Datasheet

MAX2306/MAX2308/MAX2309
CDMA IF VGAs and I/Q Demodulators
with VCO and Synthesizer
_______________________________________________________________________________________ 3
AC ELECTRICAL CHARACTERISTICS
(MAX2306/MAX2308/MAX2309 EV kit, V
CC
= +2.75V, registers set to default power-up states except M1 = M2 = 306, R1 = R2 = 16,
f
IN
= 183.7MHz, f
REF
= 19.2MHz, 0.6Vp-p synthesizer locked with passive 3rd-order lead-lag loop filter, SHDN = high, VGC set for
+35dB voltage gain, differential output load = 10kΩ, all power levels referred to 50Ω, T
A
= +25°C, unless otherwise noted.)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Input Frequency f
IN
(Note 2) 40 300
MHz
Reference Frequency f
REF
39
MHz
Frequency Reference Signal
Level
V
REF
0.2
Vp-p
SIGNAL PATH, CDMA MODE
Gain = -35dB, (Note 3) 3.4
Input 3rd-Order Intercept IIP3
Gain = +35dB, T
A
= -40°C to +85°C
(Notes 4, 5)
-38
-31.0
dBm
Gain = -35dB -9
Input 1dB Compression P
1dB
Gain = +35dB -44
dBm
Gain = -35dB
-14.8
Input 0.25dB Desensitization (Note 6)
Gain = +35dB -49
dBm
Minimum Voltage Gain A
V
V
VGC
= 0.5V (Note 5) -56 -51 dB
Maximum Voltage Gain A
V
V
VGC
= 2.3V (Note 5) 57 61 dB
Gain = -35dB
62.9
DSB Noise Figure NF
Gain = +35dB
6.36
dBm
SIGNAL PATH, FM_IQ MODE
Gain = -35dB, (Note 7)
-6.5
Input 3rd-Order Intercept IIP3
Gain = +35dB, T
A
= -40°C to +85°C
(Notes 5, 8)
-40.2
-32
dBm
Gain = -35dB -20
Input 1dB Compression P
1dB
Gain = +35dB -44
dBm
Minimum Voltage Gain A
V
V
VGC
= 0.5V (Note 5)
-56.7
-52 dB
Maximum Voltage Gain A
V
V
VGC
= 2.3V (Note 5) 56
59.5
dB
SIGNAL PATH, CDMA AND FM_IQ MODE
Gain Variation Over Temperature
Normalized to +25°C
±2.5
dB
Baseband 0.5dB Bandwidth 4.2
MHz
Quadrature Suppression T
A
= -40°C to +85°C (Note 5) 28 40 dB
LO to Baseband Leakage 1
mVp-p
Saturated Output Level V
SAT
Differential 2.7
Vp-p
PHASE-LOCKED LOOP
F
VCO
_
L
(Note 2) 80 300
VCO Tune Range
F
VCO
_
H
(Note 2)
135
600
MHz
LO_OUT Output Power P
LO
R
L
= 50Ω, BUFEN = low
-13.7
dBm
VCO Minimum Divide Ratio
M1, M2
256
VCO Maximum Divide Ratio
M1, M2 16383
REF Minimum Divide Ratio
R1, R2
2