cs5317 Cirrus Logic, Inc., cs5317 Datasheet - Page 28

• Manufacturer Part Number: cs5317
• Description: 16-bit, 20 Khz Oversampling A/d Converter
• Manufacturer: Cirrus Logic, Inc.

the board and then connected to the V
supply pins of the chip. The +5 V and -5V are
then connected by means of ten
V
ing is provided on all supply pins of the chip. In
addition there is a 0.1
nected from the REFBUF pin of the chip to the
V
To properly operate, the CS5317 chip requires an
external (5 V CMOS compatible) clock. A BNC
connector labeled CLKIN is provided to connect
the off-board clock signal to the board. The
CLKIN signal is also available on the 40 pin
header connector. The CLKIN signal is one input
UNUSED GATES
VL
VL
28
D
A
+ and V
- supply pin.
VL
VL
11
13
12
11
1
3
9
CL
D
U5
D
S
U4
R
- pins respectively. Capacitive filter-
13
10
10
12
2
4
8
Q
Q
9
8
DOUT
(fig. 2)
CLKOUT
(fig. 2)
DATA
(fig. 2)
F filter capacitor con-
Figure 3. Buffers and Parallel Handshake Flip-Flop
1
resistors to the
3
11
V L
14
7
A
+ and V
2
U1
4
10
13
C1
0.1 F
A
-
5
9
12
to the phase detector of the on-chip phase locked
loop of the CS5317.
Header connector P2 (see Figure 2) is provided to
allow mode selection for the CS5317 chip. The
mode selection works together with the CLKIN
signal to set the sample rate and the output word
rate of the CS5317. See the CS5317 data sheet
for details on mode selection. Two of the avail-
able modes (CLKG1 and CLKG2) utilize the
on-chip phase locked loop to step up the CLKIN
frequency to obtain the necessary sample rate
clock for the A/D converter. Another mode (the
CLKOR mode) does not use the on-chip PLL but
instead drives the sample function directly. The
6
8
2
3
14
7
CL
GND R
V L
D
74HC74
4
U4
S
Q
Q
0.1 F
6
C11
5
6
C10
0.1 F
D
7
V L
U5
14
CDB5317
5
TP2
V L
R4
10k
TP3
DOUT2
(fig. 6)
DRDY
(fig. 6)
DACK
(fig. 6)
CLKOUT
(fig. 6)
CLKOUT2
(fig. 6)
DATA 1
(fig. 6)
DATA
(fig. 6)
DS27DB3