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PDF RF2861 Data sheet ( Hoja de datos )
| Número de pieza | RF2861 | |
| Descripción | CDMA LOW NOISE AMPLIFIER/MIXER 900MHz DOWNCONVERTER | |
| Fabricantes | RF Micro Devices | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de RF2861 (archivo pdf) en la parte inferior de esta página. Total 15 Páginas | ||
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RF2861CDMA
Low Noise
Ampli-
fier/Mixer
900MHz
Downcon-
verter
RF2861
CDMA LOW NOISE AMPLIFIER/MIXER
900MHz DOWNCONVERTER
Package Style: QFN, 16-pin, 3mm x 3mm
Features
3mm x 3mm LNA/Mixer
Solution
Adjustable LNA and Mixer
Current/IIP3
Meets IMD Tests with Three
Gain States/Two Logic
Control Pins
Integrated TX LO Buffer
Amplifier
Full ESD Protection on all Pins
Applications
CDMA/JCDMA Cellular
Systems
CDMA450 Handsets/Data
Cards
AMPS Cellular Systems
General Purpose LNA and
Downconverter
Commercial and Consumer
Systems
Portable Battery-Powered
Equipment
16 15 14 13
G2 1
12 LO IN
LNA IN 2
11 GND
LNA EMITTER 3
10 IF OUT-
LNA OUT 4
9 IF OUT+
5678
Functional Block Diagram
Product Description
The RF2861 is a receiver front-end for CDMA cellular applications, includ-
ing JCDMA and CDMA450. It is designed to amplify and downconvert RF
signals, using a three gain state LNA to obtain 17dB of stepped gain con-
trol. Features include digital control of LNA gain and power down mode,
along with an integrated TX LO buffer amplifier. Another feature of the chip
is adjustable IIP3 of the LNA and mixer using off-chip current setting resis-
tors to allow for minimum DC current consumption. Noise figure, IIP3, and
other specs are designed to be compatible with the TIA/EIA 98D standard
for CDMA cellular communications. The IC is manufactured on an
advanced Silicon Germanium Bi-CMOS process and is in a 3mm x 3mm,
16-pin, QFN.
Ordering Information
RF2861SQ
RF2861SR
RF2861TR7
RF2861PCK-410
Sample bag with 25 pieces
7" Reel with 100 pieces
7" Reel with 2500 pieces
460MHz to 900MHz PCBA with 5-piece sample bag
DS120220
Optimum Technology Matching® Applied
GaAs HBT
SiGe BiCMOS
GaAs pHEMT
GaN HEMT
GaAs MESFET
Si BiCMOS
Si CMOS
BiFET HBT
InGaP HBT
SiGe HBT
Si BJT
LDMOS
RF MICRO DEVICES®, RFMD®, Optimum Technology Matching®, Enabling Wireless Connectivity™, PowerStar®, POLARIS™ TOTAL RADIO™ and UltimateBlue™ are trademarks of RFMD, LLC. BLUETOOTH is a trade-
mark owned by Bluetooth SIG, Inc., U.S.A. and licensed for use by RFMD. All other trade names, trademarks and registered trademarks are the property of their respective owners. ©2006, RF Micro Devices, Inc.
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or [email protected].
1 of 15
1 page  
RF2861
Gain Control Logic Table
Gain State
ENABLE
G1
G2
High Gain
100
Mid Gain
110
Low Gain
111
Low Gain (alternate)
101
NOTE: All IDC current numbers include bias circuitry current of 1.5mA to 2.0mA (dependent on mode).
TX Buffer On: Add 2mA to total current.
Cell Band Cascaded Performance High Mixer Gain Nominal IIP3
Parameter
(Typical Values for VCC = 2.75V)
CELL CDMA
LNA (High Gain)
LNA (Mid Gain)
LNA (Low Gain)
Cascaded:
Gain (dB)
25.0
16.5
8.0
Noise Figure (dB)
2.1 6.3 12.5
Input IP3 (dBm)
-5.6
+2.0
+11.4
Total Current (mA)
25.0 21.5 18.0
NOTES:
1. Assumes 2.5dB image filter insertion loss. The TX Buffer is off.NOTE:
2. All total current numbers include bias circuitry current of 1.5 mA to 2.0 mA (dependent on mode).
Cell Band Cascaded Performance Nominal Mixer Gain High IIP3
Parameter
(Typical Values for VCC = 2.75V)
CELL CDMA
LNA (High Gain)
LNA (Mid Gain)
LNA (Low Gain)
Cascaded:
Gain (dB)
22.5
14.0
5.5
Noise Figure (dB)
2.1 6.3 12.5
Input IP3 (dBm)
-3.7
+3.5
+13.3
Total Current (mA)
25.0 21.5 18.0
NOTE: Assumes 2.5dB image filter insertion loss. The TX Buffer is off.
CDMA450 Band Cascaded Performance
Parameter
(Typical Values for VCC = 2.75V)
CDMA450
LNA (High Gain)
LNA (Mid Gain)
LNA (Low Gain)
Cascaded:
Gain (dB)
24.5 12.0
5.5
Noise Figure (dB)
2.2 8.5 14.0
Input IP3 (dBm)
-7.6
+4.5
+11.3
Total Current (mA)
29.5
25
21
NOTE: Assumes 2.5dB image filter insertion loss. The TX Buffer is off.
DS120220
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or [email protected].
5 of 15
5 Page 
RF2861
Evaluation Board Schematic
J1
CELL LNA IN
VCC
J2
CELL LNA OUT
ENABLE
C54
33 nF
TX BUFF
ENABLE
C46
33 nF
J6
LO OUT
VCC
L17
2.2 nH
P1‐1
+ C20
1 uF
C6
33 nF
C55
33 nF
16 15 14 13
C4
33 nF
L1 1
33 nH
G2 2
12
11
C25
33 nF
L24
1.2 nH
L21
10 nH
3 10
49
5678
R6
3.9 pF 9.1 k
C7
33 nF
C5
C35 R2
C3
L11
P1
1 VCC1 P2‐1
P2
1 ENABLE
2 GND P2‐2 2 TX BUF EN
3 GND
CON3
J5
LO IN
P2‐3 3 G1
P2‐4 4 G2
CON4
L6 VCC
C17
C22
J4
CDMA IF
R4
20.0 k
C2
33 nF
L3
DNI
C9
22.0 nH
G1
C1
33 nF
C8
1 pF J3
CELL MIX IN
85MHz IF (LO Freq = 965MHz)
184MHz IF (LO Freq = 1064MHz)
C3
47pF
13pF
C5
47pF
13pF
C35
DNI
DNI
R2
5.1k
2.7k
L11
150nH
82nH
L6
180nH
150nH
C22
33nF
33nF
C17
8pF
11pF
DS120220
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or [email protected].
11 of 15
11 Page | ||
| Páginas | Total 15 Páginas | |
| PDF Descargar | [ Datasheet RF2861.PDF ] | |
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