参数资料
型号: AD9522-4/PCBZ
厂商: Analog Devices Inc
文件页数: 6/84页
文件大小: 0K
描述: BOARD EVAL FOR AD9522-4 CLK GEN
设计资源: AD9522 Eval Board Schematic
AD9522 BOM
标准包装: 1
主要目的: 计时,时钟发生器
嵌入式:
已用 IC / 零件: AD9522-4
主要属性: 12 LVDS/24 CMOS 输出,1.6 GHz VCO
次要属性: I²C & SPI 接口
已供物品:
AD9522-4
Rev. 0 | Page 14 of 84
PD, SYNC, AND RESET PINS
Table 15.
Parameter
Min
Typ
Max
Unit
Test Conditions/Comments
INPUT CHARACTERISTICS
Each of these pins has a 30 kΩ internal pull-up resistor
Logic 1 Voltage
2.0
V
Logic 0 Voltage
0.8
V
Logic 1 Current
1
μA
Logic 0 Current
110
μA
The minus sign indicates that current is flowing out of
the AD9522, which is due to the internal pull-up resistor
Capacitance
2
pF
RESET TIMING
Pulse Width Low
50
ns
RESET Inactive to Start of Register Programming
100
ns
SYNC TIMING
Pulse Width Low
1.3
ns
High speed clock is CLK input signal
SERIAL PORT SETUP PINS: SP1, SP0
Table 16.
Parameter
Min
Typ
Max
Unit
Test Conditions/Comments
SP1, SP0
These pins do not have internal pull-up/pull-down resistors
Logic Level 0
0.25 × VS
V
VS is the voltage on the VS pin
Logic Level
0.4 × VS
0.65 × VS
V
User can float these pins to obtain Logic Level ; if floating this pin, user
should connect a capacitor to ground
Logic Level 1
0.8 × VS
V
LD, STATUS, AND REFMON PINS
Table 17.
Parameter
Min
Typ
Max
Unit
Test Conditions/Comments
OUTPUT CHARACTERISTICS
When selected as a digital output (CMOS); there are other
modes in which these pins are not CMOS digital outputs;
see Table 52, 0x017, 0x01A, and 0x01B
Output Voltage High, VOH
2.7
V
Output Voltage Low, VOL
0.4
V
MAXIMUM TOGGLE RATE
100
MHz
Applies when mux is set to any divider or counter output,
or PFD up/down pulse; also applies in analog lock detect
mode; usually debug mode only; beware that spurs can
couple to output when any of these pins are toggling
ANALOG LOCK DETECT
Capacitance
3
pF
On-chip capacitance; used to calculate RC time constant
for analog lock detect readback; use a pull-up resistor
REF1, REF2, AND VCO FREQUENCY STATUS MONITOR
Normal Range
1.02
MHz
Frequency above which the monitor indicates the
presence of the reference
Extended Range
8
kHz
Frequency above which the monitor indicates the
presence of the reference
LD PIN COMPARATOR
Trip Point
1.6
V
Hysteresis
260
mV
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