PCM4202DBR datasheet(23/32 Pages) TI2

23 / 32 page

PCM4202

SBAS290B − JULY 2003 − SEPTEMBER 2004

www.ti.com

COMPATIBILITY WITH THE PCM1804

Although the PCM4202 and PCM1804 are pin- and

function-compatible, there are a few differences between

the two devices that the designer should be aware of.

These differences are noted here for clarity.

D The full-scale input of the PCM4202 is 6.0VPP

differential, while it is 5.0VPP for the PCM1804. This

is a result of the PCM4202 having an internal +3.0V

voltage reference, and the PCM1804 having an

internal +2.5V voltage reference.

D The PCM1804 includes +5V tolerant digital inputs.

The PCM4202 does not include these because the

digital inputs are designed for interfacing to +3.3V

logic.

D The reset pin (RST) pin of the PCM4202 has an

internal pull-up resistor. For the PCM1804, this pin

has an internal pull-down resistor.

D When operating in Master mode with Single Rate

sampling selected, the audio serial port bit clock

(BCK) is equal to 64fS for the PCM1804, while the

BCK rate is equal to 128fS for the PCM4202.

D The following pins on the PCM4202 and PCM1804

have different names, but they perform the same

functions.

TERMINAL

NUMBER

PCM4202

TERMINAL NAME

PCM1804

TERMINAL NAME

FS0

OSR0

FS1

OSR1

FS2

OSR2

HPFD

BYPAS

CLIPR

OVFR

CLIPL

OVFL

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