PL500-37 Datasheet, PDF (4/6 Pages) Micrel Semiconductor – Low Phase Noise VCXO (36MHz to 130MHz)

(Preliminary )P L 5 0 0 -3 7
Low Phase Noise VCXO (36MHz to 130MHz)
4. Voltage Control Crystal Oscillator
PARAMETERS
SYMBOL
CONDITIONS
MIN. TYP. MAX. UNITS
VCXO Stabilization Time *
VCXO Tuning Range
T_VCXOSTB
From power valid
F_XIN = 36 – 130MHz;
XTAL C₀/C₁ < 250
0V  V_CON  3.3V
10
ms
300
ppm
CLK output pullability
VCXO Tuning Characteristic
V_CON=1.65V, 1.65V
150
100
ppm
ppm/V
Pull range linearity
5
%
Power Supply Rejection
PWSRR
Frequency change with
V_DD varied +/- 10%
-1
VCON pin input impedance
5000
+1
ppm
kΩ
VCON modulation BW
0V  V_CON  3.3V, -3dB
25
kHz
Note: Parameters denoted with an asterisk (*) represent nominal characterization data and are not production tested to any specific limi ts.
5. Crystal Specifications
PARAMETERS
SYMBOL
CONDITIONS
MIN. TYP. MAX. UNITS
Crystal Resonator Frequency
Crystal Loading Rating
Maximum Sustainable
Drive Level
F_XIN
C_{L (xtal)}
(see note
below)
VCON = 1.65V, 3.3 V
VCON = 1.25V, 2.5V
36
130 MHz
5.1
pF
5.7
200
Operating Drive Level
50
Max C0
2.5 pF
C0/C1
250
-
C0 ≤ 2.0pF, F_XIN up to 85MHz
C0 ≤ 2.5pF, F_XIN up to 80MHz
30
C0 ≤ 3.0pF, F_XIN up to 75MHz
C0 ≤ 2.0pF, F_XIN up to 95MHz
C0 ≤ 2.5pF, F_XIN up to 90MHz
25
ESR
R_S
C0 ≤ 3.0pF, F_XIN up to 85MHz
C0 ≤ 2.0pF, F_XIN up to 110MHz
C0 ≤ 2.5pF, F_XIN up to 105MHz
20
C0 ≤ 3.0pF, F_XIN up to 100MHz
C0 ≤ 2.0pF, F_XIN up to 130MHz
C0 ≤ 2.5pF, F_XIN up to 120MHz
15
C0 ≤ 3.0pF, F_XIN up to 115MHz
Note: The crystal must be such that it oscillates (parallel resonant) at nominal frequency when presented a C Load as specified above.
If the crystal requires more load to be at nominal frequency, the additional load must be added externally. This ho wever may reduce the pull range.
Note that the Cload values above are for the IC only, and do not include PCB parasitics. Crystal specifications for Cload include PCB paras itics.
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel [phone] • fax [phone] • www.micrel.com Rev 09/09/05 Page 4