Datenblatt-pdf.com


RF2492 Schematic ( PDF Datasheet ) - RF Micro Devices

Teilenummer RF2492
Beschreibung DUAL-BAND LOW NOISE AMPLIFIER/MIXER
Hersteller RF Micro Devices
Logo RF Micro Devices Logo 




Gesamt 22 Seiten
RF2492 Datasheet, Funktion
Preliminary
8
RF2492
DUAL-BAND LOW NOISE AMPLIFIER/MIXER
Typical Applications
• TDMA-GSM Cellular/PCS Handsets
• TDMA Cellular/PCS Handsets
• GAIT Handsets
• CDMA Cellular/PCS Handsets
• GSM DCS/PCS Handsets
Product Description
The RF2492 is a fully featured dual-band LNA/Mixer and
is usable in a variety of mobile handset applications. The
unique dual IF outputs provide interface to two indepen-
dent IF SAW filters supporting applications such as
TDMA-EDGE where 30kHz and 200kHz bandwidth SAW
filters are used. With independent power management
control pins for the LNAs and mixers, either IF output can
be accessed from either high- or low-band LNAs, provid-
ing maximum flexibility with minimum power usage. Multi-
ple gain control options are provided to achieve a very
large dynamic range for the receiver. A frequency doubler
is included in the LO circuit to generate both high- and
low-band LO signals with a single VCO. The RF2492 is
packaged in a 32 pin, 5mmx5mm, leadless plastic pack-
age.
Optimum Technology Matching® Applied
Si BJT
Si Bi-CMOS
GaAs HBT
üSiGe HBT
GaAs MESFET
Si CMOS
25 23
PCS LNA IN 30
LNA GAIN SEL 12
MIX GAIN SEL 14
CELL LNA IN 11
IF SEL 9
LNA IP SEL 10
LNA ISET 17
BAND SEL 31
LOGIC
CONTROL
X2 ENABLE 32
15 18
4 IF1+
5 IF1-
7 IF2-
8 IF2+
X2
1
19 PCS LO OUT+
20 PCS LO OUT -
21 CELL LO OUT+
22 CELL LO OUT-
1.00
0.85
0.80
0.65
0.60
0.24 typ
3
0.30
0.18
5.00
sq.
0.45
0.20
4 PLCS
3.25
2.95 sq.
12°
MAX
0.05
0.01
0.55
0.30
0.50
0.23
0.13
4 PLCS
NOTES:
1 Shaded Pin is Lead 1.
2 Pin 1 identifier must exist on top surface of package by identification
mark or feature on the package body. Exact shape and size is optional.
3 Dimension applies to plated terminal: to be measured between 0.02 mm
and 0.25 mm from terminal end.
4 Package Warpage: 0.05 mm max.
5 Die Thickness Allowable: 0.305 mm max.
Package Style: LCC, 32-Pin, 5x5
Features
• Complete Dual-Band Receiver Front End
• Low Noise Figure
• Stepped LNA/Mixer Gain Control
• Adjustable LNA Bias Current/IIP3
• Integrated LO Frequency Doubler
• Differential LO Buffer Outputs
Ordering Information
RF2492
Dual-Band Low Noise Amplifier/Mixer
RF2492 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
8
Rev A4 010828
8-33






