www.DataSheet4U.com
RF2860
0
Typical Applications • CDMA Korean PCS Systems • CDMA US PCS Systems • IMT-2000 and 2.4GHz Band Applications Product Description
-A-
RoHS Compliant & Pb-Free Product
PCS CDMA LOW NOISE AMPLIFIER/MIXER BROADBAND DOWNCONVERTER
• GPS Applications • General Purpose Downconverter • Commercial and Consumer Systems
0.10 C A
0.05 C
3.00
2 PLCS
The RF2860 is a broadband receiver front-end designed for CDMA PCS applications. The broadband design makes it a great solution as well for GPS, IMT-2000 and 2.4GHz applications. It is designed to amplify and downconvert RF signals, while providing 21.5dB of stepped gain control range. Features include digital control of LNA gain, TX buffer/enable, and power down mode. Another feature of the chip is the ability to set the bias point and RF performance of the LNA and mixer through the ISET1 and ISET2 resistors respectively. Noise figure, IIP3, and gain are designed to exceed the IS-98 interim standard requirement for CDMA PCS communications. The IC is manufactured on an advanced Silicon Germanium Bi-CMOS process and is in a 3mmx3mm, 16-pin, leadless chip carrier. Optimum Technology Matching® Applied
Si BJT Si Bi-CMOS InGaP/HBT GaAs HBT SiGe HBT GaN HEMT GaAs MESFET Si CMOS SiGe Bi-CMOS
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
-CDimensions 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
Package Style: QFN, 16-Pin, 3x3
Features • LNA Noise Figure=1.3dB (KPCS) • Stepped LNA Gain Control
TX BUFF ENAB
ENABLE
LO OUT
VCC
• Integrated TX LO Buffer Amplifier • Adjustable IIP3 versus Current for both
12 LO IN 11 GND 10 IF OUT9 IF OUT+
16 LNA GAIN 1 LNA IN 2 GND 3 LNA OUT 4 5 ISET2
15
14
13
LNA and Mixer Blocks • All Pins ESD Protected
Ordering Information
RF2860 PCS CDMA Low Noise Amplifier/Mixer Broadband Downconverter RF2860PCBA-41XFully 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 MIX IN
8 RF VCC
Functional Block Diagram
Rev A9 050902
8-383
RF2860
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
VDC dBm °C °C
Caution! ESD sensitive device.
RF Micro Devices believes the furnished information is correct and accurate at the time of this printing. RoHS marking based on EUDirective2002/95/EC (at 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
Min.
Specification Typ. Max.
1575 to 2170
Unit
MHz MHz V V V μA
Condition
T = 25°C, VCC =2.75V
0.1 2.65 1.8 2.75
400 3.15 0.4 10
Power Supply
Supply Voltage Logic High Logic Low Power Down Current
US PCS Band Korean PCS Band GPS Band IMT-2000 Band LNA (On) - KPCS
Gain Noise Figure Input IP3 Current Isolation 14.0 +6.0 16.5 1.3 +8.0 6.5 20 16.0 1.4 +8.0 6.5 30 17.25 1.2 +5.0 6.0 20 14.5 1.4 +8.0 6.0 20 17.5 1.5 dB dB dBm mA dB
ENABLE=0 Freq=1930MHz to 1990MHz Freq=1840MHz to 1870MHz Freq=1575.42MHz Freq=2110MHz to 2170MHz LNA 50Ω match
LNA (On) - US PCS
Gain Noise Figure Input IP3 Current Isolation 13.5 +6.0 17.0 1.6 dB dB dBm mA dB
LNA 50Ω match
LNA (On) - GPS Band
Gain Noise Figure Input IP3 Current Isolation 14.75 18.25 dB dB dBm mA dB
LNA 50Ω match
LNA (On) - IMT-2000 Band
Gain Noise Figure Input IP3 Current Isolation 12.0 15.5 dB dB dBm mA dB
LNA 50Ω match
LNA (Off) - US PCS, KPCS, GPS, IMT-2000
Gain Noise Figure Input IP3 Current Isolation -6.5 +20.0 -5.0 5.0 +25.0 0 4 -3.5 6.0 dB dB dBm mA dB
8-384
Rev A9 050902
RF2860
Parameter
US PCS Band, Korean PCS Band, GPS Band, IMT-2000 Band, cont’d Mixer - KPCS/US PCS
Gain Noise Figure Input IP3 Current LO to RF Isolation 12.0 +1.0 36 16.5 18.5 7.5 -2.0 16.0 20.0 14.0 7.0 +3.0 17.5 15.5 8.0 dB dB dBm mA dB dB dB dBm mA dB dB dB dBm mA dB dB dB dB dB 1 pF LNA GAIN, ENABLE, TX BUFF ENAB
Min.
