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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(R) Applied
Si BJT Si Bi-CMOS
Package Style: LCC, 24-Pin, 4x4
uSiGe 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=25C Low Band High Band Low Band High Band
Low Noise Amplifier Low Band
Gain
TAMB =25C, 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 -40C to +85C 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 =25C, 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 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 mA mA
RF2488
Specification Min. Typ. Max. Unit Condition
TAMB =25C, 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 dB dB dB dB mA mA
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 Mixer RF Input Mixer LO Input LO IN to LNA IN, GAIN SEL=High LO IN to LNA IN, GAIN SEL=Low LNA Out to Mixer RF In LO In to IF Out Mixer RF In to IF Out Mixer "ON" High Gain, GAIN SEL=High Low Gain, GAIN SEL=Low TAMB =25C, VCC =3V Frequency=1930MHz to 1990MHz High Gain, GAIN SEL=High Low Gain, GAIN SEL=Low -40C to 85C 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 =25C, VCC =3V, IF=135MHz; Mixer RF Input Frequency =1930MHz to 1990MHz; LO Output Frequency=2065MHz to 2125MHz
8
FRONT-ENDS
1.6 8 2 18
Mixer High Band
Conversion Gain LO Input Level Noise Figure (SSB) Input 3rd Order Intercept Return Loss, Mixer RF Input LO Input Terminating Impedance IF Output Mixer Supply Current 10 -9 5 10 10 11 -6 10 7 12 0 12 dB dBm dB dBm dB dB mA
500 16 17
Mixer "ON"
Rev A0 010905
8-125
RF2488
Parameter
High Band Cascaded Electrical Specification
Gain Gain Variations versus Temperature Noise Figure Input 3rd Order Intercept Return Loss -10 16 10 10 10 10 50 50 40 22 -2 24 0 26 2 +1.5 3.0 25 dB dB dB dB dB dBm dBm dB dB dB dB dB dB dB dB dB dBc mA mA V V A k
Preliminary
Specification Min. Typ. Max. Unit Condition
TAMB =25C, VCC =3V, IF=135MHz. Assumes 3dB loss for image filter. High Gain, GAIN SEL=High Low Gain, GAIN SEL=Low
2.6 20 -8 18
Isolation
Half IF Spur IF Output Impedance Supply Current
8
FRONT-ENDS
45 >50 >60 -68 500 22 18
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 Mixer RF Input Mixer LO Input LO IN to LNA IN, GAIN SEL=High LO IN to LNA IN, GAIN SEL=Low LNA Out to Mixer RF In LO In to IF Out Mixer RF In to IF Out Mixer "ON" High Gain, GAIN SEL=High Low Gain, GAIN SEL=Low VCC =2.7V to 2.9V VCC =2.7V to 2.9V
-60 24 22 0.5
Logic Levels
Input Low Input High Input Current Input Impedance 2.0 2 10 20 100
8-126
Rev A0 010905
Preliminary
Pin 1 2 3 Function Low LNA GND GAIN SEL Low LNA IN Description
Low band LNA ground connection. As an option, an external inductor to ground may be used to reduce LNA gain. CMOS compatible signal controlling both the low band and high band LNA gain. Logic (0)=Low Gain, Logic (1)=High Gain. Low band LNA input. The maximum VSWR is 2:1 (Cell/GSM RX band) for both the gain and bypass mode. This pin is internally DC-biased and should be DC blocked with a capacitor suitable for the frequency of operation.
RF2488
Interface Schematic
See pin 3.
Low LNA OUT
Low LNA IN
Low LNA GND
4
High LNA IN
High band LNA input. The maximum VSWR is 2:1 (DCS/PCS RX band) for both the gain and bypass mode. This pin is internally DC-biased and should be DC blocked with a capacitor suitable for the frequency of operation.
High LNA OUT
High LNA IN
High LNA GND
5 6 7 8 9 10
High MIX IN
IF output select state control pin. This CMOS compatible signal controls the selection of the IF mixer output path (see the State Control Truth Table). Local bypass capacitor required. High band RF mixer input. Although the base of the mixer input transistor is AC coupled, this pin serves a dual purpose of providing a DC-bias path via external inductor to GND. The typical input impedance is 8 real and requires external matching to 50.
