Datasheet AD8655, AD8656 (Analog Devices)

Low Noise, Precision CMOS Amplifier Data Sheet AD8655/ AD8656 FEATURES PIN CONFIGURATIONS Low noise: 2.7 nV/
√
Hz at f = 10 kHz NC 1 8 NC OUT A 1 8 V+ Low offset voltage: 250 µV max over VCM –IN AD8655 AD8656 2 7 V+ –IN A 2 7 OUT B Offset voltage drift: 0.4 µV/°C typ and 2.3 µV/°C max TOP VIEW +IN 3 6 OUT +IN A 3 TOP VIEW 6 –IN B (Not to Scale) Bandwidth: 28 MHz (Not to Scale) V– 4 5 NC V– 4 5 +IN B
05304-059
Rail-to-rail input/output NC = NO CONNECT
05304-048
Unity gain stable
Figure 2. AD8656
2.7 V to 5.5 V operation
Figure 1. AD8655 8-Lead MSOP (RM-8) 8-Lead MSOP (RM-8)
−40°C to +125°C operation
8-Lead SOIC (R-8) 8-Lead SOIC (R-8)
Qualified for automotive applications APPLICATIONS ADC and DAC buffers Audio Industrial controls Precision filters Digital scales Automotive collision avoidance PLL filters GENERAL DESCRIPTION
The AD8655/AD8656 are the industry’s lowest noise, precision The high precision performance of the AD8655/AD8656 improves CMOS amplifiers. They leverage the Analog Devices DigiTrim® the resolution and dynamic range in low voltage applications. technology to achieve high dc accuracy. Audio applications, such as microphone pre-amps and audio The AD8655/AD8656 provide low noise (2.7 nV/√Hz at 10 kHz), mixing consoles, benefit from the low noise, low distortion, and low THD + N (0.0007%), and high precision performance high output current capability of the AD8655/AD8656 to reduce (250 µV max over V system level noise performance and maintain audio fidelity. The CM) to low voltage applications. The ability to swing rail-to-rail at the input and output enables designers high precision and rail-to-rail input and output of the AD8655/ to buffer analog-to-digital converters (ADCs) and other wide AD8656 benefit data acquisition, process controls, and PLL dynamic range devices in single-supply systems. 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.
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Document Outline Features Applications Pin Configurations General Description Table of Contents Revision History Specifications Absolute Maximum Ratings ESD Caution Typical Performance Characteristics Theory of Operation Applications Information Input Overvoltage Protection Input Capacitance Driving Capacitive Loads THD Readings vs. Common-Mode Voltage Layout, Grounding, and Bypassing Considerations Power Supply Bypassing Grounding Leakage Currents Outline Dimensions Ordering Guide Automotive Products