CDMA IF VGAs and I/Q Demodulators
with VCO and Synthesizer
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
= 10k ? , all power levels referred to 50 ? , T A = +25°C, unless otherwise noted.)
RECEIVE SUPPLY CURRENT
RECEIVE SHUTDOWN CURRENT vs.
35.00
32.50
vs. SUPPLY VOLTAGE
0.014
0.012
SUPPLY VOLTAGE
80
60
GAIN vs. V GC
30.00
27.50
T A = +85 ° C
T A = +25 ° C
0.010
0.008
T A = +25 ° C
T A = +85 ° C
40
20
0
T A = +25 ° C
25.00
22.50
T A = -40 ° C
0.006
0.004
0.002
T A = -40 ° C
-20
-40
-60
T A = -40 ° C
T A = +85 ° C
20.00
0
-80
2.5
3.0
3.5
4.0
4.5
5.0
5.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
0.5
1.0
1.5
2.0
2.5
3.0
SUPPLY VOLTAGE (V)
GAIN vs. INPUT FREQUENCY
SUPPLY VOLTAGE (V)
GAIN vs. BASEBAND FREQUENCY
V GC (V)
THIRD-ORDER INPUT
INTERCEPT vs. GAIN
60
60.0
10
T A = -40 ° C
55
50
45
40
35
V GC = 2.5V
59.5
59.0
58.5
58.0
0
-10
-20
-30
T A = +25 ° C
T A = +85 ° C
30
57.5
25
20
15
57.0
56.5
56.0
-40
-50
-60
0
100
200
300
400
500
0
2
4
6
8
10 12 14 16 18 20
-60
-40
-20
0
20
40
60
80
FREQUENCY (MHz)
NOISE FIGURE vs. GAIN
FREQUENCY (MHz)
NOISE FIGURE vs. TEMPERATURE
GAIN (dB)
VCO VOLTAGE vs. TIME
70
60
7.4
7.2
GAIN = 50dB
MAX2306/8/9 toc09
SHDN
VCO
50
40
30
20
10
7.0
6.8
6.6
6.4
6.2
LOCK TIME
1.83ms
VOLTAGE
1V/div
LOCK
0
-40 -30 -20 -10 0 10 20 30 40 50 60 70
6.0
-40
-20
0
20
40
60
80
100
500 μ s/div
GAIN (dB)
TEMPERATURE (°C)
_______________________________________________________________________________________
5
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相关代理商/技术参数
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MAX230CWP+T 功能描述:RS-232接口集成电路 5V MultiCh RS-232 Driver/Receiver RoHS:否 制造商:Exar 数据速率:52 Mbps 工作电源电压:5 V 电源电流:300 mA 工作温度范围:- 40 C to + 85 C 安装风格:SMD/SMT 封装 / 箱体:LQFP-100 封装:
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