High MIX IN
11 12 13
NC High LO IN IF2-
High band local oscillator input. This pin is internally AC-coupled and matched to 50. IF output. Open collector output, requires external matching components and DC connection to VCC.
See pin 19.
IF2+ 1 pF 1 pF
IF2-
1 pF
14 15
IF2+ MXR VCC
IF output. Open collector output, requires external matching components and DC connection to VCC. Mixer supply voltage. Local bypass capacitor required.
See pin 13.
Rev A0 010905
8-127
FRONT-ENDS
High LNA GND High LNA VCC High LNA OUT GND IF OUT SEL
High band LNA ground connection. Immediate grounding required adjacent to pin. High band LNA supply voltage. Local bypass capacitor required. High band LNA Output. Bias for the LNA is provided through this pin, hence it should be connected to VCC through an inductor. Direct connection to ground.
See pin 4.
See pin 4.
8
RF2488
Pin 16 Function IF1Description
IF output. Open collector output, requires external matching components and DC connection to VCC.
Preliminary
Interface Schematic
IF1+ 1 pF 1 pF 1 pF IF1-
17 18 19
IF1+ BAND SEL Low LO IN
IF output. Open collector output, requires external matching components and DC connection to VCC. This CMOS compatible pin controls the selection of the low or high band signal path (See the State Control Truth Table). Local bypass capacitor required. LO band local oscillator input. This pin is AC-coupled and matched to 50.
See pin 16.
LO IN 500
8
FRONT-ENDS
20 21
TX/RX Low MIX IN
This CMOS compatible TX/RX mode select Power Control Pin. CMOS compatible signal controlling the functional state of the device (See the State Control Truth Table). Local bypass capacitor required. Low band RF mixer input. Although the base of the mixer input transistor is AC coupled, this pin serves a dual purpose of providing a DC bias path via external inductor to GND. The typical input impedance is 8 real and requires external matching to 50. Bias supply voltage. Local bypass capacitor required. Low band LNA output. Bias for the LNA is provided through this pin, hence it should be connected to VCC through and inductor. Low band LNA RF supply voltage. Local bypass capacitor required.
Low MIX IN
22 23 24
VCC BIAS Low LNA OUT Low LNA VCC
See pin 3.
RF2488 State Control Truth Table
State
0 1 2 3 4 5 6 7
TX/RX
0 0 0 0 1 1 1 1
Band Sel
0 0 1 1 0 0 1 1
IF Out Sel
0 1 0 1 0 1 0 1
Active Circuits
Low Band LNA, IF1 Mixer Low Band LNA, IF2 Mixer High Band LNA, IF1 Mixer High Band LNA, IF2 Mixer All Off All Off All Off All Off
8-128
Rev A0 010905
Preliminary
Detailed Description
RF2488
The RF2488 is fabricated on a high performance Silicon Germanium process that allows optimization of key RF parameters (including noise figure, gain and linearity) for very low current consumption. The RF2488 is packaged in a small 24pin, 4mmx4mm, leadless chip carrier. It can be operated on a single supply voltage from 2.7V to 3.3V. To reduce power consumption the RF2488 has a standby mode that draws less than 10uA. The RF2488 has two frequency bands of operation. Each is comprised of an LNA and two downconverting mixers with combined RF inputs, and two separate intermediate frequency outputs. The LNA outputs and mixer RF inputs are typically connected through an image reject SAW filter, which provides image rejection and out-of-band blocking with low inband insertion loss. Either of the two IF outputs can be selected whether operating in low band or high band mode. This feature allows different IF frequencies and SAW filters to be used for different air interfaces in multi-mode phones. The modes are selected using the external BAND SEL and IF SEL pins; these can be switched using standard CMOS logic levels. LNA There are two LNA circuits: one for high band and one for low band. They have two gain conditions: high gain and low gain. The gain state is selected using the external GAIN SEL pin that can be switched with standard CMOS logic levels. The LNAs require a DC-blocking capacitor at the input and an inductor to ground; the inductor is used to