AD8661 Datasheet

• Low offset voltage: 100 µV maximum at V_S = 5 V
• Low input bias current: 1 pA maximum
• Single-supply operation: 5 V to 16 V
• Low noise: 10 nV/√Hz
• Wide bandwidth: 4 MHz
• Unity-gain stable
• Small package options
  • 3 mm × 3 mm 8-lead LFCSP
  • 8-lead MSOP and narrow SOIC
  • 14-lead TSSOP and narrow SOIC

• Sensors
• Medical equipment
• Consumer audio
• Photodiode amplification
• ADC drivers

The AD8661 are rail-to-rail output, single-supply amplifiers that use the Analog Devices, Inc., patented DigiTrim^® trimming technique to achieve low offset voltage. The AD8661 series features extended operating ranges, with supply voltages up to 16 V. It also features low input bias current, wide signal bandwidth, and low input voltage and current noise.

The combination of low offset, very low input bias current, and a wide supply range makes these amplifiers useful in a wide variety of applications usually associated with higher priced JFET amplifiers. Systems using high impedance sensors, such as photodiodes, benefit from the combination of low input bias current, low noise, low offset, and wide bandwidth. The wide operating voltage range meets the demands of high performance analog-to-digital converters (ADCs) and digital-to-analog converters (DACs). Audio applications and medical monitoring equipment can take advantage of the high input impedance, low voltage, low current noise, and wide bandwidth.

The single AD8661 is available in a narrow 8-lead SOIC package and a very thin, dual lead, 8-lead LFCSP. The AD8661 SOIC package is specified over the extended industrial temperature range of −40°C to +125°C. The AD8661 LFCSP is specified over the industrial temperature range of −40°C to +85°C.