16-Bit, 195 kSPS
CMOS, - ADC
AD7722
FEATURES
16-Bit - ADC
64 Oversampling Ratio
Up to 220 kSPS Output Word Rate
Low-Pass, Linear Phase Digital Filter
Inherently Monotonic
On-Chip 2.5 V Voltage Reference
Single-Supply 5 V
High Speed Parallel or Serial Interface FUNCTIONAL BLOCK DIAGRAM
DGND DVDD AGND AVDD AD7722 VIN (+)
VIN (–) REF1 2.5V
REFERENCE 16-BIT A/D CONVERTER
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MODULATOR GENERAL DESCRIPTION The AD7722 is a complete low power, 16-bit, Σ-∆ ADC. The
part operates from a 5 V supply and accepts a differential input
voltage range of 0 V to +2.5 V or ± 1.25 V centered around a
common-mode bias. The AD7722 provides 16-bit performance
for input bandwidths up to 90.625 kHz. The part provides data
at an output word rate of 195.3 kHz.
The analog input is continuously sampled by an analog modulator, eliminating the need for external sample-and-hold circuitry. …