AD8620 Low Input Bias Current, Wide BW JFET Precision Dual Op Amp

The AD8610 (single) and AD8620 (dual) are very high precision JFET input amplifiers featuring ultralow offset voltage and drift, very low input voltage and current noise, very low input bias current, and wide bandwidth. Unlike many JFET amplifiers, the AD8610 input bias current is low over the entire operating temperature range. The AD8610 is stable with capacitive loads of over 1000 pF in noninverting unity gain; much larger capacitive loads can be driven easily at higher noise gains. The AD8610 swings to within 1.2 V of the supplies even with a 1 k Ω load, maximizing dynamic range even with limited supply voltages. Outputs slew at 50 V/µs in either inverting or noninverting gain configurations, and settle to 0.01% accuracy in less than 600 ns. Combined with the high input impedance, great precision, and very high output drive, theAD8610 is an ideal amplifier for driving high performance A/D inputs and buffering D/A converter outputs.

Applications for the AD8610 and AD8620 include electronic instruments; ATE amplification, buffering, and integrator circuits; CAT/MRI/Ultrasound medical instrumentation; instrumentation quality photodiode amplification; fast precision filters (including PLL filters); and high quality audio.

The AD8610 is fully specified over the extended industrial (-40ºC to +125ºC temperature range. The AD8610 is available in the narrow 8-lead SOIC and the tiny MSOP8 surface-mount packages. The AD8620 is available in the narrow 8-lead SOIC package. MSOP8 packaged devices are available only in tape and reel.

Features and Benefits

Low Noise 6 nV/√Hz

Low Offset Voltage: 100 µV Max

Low Input Bias Current 10 pA Max

Fast Settling: 600 ns to 0.01%

Low Distortion

Unity Gain Stable

No Phase Reversal

Dual-Supply Operation: ±5 V to ±13 V

Amplifiers

Security and Surveillance

Scanning Equipment

SPICE Models

AD8620 SPICE Macro Model .CIR

Data Sheets

Document	note
AD8610/AD8620: Precision Very Low Noise Low Input Bias Current Wide Bandwith JFET Op Amp Data Sheet (Rev. F)	PDF 3864 kB

Application Notes

Document	note
AN-106: A Collection of Amp Applications	PDF 1094 kB
AN-356: User's Guide to Applying and Measuring Operational Amplifier Specifications	PDF 538 kB
AN-256: Accurately Testing Op Amp Settling Times	PDF 106 kB
AN-692: Universal Precision Op Amp Evaluation Board (Rev. A)	PDF 621 kB
AN-649: Using the Analog Devices Active Filter Design Tool (Rev. 0)	PDF 5.3 M

Order Information

Part Number	Package	Packing Qty	Temp Range	Price 100-499	Price 1000+	RoHS
AD8620AR Last Time Buy	8 ld SOIC	OTH 98	-40 to 125C	10.27	8.64	N
AD8620AR-REEL7 Last Time Buy	8 ld SOIC	REEL 1000	-40 to 125C	0	8.64	N
AD8620ARZ Production	8 ld SOIC	OTH 98	-40 to 125C	8.91	7.5	Y
AD8620ARZ-REEL Production	8 ld SOIC	REEL 2500	-40 to 125C	0	7.5	Y
AD8620ARZ-REEL7 Production	8 ld SOIC	REEL 1000	-40 to 125C	0	7.5	Y
AD8620BRZ Production	8 ld SOIC	OTH 98	-40 to 125C	19.81	16.7	Y
AD8620BRZ-REEL7 Production	8 ld SOIC	REEL 1000	-40 to 125C	0	16.7	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