AD8643 Datasheet

• Low supply current: 250 μA max
• Very low input bias current: 1 pA max
• Low offset voltage: 750 μV max
• Single-supply operation: 5 V to 26 V
• Dual-supply operation: ±2.5 V to ±13 V
• Rail-to-rail output
• Unity-gain stable
• See datasheet for additional features

• Line-/battery-powered instruments
• Photodiode amplifiers
• Precision current sensing
• Medical instrumentation
• Industrial controls
• Precision filters
• Portable audio
• ATE 

The AD8643 are low power, precision JFET input amplifiers featuring extremely low input bias current and rail-to-rail output. The ability to swing nearly rail-to-rail at the input and rail-to-rail at the output enables designers to buffer complementary metal-oxide semiconductor digital-to-analog converters (CMOS DACs), ASICs, and other wide output swing devices in single-supply systems. The outputs remain stable with capacitive loads of more than 500 pF.

The AD8643 are suitable for applications utilizing multichannel boards that require low power to manage heat. Other applications include photodiodes, ATE reference level drivers, battery management, and industrial controls.

The AD8643 are fully specified over the extended industrial temperature range of −40°C to +125°C. The AD8643 is available in 14-lead SOIC and 16-lead, 3 mm × 3 mm, LFCSP lead-free packages.