Datasheet

MAX2754
1.2GHz VCO with Linear
Modulation Input
_______________________________________________________________________________________ 3
Note 1: Specifications are production tested at T
A
= +25°C. Limits over temperature are guaranteed by design and characterization.
Note 2: Limits are guaranteed by production test at +25°C.
Note 3: Center point is nominally +1.4V.
Note 4: Maximum variation in the modulation sensitivity from its average value over the guaranteed frequency limits.
Note 5: 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.
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 50Ω 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
V
MOD
= +0.4 to +2.4V,
f
MIN
< f < f
MAX
(Note 4)
±4 %
Modulation Full-Power Bandwidth
(Note 5)
2.5 MHz
Return Loss (Note 6) f
MIN
< f < f
MAX
7.5 dB
Output Harmonics -20 dBc
Load Pulling VSWR = 2:1, all phases 1.5 MHz
p
-
p
Supply Pushing V
CC
stepped: +3.3V to +2.8V 0.16 MHz/V
Oscillator Turn-On Time (Note 7) 10 µs
Oscillator Turn-Off Time (Note 8) 8 µs