EVAL-AD7472CB Datasheet, PDF (5/14 Pages) Analog Devices – Evaluation Board for 12-bit high speed, low power, successive-approximation ADC

EVAL-AD7472CB
HIGH SPEED CONVERTER (HSC) BOARD
INTERFACING
Interfacing to the HSC BOARD is via a 40-way connector,
J4. The pinout for the J4 connector is shown in Figure 3 and
its pin designations are given in Table III.
39
1
40
2
Figure 3. Pin Configuration for the 40-pin HSC
Interface Connector, J1
40-Way Connector Pin Description
D0-D11 Data Bit 0 to Data Bit 11. Three-state TTL
outputs. D11 is the MSB.
BUSY
BUSY. This is a logic output and is connected to
the BUSY logic output on the AD7472 via an
inverting buffer.
GND
Ground. These lines are connected to
the digital ground plane on the evaluation
board.
When interfacing to the High Speed Converter Interface
board, all required power supplies must be supplied from
external sources via the power terminal, J2.
The CLKIN signal can be generated on-board (using the
crystal oscillator or the burst clock generator circuit) or
provided externally via SK1.
The RD and CS inputs to the AD7472 must all be tied low
using LK5 and LK6 respectively.
The CONVST signal must be provided externally via SK1.
Due to the 25 MHz on-board crystal (not the maximum of
26 MHz as specified in the datasheet) the throughput rate will
not meet the maximum datasheet specification of 1.5 MSPS.
Table III. HSC Interface Connector Pin Functions.
Pin No.
Function
1
D11
3
D10
5
D9
7
D8
9
D7
11
D6
13
D5
15
D4
17
D3
19
D2
21
D1
23
D0
25
N/C
27
N/C
29
N/C
31
N/C
33
BUSY
35
N/C
37
N/C
39
N/C
N/C = Not Connected.
Pin No.
2
4
6
8
10
12
14
16
18
20
22
24
26
28
30
32
34
36
38
40
Function
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
Refer to the documentation included with the HSC-INTER-
FACE BOARD for more information. Note, the HSC-
INTERFACE BOARD was designed for other high speed
ADC devices but it is compatible with the AD7472 evalua-
tion system.
REV. A
–5–