Description

The AD8655/AD8656 are instrumentation op amps that stand out in the market for their ultra-low noise and high precision performance. These precision CMOS amplifiers are designed to provide low noise (2.7 nV/√Hz @ 10 kHz), low THD + N (0.0007%), and high precision performance (250 μV max over VCM) to low voltage applications. Additionally, the AD8655/AD8656 have the ability to swing rail-to-rail at the input and output, making them an excellent choice for buffering analog-to-digital converters (ADCs) and other wide dynamic range devices in single-supply systems. These amplifiers leverage the Analog Devices DigiTrim® technology to achieve high dc accuracy.

Specifications and features

• Low noise: 2.7 nV/√Hz @ f = 10 kHz
• Low offset voltage: 250 μV max over VCM
• Offset voltage drift: 0.4 μV/°C typ and 2.3 μV/°C max
• Bandwidth: 28 MHz
• Rail-to-rail input/output
• Unity gain stable
• 2.7 V to 5.5 V operation
• −40°C to +125°C operation

Application Scenarios

The AD8655ARZ is a great option for applications that require low noise and high precision. Here are some examples of where this component can be used:

• ADC and DAC buffers
• Audio processing
• Industrial controls
• Precision filters
• Digital scales
• Strain gauges
• PLL filters

Comparison

• Offers ultra-low noise and high precision performance
• Can swing rail-to-rail at the input and output, making it a great choice for buffering ADCs and other wide dynamic range devices in single-supply systems

• The AD8655ARZ has a limited voltage range of 2.7 V to 5.5 V