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參數(shù)資料
| 型號： | RF2475 |
| 廠商： | RF MICRO DEVICES INC |
| 元件分類： | 無繩電話/電話 |
| 英文描述： | DUAL-BAND LOW NOISE AMPLIFIER/MIXER WITH FREQUENCY DOUBLER |
| 中文描述： | TELECOM, CELLULAR, RF AND BASEBAND CIRCUIT, QCC28 |
| 封裝： | 5 X 5 MM, LCC-28 |
| 文件頁數(shù)： | 7/20頁 |
| 文件大?。?/td> | 547K |
| 代理商： | RF2475 |
Preliminary
8-95
RF2475
Rev A2 010918
8
F
Truth Table of Pin-by-Pin Biasing
Pin #
1
Pin
Name
VCC19
Biased
by VCC
Supply
Mode
RX-800
L
RX-1900
H
TX-800
L
TX-1900
L
Power Control Modes
Mode
Pin Name
RX19
LNA VCC19
MXR VCC19
NOTES:
There are separate RX/TX LO doublers with a common output.
The DC return path for both the TX and RX doublers is via the PLL VCC which is on in all TX and RX modes.
This allows sharing of the LC load at the doubler output, which saves a significant amount of die area.
28
LNA
OUT19
RX19
VCC
8
9
12
14
TX
LO19
TX19
VCC
15
VCC
TX19
TX19
VCC
16
18
IF B
19
IF A
22
VCC
TX8
TX8
VCC
23
TX
LO8
TX8
VCC
25
LNA
LNA
VCC8
RX8
VCC
LNA
OUT8
RX8
VCC
MXR
VCC19
RX19
VCC
DOUBLER
VCC
PLL
VCC
MXR
VCC8
RX8
VCC
RX19
VCC
IF
VCC
IF
VCC
L
H
L
L
H
L
L
L
H
L
L
L
L
H
L
L
L
L
L
H
L
L
L
H
H
H
H
H
H
H
L
L
H
H
L
L
L
L
H
L
L
L
H
L
H
L
L
L
L =
H =
Supply Off
Supply On
Pin #
Controls the Following Circuit Functions
1900MHz LNA Bias
Mixer RF Amplifier
Mixer LO Driver
RX LO Doubler
DC Return for the LO Doubler
DC Return for Mixer
DC Return for Mixer
800MHz LNA Bias
Mixer RF Amplifier
Mixer LO Driver
DC Return for Mixer
DC Return for Mixer
800MHz TX LO Buffer
1900MHz TX LO Buffer
TX LO Doubler
DC Return for the LO Doubler
1
12
Doubler VCC
IF B
IF A
LNA VCC8
MXR VCC8
16
18
19
8
25
RX8
IF B
IF A
18
19
22
15
TX8
TX19
VCC TX8
VCC TX19
Doubler VCC
16
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