AD9540-VCO/PCB Analog Devices Inc, AD9540-VCO/PCB Datasheet - Page 8

• Manufacturer Part Number: AD9540-VCO/PCB
• Description: BOARD EVAL CLK GEN SYNTH 48LFCSP
• Manufacturer: Analog Devices Inc

Specifications of AD9540-VCO/PCB

• Module/board Type: Evaluation Board
• For Use With/related Products: AD9540 with VCO
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

AD9540
Parameter
1
2
3
4
5
6
7
LOOP MEASUREMENT CONDITIONS
622 MHz OC-12 Clock
VCO = Sirenza 190-640T
Reference = Wenzel 500-10116 (30.3 MHz)
Loop Filter = 10 kHz BW, 60° Phase Margin
C1 = 170 nF, R1 = 14.4 Ω, C2 = 5.11 µF, R2 = 89.3 Ω,
C3 Omitted
CP_OUT = 4 mA (Scaler = ×8)
÷R = 2, ÷M = 1, ÷N = 1
The SNR of a 14-bit ADC was measured with an ENCODE rate of 105 MSPS and an AIN of 170 MHz. The resultant SNR was known to be limited by the jitter of the clock,
not by the noise on the AIN signal. From this SNR value, the jitter affecting the measurement can be back calculated.
Driving the REFIN input buffer. The crystal oscillator section of this input stage performs up to only 30 MHz.
The charge pump output compliance range is functionally 0.2 V to (CP_VDD − 0.2 V). The value listed here is the compliance range for 5% matching.
The input impedance of the CLK1 input is 1500 Ω. However, to provide matching on the clock line, an external 50 Ω load is used.
Measured as peak-to-peak between DAC outputs.
For a 4.02 kΩ resistor from DRV_RSET to GND.
Assumes a 1 mA load.
51.84 MHz F
105 MHz Analog Out
155.52 MHz Analog Out
@ 10 Hz Offset
@ 100 Hz Offset
@ 1 kHz Offset
@ 10 kHz Offset
@ 100 kHz Offset
> 1 MHz Offset
@ 10 Hz Offset
@ 100 Hz Offset
@ 1 kHz Offset
@ 10 kHz Offset
@ 100 kHz Offset
>1 MHz Offset
@ 10 Hz Offset
@ 100 Hz Offset
@ 1 kHz Offset
@ 10 kHz Offset
@ 100 kHz Offset
>1 MHz Offset
OUT
Min
Rev. A | Page 8 of 32
Typ
110
121
135
142
148
153
105
115
126
132
140
145
100
112
123
131
138
144
Max
105 MHz Converter Clock
VCO = Sirenza 190-845T
Reference = Wenzel 500-10116 (30.3 MHz)
Loop Filter = 10 kHz BW, 45° Phase Margin
C1 = 117 nF, R1 = 28 Ω, C2 = 1.6 µF, R2 = 57.1 Ω, C3 = 53.4 nF
CP_OUT = 4 mA (Scaler = ×8)
÷R = 8, ÷M = 1, ÷N = 1
INPUT
Unit
dBc/Hz
dBc/Hz
dBc/Hz
dBc/Hz
dBc/Hz
dBc/Hz
dBc/Hz
dBc/Hz
dBc/Hz
dBc/Hz
dBc/Hz
dBc/Hz
dBc/Hz
dBc/Hz
dBc/Hz
dBc/Hz
dBc/Hz
dBc/Hz
C1
Figure 2. Generic Loop Filter
C2
R1
Test Conditions/Comments
R2
C3
OUTPUT