = ∞; TA = 25°C (Note 7)	5
Slew Rate, 3V/5V	SR	0.17			V/μs	AV = -1, RL = ∞; -40°C ≤ TA ≤ 85°C (Note 7)	5
Input Offset Voltage (LT1638 N, S packages), TA = 25°C, ±15V	VOS		250	800	μV	LT1638 N, S Packages; VS = ±15V; TA = 25°C	5
Input Offset Voltage (LT1638 N, S packages), ±15V	VOS			1100	μV	LT1638 N, S Packages; VS = ±15V; -40°C ≤ TA ≤ 85°C	5
Input Offset Current, ±15V	IOS		1	6	nA		6
Input Bias Current, ±15V	IB		20	50	nA		5
Input Voltage Range, ±15V	VCM	-15		29	V	VS = ±15V	5
Common Mode Rejection Ratio, ±15V	CMRR	80	88		dB	VCM = -15V to 29V	5
Large-Signal Voltage Gain, ±15V, TA = 25°C	AVOL	200	500		V/mV	VS = ±15V, VO = ±14V, RL = 10k; TA = 25°C	5
Large-Signal Voltage Gain, ±15V	AVOL	100			V/mV	VS = ±15V, VO = ±14V, RL = 10k; -40°C ≤ TA ≤ 85°C	5
Output Voltage Swing, No Load, ±15V	VO	14.9	14.95		V	VS = ±15V, No Load	5
Output Voltage Swing, IOUT = ±10mA, ±15V	VO	13.7	14		V	VS = ±15V, IOUT = ±10mA	5
Power Supply Rejection Ratio, ±15V	PSRR	90	100		dB	VS = ±1.5V to ±22V	6
Supply Current per Amplifier, ±15V, TA = 25°C	IS		205	280	μA	VS = ±15V; TA = 25°C	6
Supply Current per Amplifier, ±15V	IS			350	μA	VS = ±15V; -40°C ≤ TA ≤ 85°C	6
Gain Bandwidth Product, ±15V, TA = 25°C	GBW	750	1200		kHz	f = 5kHz; VS = ±15V; TA = 25°C	6
Gain Bandwidth Product, ±15V	GBW	600			kHz	f = 5kHz; VS = ±15V; -40°C ≤ TA ≤ 85°C	6
Slew Rate, ±15V, TA = 25°C	SR	0.225	0.4		V/μs	AV = -1, RL = ∞, VO = ±10V; TA = 25°C	6
Slew Rate, ±15V	SR	0.18			V/μs	AV = -1, RL = ∞, VO = ±10V; -40°C ≤ TA ≤ 85°C	6
Input Current	II	-25		25	mA		2
Junction Temperature	TJ			150	°C		2
Storage Temperature Range	TSTG	-65		150	°C		2
Lead Temperature (Soldering)	TLEAD			300	°C	10 sec	2
Specified / Operating Temperature Range (I grade)	TA	-40		85	°C	LT1638I/LT1639I	2
Thermal Resistance, junction to ambient (S8 package)	θJA		190		°C/W	S8 package; TJMAX = 150°C	2

CAD (KiCad official)

Symbol: LT1638IS8#PBF
Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
3D model: SO-8 (KiCad packages3D, STEP)
3D model files: lt1638is8-pbf-etched.step / lt1638is8-pbf-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); lt1638is8-pbf.step / lt1638is8-pbf.glb are the bare package body.

Provenance

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

Datasheet: Analog Devices datasheet (18 pp, sha256 a1ec4ee3eafecefc, 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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LT1638IS8#PBF

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