Datasheet

MAX2306/MAX2308/MAX2309
CDMA IF VGAs and I/Q Demodulators
with VCO and Synthesizer
4 _______________________________________________________________________________________
AC ELECTRICAL CHARACTERISTICS (continued)
(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.)
Note 1: FM_IQ and FM_I modes are not available on MAX2309.
Note 2: Recommended operating frequency range. Contact factory for operating frequency outside this range.
Note 3: f
1
= 183.7MHz, f
2
= 183.71MHz, P
f1
= P
f2
= -15dBm.
Note 4: f
1
= 183.7MHz, f
2
= 183.71MHz, P
f1
= P
f2
= -50dBm.
Note 5: Guaranteed by design.
Note 6: Small-signal gain at 200kHz below the LO frequency will be reduced by less than 0.25dB when an interfering signal at
1.25MHz below the LO frequency is applied at the specified level.
Note 7: f
1
= 183.7MHz, f
2
= 183.71MHz, P
f1
= P
f2
= -23dBm.
Note 8: f
1
= 183.7MHz, f
2
= 183.71MHz, P
f1
= P
f2
= -55dBm.
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX
UNITS
REF Maximum Divide Ratio
R1, R2 2047
Minimum Phase Detector
Comparison Frequency
(Note 5) 20 kHz
Maximum Phase Detector
Comparison Frequency
(Note 5)
1500
kHz
1kHz offset, T
A
= -40°C to +85°C
-79.6
12.5kHz offset, T
A
= -40°C to +85°C
-94.6
30kHz offset, T
A
= -40°C to +85°C
-105
120kHz offset, T
A
= -40°C to +85°C
-115.3
Phase Noise
900kHz offset, T
A
= -40°C to +85°C
-125
dBc/Hz
TURBO LOCK
Acquisition, CPX = XX, TC =1
1480 2100 2650
Locked, CPX = 00
105
150
190
Locked, CPX = 01
150
210
265
Locked, CPX = 10
210
300
380
Charge-Pump Source/Sink
Current
Locked, CPX = 11
300
425
530
µA
Charge-Pump Source/Sink
Matching
Locked, all values of CPX,
0.5V < V
CP
< V
CC
- 0.5V
0.2 10 %