RF2861
0
Typical Applications
• CDMA/JCDMA Cellular Systems
• CDMA450 Handsets/Data Cards
• AMPS Cellular Systems
Product Description
-A-
CDMA LOW NOISE AMPLIFIER/MIXER
900MHz DOWNCONVERTER
• General Purpose LNA and Downconverter
• Commercial and Consumer Systems
• Portable Battery-Powered Equipment
0.10 C A
0.05 C
3.00
2 PLCS
The RF2861 is a receiver front-end for CDMA cellular
applications, including 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 resistors
to allow for minimum DC current consumption. Noise fig-
ure, IIP3, and other specs are designed to be compatible
with the TIA/EIA 98D standard for CDMA cellular commu-
nications. The IC is manufactured on an advanced Silicon
Germanium Bi-CMOS process and is in a 3mmx3mm,
16-pin, QFN.
1.50 TYP
2 PLCS
0.90
0.85
0.70
0.65
0.10 C B
0.05
0.00
3.00
12°
MAX
2 PLCS
0.10 C B
-B-
1.37 TYP
2 PLCS
-C-
Dimensions in mm.
SEATING
PLANE
2.75 SQ
0.60
0.24
TYP
0.10 C A
0.10 M C A B
0.30
0.18
2
NOTES:
1. Shaded lead is pin 1.
2
Dimension applies to plated terminal: to be measured
between 0.20 mm and 0.25 mm from terminal end.
PIN 1 ID
R.20
1.65
SQ.
1.35
0.50
0.30
0.50
Optimum Technology Matching® Applied
Si BJT
Si Bi-CMOS
InGaP/HBT
GaAs HBT
SiGe HBT
GaN HEMT
GaAs MESFET
Si CMOS
SiGe Bi-CMOS
Package Style: QFN, 16-Pin, 3x3
Features
• 3mmx3mm LNA/Mixer Solution
• Adjustable LNA and Mixer Current/IIP3
TX BUFF
ENABLE
ENABLE
LO OUT
VCC
• Meets IMD Tests with Three Gain
States/Two Logic Control Pins
12 LO IN
11 GND
10 IF OUT-
9 IF OUT+
16
G2 1
LNA IN 2
LNA EMITTER 3
LNA OUT 4
5
ISET2
15
14
13
• Integrated TX LO Buffer Amplifier
• Full ESD Protection on all Pins
Ordering Information
RF2861
CDMA Low Noise Amplifier/Mixer 900MHz Down-
converter
RF2861 PCBA-410 Fully Assembled Evaluation Board
RF Micro Devices, Inc.
7628 Thorndike Road
Greensboro, NC 27409, USA
Tel (336) 664 1233
Fax (336) 664 0454
http://www.rfmd.com
6
ISET1
7
G1
8
MIX IN
Functional Block Diagram
Rev A2 040107
8-1
RF2861
Absolute Maximum Ratings
Parameter
Supply Voltage
Input LO and RF Levels
Operating Ambient Temperature
Storage Temperature
Rating
-0.5 to +5.0
+6
-40 to +85
-40 to +150
Unit
V
DC
dBm
°C
°C
Caution!
ESD sensitive device.
RF Micro Devices believes the furnished information is correct and accurate
at the time of this printing. However, RF Micro Devices reserves the right to
make changes to its products without notice. RF Micro Devices does not
assume responsibility for the use of the described product(s).
Parameter
Overall
RF Frequency Range
IF Frequency Range
Specification
Min.
Typ.
Max.
460 to 900
0.1
2.65
1.8
2.75
400
3.15
0.4
Unit
MHz
MHz
V
V
V
Condition
T = 25°C, V
CC
=2.75V
Power Supply
Supply Voltage
Logic High
Logic Low
Cellular CDMA Band
JCDMA Band
LNA (High Gain)
Gain
Noise Figure
Input IP3
Current
Isolation
13.0
9.0
18.5
4.0
7.0
12.5
-4.0
+25.0
1.0
9.0
+6.0
36
10.5
7.5
+8.5
12.0
8.0
-2.5
2.5
+27.0
0
-1.0
4.0
6.0
3.0
9.0
3.5
7.0
3.3
14.5
1.1
11.0
7.0
16.0
1.3
dB
dB
dBm
mA
dB
dB
dB
dBm
mA
dB
dB
dB
dBm
mA
dB
Freq=869MHz to 894MHz
Freq=832MHz to 870MHz
LNA 50Ω match
LNA (Mid Gain)
Gain
Noise Figure
Input IP3
Current
Isolation
LNA (Low Gain)
Gain
Noise Figure
Input IP3
Current
Isolation
Mixer - CDMA/JCDMA/FM
Gain
Noise Figure
Input IP3
LO to RF Isolation
dB
dB
dBm
dB
dB
dB
dBm
dB
30
mA
IF tune set for nominal mixer gain, high IIP3
184MHz IF (NF=8.3dB, 85MHz IF)
LO=1064MHz
IF tune set for high mixer gain, nominal IIP3
184MHz IF (NF=8.3dB, 85MHz IF)
LO=1064MHz
TX LO Buffer Off
Mixer - CDMA/JCDMA/FM
Gain
Noise Figure
Input IP3
LO to RF Isolation
13.0
7.5
+6.5
36
25
Cascade - High Gain
Current
8-2
Rev A2 040107
RF2861
Parameter
Cellular CDMA Band
JCDMA Band, cont’d
Other
LO-IF Isolation
RF-IF Isolation
LNA Out to Mixer In Isolation
LO-LNA In Isolation, Any State
30
45
45
40
1
dB
dB
dB
dB
pF
LO=1064MHz
Specification
Min.
