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AD8476

Analog Devices
Part Number AD8476
Manufacturer Analog Devices
Description Fully Differential Amplifier and ADC Driver
Published Jul 22, 2014
Detailed Description Data Sheet FEATURES Low Power, Unity Gain, Fully Differential Amplifier and ADC Driver AD8476 FUNCTIONAL BLOCK DIAGRAM ...
Datasheet PDF File AD8476 PDF File

AD8476
AD8476

Overview
Data Sheet FEATURES Low Power, Unity Gain, Fully Differential Amplifier and ADC Driver AD8476 FUNCTIONAL BLOCK DIAGRAM 7 –VS 8 INP 6 NC 5 –OUT Very low power 330 μA supply current Extremely low harmonic distortion −126 HD2 at 10 kHz −128 HD3 at 10 kHz Fully differential or single-ended inputs/outputs Differential output designed to drive precision ADCs Drives switched capacitor and Σ-Δ ADCs Rail-to-rail outputs VOCM pin adjusts output common mode Robust overvoltage up to 18 V beyond supplies High performance Suitable for driving 16-bit converter up to 250 kSPS 39 nV/√Hz output noise 1 ppm/°C gain drift maximum 200 μV maximum output offset 10 V/μs slew rate 6 MHz bandwidth Single supply: 3 V to 18 V Dual supplies: ±1.
5 V to ±9 V 10kΩ 10kΩ 10kΩ AD8476 10kΩ +VS 2 VOCM 3 +OUT 4 INN 1 NOTES 1.
NC = NO CONNECT.
DO NOT CONNECT TO THIS PIN.
Figure 1.
8-Lead MSOP 13 –VS 15 –VS 14 –VS 16 –VS INP 1 INP 2 INN 3 INN 4 10kΩ 10kΩ 10kΩ 12 NC 11 –OUT AD8476 10 +OUT 10kΩ 9 VOCM APPLICATIONS ADC driver Differential instrumentation amplifier building block Single-ended-to-differential converter Battery-powered instruments +VS 5 +VS 6 +VS 7 +VS 8 10195-001 NOTES 1.
NC = NO CONNECT.
DO NOT CONNECT TO THIS PIN.
Figure 2.
16-Lead LFCSP GENERAL DESCRIPTION The AD8476 is a very low power, fully differential precision amplifier with integrated gain resistors for unity gain.
It is an ideal choice for driving low power, high performance ADCs as a single-ended-to-differential or differential-to-differential amplifier.
It provides a precision gain of 1, common-mode level shifting, low temperature drift, and rail-to-rail outputs for maximum dynamic range.
The AD8476 also provides overvoltage protection from large industrial input voltages up to ±23 V while operating on a dual 5 V supply.
Power dissipation on a single 5 V supply is only 1.
5 mW.
The AD8476 works well with SAR, Σ-Δ, and pipeline converters.
The high current output stage of the part allows it to drive the switched c...


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