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參數(shù)資料
| 型號(hào)： | RF2629 |
| 廠商： | RF MICRO DEVICES INC |
| 元件分類： | 衰減器 |
| 英文描述： | 3V CDMA/FM TRANSMIT AGC AMPLIFIER |
| 中文描述： | 12 MHz - 175 MHz RF/MICROWAVE WIDE BAND HIGH POWER AMPLIFIER |
| 封裝： | PLASTIC, MSOP-8 |
| 文件頁(yè)數(shù)： | 3/6頁(yè) |
| 文件大?。?/td> | 103K |
| 代理商： | RF2629 |
10-41
RF2629
Rev B4 010720
10
I
Pin
1
Function
IN+
Description
Balanced input pin. This pin is internally DC-biased and should be DC
blocked if connected to a device with a DC level, other than V
CC
,
present. A DC to connection to V
CC
is acceptable. For single-ended
input operation, one pin is used as an input and the other input is AC-
coupled to ground. The balanced input impedance is 1k
, while the
single-ended input impedance is 500
.
Interface Schematic
2
3
IN-
GND
Same as pin 2, except complementary input.
See pin 1 schematic.
Ground connection. For best performance, keep traces physically short
Analog gain adjustment for all amplifiers. Valid control ranges are from
0V to 3.0V. Maximum gain is selected with 3.0V. Minimum gain is
selected with 0V. These voltages are valid only for a 3.3k
DC source
impedance.
4
GC
5
OUT-
Balanced output pin. This is an open-collector output, designed to
operate into a 500
balanced load. The load sets the operating imped-
ance, but an external choke or matching inductor to V
CC
must also be
supplied in order to correctly bias this output. This bias inductor is typi-
cally incorporated in the matching network between the output and next
stage. Because this pin is biased to V
CC
, a DC-blocking capacitor must
be used if the next stage’s input has a DC path to ground.
Same as pin 5, except complementary output.
6
7
OUT+
VCC1
See pin 5 schematic.
Supply voltage pin. External 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. Pins 7 and 8 may share one bypass capacitor if trace
lengths are kept minimal.
Same as pin 7.
8
VCC2
580
V
CC
580
CDMA-
CDMA+
23.5 k
15 k
12.7 k
V
CC
OUT-
OUT+
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