TDA1541 データシートの表示（PDF） - Philips Electronics

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TDA1541

Dual 16-bit DAC

Philips Electronics 

Philips Semiconductors

Dual 16-bit DAC

Product specification

TDA1541

FUNCTIONAL DESCRIPTION

The TDA1541 accepts input sample formats in time multiplexed mode or simultaneous mode with any bit length.

The most significant bit (MSB) must always be first. This flexible input data format allows easy interfacing with signal

processing chips such as interpolation filters, error correction circuits, pulse code modulation adaptors and audio signal

processors (ASP).

The high maximum input bit-rate and fast settling time facilitates application in 4 × oversampling systems (44,1 kHz to

176,4 kHz) with the associated simple analogue filtering function (low order, linear phase filter).

Input data selection (see also Table 1)

With input OB/TWC connected to ground, data input (offset binary format) must be in time multiplexed mode. It is

accompanied with a word select (WS) and a bit clock input (BCK) signal. A separate system clock input (SCK) is provided

for accurate, jitter-free timing of the analogue outputs AOL and AOR.

With OB/TWC connected to VDD the mode is the same but data format must be in two’s complement.

When input OB/TWC is connected to (VDD1) the two channels of data (L/R) are input simultaneously via (DATA L) and

(DATA R), accompanied with BCK and a latch-enable input (LE). With this mode selected the data must be in offset

binary.

The format of data input signals is shown in figures 3, 4 and 5.

True 16-bit performance is achieved by each channel using three 2-bit active dividers, operating on the dynamic element

matching principle, in combination with a 10-bit passive current-divider, based on emitter scaling. All digital inputs are

TTL compatible.

Input data selection

OB/TWC

−5 V

0V

+5 V

MODE

simultaneous

time MUX OB

time MUX TWC

PIN 1

LE

WS

WS

PIN 2

BCK

BCK

BCK

PIN 3

DATA L

DATA OB

DATA TWC

PIN 4

DATA R

SCK

SCK

Where:

LE

WS

BCK

DATA L

DATA R

DATA OB

DATA TWC

MUX OB

MUX TWC

= latch enable

= word select

= bit clock

= data left

= data right

= data offset binary

= data two’s complement

= multiplexed offset binary

= multiplexed two’s complement

November 1985

5

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