Document
Preliminary
RF2488
MULTI-MODE DUAL-BAND LNA MIXER
8
Typical Applications
• TDMA/EDGE Handsets • TDMA IS-136 Handsets • GAIT Handsets
• TDMA/GSM Dual-Band Handsets • GSM/DCS/EDGE Handsets
Product Description
The RF2488 is a dual-band LNA/Mixer designed to support dual-band, multi-mode handset applications. The unique dual IF outputs provide interface to two independent IF SAW filters supporting applications that combine IS136 with GSM, DCS or EDGE air interfaces. The device includes four mixers, providing the ability to use two independent IF bandwidths accessible from either the low or high band LNAs. Each LNA has a gain bypass mode controlled by the GAIN SEL pin. An image reject filter is required between each LNA and its mixer. Power management is implemented based on a three-pin logic level interface. Power consumption is minimized by shutting down all but the active sections of the device.
.80 .65
1.00 0.85
4.00 sq.
.60 typ .24
.45 .20
4 PLCS
2.25 sq. 1.95
12° max .05 .01
.55 .30 2 .40 .28 .50
.23 .13
4 PLCS
Optimum Technology Matching® Applied
Si BJT Si Bi-CMOS
Package Style: LCC, 24-Pin, 4x4
üSiGe HBT
VCC BIAS Low LNA OUT Low LNA VCC 24 23 22
GaAs HBT
GaAs MESFET Si CMOS
Features
• Complete Dual-Band Front-End • Switchable LNA Gain • Low Noise and High Intercept Point • Low Current Consumption • Single 2.7V to 3.3V Power Supply • Supports Dual IF Bandwidths
Low MIX IN
TX/RX
21
20
Low LNA GND GAIN SEL Low LNA IN High LNA IN High LNA GND High LNA VCC
1 2 3 4 5 6 7 High LNA OUT 8 GND 9 IF OUT SEL 10 High MIX IN 11 NC 12
Low LO IN
19 18 BAND SEL
17 IF1+ 16 IF115 MXR VCC 14 IF2+ 13 IF2-
Ordering Information
RF2488 RF2488 PCBA Multi-Mode Dual-Band LNA Mixer Fully Assembled Evaluation Board
Functional Block Diagram
High LO IN
RF Micro Devices, Inc. 7625 Thorndike Road Greensboro, NC 27409, USA
Tel (336) 664 1233 Fax (336) 664 0454 http://www.rfmd.com
Rev A0 010905
8-123
FRONT-ENDS
NOTES: 1 Shaded Pin is Lead 1. 2 Dimension applies to plated terminal: to be measured between 0.02 mm and 0.25 mm from terminal end. 3 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. 4 Package Warpage: 0.05 mm max. 5 Die Thickness Allowable: 0.305 mm max.
8
RF2488
Absolute Maximum Ratings Parameter
Supply Voltage Input LO and RF Levels Operating Ambient Temperature Storage Temperature
Preliminary
Rating
-0.5 to +3.6 10 -40 to +85 -40 to +125
Unit
V 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
Operating Range
Supply Voltage Supply Current RF Frequency Range LO Frequency Range IF Frequency Range Temperature Range
Specification Min. Typ. Max.
2.7 800 1800 885 1885 85 -40 3 22 3.3 24 1000 2000 1400 2400 400 +85
Unit
V mA MHz MHz MHz MHz MHz °C
Condition
@ 3V in any mode. T=25°C Low Band High Band Low Band High Band
Low Noise Amplifier Low Band
Gain
TAMB =25°C, VCC =3V Frequency=869MHz to 894MHz 17 -11 18 -9 19 -8 ±0.75 1.35 12 dB dB dB dB dB dBm dBm dB dB dB dB 4 0.3 5 0.5 mA mA High Gain, GAIN SEL=High Low Gain, GAIN SEL=Low -40°C to +85°C High Gain, GAIN SEL=High Low Gain, GAIN SEL=Low High Gain, GAIN SEL=High Low Gain, GAIN SEL=Low LNA Input-External Match, GAIN SEL=High LNA Input-External Match, GAIN SEL=Low LNA Output-External Match, GAIN SEL=High LNA Output-External Match, GAIN SEL=Low High Gain, GAIN SEL=High Low Gain, GAIN SEL=Low TAMB =25°C, VCC =3V, IF=135MHz; Mixer RF Input Frequency=869MHz to 894MHz; LO Input Frequency=1004MHz to 1029MHz
8
FRONT-ENDS
Gain Variations versus Temperature Noise Figure Input 3rd Order Intercept Return Loss 0 22 10 10 10 10 Supply Current
1.25 10 3 25
Mixer Low Band
Conversion Gain LO Input Level Noise Figure (SSB) Input 3rd Order Intercept Return Loss Terminating Impedance, IF Output Mixer Supply Current 9 -9 6 10 10 10 -6 10 7 11 0 12 dB dBm dB dBm dB dB Ω mA
500 12 13
Mixer RF Input LO Input Mixer “ON”
8-124
Rev A0 010905
Preliminary
Parameter
Low Band Cascaded Electrical Specification
Gain Gain Variations versus Temperature Noise Figure Input 3rd Order Intercept Return Loss -10 16 10 10 10 10 50 35 40 24 -4 26 -2 28 0 +1.0 2.5 24 dB dB dB dB dB dBm dBm dB dB dB dB dB dB dB dB dB Ω mA mA
RF2488
Specification Min. Typ. Max. Unit Condition
TAMB =25°C, VCC =3V, IF=135MHz. Assumes 3dB loss for image filter. High Gain, GAIN SEL=High Low Gain, GAIN SEL=Low
2.1 22 -8 18
Isolation
IF Output Impedance Supply Current
45 >50 >40 500 16 13
18 15
Low Noise Amplifier High Band
Gain Gain Variations versus Temperature Noise Figure Input 3rd Order Intercept Return Loss 0 16 10 10 10 10 Supply Current 6 0.3 7 0.5 16 -8 17 -6 18 -4 +1.0 1.7 11 dB dB dB dB dB dBm dBm .