APPLICATIONS
D 5-V Supply Voltage D Oversampling Second-Order Sigma-Delta Modulator D 1.024-MHz Master Clock Frequency D On-Chip Continuous-Time Antialiasing and Smoothing Filters D High-Performance Fully Differential and Symmetrical Analog Data Paths D Internal Reference Voltage and Common-Mode Bias Voltage Generation D Very Low Power Consumption Mode MSP58C20 AUDIOĆBAND CONVERTER ą SPSS015B − DECEMBER 1993 − REVISED JULY 1996 DW PACKAGE (TOP VIEW) VSUB 1 NC 2 VSS 3 AIP 4 AIM 5 PWAD 6 PWDA 7 ADOUT 8 NC 9 NC 10 20 NC 19 NC 18 AOP 17 AOM 16 DIGS 15 DIGL 14 ADCLK 13 VDD 12 NC 11 NC NC − No internal connection description The analog-to-digital conversion chain consists of a continuous-time antialiasing stage, an analog oversampled modulator, and the modulator bias voltage. The antialiasing stage is a second-order low-pass filter with a cutoff frequency of typically 190 kHz. The modulator is a sigma-delta feedback loop, which oversamples the signal at 1.024 MHz and provides second-order noise shaping.
Texas Instruments
