AD9432/PCB Analog Devices, AD9432/PCB Datasheet - Page 12

• Manufacturer Part Number: AD9432/PCB
• Description: 12-Bit/ 80 MSPS/105 MSPS A/D Converter
• Manufacturer: Analog Devices

AD9432
DAC
The evaluation board has an on board reconstruction DAC
(AD9752). This is placed only to facilitate testing and debug of
the board. It should not be used to measure the performance of
the ADC, as it will not accurately indicate the ADC performance.
The DAC output is available at SMB P1. It will drive a 50
load. Provision to power-down the DAC is at Pin 15 at the DAC.
PCB LAYOUT
The PCB is designed on a four-layer (1 oz. Cu) board. Compo-
nents and routing are on the top layer with a ground flood for
additional isolation. Test and ground points were judiciously
placed to facilitate high-speed probing. A common ground plane
exists on the second layer. The third layer has three split power
planes, two for the ADC and one for support logic. The DAC,
components, and routing are located on the bottom layer.
#
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
Quantity
30
1
4
1
18
3
1
2
6
2
4
2
4
1
1
1
2
1
2
1
2
3
REFDES
C1–C8, C10–C13, C17, C19–C22,
C27–C29, C41, C42, C47, C48,
C53, C56, C58, C60, C61, C70
C9
C14, C18, C31, C34
C15
E1–E13, E30, E32, E40, E42, E43
P1, P2, P3
P7
P30, P40
R1, R2, R7, R8, R10, R18
(R1, R2, R10 Optional)
R3, R35
R25, R26, R31, R32
R6, R24
RP1–RP4
T1
U1
U2
U3, U4
U9
U12–U13
Z1
Z2, Z3
R4, R5, R15
PCB Bill of Materials
RES PAK
Device
Capacitor
Capacitor
Capacitor
Capacitor
E-HOLE
Connector
37-Pin Connector
Power Connector
Resistor
Resistor
Resistor
Resistor
Transformer
DAC
Reference (Not Supplied)
Inverter (U4 Not Supplied)
ADC
Latch
PECL/TTL Translator
Differential Receiver
Resistor
TROUBLESHOOTING
If the board does not seem to be working correctly, try the
following:
• Verify power at IC pins.
• Check that all jumpers are in the correct position for the
• Verify VREF is at 2.5 V.
• Try running encode clock and analog inputs at low speeds
The AD9432 Evaluation Board is provided as a design example
for customers of Analog Devices, Inc. ADI makes no warranties,
express, statutory, or implied, regarding merchantability or fitness
for a particular purpose.
desired mode of operation.
(10 MSPS/1 MHz) and monitor 574 outputs, DAC output,
and ADC outputs for toggling.
Package
603
603
CAPTAJD
CAPTAJD
Test Point
SMB
Female
1206
1206
1206
1206
SOIC
SOIC
SC70
52QFP
SOIC
SOIC
SOIC
1206
Value
0.01 F
10 F
AMP 747462-2
50
100
500
2 k
100
24.9
0.1 F
1 F
Mini-Circuits
ADT1-1WT
AD9752
AD780N
NC7SZ04P5
AD9432
74AC574M
MC100ELT23
MC10EL16