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UM023 FMC230 User Manual
Card Type
FMC230
Note: Higher DAC clock frequencies (2850MHz for sampling up to 5700Msps) can be
achieved using external clock.
V Supply
V+
F out
Gnd
Reference
30.7MHz
4.10 Power supply
Power is supplied to the FMC card through the FMC connector. The pin current rating is 2.7A,
CPRset
5.10k
but the overall maximum is limited according to Table 4.
Voltage
+3.3V
+12V
VADJ
VIO_B (VADJ)
The power provided by the carrier card can be very noisy. Special care is taken with the power
supply generation on the FMC card to minimize the effect of power supply noise on clock
generation and data conversion.
Clean +1.8V is derived from +3.3V with linear regulators. Clean +3.3V is derived from +12V in
two steps for maximum efficiency. The first step uses a highly efficient switched regulator to
generate a +3.8V power rail. From this power rail each analog supply is derived with separate
low dropout, low noise, and linear regulators.
The regulators have sufficient copper area to dissipate the heat in combination with proper
airflow (see section 6.3 Cooling).
UM023
Device
VCO Range
AD9517-1
2300MHz - 2650MHz
Table 3: FMC default clock configurations
8
4
LF
CP
11
CLK
12
/CLK
9
Bypass
220nF
AD9517-X
48
REFIN
47
2
/REFIN
LD
Figure 6: Loop filter design
42
OUT 0
41
/OUT 0
39
OUT 1
46
38
CP Rset
/OUT 1
19
OUT 2
20
/OUT 2
22
OUT 3
23
/OUT 3
44
Rset
35
OUT 4
34
Rset
/OUT 4
4.12k
33
OUT 5
32
/OUT 5
26
OUT 6
27
/OUT 6
28
OUT 7
29
/OUT 7
Table 4: FMC standard power specification
www.4dsp.com
VCO
2457.60MHz
R2
R1
2.00k
1.00k
C1
330pF
C2
4.70nF
# Pins
Max Amps
4
3 A
2
1 A
Notes AD9517:
1. Consult manufacturer's data
sheet for full details
4
4 A
2
1.15 A
DAC Clock
2457.60MHz
C3
150pF
Max Watt
10 W
12 W
10 W
2.3 W
r1.11
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