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參數(shù)資料
| 型號： | RF2608 |
| 廠商： | RF MICRO DEVICES INC |
| 元件分類： | 無繩電話/電話 |
| 英文描述： | 887368322 |
| 中文描述： | TELECOM, CELLULAR, RF AND BASEBAND CIRCUIT, PDSO8 |
| 封裝： | SOIC-8 |
| 文件頁數(shù)： | 3/4頁 |
| 文件大小： | 46K |
| 代理商： | RF2608 |
6-17
RF2608
Rev B3 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
. The IF input should be used differentially
when the part is used as a BPSK modulator.
Interface Schematic
2
3
IF-
GND
Same as pin 1, except complementary input.
See pin 1.
Ground connection. For best performance, keep traces physically short
and connect immediately to ground plane.
Bypass connection for the LO. A capacitor of 100pF to ground should
be connected to this pin
4
LO BYPASS
5
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. The balanced, as well single-ended,
input impedance is 50
.
Same as pin 3.
See pin 4.
6
7
GND
VCC
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
BIAS
IF-
IF+
BIAS
LO
BYPASS
LO
RF OUT
1
2
3
4
5
6
7
8
1 nF
IF+
1 nF
IF-
100 pF
100 pF
LO
RF OUT
100 pF
100 nF
V
CC
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