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TDA1541 데이터시트(Datasheet) 5 Page - NXP Semiconductors

부품명 TDA1541
상세내용  Dual 16-bit DAC
PDF  12 Pages
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제조사  PHILIPS [NXP Semiconductors]
홈페이지  http://www.nxp.com
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November 1985
5
Philips Semiconductors
Product specification
Dual 16-bit DAC
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
MODE
PIN 1
PIN 2
PIN 3
PIN 4
−5 V
simultaneous
LE
BCK
DATA L
DATA R
0 V
time MUX OB
WS
BCK
DATA OB
SCK
+5 V
time MUX TWC
WS
BCK
DATA TWC
SCK
Where:
LE
= latch enable
WS
= word select
BCK
= bit clock
DATA L
= data left
DATA R
= data right
DATA OB
= data offset binary
DATA TWC
= data two’s complement
MUX OB
= multiplexed offset binary
MUX TWC
= multiplexed two’s complement




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