AD9218-40 Analog Devices, AD9218-40 Datasheet - Page 17

• Manufacturer Part Number: AD9218-40
• Manufacturer: Analog Devices

Data Outputs
The ADC digital outputs are latched on the board by two
LCX821s, the latch outputs are available at the two 40-pin
connectors at Pins 23–33 on P3 (Channel A) and Pins 23–33 on
P4 (Channel B). The latch output clocks (data ready) are avail-
able at Pin 4 on P3 (Channel A) and Pin 4 on P4 (Channel B).
The data ready signal on Channel B can be aligned with Clock
A input by connecting E43–E42 or aligned with Clock B input
by connecting E42–E33.
#
1
2
3
6
7
8
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
NOTE
R22, R23, R24, R30, R32, R33, R35, R36, R38, R39, R40, C2, C36 not placed on board.
Qty
29
2
7
8
3
2
8
10
2
6
2
2
8
2
2
1
2
1
2
4
2
CH1
2.00V CH2 2.00V M 10.0ns
PIN 37 (CLOCK)
REFDES
C1, C3–C15, C20–C25, C27–C35
C2, C36
C16, C17, C18, C19, C26, C37, C38
J1, J2, J3, J4, J5, J6, J7, J8
P1, P4, P11
P2, P3
R1–R4, R22–R24, R30
R5–R12, R34, R37
R13, R14
R15, R17, R18, R26, R29, R31
R16, R25
R19, R27
R20, R32, R33, R35, R36, R38–R40
R21, R28
T1, T2
U1
U2, U3
U4
U5, U6
U7, U8, U9, U10
U11, U12
T
PIN 31 (DATA)
CH4
40mV
PCB Bill of Materials
Device
Capacitor
Capacitor
Capacitor
Connector
4-Pin Power Connector
HEADER40
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
Transformer
AD9218
74LCX821
AD9763
74LCX86
Resistor Array
AD8138
DAC Outputs
Each channel is reconstructed by an on-board dual channel DAC,
an AD9763. This DAC is intended to assist in debug only. It
should not be used to measure the performance of the ADC.
It is a current output DAC with on-board 50 Ω termination
resistors. Figure 16 is representative of the DAC output with a
full-scale analog input. The scope setting was low bandwidth,
50 Ω termination.
1
CH1
500mV
Package
0603
0603
TAJD
SMB
0603
0603
0603
0603
0603
0603
0603
0603
ADT-1-1WT
LQFP48
SO24M3
LQFP48
SO14
CTS20
SO8NB
TB4
M 50.0ns CH1
T
380mV
AD9218
Value
0.1 µF
15 pF
10 µF
Wieland
25.531.3425.0
Z5.602.5453.0
25 Ω
50 Ω
2 kΩ
500 Ω
525 Ω
4 kΩ
0 Ω
1 kΩ
Minicircuits
22 Ω