ADS7808

ADS7808 ADS7808 SBAS018A – JANUARY 1992 – REVISED SEPTEMBER 2003 12-Bit 10µs Serial CMOS Sampling ANALOG-to-DIGITAL CONVERTER FEATURES q 100kHz SAMPLING RATE q 72dB SINAD WITH 45kHz INPUT q ±1/2 LSB INL AND DNL q SIX SPECIFIED INPUT RANGES q SERIAL OUTPUT q SINGLE +5V SUPPLY OPERATION q PIN-COMPATIBLE WITH 16-BIT ADS7809 q USES INTERNAL OR EXTERNAL REFERENCE q 100mW MAX POWER DISSIPATION q 0.3" SO-20 q SIMPLE DSP INTERFACE DESCRIPTION The ADS7808 is a complete 12-bit sampling analog-to-digital using state-of-the-art CMOS structures. It contains a 12-bit capacitor-based SAR A/D with S/H, reference, clock, and a serial data interface. Data can be output using the internal clock, or can be synchronized to an external data clock. The ADS7808 also provides an output synchronization pulse for ease of use with standard DSP processors. The ADS7808 is specified at a 100kHz sampling rate, and specified over the full temperature range. Laser-trimmed scaling resistors provide various input ranges including ±10V and 0V to 5V, while an innovative design operates from a single +5V supply, with power dissipation under 100mW. The ADS7808 is available in a 0.3" SO-20, fully specified for operation over the industrial –40°C to +85°C range. R1IN R2IN R3IN CAP 20kΩ 10kΩ 20kΩ 5kΩ REF R/C CS Power Down Successive Approximation Register and Control Logic CDAC Buffer 4kΩ Internal +2.5V Ref Comparator Clock Serial Data Out BUSY Data Clock Serial Data Please be aware that an important...