參數(shù)資料
型號(hào)： P11997EJ2V0AN00
英文描述： uPC2757. uPC2758. and uPC8112. 3-V Power Supply. 1.9-GHz Frequency Down-converter ICs for Mobile Communication
中文描述： uPC2757。 uPC2758。和uPC8112。 3 - V單電源供電。 1.9 - GHz的頻率下，移動(dòng)通信轉(zhuǎn)換器IC
文件頁(yè)數(shù)： 13/51頁(yè)
文件大小： 265K
代理商： P11997EJ2V0AN00
Application Note P11997EJ2V0AN00
13
4.
APPLICATION CIRCUITS AND CHARACTERISTICS
In this series, according to the measuring circuit in the data sheet, the electrical characteristics specified only by
coupling the signal generator and capacitor are standardized for the RF input port and LO input port. For actual use,
however, the external circuits connected to the input pins differ according to the application and required
characteristics.
4.1 Input Pin Connections with Front Stage
(1) Internal circuitry of input pins
In each product, each input pin is a base input of an NPN transistor, with high impedance in relation to 50
for
frequencies up to 1.9 GHz. Figure 4-1 shows Smith charts for the RF port and LO port in each product.
Figure 4-1. Smith Charts of RF Port and LO Port (Input Ports)
S Parameter
μ
PC2757T
5
4
2
1
3
5
4
2
1
3
5
4
2
1
3
5
4
2
1
3
START
STOP
0.050000000 GHz
3.000000000 GHz
START
STOP
0.050000000 GHz
3.000000000 GHz
64.273
–j250.85
40.93
–j141.55
31.09
–j82.902
27.545
–j62.115
26.459
–j41.922
RF port
V
CC
= V
PS
= 3.0 V
1: 500 MHz
2: 900 MHz
3: 1500 MHz
4: 1900 MHz
5: 2500 MHz
109.98
–j363.47
79.687
–j214.84
60.195
–j141.38
50.621
–j114.52
42.488
–j87.531
RF port
V
CC
= 3.0 V V
PS
= GND
1: 500 MHz
2: 900 MHz
3: 1500 MHz
4: 1900 MHz
5: 2500 MHz
START
STOP
0.050000000 GHz
3.000000000 GHz
START
STOP
0.050000000 GHz
3.000000000 GHz
99.852
–j220.24
73.133
–j139.53
52.672
–j91.57
48.867
–j74.281
40.842
–j55.199
LO port
V
CC
= V
PS
= 3.0 V
1: 500 MHz
2: 900 MHz
3: 1500 MHz
4: 1900 MHz
5: 2500 MHz
128.02
–j354.03
88.133
–j222.33
62.516
–j140.97
58.312
–j117.96
45.59
–j93.238
LO port
V
CC
= 3.0 V V
PS
= GND
1: 500 MHz
2: 900 MHz
3: 1500 MHz
4: 1900 MHz
5: 2500 MHz
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