AD9552(RevC) 데이터 시트보기 (PDF) - Analog Devices
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AD9552 Datasheet PDF : 32 Pages
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AD9552
Parameter
Input Capacitance
Input Resistance
Duty Cycle
Input Voltage
Input High Voltage, VIH
Input Low Voltage, VIL
Input Threshold Voltage
VCO CHARACTERISTICS
Frequency Range
Upper Bound
Lower Bound
VCO Gain
VCO Tracking Range
VCO Calibration Time
Min Typ Max Unit
3
pF
130
kΩ
40
60 %
Test Conditions/Comments
0.52
1.0
V
1.62 V
V
When ac coupling to the input receiver, the user must dc bias the input
to 1 V
±300
4050
3350
45
140
MHz
MHz
MHz/V
ppm
μs
fPFD7 = 77.76 MHz; time between completion of the VCO calibration
command (the rising edge of CS (Pin 12)) to the rising edge of LOCKED
(Pin 20).
1 The A[2:0], Y[5:0], and OUTSEL pins have 100 kΩ internal pull-up resistors.
2 The RESET pin has a 100 kΩ internal pull-up resistor, so the default state of the device is reset.
3 N is the integer part of the feedback divider.
4 Sigma-delta modulator.
5 The minimum allowable feedback divider value with the SDM disabled.
6 The minimum allowable feedback divider value with the SDM enabled.
7 The frequency at the input to the phase-frequency detector.
CRYSTAL INPUT CHARACTERISTICS
Table 2.
Parameter
Min Typ Max
CRYSTAL FREQUENCY
Range
10
26
52
Tolerance
20
CRYSTAL MOTIONAL RESISTANCE
100
CRYSTAL LOAD CAPACITANCE
15
Unit
MHz
ppm
Ω
pF
Test Conditions/Comments
Using a crystal with a specified load capacitance other than
15 pF (8 pF to 24 pF) is possible, but necessitates using the
SPI port to configure the AD9552 crystal input capacitance.
OUTPUT CHARACTERISTICS
Table 3.
Parameter
LVPECL MODE
Differential Output Voltage Swing
Common-Mode Output Voltage
Frequency Range
Duty Cycle
Rise/Fall Time1 (20% to 80%)
Min
Typ
Max
Unit
690
765
889
mV
VDD − 1.77 VDD − 1.66 VDD − 1.20 V
0
900
MHz
40
60
%
255
305
ps
Test Conditions/Comments
Output driver static
Output driver static
Up to 805 MHz output frequency
100 Ω termination between both pins of
the output driver
Rev. C | Page 4 of 32
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