AD8657 18V, 22µA, 45nV/√Hz, Precision RRIO, Dual Op Amp

The AD8657/AD8659 are dual and quad micropower, precision, rail-to-rail input/output amplifiers optimized for low power and wide operating supply voltage range applications.

The AD8657/AD8659 operates from 2.7 V to 18 V with a typical quiescent supply current of 18 μA. The devices use the Analog Devices, Inc., patented DigiTrim® trimming technique, which achieves low offset voltage. The AD8657/AD8659 also have high immunity to electromagnetic interference.

The combination of low supply current, low offset voltage, very low input bias current, wide supply range, and rail-to-rail input and output make the AD8657/AD8659 ideal for current monitoring in process and motor control applications. The combination of precision specifications makes these devices ideal for dc gain and buffering of sensor front ends or high impedance input sources in wireless or remote sensors or transmitter.

The AD8657/AD8659 is specified over the extended industrial temperature range (−40°C to +125°C). The AD8657 is available in an 8-lead MSOP package and an 8-lead LFCSP package; the AD8659 is available in a 14-lead SOIC package and 16-lead LFCSP package.

Applications

Portable operating systems
Current monitors
4 mA to 20 mA loop drivers
Buffer/level shifting
Multipole filters
Remote/wireless sensors
Low power transimpedance amplifiers

Features and Benefits

Micropower at high voltage (18 V): 22 μA maximum

Low offset voltage: 350 µV maximum

Low input bias current: 20 pA maximum

Gain bandwidth product: 230 kHz at AV = 100 typical

Unity-gain crossover: 230 kHz

−3 dB closed-loop bandwidth: 305 kHz

Single-supply operation: 2.7 V to 18 V

Dual-supply operation: ±1.35 V to ±9 V

Unity-gain stable

Excellent electromagnetic interference immunity

Amplifiers

SPICE Models

AD8657 SPICE Macro-Model .CIR

Reference Designs

CN0179 Design & Integration Files .ZIP

Data Sheets

Document	note
AD8657/AD8659: 22 µA, RRIO, CMOS,18 V Operational Amplifiers Data Sheet (Rev. B)	PDF 711 kB

Technical Books

Document	note

Order Information

Part Number	Package	Packing Qty	Temp Range	Price 100-499	Price 1000+	RoHS
AD8657ACPZ-R7 Production	8 ld LFCSP (3x3mm, 1.6x2.34mm exposed pad	REEL 1500	-40 to 125C	0	0.95	Y
AD8657ACPZ-RL Production	8 ld LFCSP (3x3mm, 1.6x2.34mm exposed pad	REEL 5000	-40 to 125C	0	0.95	Y
AD8657ARMZ Production	8 ld MSOP	OTH 50	-40 to 125C	1.15	0.95	Y
AD8657ARMZ-R7 Production	8 ld MSOP	REEL 1000	-40 to 125C	0	0.95	Y
AD8657ARMZ-RL Production	8 ld MSOP	REEL 3000	-40 to 125C	0	0.95	Y

Evaluation Boards

Part Number	Description	Price	RoHS
EVAL-PRAOPAMP-2CPZ	Dual CP-8 lead LFCSP Evaluation Board	20.19	Y
EVAL-PRAOPAMP-2RMZ	Dual RM-8 lead MSOP Evaluation Board	20.19	Y
EVAL-PRAOPAMP-2RZ	Dual R-8 lead SOIC Evaluation Board	20.19	Y