provide additional input linearity and can be removed if the linearity is not required. The LNA output requires an output match, which is determined by the input impedance of the IR SAW filter (typically 50). The match must include an inductor to supply to provide the LNA with a DC path to VCC. In high gain mode, the low band LNA exhibits 18dB of gain combined with a noise figure of <1.4dB and a input IP3 (IIP3) of 3dB. In low gain mode, the device switches to a highly linear state, with IIP3 in excess of 20dBm and a gain of -9dB with a current drain of less than 500uA. In high gain mode, the high band LNA exhibits 17dB of gain combined with a noise figure of <1.7dB and a IIP3 of 2dB. In low gain mode, the device switches to a highly linear state, with IIP3 in excess of 15dBm and a gain of -6dB with a current drain of less than 500uA. Mixers The mixers are all single-balanced mixers, with low noise figure, high linearity and high gain. The RF input match can be tuned for a wide range of RF input frequencies. In low band mode, the match consists of an inductive choke to ground and a 7 to 50 step up input match. In high band mode, the match consists of a resonant circuit that provides a DC choke to ground and a 7 to 50 step up input match. The LO input port is internally matched to 50 and is internally DC-blocked for easy interface across a wide bandwidth. The LO input can be driven with signals as low as -9dBm with no performance degradation. The matching of the IF outputs is discussed in the applications section.
8
FRONT-ENDS
Rev A0 010905
8-129
RF2488
Application Schematic
Saw Filters
GND I/O GND GND I/O GND
Preliminary
1.2 pF
4.7 nH 15 nH LNA1 VCC 100 pF 100 pF 4.7 nH TX/RX 2.2 nH LO1 IN Band Select GAIN SEL 100 pF 56 nH LNA1 IN 33 nF 2.2 nH LNA2 IN 33 nF 4 5 6 15 14 13 7 8 9 10 11 12 C1 10 pF 10 nH 100 pF 8.2 nH IF OUT SELECT C3 2.2 nH LO2 IN 3 pF (HQ) 12 nH L1 C2 L2 R1 IF2 OUT C18 1 nF C2 1 2 3 24 23 22 21 20 19 18 IF1 OUT 17 16 C19 1 nF C3 L1 C1 L2 R1 100 pF Bias VCC 5 pF 100 pF
8
FRONT-ENDS
MX VCC
DNI
DNI
100 pF
LNA2 VCC
100 pF
GND I/O GND
Saw Filter
8-130
GND
GND I/O
Rev A0 010905
Preliminary
Application Information
Calculating the mixer output match The evaluation boards mixer output match is explained below.
VCC L2 R1
RF2488
C3 IF OUT
IF+ L1 IF-
C1
C2
The match is made up of six components, each of which is discussed below. Inductor L1 This inductor, along with capacitors C1 and C2 determine the resonant frequency of the current combining circuit, as well as the output impedance at the resonant point. The output impedance will be dependent on the parasitic resistance of the inductor RP. A high Q inductor will result in a high output impedance. Inductor L2 This inductor functions as a choke at the IF frequency, and should be made as large as possible, to not interact with the current combiner network. In addition, it provides a DC path from VCC to the mixer core transistors. Capacitors C1 and C2 These capacitors should be equal, and along with L1, define the resonant frequency. Capacitor C3 This capacitor is used to provide a DC-block. Resistor R1 This is primarily used to set the output impedance of the network. The impedance at the resonant frequency can be measured, and R1 can be placed in parallel to reduce the real impedance to the desired value. Alternatively, an approximation can be made using the following equation.
8
FRONT-ENDS
1 1 -1 R 1 = ae ------------- - ----- o e R OUT R Po
This is only an approximation, because it assumes the capacitors have infinite Q, and does not take into account PCB parasitics. The following equation can be used to approximately calculate the resonant frequency of the circuit.
1 f IF = ----------------------------------------------L1 2 ----- ( C1 + C EQ ) 2
Rev A0 010905
8-131
RF2488
Preliminary
Where CEQ is the capacitance seen looking into IF+ and IF-, this is made up of an on-chip network that is used for high frequency filtering and any on-chip and PCB stray capacitances. The internal network is shown below.
