1.2GHz VCO with Linear
Modulation Input
AC ELECTRICAL CHARACTERISTICS (continued)
(MAX2754 EV kit. V CC = +2.7V to +5.5V, V TUNE = +0.4V to +2.4V, V SHDN ≥ +2.0V, V MOD = +1.4V, OUT is connected to a 50 ? load,
T A = +25°C. Typical values are at V CC = +3.0V, T A = +25°C, unless otherwise noted.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Modulation Linearity
Modulation Full-Power Bandwidth
(Note 5)
Return Loss (Note 6)
Output Harmonics
Load Pulling
Supply Pushing
Oscillator Turn-On Time (Note 7)
Oscillator Turn-Off Time (Note 8)
V MOD = +0.4 to +2.4V,
f MIN < f < f MAX (Note 4)
f MIN < f < f MAX
VSWR = 2:1, all phases
V CC stepped: +3.3V to +2.8V
± 4
2.5
7.5
-20
1.5
0.16
10
8
%
MHz
dB
dBc
MHz p-p
MHz/V
μs
μs
Note 1:
Note 2:
Note 3:
Note 4:
Note 5:
Specifications are production tested at T A = +25°C. Limits over temperature are guaranteed by design and characterization.
Limits are guaranteed by production test at +25°C.
Center point is nominally +1.4V.
Maximum variation in the modulation sensitivity from its average value over the guaranteed frequency limits.
Bandwidth is defined as the point where the response to the modulation port is 0.707 times the low-frequency response.
Bandwidth limits on the modulation input for a 1Vp-p sine wave. Common-mode V MOD = +1.4V.
Note 6: Refer to Output Buffer section for suggestions to improve the return loss to 12dB.
Note 7: Turn-on time to within 3dB of final output power.
Note 8: Turn-off time to output power of -10dBm.
_______________________________________________________________________________________
3
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