Low Noise, Precision CMOS Dual Amplifier

The AD8655/AD8656 are the industry’s lowest noise, precision CMOS amplifiers. They leverage the Analog Devices DigiTrim® technology to achieve high dc accuracy.

The AD8655/AD8656 provide low noise (2.7 nV/√Hz at 10 kHz), low THD + N (0.0007%), and high precision performance (250 μV max over VCM) to low voltage applications. The ability to swing rail-to-rail at the input and output enables designers to buffer analog-to-digital converters (ADCs) and other wide dynamic range devices in single-supply systems.

The high precision performance of the AD8655/AD8656 improves the resolution and dynamic range in low voltage applications. Audio applications, such as microphone pre-amps and audio mixing consoles, benefit from the low noise, low distortion, and high output current capability of the AD8655/AD8656 to reduce system level noise performance and maintain audio fidelity. The high precision and rail-to-rail input and output of the AD8655/ AD8656 benefit data acquisition, process controls, and PLL filter applications.

The AD8655/AD8656 are fully specified over the −40°C to +125°C temperature range. The AD8655/AD8656 are available in Pb-free, 8-lead MSOP and SOIC packages. The AD8655/ AD8656 are both available for automotive applications.

Applications

* ADC and DAC buffers

* Audio

* Industrial controls

* Precision Filters

* Digital Scales

* Automotive collision avoidance

* PLL filters

* Low Noise:

2.7 nV/√rHz @ f = 10 kHz

* Low offset voltage:

250 μV max over Vcm

* Low Distortion: 0.0008%

* 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

* Qualified for automotive applications