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參數(shù)資料
| 型號： | RF2638 |
| 廠商： | RF MICRO DEVICES INC |
| 元件分類： | 無繩電話/電話 |
| 英文描述： | W-CDMA AND CDMA UPCONVERTER/ BPSK MODULATOR |
| 中文描述： | TELECOM, CELLULAR, RF AND BASEBAND CIRCUIT, PDSO8 |
| 封裝： | ROHS COMPLIANT, MSOP-8 |
| 文件頁數(shù)： | 3/10頁 |
| 文件大?。?/td> | 152K |
| 代理商： | RF2638 |
6-27
RF2638
Rev B13 010731
6
M
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, input impedance is
260
.
Interface Schematic
2
3
IF+
BYP
Same as pin 1, except complementary input.
See pin 1.
Bypass pin for internal bias circuitry. Bypass with a 1nF capacitor.
4
LO-
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.
5
6
LO+
GND
Same as pin 4, except complementary input.
See pin 4.
Ground connection. For best performance, keep traces physically short
and connect immediately to ground plane.
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.
7
VCC
8
RF OUT
IF+
IF-
130
130
BIAS
BYP
LO+
LO-
BIAS
300
RF OUT
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