Typ.
Max.
Unit
Condition
LO=1064MHz
G1, G2, ENABLE, TX BUFF ENABLE
Control Lines
Input Capacitance
Local Oscillator Input
Cellular - CDMA or FM
Input Power
Input Frequency
-10
685
1053
784
954
-10
722
942
-10
505
-4
0
710
1078
809
979
0
760
980
0
575
dBm
MHz
MHz
MHz
MHz
dBm
MHz
MHz
dBm
MHz
IF=184MHz
IF=184MHz
IF=85MHz
IF=85MHz
Cellular - JCDMA
Input Power
Input Frequency
CDMA450
Input Power
Input Frequency
-4
IF=110MHz
IF=110MHz
-4
CDMA450 Band
LNA (High Gain)
Gain
Noise Figure
Input IP3
Current
Isolation
15.0
1.4
+8.0
8.7
18.5
+2.5
2.9
+14.0
4.7
12.5
-4.0
4.0
+25.0
0
1.0
12.0
7.5
5.0
36
25
40
40
30
dB
dB
dBm
mA
dB
dB
dB
dBm
mA
dB
dB
dB
dBm
mA
dB
IF=85MHz
Freq=463MHz to 467MHz
LNA 50Ω match
LNA (Mid Gain)
Gain
Noise Figure
Input IP3
Current
Isolation
LNA (Low Gain)
Gain
Noise Figure
Input IP3
Current
Isolation
Mixer
Gain
Noise Figure
Input IP3
LO to RF Isolation
dB
dB
dBm
dB
dB
dB
dB
dB
IF tune set for high mixer gain, nominal IIP3
LO=549MHz
LO=549MHz
CDMA450 Isolation
LO-IF Isolation
RF-IF Isolation
LNA Out to Mixer In Isolation
LO-LNA In Isolation, Any State
LO=549MHz
Rev A2 040107
8-3
RF2861
Parameter
TX (Local Oscillator)
Buffer Output
Cellular - CDMA or FM
Output Power
Output Frequency
-7
685
1053
784
954
-5
-3
710
1078
809
979
dBm
MHz
MHz
MHz
MHz
mA
dBm
MHz
MHz
mA
dBm
MHz
mA
Single-ended 50Ω load
IF=184MHz
IF=184MHz
IF=85MHz
IF=85MHz
Specification
Min.
Typ.
Max.
Unit
Condition
Current Consumption
Cellular - JCDMA
Output Power
Output Frequency
Current Consumption
CDMA450
Output Power
Output Frequency
Current Consumption
2
-7
722
942
-5
-3
760
980
Single-ended 50Ω load
IF=110MHz
IF=110MHz
2
-7
505
-5
2
-3
575
Single-ended 50Ω load
IF=85MHz
8-4
Rev A2 040107
RF2861
Gain Control Logic Table
ENABLE
G1
G2
High Gain
1
0
0
Mid Gain
1
1
0
Low Gain
1
1
1
Low Gain (alternate)
1
0
1
NOTES: 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.
Gain State
Cell Band Cascaded Performance High Mixer Gain Nominal IIP3 (Typical Values for V
CC
=2.75V)
NOTE:
All total current numbers include bias circuitry current of 1.5mA to 2.0mA (dependent on mode).
Parameter
LNA (High Gain)
Cascaded:
Gain (dB)
25.0
Noise Figure (dB)
2.1
Input IP3 (dBm)
-5.6
Total Current (mA)
25.0
NOTE: Assumes 2.5dB image filter insertion loss. The TX Buffer is off.
CELL CDMA
LNA (Mid Gain)
16.5
6.3
+2.0
21.5
LNA (Low Gain)
8.0
12.5
+11.4
18.0
Cell Band Cascaded Performance Nominal Mixer Gain High IIP3 (Typical Values for V
CC
=2.75V)
Parameter
LNA (High Gain)
CELL CDMA
LNA (Mid Gain)
14.0
6.3
+3.5
21.5
LNA (Low Gain)
5.5
12.5
+13.3
18.0
Cascaded:
Gain (dB)
22.5
Noise Figure (dB)
2.1
Input IP3 (dBm)
-3.7
Total Current (mA)
25.0
NOTE: Assumes 2.5dB image filter insertion loss. The TX Buffer is off.
CDMA450 Band Cascaded Performance (Typical Values for V
CC
=2.75V)
Parameter
LNA (High Gain)
Cascaded:
Gain (dB)
24.5
Noise Figure (dB)
2.2
Input IP3 (dBm)
-7.6
Total Current (mA)
29.5
NOTE: Assumes 2.5dB image filter insertion loss. The TX Buffer is off.
CDMA450
LNA (Mid Gain)
12.0
8.5
+4.5
25
LNA (Low Gain)
5.5
14.0
+11.3
21
Rev A2 040107
8-5
