Datasheet

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SBAS290B − JULY 2003 − SEPTEMBER 2004

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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 6.0V

differential, while it is 5.0V

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 64f

for the PCM1804, while the

BCK rate is equal to 128f

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

9 FS0 OSR0

10 FS1 OSR1

11 FS2 OSR2

12 HPFD BYPAS

20 CLIPR OVFR

21 CLIPL OVFL