RF2492 Datasheet, Funktion
RF2492
Preliminary
Pin Function Description
Interface Schematic
1
LO IN
LO input for both bands. Impedance is approximately (120-j25).
1kshunt resistor (static bleed).
AC coupled to transistor base
(internal DC block).
2
VCC2
Power supply connection for internal LO amplifiers. External low-induc-
tance bypass capacitor between 1nF and 47nF recommended.
3
GND
Ground connection.
4
IF1+
High-band IF output. Open collector. “Current combiner” IF interface to 2pF internal shunt capacitance.
1000SAW filter recommended
5
IF1-
High-band IF output. Open collector. “Current combiner” IF interface to 2pF internal shunt capacitance.
1000SAW filter recommended
6 BYPASS Pin requires external bypass capacitor between 1nF and 47nF.
7
IF2-
Low-band IF output. Open collector. “Current combiner” IF interface to 2pF internal shunt capacitance.
1000SAW filter recommended
8
IF2+
Low-band IF output. Open collector. “Current combiner” IF interface to 2pF internal shunt capacitance.
1000SAW filter recommended
9
IF SEL
Logic input. High selects IF1 mixer; low selects IF2 mixer.
Diode to VCC and Ground.
CMOS logic interface.
10 LNA IP SEL Logic input. High selects external LNA current reference (pin 17); low Diode to VCC and Ground.
selects internal LNA current reference.
CMOS logic interface.
11 CELL LNA Low-band LNA input (base). Simple external matching required for best
IN performance.
12 LNA GAIN Logic input. High selects maximum LNA gain; low selects minimum Diode to VCC and Ground.
8 SEL
LNA gain.
CMOS logic interface.
13
VCC1
Power supply for internal references, logic, and mixer preamplifiers.
Internal RF bypass capacitor. External bypass capacitor between 1nF
and 47nF required.
14 MIX GAIN Logic input. High selects maximum mixer gain (mixer RF amp on); low Diode to VCC and Ground.
SEL
selects minimum mixer gain (mixer RF amp off).
CMOS logic interface.
15 CELL LNA Low-band LNA output (collector). Simple external L-C matching
OUT
required.
16
GND
Ground connection. See evaluation board layout.
17 LNA ISET External current reference for LNA. Resistor to ground sets LNA cur-
rent when Pin 10 is high. 20kresults in approximately 10mA LNA cur-
rent. Higher resistance results in lower current.
18 CELL MIX Low band mixer RF preamplifier input (base). External L-C network
IN required for best performance.
19 PCS LO High-band buffered LO output.
OUT+
Internal DC blocking capacitor.
1kshunt resistor (static bleed).
20 PCS LO High-band buffered LO output.
OUT-
Internal DC blocking capacitor.
1kshunt resistor (static bleed).
21 CELL LO Low-band buffered LO output.
OUT+
Internal DC blocking capacitor.
1kshunt resistor (static bleed).
22 CELL LO Low-band buffered LO output.
OUT-
Internal DC blocking capacitor.
1kshunt resistor (static bleed).
23 PCS MIX IN High-band mixer RF preamplifier input (base). External L-C network
required for best performance.
24
GND
Ground connection. Keep traces physically short and connect immedi-
ately to ground plane (low-inductance ground required for best perfor-
mance).
8-38
Rev A4 010828

6 Page









RF2492 pdf, datenblatt
RF2492
Preliminary
Top
8
Typical Inner Layer
8-44
Rev A4 010828

12 Page





SeitenGesamt 22 Seiten
PDF Download[ RF2492 Schematic.PDF ]

Link teilen




Besondere Datenblatt

TeilenummerBeschreibungHersteller
RF2492DUAL-BAND LOW NOISE AMPLIFIER/MIXERRF Micro Devices
RF Micro Devices
RF2494HIGH FREQUENCY LNA/MIXERRF Micro Devices
RF Micro Devices
RF2495LOW CURRENT LNA/MIXERRF Micro Devices
RF Micro Devices
RF2498TRI-BAND/QUAD-MODE CDMA/GPS LOW NOISE AMPLIFIER/MIXERRF Micro Devices
RF Micro Devices

TeilenummerBeschreibungHersteller
CD40175BC

Hex D-Type Flip-Flop / Quad D-Type Flip-Flop.

Fairchild Semiconductor
Fairchild Semiconductor
KTD1146

EPITAXIAL PLANAR NPN TRANSISTOR.

KEC
KEC


www.Datenblatt-PDF.com       |      2020       |      Kontakt     |      Suche