TDA1373H/N2 View Datasheet(PDF) - Philips Electronics

Part Name

Description

Manufacturer

TDA1373H/N2

General Digital Input (GDIN)

Philips Electronics 

Philips Semiconductors

General Digital Input (GDIN)

Product specification

TDA1373H

SLAVE-VCO AND SLAVE-VCXO MODES

In the SLAVE-VCO and SLAVE-VCXO modes, the GDIN

can pass an exact copy of the incoming samples to the

output, e.g. for storage on a digital medium such as CD-R.

The output sample rate tracks any input sample rate within

the frequency range of the external VC(X)O (fso = fsi).

In the SLAVE-VCO mode a pitch variation of ±12.5%

around the nominal sample frequency can be tolerated.

Data path (see Fig.5)

The signal at input sample frequency fsi comes in via one

of the DI1 inputs (IEC 958).

The ADIC signal passes through the FIFO/GAIN block and

can be fed through the IN-BAND NOISE SHAPER to the

serial output DO1. Additionally, the signal is present at

DO2 (4fso) and at the Bitstream outputs AOL and AOR.

Exact copies for digital use (e.g. write to a disk) from the

input signal can be retrieved at output FO (this signal might

be affected by jitter since it has not passed through the

FIFO/GAIN block). By means of data path switch DSO, this

direct output of the ADIC block can also be fed to

output DO1. Note that in this event the DO1 serial format

becomes equal to the FO format (see Table 3).

AD/DA MODE

In this mode, the GDIN supports an economic realization

of analog-to-digital and digital-to-analog conversion, in

accordance with the Bitstream principle. This requires a

Bitstream sigma-delta modulator and a Bitstream DAC,

since the up-sampling and down-sampling filters of the

sample rate convertor are reused. ADC and DAC can be

simultaneously performed.

Data path DA conversion (see Fig.6)

The signal at sample frequency fso comes in via serial input

DI2X or via one of the DI1 inputs (IEC 958). The signal

passes through the FIFO/GAIN part and is interpolated in

the up-sampling filters. A Bitstream digital filter converts

this signal into a Bitstream signal at outputs AOL and AOR,

after which it can be filtered by a Bitstream DAC like the

TDA1547.

Data path AD conversion (see Fig.6)

The Bitstream signal from the sigma-delta modulator

enters the GDIN at inputs AIL and AIR. The

down-sampling filters decimate this signal to fso and after

in-band noise shaping (selectable), the output signal is

present at serial output DO1.

1996 Jul 17

10

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