AD8668:  16 V, 4 MHz Rail-to-Rail Output Amplifiers

The AD866x family are single supply, rail-to-rail output amplifiers with low noise performance featuring an extended operating range with supply voltages up to 16 V. They also feature low input bias ...More

AD8668:  16 V, 4 MHz Rail-to-Rail Output Amplifiers

Product Description

The AD866x family are single supply, rail-to-rail output amplifiers with low noise performance featuring an extended operating range with supply voltages up to 16 V. They also feature low input bias currents, wide signal bandwidth, and low input voltage and current noise. For lower offset voltage, choose the AD8661/AD8662/AD8664 family. The combination of low offsets, very low input bias currents, and wide supply range make these amplifiers useful in a wide variety of cost sensitive applications normally associated with much higher priced JFET amplifiers. Systems using high impedance sensors, such as photo diodes, benefit from the combination of low input bias current, low noise, and low offset and bandwidth. The wide operating voltage range matches high performance ADCs and DACs. Audio applications and medical monitoring equipment can take advantage of the high input impedance, low voltage and current noise, wide bandwidth, and the lack of popcorn noise found in many other low input bias current amplifiers.

The AD866x family is specified over the extended industrial temperature range (−40°C to +125°C).


Applications
  • Sensor amplification
  • Reference buffers
  • Medical equipment
  • Physiological measurements
  • Signal filters and conditioning
  • Consumer audio
  • Photodiode amplification
  • ADC driver
  • Level shifting circuits

Features

  • Offset voltage: 2.5 mV max
  • Low input bias current: 1 pA max
  • Single-supply operation: 5 V to 16 V
  • Dual-supply operation: ±2.5 V to ±8 V
  • Low noise: 8 nV/√Hz @ 10 kHz
  • Wide bandwidth: 4 MHz
  • Rail-to-rail output
  • Unity-gain stable
  • Lead-free packaging

Diagrams

AD8668 Pin Diagram
Pin Diagram for AD8668

Specifications

-3dB Bandwidth 4MHz
Slew Rate 3.5V/µs
Vos 600µV
Ib 0.2pA
Input Noise (nV/rtHz) 10nV/rtHz
Vcc-Vee Supply (V) 5 to 16
Iq per Amplifier (max) 1.55mA
# OpAmps per Pkg 4
Operating Temp Range -40 to +125
Packages SOIC,SOP

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Part# Small Signal Bandwidth Slew Rate Vos Ib V Noise Density Amplifiers Per Package Widest Temp Range (°C)
AD8668 4MHz 3.5V/µs 600µV 200fA 10nV/rtHz 4 -40 to +125
AD8608 10MHz 5V/µs 20µV 200fA 6.5nV/rtHz 4 -40 to +125
AD8694 10MHz 5V/µs 400µV 200fA 8nV/rtHz 4 -40 to +125
AD8618 24MHz 12V/µs 23µV 200fA 6nV/rtHz 4 -40 to +125
OP484 4.25MHz 4V/µs 250µV 80nA 3.9nV/rtHz 4 -40 to +125
AD8604 8.4MHz 6V/µs 500µV 200fA 18nV/rtHz 4 -40 to +125
AD8674 10MHz 4V/µs 20µV 3nA 2.8nV/rtHz 4 -40 to +125
OP462 15MHz 13V/µs 25µV 260nA 9.5nV/rtHz 4