Specification Typ. Max.
Unit
Condition
See note.
Mixer - GPS
Gain Noise Figure Input IP3 Current LO to RF Isolation
36 11.5 13.5 8.5 0.0 16.0 15.0
Mixer - IMT-2000
Gain Noise Figure Input IP3 Current LO to RF Isolation
36 36 40 30 35
Other
LO-IF Isolation RF-IF Isolation LNA Out to Mixer In Isolation LO-LNA In Isolation, Any State
40
Control Lines
Input Capacitance
Local Oscillator Input
KPCS, US PCS, GPS, IMT-2000 Input Power Input Frequency -10 1391 -4 0 2360 dBm MHz
IF=183.6MHz/210.38MHz/220.38MHz
TX (Local Oscillator) Buffer
PCS Output Power -11 -7 Output Frequency 1600 2300 Current Consumption 2 NOTE: Mixer performance can be changed with external IF load/tuning. dBm MHz mA Single-ended 50Ω load
Rev A9 050902
8-385
RF2860
LNA Performance versus Current (As a function of ISET1 Resistance)
Gain (dB) 15.6 15.7 15.9 16.1 16.2 16.4 16.4 Gain (dB) 14.2 14.2 14.1 14.0 13.8 13.8 13.5 IIP3 (dBm) 7.3 9.7 16.8 12.3 10.6 9.6 9.4 IIP3 (dBm) 4.0 3.7 3.5 2.9 2.6 2.4 1.8 Noise Figure (dB) 1.4 1.4 1.4 1.4 1.4 1.4 1.4 Noise Figure (dB) 6.7 6.6 6.5 6.4 6.4 6.3 6.3 ISET1 Resistance (kΩ) 36 33 30 27 24 22 20 ISET2 Resistance (kΩ) 6.8 7.5 8.3 9.1 10.0 11.0 12.0 LNA GAIN TX BUFF ENAB IDC (mA) Current (mA) 4.6 4.9 5.4 6.1 6.7 7.3 7.9 Current (mA) 25.6 24.6 23.9 22.8 22.2 21.8 20.7
Mixer Performance versus Current (As a function of ISET2 Resistance)
Evaluation Board Current Measurement
ENABLE US PCS Band Korean PCS Band LNA On, TX Buffer Off 1 1 0 LNA Bypassed, TX Buffer Off 1 0 0 GPS Band LNA On, TX Buffer Off 1 1 0 LNA Bypassed, TX Buffer Off 1 0 0 IMT-2000 Band LNA On, TX Buffer Off 1 1 0 LNA Bypassed, TX Buffer Off 1 0 0 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.
27.5 21.0 24.5 18.5 24.5 18.5
Cascaded Performance (Typical Values for VCC =2.75V) NOTE: All total current numbers include bias circuitry current of 1.5mA to 2.0mA (dependent on mode).
Parameter Cascaded: Gain (dB) Noise Figure (dB) Input IP3 (dBm) KPCS CDMA LNA ON LNA OFF 28.0 1.8 -11.0 6.5 14.5 +10.0 PCS CDMA LNA ON LNA OFF 27.5 2.0 -11.0 6.5 14.5 +10.0 40 40 40 40 21.0 LNA ON 33.25 1.7 -17.0 40 40 40 40 24.5 GPS LNA OFF 11.0 15.0 5.3 40 40 40 40 18.5 IMT-2000 LNA ON LNA OFF 25.5 2.5 -12.0 40 40 40 40 24.5 6.0 16.0 +7.2 40 40 40 40 18.5
LO to IF Isolation (dB) 40 40 40 IF1 to RF Isolation (dB) 40 40 40 IF2 to RF Isolation (dB) 40 40 40 LO to LNA IN Isolation (dB) 40 40 40 Total Current (mA) 27.5 21.0 27.5 NOTE: Assumes 2.5dB image filter insertion loss. The TX Buffer is off.
