TC1920 datasheet(54/78 Pages) INFINEON

54 / 78 page

TC1920

Data Sheet

V 1.3, 2003-10

Preliminary

Codec ADC and DAC path characteristics

Note: Numbers without units in the test conditions column are relative frequency values

to the chosen sampling frequency. e.g. 0.425 equals 3.4 kHz @ 8 kHz sampling

frequency.

Parameters

min.

typ.

max.

Unit

Test conditions1)

Values given in this table are valid for all sampling frequencies.

Attenuation distortion

(ref. freq. 1014 Hz)

(ref. level 0dBm0)2)

2) 0dBm0 is equivalent to -12dBm is equal to 194.7 mV

RMS.

-0.25

0.25

0.45

< 0.025

0.025-0.0375

0.0375-0.3

0.3-0.425

> 0.425

Signal to total distor-

tion

-55

-45

at 0dBm0

Gain tracking

(ref. freq. 1014 Hz)

(ref. level 0dBm0)2)

-0.3

-0.6

-1.6

0.3

0.6

1.6

+3 to -40 dBm0

-40 to -50 dBm0

-50 to -55 dBm0

Idle channel noise

-80

-75

dBm

receive &transmit

Cross talk

-80

-75

Harmonic distortion

-60

-50

at 0dBm0

Gain

(ref. freq. 1014 Hz)

(ref. level 0dBm0)2)

-0.8

0.8

receive &transmit

Power supply

rejection ratio (PSRR)

--60

-40

-35

Receive (0.0375-0.425)3)

Transmit (0.0375-0.425)3)

Supply ripple 70 mV.

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