This Technical Note describes the evaluation board for the AD7476/77. The AD7476/77 are, respectively, 12 bit and 10 bit, high speed, low power, successive-approxima- tion ADC's. The parts operate from a single 2.35 V to 5.25 V power supply and feature throughtput rates up to 1MSPS. The parts contain a low-noise, wide bandwidth track/hold amplifier which can handle input frequencies in excess of 1MHz. Full data on the AD7476/77 is available in the AD7476/77 data sheet available from Analog De- vices and should be consulted in conjunction with this Technical Note when using the Evaluation Board.
This document describes the EVAL-AD7476/77CB, a full-featured evaluation board designed for the AD7476 (12-bit) and AD7477 (10-bit) high-speed, low-power successive-approximation analog-to-digital converters. The board features on-board analog buffering using an OP467 quad op-amp and includes precision voltage references (AD780 and REF195). It supports both standalone operation with external power supplies and connection to the EVAL-CONTROL BOARD via a 96-way connector for control and data analysis.
Removing link LK2 sets the AD780 output voltage to +2.5 V.
Removing link LK1 removes the 50W termination from the analog input buffer circuit.
In position A, both the +12 V and -12 V are supplied from the EVAL-CONTROL BOARD through the 96-way connector.