12-Bit 800kHz Sampling CMOS ANALOG-to-DIGITAL CONVERTER
®
ADS7810
ADS 781 0
12-Bit 800kHz Sampling CMOS ANALOG-to-DIGITAL CONVERTER
FEATURES
q 1.25µs THROUGHPUT TIME q STANDA...
Description
®
ADS7810
ADS 781 0
12-Bit 800kHz Sampling CMOS ANALOG-to-DIGITAL CONVERTER
FEATURES
q 1.25µs THROUGHPUT TIME q STANDARD ±10V INPUT RANGE q 69dB min SINAD WITH 250kHz INPUT q ±3/4 LSB max INL AND ±1 LSB max DNL q INTERNAL REFERENCE q COMPLETE WITH S/H, REF, CLOCK, ETC. q PARALLEL DATA w/LATCHES q 28-PIN SOIC
DESCRIPTION
The ADS7810 is a complete 12-bit sampling A/D using state-of-the-art CMOS structures. It contains a complete 12-bit capacitor-based SAR A/D with inherent S/H, reference, clock, interface for microprocessor use, and three-state output drivers. The ADS7810 is specified at an 800kHz sampling rate, and guaranteed over the full temperature range. Laser-trimmed scaling resistors provide the industrystandard ±10V input range, while an innovative design allows operation from ±5V supplies. The 28-pin ADS7810 is available in a plastic SOIC fully specified for operation over the industrial –40°C to +85°C range.
Clock
Successive Approximation Register and Control Logic
CDAC 2450Ω ±10V Input 625Ω Comparator Cap Output Latches and Three State Drivers
BUSY Three State Parallel Data Bus
18kΩ
Buffer
4.8kΩ 2.5V Ref Out/In 8.6kΩ Internal Ref
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