8-386
Rev A9 050902
RF2860
Pin 1 Function LNA GAIN Type Description DI Logic input. High activates LNA. Low selects LNA bypass
mode.
Interface Schematic
LNA GAIN
2
LNA IN
AI
US PCS LNA input. KPCS LNA input. GPS LNA input. IMT-2000 LNA input.
VCC LNA OUT LNA IN
LNA EMITTER
3 4 5 6 7
GND LNA OUT ISET2 ISET1 MIX IN
P AO AI AI AI
Ground via within 0.2mm of pin required. PCS LNA output. Simple external L-C components required for matching and VCC supply. External resistor required to set the mixer operating current. External resistor required to set the LNA operating current. KPCS mixer RF single-end input. Matched to 50Ω. USPCS mixer RF single-end input. Matched to 50Ω. GPS mixer RF single-end input. Matched to 50Ω. IMT-2000 mixer RF single-end input. Matched to 50Ω. External capacitor and inductor placed close to package required. IF output. Open collector.
MIX IN
8 9
RF VCC IF OUT+
P AO
IF+
IF-
10 11 12
IF OUTGND LO IN
AO P AI
IF output. Open collector. Ground. LO single-end input. Matched to 50Ω.
See pin 9.
LO IN 70 Ω
13 14 15
VCC LO OUT TX BUFF ENAB ENABLE
P AO DI
External bypass capacitor may be required. LO output. Internal DC block. Drives 50Ω. Logic input. High enables TX LO output buffer amplifiers.
TX BUFF ENAB
16
DI
Logic input. Low level powers down the IC.
ENABLE
Pkg Base
Legend:
GND
P
Ground connection. The backside of the package should be soldered to a top side ground pad which is connected to the ground plane with multiple vias.
DI=Digital Input from Baseband Chip AI=Analog Input AO=Analog Output P=VCC or GND
Rev A9 050902
8-387
RF2860
Application Schematic Differential IF Matching
LO OUT TX BUFF ENAB ENABLE LNA GAIN VCC
2.2 nH 33 nF
16
Note 4 Note 6
15
14
13 12 VCC 11 10 9 33 nF L2 C1 L4 C2 R1 C3 L1
5 4 9 10
1 2
LO IN
Note 12
L7 LNA IN 1 pF
Note 3
33 nF DNI
Note 5 Note 7 Note 11
3 L5 4
VCC 30 Ω 33 nF
Note 8
L6
Note 9 Note 2
5
6
7
8
IF OUT C4
2 to 10 Ω
Note 14
IN
R2
5
R3
Note 1
L3 33 nF
FL2 IF Saw
Note 13
6 GND 3
GND
GND OUT GND
4 1
VCC 3.9 nH RF VCC
Note 10
FL4 RF Saw
3 pF
2
1.3 pF
Application US PCS, IF=184MHz Korean PCS, IF=220MHz GPS, IF=184MHz IMT-2000, IF=190MHz
C1 (pf) 6.2 5.1 3.9 4.7
C2 (pf) 2.5 3.0 1.5 1.0
C3 (pF) 6.2 5.1 3.9 4.7
C4 (pF) TBD TBD TBD TBD
L1 (nH) 33 33 33 33
L2 (nH) 72 50 110 50
L3 (nH) 72 50 110 50
L4 (nH) TBD TBD TBD TBD
L5 (nH) 15 15 18 10
L6 (nH) 2.7 3.3 4.7 2.7
L7 (nH) 1.2 1.5 1.5 1.5
R1 (kΩ) 9.1 7.5 DNI DNI
R2 (kΩ) 8.2 8.2 13.0 13.0
R3 (kΩ) 27.0 27.0 27.0 27.0
NOTES: 1. This resistor sets the LNA current. Increasing the resistor value lowers the current. 2. This resistor sets the mixer current. Increasing the resistor value lowers the current. 3. This capacitor is used for optimum noise figure and input matching. 4. This inductor is used for optimum input match. 5. This inductor is used for optimum input match and IP3. Low impedance path to ground for optimum IP3. 6. DC-blocking capacitor. Not requi
