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EVAL-AD7472CB Datasheet(PDF) 4 Page - Analog Devices

No. de Pieza. EVAL-AD7472CB
Descripción  Evaluation Board for 12-bit high speed, low power, successive-approximation ADC
Descarga  14 Pages
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Fabricante  AD [Analog Devices]
Página de inicio  http://www.analog.com
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EVAL-AD7472CB Datasheet(HTML) 4 Page - Analog Devices

 
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EVAL-AD7472CB
–4–
REV. A
EVAL-CONTROL BOARD INTERFACING
Interfacing to the EVAL-CONTROL BOARD is via a 96-
way connector, J1. The pinout for the J1 connector is shown
in Figure 2 and its pin designations are given in Table II.
1
32
1
32
A
B
C
Figure 2. Pin Configuration for the 96-Way
Connector, J1
96-Way Connector Pin Description
D0-D11
Data Bit 0 to Data Bit 11. Three-state TTL
outputs. D11 is the MSB.
SCLK0
Serial Clock Zero. This continuous clock can be
connected to the CLKIN pin of the AD7472 via
LK3.
+5VD
Digital +5 V supply. This can be used to provide
a separate +5 V supply for the digital logic if
required via LK2.
RD
Read. This is an active low logic input connected
to the
RD pin of the AD7472 via LK5.
CS
Chip Select. This is an active low logic input
connected to the
CS pin of the AD7472 via LK6.
F L 0
Flag zero. This logic input is connected to the
CONVST input of the AD7472 via LK4.
IRQ2
Interrupt Request 2. This is a logic output and is
connected to the BUSY logic output on the
AD7472.
DGND
Digital Ground.
These lines are connected to
the digital ground plane on
the evaluation
board. It allows the user to provide the digital
supply via the connector along with the other
digital signals.
AGND
Analog Ground. These lines are connected to
the analog ground plane on the evaluation
board.
AVSS
Negative Supply Voltage. This provides a nega-
tive supply to the on-board op-amps via LK9.
AVDD
Positive Supply Voltage. This provides a positive
supply to the op-amps, the reference, the AD7472
and the digital logic.
When interfacing directly to the EVAL-CONTROL BOARD,
all power supplies and control signals are generated by the
EVAL-CONTROL BOARD. However, due to the nature of
the DSP interface on the EVAL-CONTROL BOARD,
AD7472 sampling rates greater than 400 KHz are not
supported when interfacing the EVAL-AD7472CB directly
to the EVAL-CONTROL BOARD. To achieve sample rates
greater than 400 KHz, the HSC-INTERFACE BOARD
must be used. The HSC-INTERFACE BOARD is a board
designed to interface between evaluation boards for high
speed analog-to-digital converters and the EVAL-CON-
TROL BOARD. It can be ordered from Analog Devices
through the normal channels using the part number "HSC-
INTERFACE BOARD".
Table II. 96-Way Connector Pin Functions.
ROW A
ROWB
ROWC
1
2D 0
3D 1
4
DGND
DGND
DGND
5D 2
6D 3
7
SCLK0
D 4
SCLK0
8
+5VD
+5VD
+5VD
9
RD
D5
10
D 6
CS
11
D 7
12
DGND
DGND
DGND
13
D 8
14
D 9
15
D10
16
DGND
DGND
DGND
17
FL0
D11
IRQ2
18
19
20
DGND
DGND
DGND
21
AGND
AGND
AGND
22
AGND
AGND
AGND
23
AGND
AGND
AGND
24
AGND
AGND
AGND
25
AGND
AGND
AGND
26
AGND
AGND
AGND
27
AGND
28
AGND
29
AGND
AGND
AGND
30
AGND
31
AVSS
AVSS
AVSS
32
AVDD
AVDD
AVDD
Note : The unused pins of the 96-way connector are not shown.


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