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參數(shù)資料
| 型號： | AD809 |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | 155.52 MHz Frequency Synthesizer(頻率合成器) |
| 中文描述： | 155.52兆赫頻率合成器（頻率合成器） |
| 文件頁數(shù)： | 3/8頁 |
| 文件大?。?/td> | 265K |
| 代理商： | AD809 |
AD809
REV. A
–3–
Table I.
MUX Input
Input Selected
TTL “0”
TTL “1”
CLKIN/CLKINN
PECLIN/PECLINN
Table II. Applying a PECL/ECL or CMOS/TTL Reference
Input to the AD809
Input Reference
AD809 Configuration
PECL/ECL Differential
Apply the valid PECL–level reference
frequency to Pins 13 and 12.
AD809 frequency synthesizer ignores
the input at Pin 10.
TTL/CMOS
Single-Ended
Apply the reference frequency to
Pin 10.
Connect Pins 13 and 12 to AV
EE
(Pins 9 and 16). The AD809 senses
the common-mode signal at these pins
as less than valid PECL and selects the
TTL/CMOS input as active.
AD809 Phase Skew
The AD809 output is in phase with the input. The falling edge
at Pin 4, CLKOUTN, occurs 700 ps before the rising edge at
Pin 10, TTL/CMOSIN at 27
°
C. The phase skew remains rela-
tively constant over temperature. Refer to Table III for phase
skew data.
Table III. Phase Skew vs. Temperature
Skew (CLKOUTN, Pin 4, Relative to
TTL/CMOSIN, Pin 10 Measured in
ps at Package Pins)
Temperature
(
8
C)
–35
–20
0
10
30
50
70
80
90
100
–1000
–950
–850
–750
–700
–600
–450
–450
–350
–250
PIN DESCRIPTIONS
Pin
No.
Mnemonic
Description
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
PECLINN
PECLIN
V
CC2
CLKOUTN
CLKOUT
V
CC1
CF1
CF2
AV
EE
TTL/CMOSIN TTL/CMOS Reference Clock Input
AV
CC1
Analog V
CC
for PLL
CLKINN
PECL Differential Reference Clock Input
CLKIN
PECL Differential Reference Clock Input
AV
CC2
Analog V
CC
for Input Stage
MUX
Input Signal Mux Control Input
V
EE
Digital V
EE
Differential 155 MHz Input
Differential 155 MHz Input
Digital V
CC
for PECL Outputs
Differential 155 MHz Output
Differential 155 MHz Output
Digital V
CC
for Internal Logic
Loop Damping Capacitor
Loop Damping Capacitor
Analog V
EE
PIN CONFIGURATION
14
13
12
11
16
15
10
9
8
1
2
3
4
7
6
5
TOP VIEW
(Not to Scale)
AD809
PECLINN
CLKIN
AV
CC2
MUX
V
EE
PECLIN
V
CC2
CLKOUTN
TTL/CMOSIN
AV
CC1
CLKINN
CLKOUT
V
CC1
CF1
CF2
AV
EE
WARNING!
ESD SENSITIVE DEVICE
CAUTION
ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily
accumulate on the human body and test equipment and can discharge without detection.
Although the AD809 features proprietary ESD protection circuitry, permanent damage may
occur on devices subjected to high energy electrostatic discharges. Therefore, proper ESD
precautions are recommended to avoid performance degradation or loss of functionality.
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