AD9851/FSPCB Analog Devices Inc, AD9851/FSPCB Datasheet - Page 9

• Manufacturer Part Number: AD9851/FSPCB
• Description: BOARD EVAL FOR AD9851/FS
• Manufacturer: Analog Devices Inc
• Series: AgileRF™r

Specifications of AD9851/FSPCB

• Rohs Status: RoHS non-compliant
• Main Purpose: Timing, Direct Digital Synthesis (DDS)
• Utilized Ic / Part: AD9851/FS
• Secondary Attributes: -
• Embedded: -
• Primary Attributes: -

REV. D
TPC 17. Effect of DAC maximum output current on
wideband (0 to 72 MHz) SFDR at three representa-
tive DAC output frequencies: 1.1 MHz, 40.1 MHz,
and 70.1 MHz. V
and 70.1 MHz. V
and 70.1 MHz. V = 5 V, 180 MHz system clock (6
REFCLK multiplier disabled). Currents are set using
appropriate values of R
70
65
60
55
50
45
40
5
1.1MHz
40.1MHz
70.1MHz
S
S
S
S
MAXIMUM DAC I
= 5 V, 180 MHz system clock (6
10
SET
SET
SET
.
.
OUT
15
– mA
20

–9–
TPC 18. Minimum p-p input signal needed to tog-
gle the AD9851 comparator output. Comparator
input is a sine wave compared with a fixed volt-
age threshold. Use this data in addition to sin(x)/x
rolloff and any filter losses to determine whether
adequate signal is being presented to the AD9851
comparator.
600
500
400
300
200
100
0
0
20
40
INPUT FREQUENCY – MHz
V
S
60
= +3.3V
80
V
S
= +5V
100
120
AD9851
140
160