參數(shù)資料
型號: AD9851BRSRL
廠商: Analog Devices Inc
文件頁數(shù): 23/24頁
文件大小: 0K
描述: IC DDS/DAC SYNTHESIZER 28-SSOP
產(chǎn)品培訓模塊: Direct Digital Synthesis Tutorial Series (1 of 7): Introduction
Direct Digital Synthesizer Tutorial Series (7 of 7): DDS in Action
Direct Digital Synthesis Tutorial Series (3 of 7): Angle to Amplitude Converter
Direct Digital Synthesis Tutorial Series (6 of 7): SINC Envelope Correction
Direct Digital Synthesis Tutorial Series (4 of 7): Digital-to-Analog Converter
Direct Digital Synthesis Tutorial Series (2 of 7): The Accumulator
標準包裝: 1,500
分辨率(位): 10 b
主 fclk: 180MHz
調節(jié)字寬(位): 32 b
電源電壓: 2.7 V ~ 5.25 V
工作溫度: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 28-SSOP(0.209",5.30mm 寬)
供應商設備封裝: 28-SSOP
包裝: 帶卷 (TR)
AD9851
–8–
FREQUENCY OFFSET – Hz
–155
100
MAGNITUDE
dBc/Hz
1k
10k
100k
–145
–140
–135
–130
–125
–120
AD9851 RESIDUAL PHASE NOISE
–150
TPC 11. Output Residual Phase Noise (5.2 MHz AOUT), 6
OUT
REFCLK Multiplier Disabled, System Clock = 180 MHz, Ref-
erence Clock = 180 MHz
SYSTEM CLOCK FREQUENCY – MHz
45
10
SFDR
dBc
20
40
60
80
100 120 140 160 180
50
55
60
65
70
75
VS = +3.3V
VS = +5V
FUNDAMENTAL OUTPUT =
SYSTEM CLOCK/3
TPC 12. Spurious-free dynamic range (SFDR) is generally
a function of the DAC analog output frequency. Analog
output frequencies of 1/3 the system clock rate are consid-
ered worst case. Plotted below are typical worst case SFDR
numbers for various system clock rates.
1
Ch1 100mV
T [ ]
Tek Stop 2.50GS/s
22 Acgs
: 2.0ns
@ : 105.2ns
C1 Rise
2.03ns
M 20.0ns Ch 1
252mV
D 5.00ns Runs After
TPC 13. Comparator RiseTime, 15 pF Load
1
Ch1 100mV
T [
]
Tek Stop 2.50GS/s
2227 Acgs
: 2.3ns
@ : 103.6ns
C1 Fall
2.33ns
M 20.0ns Ch 1
252mV
D 5.00ns Runs After
TPC 14. Comparator FallTime, 15 pF Load
ANALOG OUTPUT FREQUENCY – MHz
30
10
SUPPLY
CURRENT
m
A
20
30
40
50
60
0
70
50
70
80
90
110
120
VS = +3.3V
VS = +5V
100
60
40
output frequency at 180 MHz system clock (upper
trace) and 125 MHz system clock (lower trace)
SYSTEM CLOCK – MHz
0
140
SUPPLY
CURRENT
m
A
20
40
60
100
80
120
0
20
40
60
80
100
120
VS = +3.3V
VS = +5V
160
180
clock frequency
REV. D
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