Analog Devices Inc. AD8655 & AD8656 Precision CMOS Amplifiers
Analog Devices Inc. AD8655 and AD8656 Precision CMOS Amplifiers leverage ADI's DigiTrim® technology to achieve low noise and high DC accuracy. DigiTrim technology is a method of trimming the offset voltage of the amplifier after it is packaged. The advantage of post-package trimming is that it corrects any offset voltages caused by the mechanical stresses of assembly. The AD8655 and AD8656 are available in standard op-amp pinouts, making DigiTrim completely transparent to the user. The input stage of the amplifiers features a true rail-to-rail architecture, allowing the input common-mode voltage range of the amplifiers to extend to both positive and negative supply rails. The open-loop gain of the AD8655 and AD8656 with a load of 10kΩ is typically 110dB.
The AD8655 and AD8656 CMOS Amplifiers provide low noise (2.7nV/√Hz at 10kHz), low THD + N (0.0007%), and high precision performance (250μV 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 and 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/ and AD8656 to reduce system-level noise performance and maintain audio fidelity. The high precision and rail-to-rail input and output of the AD8655 and AD8656 Amplifiers benefit data acquisition, process controls, and PLL filter applications.
The Analog Devices Inc. AD8655 and AD8656 Precision CMOS Amplifiers are available in Pb-free MSOP-8 and SOIC-8 packages. The AD8655W and AD8656W variants of this device are qualified for automotive applications.
Features
- DigiTrim technology for high DC accuracy
- Low noise
- 2.7nV/√Hz @ f = 10kHz typical
- Low 250μV offset voltage over VCM
- Low 0.0008% distortion
- Offset voltage drift
- 0.4μV/°C typical
- 2.3μV/°C maximum
- 28MHz bandwidth
- Rail-to-rail input and output
- Unity gain stable
- 110dB typical large signal voltage gain
- 2.7V to 5.5V operation
- -40°C to +125°C operating temperature range
- Package options
- MSOP-8
- SOIC-8
- Automotive-qualified options (AD8655W and AD8656W variants)
- Pb-free and RoHS compliant
Applications
- ADC and DAC buffers
- Audio
- Industrial controls
- Precision filters
- Data acquisition
- Digital scales
- Automotive collision avoidance
- PLL filters
Pin Designations
Package Outline
