AD8641 Low Power, Rail-to-Rail Output Precision Single JFET Op Amp

Applications Line-/battery-powered instruments Photodiode amplifiers Precision current sensing Medical instrumentation Industrial controls Precision filters Portable audio ATE

The AD8641/AD8642/AD8643 are low power, precision JFET input amplifiers featuring extremely low input bias current and rail-to-rail output. The ability to swing nearly rail-to-rail at the input and rail-to-rail at the output enables designers to buffer CMOS DACs, ASICs, and other wide output swing devices in single-supply systems. The outputs remain stable with capacitive loads of more than 500 pF.

The AD8641/AD8642/AD8643 are suitable for applications utilizing multichannel boards that require low power to manage heat. Other applications include photodiodes, ATE reference level drivers, battery management, and industrial controls.

The AD8641/AD8642/AD8643 are fully specified over the extended industrial temperature range of –40°C to +125°C. The AD8641 is available in 5-lead SC70 and 8-lead SOIC lead-free packages. The AD8642 is available in 8-lead MSOP and 8-lead SOIC lead-free packages. The AD8643 is available in 14-lead SOIC and 16-lead, 3 mm × 3 mm, LFCSP lead-free packages.

Features and Benefits

Low Supply Current: 250 µA max

Very Low Input Bias Current: 1 pA max

Low Offset Voltage: 750 µV max

Single-supply Operation: 5 V to 26 V

Dual-supply Operation: ±2.5 V to ±13 V

Rail-to-rail Output

Unity Gain Stable

No Phase Reversal

SC70 Package

Amplifiers

SPICE Models

AD8641 SPICE Macro-Model .CIR

Reference Designs

CN0306 Design & Integration Files .ZIP

Data Sheets

Document	note
AD8641/AD8642/AD8643: Low Power, Rail-to-Rail Output, Precision JFET Amplifiers Data Sheet (Rev. F)	PDF 315.28 K

Order Information

Part Number	Package	Packing Qty	Temp Range	Price 100-499	Price 1000+	RoHS
AD8641AKSZ-R2 Production	5 ld SC70	REEL 250	-40 to 125C	2.66	2.66	Y
AD8641AKSZ-REEL7 Production	5 ld SC70	REEL 3000	-40 to 125C	0	1.47	Y
AD8641ARZ Production	8 ld SOIC	OTH 98	-40 to 125C	1.83	1.47	Y
AD8641ARZ-REEL7 Production	8 ld SOIC	REEL 1000	-40 to 125C	0	1.47	Y

Evaluation Boards

Part Number	Description	Price	RoHS
EVAL-PRAOPAMP-1KSZ	Single KS-5 lead SC70 Evaluation Board	20.19	Y
EVAL-PRAOPAMP-1RJZ	Single RJ-5 lead SOT23 Evaluation Board	20.19	Y
EVAL-PRAOPAMP-1RMZ	Single RM-8 lead MSOP Evaluation Board	20.19	Y
EVAL-PRAOPAMP-1RZ	Single R-8 lead SOIC Evaluation Board	20.19	Y