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FEATURES Fast Conversion Time: 5 s On-Chip Track/Hold Low Total Unadjusted Error: 1 LSB Full Power Signal Bandwidth: 50 kHz Single +5 V Supply 100 ns Data Access Time Low Power (15 mW typ) Low Cost Standard 18-Lead DlPs or 20-Terminal
Surface Mount Packages
LC2MOS 5 s 8-Bit ADC with Track/Hold
AD7575
AIN AGND
VREF
CLK
FUNCTIONAL BLOCK DIAGRAM
TRACK AND HOLD
VDD
COMP
AD7575
CLOCK OSCILLATOR
DAC SAR
CS
LATCH AND
DB7
RD TP
CONTROL LOGIC
THREE STATE OUTPUT DRIVERS
DB0
GENERAL DESCRIPTION The AD7575 is a high speed 8-bit ADC with a built-in track/ hold function. The successive approximation conversion technique is used to achieve a fast conversion time of 5 µs, while the built-in track/hold allows full-scale signals up to 50 kHz (386 mV/µs slew rate) to be digitized. The AD7575 requires only a single +5 V supply and a low cost, 1.23 V bandgap reference in order to convert an input signal range of 0 to 2 VREF.
The AD7575 is designed for easy interfacing to all pop.