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參數(shù)資料
| 型號(hào)： | RF2460 |
| 廠商： | RF MICRO DEVICES INC |
| 元件分類： | 無繩電話/電話 |
| 英文描述： | PCS CDMA LOW NOISE AMPLIFIER/MIXER 1500MHZ TO 2200MHZ DOWNCONVERTER |
| 中文描述： | TELECOM, CELLULAR, RF AND BASEBAND CIRCUIT, QCC20 |
| 封裝： | 4 X 4 MM, ROHS COMPLIANT, QFN-20 |
| 文件頁數(shù)： | 4/20頁 |
| 文件大?。?/td> | 592K |
| 代理商： | RF2460 |
Preliminary
8-36
RF2460
Rev A7 010912
8
F
Pin
1
Function
ENABLE
Description
Power down pin. A logic “l(fā)ow” turns the part off. A logic “high” (>1.6V)
turns the part on.
Supply Voltage for the LNA, mixer, bias, and logic circuitry. External RF
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.
Supply Voltage for the LO buffer amplifier. External RF and IF bypass-
ing is required. The trace length between the pin and the bypass
capacitors should be minimized. The ground side of the bypass capaci-
tors should connect immediately to ground plane.
Mixer LO Input Pin.
Interface Schematic
2
VCC1
See pin 20.
3
VCC2
4
5
LO IN
NC
No connection. For isolation purposes, this pin is connected to the
ground plane.
No connection. For isolation purposes, this pin is connected to the
ground plane.
CDMA IF Output pin. This is a balanced output. The internal circuitry, in
conjunction with an external matching/bias inductor to V
CC
, sets the
operating impedance. This inductor is typically incorporated in the
matching network between the output and IF filter. The part is designed
to drive a 1k
load. Because this pin is biased to V
CC
, a DC blocking
capacitor must be used if the IF filter input has a DC path to ground.
See Application Schematic.
6
NC
7
IF+
8
NC
No connection. For isolation purposes, this pin is connected to the
ground plane.
Same as pin 7, except complementary output.
9
10
IF-
NC
See pin 6.
No connection. For isolation purposes, this pin is connected to the
ground plane.
Emitter for LNA2. Increasing the inductance on this pin will reduce the
mixer gain, increase IP3 and noise figure.
Mixer RF Input Pin. This pin is internally DC biased and should be DC
blocked if connected to a device with DC present. External matching
network sets RF and IF impedance for optimum performance.
11
LNA2 E
12
MIX IN
13
ISET2
This pin is used to set the bias current and IIP3 of the mixer amplifier
using a resistor to ground. See plots for values and current settings.
This pin is used to set the bias current and IIP3 of the LNA amplifier
using a resistor to ground. See plots for values and current settings.
LNA output pin. Open collector.
14
ISET1
15
16
LNA OUT
MIX GAIN
See pin 20.
CMOS compatible signal controlling mixer gain mode. Setting this sig-
nal high places the mixer in the high gain mode. Setting this signal low
places the mixer in low gain mode by bypassing and shutting off the
mixer buffer amplifier current.
17
LNA GAIN
CMOS compatible signal controlling LNA gain mode. Setting this signal
high places the LNA in the high gain mode. Setting this signal low
bypasses the LNA and shuts off the LNA bias current.
18
NC
No connection. For isolation purposes, this pin is connected to the
ground plane.
No connection. For isolation purposes, this pin is connected to the
ground plane.
19
NC
IF1-
IF1+
1.2 pF
1.2 pF
GND2
MIX IN
MIX GAIN
LNA GAIN
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| RF2460_06 | 制造商:RFMD 制造商全稱:RF Micro Devices 功能描述:PCS CDMA LOW NOISE AMPLIFIER/MIXER 1500MHz TO 2200MHz DOWNCONVERTER |
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