Datasheet AD8610, AD8620 (Analog Devices)

Precision, Very Low Noise, Low Input Bias Current, Wide Bandwidth JFET Operational Amplifiers AD8610/AD8620 FEATURES PIN CONFIGURATIONS Low noise: 6 nV/√Hz NULL 1 8 NC Low offset voltage: 100 μV maximum –IN 2 AD8610 7 V+ Low input bias current: 10 pA maximum +IN 3 TOP VIEW 6 OUT (Not to Scale) Fast settling: 600 ns to 0.01% V– 4 5 NULL
1 0 0 0-
Low distortion
73
NC = NO CONNECT
02
Unity gain stable
Figure 1. 8-Lead MSOP and 8-Lead SOIC_N
No phase reversal Dual-supply operation: ±5 V to ±13 V OUTA 1 8 V+ APPLICATIONS –INA 2 AD8620 7 OUTB +INA 3 TOP VIEW 6 –INB Photodiode amplifiers (Not to Scale) V– 4 5 +INB
02 0
ATE
0- 3 27 0
Instrumentation
Figure 2. 8-Lead SOIC_N
Sensors and controls High performance filters Fast precision integrators High performance audio GENERAL DESCRIPTION
The AD8610/AD8620 are very high precision JFET input ampli- Applications for the AD8610/AD8620 include electronic instru- fiers featuring ultralow offset voltage and drift, very low input ments; ATE amplification, buffering, and integrator circuits; voltage and current noise, very low input bias current, and wide CAT/MRI/ultrasound medical instrumentation; instrumentation bandwidth. Unlike many JFET amplifiers, the AD8610/AD8620 quality photodiode amplification; fast precision filters (including input bias current is low over the entire operating temperature PLL filters); and high quality audio. range. The AD8610/AD8620 are stable with capacitive loads of The AD8610/AD8620 are fully specified over the extended over 1000 pF in noninverting unity gain; much larger capacitive industrial temperature range (−40°C to +125°C). The AD8610 loads can be driven easily at higher noise gains. The AD8610/ is available in the narrow 8-lead SOIC and the tiny 8-lead MSOP AD8620 swing to within 1.2 V of the supplies even with a 1 kΩ surface-mount packages. The AD8620 is available in the narrow load, maximizing dynamic range even with limited supply volt- 8-lead SOIC package. The 8-lead MSOP packaged devices are ages. Outputs slew at 50 V/μs in either inverting or noninverting avail-able only in tape and reel. gain configurations, and settle to 0.01% accuracy in less than 600 ns. Combined with high input impedance, great precision, and very high output drive, the AD8610/AD8620 are ideal amplifiers for driving high performance ADC inputs and buffering DAC converter outputs.
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Document Outline FEATURES APPLICATIONS PIN CONFIGURATIONS GENERAL DESCRIPTION TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS ELECTRICAL SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS ESD CAUTION TYPICAL PERFORMANCE CHARACTERISTICS THEORY OF OPERATION FUNCTIONAL DESCRIPTION Power Consumption Driving Large Capacitive Loads Slew Rate (Unity Gain Inverting vs. Noninverting) Input Overvoltage Protection No Phase Reversal THD Readings vs. Common-Mode Voltage Noise vs. Common-Mode Voltage Settling Time Output Current Capability Operating with Supplies Greater than ±13 V Input Offset Voltage Adjustment Programmable Gain Amplifier (PGA) High Speed Instrumentation Amplifier High Speed Filters Second-Order, Low-Pass Filter High Speed, Low Noise Differential Driver OUTLINE DIMENSIONS ORDERING GUIDE