1 pF IF+ 1 pF IF1 pF Internal Circuitry
8
FRONT-ENDS
8-132
Rev A0 010905
Preliminary
Evaluation Board Schematic IF@135MHz
(Download Bill of Materials from www.rfmd.com.)
FL1* Saw Filter
GND GND
RF2488
50 strip R3* 0 L2 4.7 nH Bias VCC C10 5 pF L6 4.7 nH C3 100 pF 50 strip L3 2.2 nH 24 1 23 22 21 20 19 18 17 16 15 14 13 7 8 9 10 11 L7 8.2 nH C25 3 pF (HQ) L12 180 nH L5 2.2 nH R7* 0 IF OUT SELECT R8 0 C17 10 pF L16 560 nH R10 820 C21 1 nF 12 C16 10 pF C15 10 pF MX VCC C19 1 nF L11 180 nH C14 10 pF L15 560 nH R9 820 C20 1 nF C6 100 pF R4 0
I/O GND
I/O GND
R2* 0
J2 MX1 IN
J1 LNA1 OUT
50 strip R1 0 C1 1.2 pF L1 15 nH C5 100 pF C2 100 pF
TX/RX J3 LO1 IN Band Select
LNA1 VCC C4 100 pF GAIN SEL TRL L8 56 nH J4 LNA1 IN J5 LNA2 IN 50 strip 50 strip C11* DNI C13 33 nF C12 33 nF 2 3 L10 2.2 nH L9* DNI 4 5 TRL 6 LNA2 VCC
L13 180 nH C22 8 pF
50 strip
J7 IF1 OUT
C7 100 pF C18 1 nF C23 8 pF L14 180 nH
8
50 strip 50 strip 50 strip J6 IF2 OUT J9 LO2 IN J10 MX2 IN
C8 10 pF
L17 10 nH C24 100 pF R6* 0
L4 12 nH
2488400-
J8 LNA2 OUT
50 strip
R5 0
C9 100 pF
I/O GND
I/O GND
FL2* Saw Filter NOTE: Parts with * after reference designator should not be populated on evaluation board. VCC P1 1 2 CON2 GND 1 3 5 7 9 11 13 15 C26 + 1 F C27 1 nF HEADER 8X2 JP1 2 4 6 8 10 12 14 16 C28 1 nF R11 10 k C29 1 nF R12 10 k C30 1 nF C31 1 nF R13 10 k C32 1 nF R14 10 k C33 1 nF C34 1 nF LNA1 VCC LNA2 VCC MX VCC IF Out Select Gain Select Bias VCC Band Select TX/RX C35 1 nF
Rev A0 010905
8-133
FRONT-ENDS
GND
GND
RF2488
Evaluation Board Layout Board Size 2.3" x 1.9"
Board Thickness 0.062", Board Material FR-4, Multi-Layer
Assembly Top
Preliminary
8
FRONT-ENDS
Inner 1
Inner 2
8-134
Rev A0 010905
Preliminary
Back
RF2488
8
FRONT-ENDS
Rev A0 010905
8-135
RF2488
LNA1 Gain versus Frequency
20.0
Preliminary
LNA1 Gain versus Supply Voltage
Gain Select=High, 880 MHz
20.0
Gain Select=High, VCC=3 V
19.0
19.0
Gain (dB)
17.0
Gain (dB)
+25C Gain -40C Gain +85C Gain
18.0
18.0
17.0
16.0
16.0 +25C Gain -40C Gain +85C Gain 15.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 2.6 2.7 2.8 2.9 3.0 3.1 3.2 3.3 3.4
15.0 865.0
Frequency (MHz)
Supply Voltage (V)
LNA1 Noise Figure versus Frequency
2.0 1.8
LNA1 Noise Figure versus Supply Voltage
Gain Select=High, 880 MHz
2.0 1.8 1.6 1.4
Gain Select=High, VCC=3 V
8
Noise Figure (dB)
1.6 1.4 1.2 1.0 0.8 0.6 0.4 0.2 0.0 865.0 +25C Noise Figure -40C Noise Figure +85C Noise Figure
