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參數(shù)資料
| 型號： | RF9938PCBA |
| 廠商： | RF Micro Devices, Inc. |
| 英文描述： | PCS UPCONVERTER/BPSK MODULATOR |
| 中文描述： | 個人通訊變頻/的BPSK調(diào)制器 |
| 文件頁數(shù)： | 3/4頁 |
| 文件大?。?/td> | 46K |
| 代理商： | RF9938PCBA |
6-63
RF9938
Rev A3 010720
6
M
Applic ation S chematic
Pin
1
Function
IF+
Description
Balanced IF Input Pin. This pin is internally DC biased and should be
DC blocked if connected to a device with a DC level present. For single-
ended input operation, one pin is used as an input and the other IF
input is AC coupled to ground. The balanced, as well as single-ended,
input impedance is 265
.
Same as pin 1, except complementary input.
Interface Schematic
2
3
IF-
GND
Ground connection. Keep traces physically short and connect immedi-
ately to ground plane for best performance.
Balanced LO Input Pin. This pin is internally DC biased and should be
DC blocked if connected to a device with a DC level present. For single-
ended input operation, one pin is used as an input and the other LO
input is AC coupled to ground. The balanced, as well as single-ended,
input impedance is 50
.
Same as pin 4, except complementary input.
4
LO+
5
6
7
LO-
GND
VCC
Same as pin 3.
Supply Voltage pin. External bypassing is required. External RF, LO,
and IF bypassing is required. The trace length between the pin and the
bypass capacitors should be minimized. The ground side of the bypass
capacitors should connect immediately to ground plane.
RF Output Pin. This pin is internally DC blocked. The output impedance
is 50
.
8
RF OUT
1
2
3
4
8
7
6
5
RF OUT
1 nF
IF+
1 nF
IF-
33 pF
LO IN
47 pF
100 nF
V
CC
10 pF
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