Datasheet

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PCM1738
SBAS174C – FEBRUARY 2002 – REVISED FEBRUARY 2007
Table 1. TERMINAL FUNCTIONS
TERMINAL
TYPE DESCRIPTION
NAME NO.
AGND1 18 — Analog ground 1
AGND2 27 — Analog ground 2
CS 14 IN Chip select and latch for mode control
(1)
BCK 6 IN Bit-clock input. Connected to GND for DSD mode
(1)
DATA 5 IN Serial audio data input for normal operation. L-channel audio data input for external DF and DSD modes
(1)
DGND 8 — Digital ground
I
OUT
L+ 25 OUT L-channel analog current output +
I
OUT
L– 26 OUT L-channel analog current output –
I
OUT
R+ 17 OUT R-channel analog current output +
I
OUT
R– 16 OUT R-channel analog current output –
I
REF
21 — Output current reference bias pin. Connect 16-k Ω resistor to GND.
Left/right clock (f
S
) input for normal operation. WDCK clock input in external DF mode. Connected to GND in
LRCK 4 IN
DSD mode
(1)
MC 13 IN Shift clock for mode control
(1)
MDI 12 IN Serial data input for mode control
(1)
MDO 11 OUT Serial data output for mode control
Analog output mute control for normal operation. R-channel audio data input for external DF and DSD modes
MUTE 15 IN
(1)
RST 1 IN Reset
(1)
SCKI 7 IN System-clock input for normal operation. BCK (64f
S
) clock input for DSD mode
(1)
SCKO 10 OUT System clock output
V
CC
1 23 — Analog power supply 1, 5-V
V
CC
2 24 — Analog power supply 2, 5-V
V
CC
3 28 — Analog power supply 3, 5-V
V
COM
1 19 — Internal bias decoupling 1
V
COM
2 20 — Internal bias decoupling 2 (common voltage for I/V)
V
COM
3 22 — Internal bias decoupling 3
V
DD
9 — Digital supply, 3.3 V
ZEROL 2 OUT Zero flag for L-channel
ZEROR 3 OUT Zero flag for R-channel
(1) Schmitt-trigger input, 5-V tolerant.
6
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