AD571 General Description
The AD571 is an 10-bit successive approximation A/D converter consisting of a DAC, voltage reference, clock, comparator, successive approximation register and output buffers-all fabricated on a single chip. No external components are required to perform a full accuracy 10-bit conversion in 40 µs.
Operating on supplies of +5 V to +15 V and 15 V, the AD571 will accepts analog inputs of 0 V to +10 V unipolar of ±5 V bipolar, externally selectable. When the BLANK and ,CONVERT input is driven low, the three-state outputs will be open and a conversion will commence. Upon completion of the conversion, the,DATA ,READY line goes low and the data appears at the output. Pulling the BLANK and ,CONVERT input
high blanks the outputs and readies the device for the next conversion. The AD571 executes a true 10-bit conversion with no missing codes in 40 µs maximum.
The AD571 is available in two version for the 0°C to +70°C temperature range, the AD571J and K. The AD571S guarantees 10-bit accuracy and no missing codes from 55°C to +125°C.
AD571 Maximum Ratings
V+ to Digital Common
AD571J . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 V to +7 V
AD571K . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 V to +16.5 V
V to Digital Common . . . . . . . . . . . . . . . . . . 0 V to 16.0 V
Analog Common to Digital Common . . . . . . . . . . . . . . . ±1 V
Analog Input to Analog Common . . . . . . . . . . . . . . . . . ±15 V
Control Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 V to V+
Digital Outputs (Blank Mode) . . . . . . . . . . . . . . . . . 0 V to V+
Power Dissipation. . . . . . . . . . . . . . . . . . . . . . . . . . . . 800 mW
AD571 Features
Complete A/D Converter with Reference and Clock
Fast Successive Approximation Conversion: 40 ms max
No Missing Codes Over Temperature
08C to +708C: AD571K
558C to +1258C: AD571S
Digital Multiplexing: Three-State Outputs
18-Pin Ceramic DIP
Low Cost Monolithic Construction
AD571
PDF/DataSheet Download

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