Datasheet

MAX2306/MAX2308/MAX2309
CDMA IF VGAs and I/Q Demodulators
with VCO and Synthesizer
_______________________________________________________________________________________ 5
20.00
25.00
22.50
30.00
27.50
32.50
35.00
2.5 3.5 4.03.0 4.5 5.0 5.5
RECEIVE SUPPLY CURRENT
vs. SUPPLY VOLTAGE
MAX2306/8/9 toc01
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (mA)
T
A
= +85°C
T
A
= +25°C
T
A
= -40°C
0
0.004
0.002
0.008
0.006
0.012
0.010
0.014
2.0 3.0 3.52.5 4.0 4.5 5.0 5.5
RECEIVE SHUTDOWN CURRENT vs.
SUPPLY VOLTAGE
MAX2306/8/9 toc02
SUPPLY VOLTAGE (V)
SHUTDOWN CURRENT (mA)
T
A
= -40°C
T
A
= +25°C
T
A
= +85°C
-80
-60
-40
-20
0
20
40
60
80
0.5 1.0 1.5 2.0 2.5 3.0
GAIN vs. V
GC
MAX2306/8/9 toc03
V
GC
(V)
GAIN (dB)
T
A
= +25°C
T
A
= -40°C
T
A
= +85°C
15
25
20
35
30
40
45
55
50
60
0 100 200 300 400 500
GAIN vs. INPUT FREQUENCY
MAX2306/8/9 toc04
FREQUENCY (MHz)
GAIN (dB)
V
GC
= 2.5V
56.0
57.0
56.5
57.5
59.0
59.5
58.5
58.0
60.0
0 468102 1214161820
GAIN vs. BASEBAND FREQUENCY
MAX2306/8/9 toc05
FREQUENCY (MHz)
RELATIVE GAIN (dB)
-60
-40
-50
-20
-30
0
-10
10
-60 -20 0-40 20406080
THIRD-ORDER INPUT
INTERCEPT vs. GAIN
MAX2306/8/9 toc06
GAIN (dB)
IIP3 (dBm)
T
A
= -40°C
T
A
= +85°C
T
A
= +25°C
0
60
20
10
30
40
50
70
-40 -20 -10 0-30 10 20 5040 6030 70
NOISE FIGURE vs. GAIN
MAX2306/8/9 toc07
GAIN (dB)
NF (dB)
6.0
6.4
6.2
6.8
6.6
7.2
7.0
7.4
-40 0 20-20 406080100
NOISE FIGURE vs. TEMPERATURE
MAX2306/8/9 toc08
TEMPERATURE (°C)
NF (dB)
GAIN = 50dB
LOCK
VCO
VOLTAGE
VCO VOLTAGE vs. TIME
MAX2306/8/9 toc09
500µs/div
SHDN
LOCK TIME
1.83ms
1V/div
Typical Operating Characteristics
(MAX2306/MAX2308/MAX2309 EV kits, V
CC
= +2.75V, registers set to default power-up states, f
IN
= 183.7MHz, f
REF
= 19.2MHz,
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.)