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PDF RF9906 Data sheet ( Hoja de datos )
| Número de pieza | RF9906 | |
| Descripción | CDMA / FM Low Noise Amplifier / Mixer | |
| Fabricantes | RF Micro Devices | |
| Logotipo |  |
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8
Typical Applications
• CDMA/FM Cellular Systems
• Supports Dual-Mode AMPS/CDMA
• Supports Dual-Mode TACS/CDMA
RF9906
CDMA/FM LOW NOISE AMPLIFIER/MIXER
• General Purpose Downconverter
• Commercial and Consumer Systems
• Portable Battery Powered Equipment
Product Description
The RF9906 is a receiver front-end designed for the
.157
.150
receive section of dual-mode CDMA/FM cellular applica-
tions. It is designed to amplify and down-convert RF sig-
1
nals while providing 9dB of gain control range. Noise
Figure, IP3, and other specs are designed to be compati-
ble with the IS-95 Interim Standard for CDMA cellular
.344
.337
.012
.008
.025
communications. This circuit is designed as part of the
RFMD CDMA Chip Set, consisting of this Receive LNA/
Mixer, a Receive IF AGC Amp, a Transmit IF AGC Amp,
.244
.228
and a Transmit Upconverter. The IC is manufactured on
an advanced Gallium Arsenide Heterojunction Bipolar
www.DataSheet4U.comTransistor (HBT) process, and is packaged in a standard
8°MAX
0°MIN
miniature 24-lead plastic SSOP package.
.050 .010
.016 .008
.010
.004
.069
.053
Optimum Technology Matching® Applied
Si BJT
GaAs HBT
GaAs MESFET
Si Bi-CMOS
SiGe HBT
Si CMOS
VCC1 1
GND1 2
LNA IN 3
GND2 4
IF2 5
GND3 6
IF SELECT 7
GND4 8
SELECT
LOGIC
IF1+ 9
IF1- 10
GAIN 11 IF GAIN
ADJUST
VCC2 12
24 BYPASS
23 GND6
22 LNA OUT
21 GND7
20 MIX IN -
19 GND8
18 MIN IN +
17 GND9
16 LO BUFF OUT
15 LO BUFF ENABLE
14 LO IN -
13 LO IN +
Features
• Complete Receiver Front-End
• Analog Gain Control
• Single 3.6V Power Supply
• Buffered LO Output
• Digitally Selectable IF Outputs
• 500MHz to 1500MHz Operation
Ordering Information
RF9906
CDMA/FM Low Noise Amplifier/Mixer
RF9906 PCBA Fully Assembled Evaluation Board
Functional Block Diagram
RF Micro Devices, Inc.
7625 Thorndike Road
Greensboro, NC 27409, USA
Tel (336) 664 1233
Fax (336) 664 0454
http://www.rfmd.com
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RF9906
Pin
15
16
Function
LO BUFFER
ENABLE
LO BUFFER
OUT
Description
Enable pin for the LO output buffer amplifier. This is a digitally con-
trolled input. A logic "high" turns the buffer amplifier on, and the current
consumption increases by 3mA (with -3dBm LO input). A logic "low"
turns the buffer amplifier off. The threshold voltage is approximately
1.3 V.
Optional Buffered LO Output. This pin is internally DC blocked and
matched to 50Ω. The buffer amplifier is switched on or off by the volt-
age level at pin 15.
Interface Schematic
LO
BUFFER
ENABLE
30 kΩ
BIAS
S17
GND
Same as pin 2.
N18
MIXER RF
IN+
Mixer RF Balanced Input Pin. This pin is internally DC biased and
should be DC blocked if connected to a device with DC present. For
single-ended input operation, one pin is used as an input and the other
MIXER
RF IN+
Gmixer RF input is bypassed to ground. In order to minimize the mixer’s
Inoise figure, the bypass capacitor must be a low input impedance at
the IF frequency. The single-ended input impedance is 50Ω.
S19
GND
Same as pin 2.
E20 MIXER RF Same as pin 18, except complementary input.
See pin 18.
IN-
D21
GND
Same as pin 2.
www.DataSheet4U.com22 LNA OUT LNA Output pin. This pin is internally DC blocked and matched to 50Ω See pin 3.
in order to facilitate an easy interface to a 50Ω Image Filter.
W23
GND
Same as pin 2.
24 BYPASS IF circuitry bypass pin. This pin should be well bypassed at the IF fre-
Equency in order to achieve specified FM (IF2) noise figure. The ground
side of the bypass capacitor should connect immediately to ground
Nplane. 1000pF is the suggested value. Smaller values will begin to
slightly degrade noise figure. Larger values will slow down the IF1 to
FORIF2 switching times.
NOT
LO
BUFFER
OUT
MIXER
RF IN-
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Rev C5 000822
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5 Page | ||
| Páginas | Total 8 Páginas | |
| PDF Descargar | [ Datasheet RF9906.PDF ] | |
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