AD7723
FEATURES
16-Bit Sigma-Delta ADC 1.2 MSPS Output Word Rate 32/16 ؋ Oversampling Ratio Low-Pass and Band-Pass Digital Filter Linear Phase On-Chip 2.5 V Voltage Reference Standby Mode Flexible Parallel or Serial Interface Crystal Oscillator Single +5 V Supply
AVDD AGND VIN(+) VIN(- )
16-Bit, 1.2 MSPS CMOS, Sigma-Delta ADC AD7723
FUNCTIONAL BLOCK DIAGRAM
2.5V REFERENCE REF2 REF1 DVDD DGND
MODULATOR
FIR FILTER
UNI HALF_PWR STBY MODE 1 MODE 2 SYNC DVDD / CS CFMT/ RD DGND/ DRDY DGND/DB0
XTAL CLOCK
XTAL_OFF XTAL CLKIN DGND/DB15 DGND/DB14 SCR/DB13 SLDR/DB12 SLP/DB11 TSI/DB10 FSO/DB9
CONTROL LOGIC
DGND/ DGND/ DGND/ DOE/ SFMT/ FSI/ SCO/ SDO/ DB1 DB2 DB3 DB4 DB5 DB6 DB7 DB8
GENERAL DESCRIPTION
The AD7723 is a plete 16-bit, sigma-delta ADC. The part operates from a +5␣ V supply. The analog input is continuously sampled, eliminating the need for an external sample-and-hold. The modulator output is processed by a finite impulse response (FIR) digital filter. The on-chip filtering...