Noise Figure (dB)
FRONT-ENDS
1.2 1.0 0.8 0.6 0.4 0.2 0.0 +25C Noise Figure -40C Noise Figure +85C Noise Figure 2.6 2.7 2.8 2.9 3.0 3.1 3.2 3.3 3.4
870.0
875.0
880.0
885.0
890.0
895.0
900.0
Frequency (MHz)
Supply Voltage (V)
LNA1 Input IP3 versus Frequency
5.0
LNA1 Input IP3 versus Supply Voltage
Gain Select=High, 880/881 MHz, -25 dBm per tone
5.0
Gain Select=High, -25 dBm per tone, 1 MHz Separation, VCC=3 V
4.0
4.0
IIP3 (dBm)
2.0
IIP3 (dBm)
3.0
3.0
2.0
1.0 +25C IIP3 -40C IIP3 +85C IIP3 0.0 865.0
1.0 +25C IIP3 -40C IIP3 +85C IIP3 0.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 2.6 2.7 2.8 2.9 3.0 3.1 3.2 3.3 3.4
Frequency (MHz)
Supply Voltage (V)
8-136
Rev A0 010905
Preliminary
Mixer1 Gain versus Frequency
12.0
RF2488
Mixer1 Gain versus Supply Voltage
12.0 12.0
VCC=3 V, LO PIN=-6 dBm
880 MHz, LO PIN=-6 dBm
12.0
11.0
11.0
11.0
11.0
IFOUT1 Gain (dB)
IFOUT2 Gain (dB)
IFOUT1 Gain (dB)
10.0
10.0
10.0
10.0
9.0
+25C Gain, IFout1 -40C Gain, IFout1 +85C Gain, IFout1 +25C Gain, IFout2 -40C Gain, IFout2 +85C Gain, IFout2 870.0 875.0 880.0 885.0 890.0 895.0
9.0
9.0
+25C Gain, IFout1 -40C Gain, IFout1 +85C Gain, IFout1 +25C Gain, IFout2 -40C Gain, IFout2 +85C Gain, IFout2 2.6 2.7 2.8 2.9 3.0 3.1 3.2 3.3 3.4
9.0
8.0 865.0
8.0 900.0
8.0
8.0
Frequency (MHz)
Supply Voltage (V)
Mixer1 Noise Figure versus Frequency
13.0
Mixer1 Noise Figure versus Supply Voltage
13.0 13.0
VCC=3 V, LO PIN=-6 dBm
880 MHz, LO PIN=-6 dBm
13.0
12.0
12.0
12.0
12.0
IFOUT2 Gain (dB)
IFOUT1 Noise Figure (dB)
IFOUT2 Noise Figure (dB)
IFOUT1 Noise Figure (dB)
IFOUT2 Noise Figure (dB)
11.0
11.0
11.0
11.0
8
FRONT-ENDS
10.0
10.0
10.0
10.0
9.0
9.0
9.0
9.0
8.0
7.0
+25C NF, IFout1 -40C NF, IFout1 +85C NF, IFout1 +25C NF, IFout2 -40C NF, IFout2 +85C NF, IFout2 870.0 875.0 880.0 885.0 890.0 895.0
8.0
8.0
7.0
7.0
+25C NF, IFout1 -40C NF, IFout1 +85C NF, IFout1 +25C NF, IFout2 -40C NF, IFout2 +85C NF, IFout2 2.6 2.7 2.8 2.9 3.0 3.1 3.2 3.3 3.4
8.0
7.0
6.0 865.0
6.0 900.0
6.0
6.0
Frequency (MHz)
Supply Voltage (V)
Mixer1 Input IP3 versus Frequency
14.0
Mixer1 Input IP3 versus Supply Voltage
14.0 14.0
-25 dBm per tone, 1 MHz Separation, VCC=3 V, LO PIN=-6 dBm
-25 dBm per tone, 880/881 MHz, LO PIN=-6 dBm
14.0
12.0
12.0
12.0
12.0
10.0
10.0
10.0
10.0
IFOUT1 IIP3 (dBm)
IFOUT2 IIP3 (dBm)
IFOUT1 IIP3 (dBm)
8.0
8.0
8.0
8.0
6.0
6.0
6.0
6.0
4.0
2.0
+25C IIP3, IFout1 -40C IIP3, IFout1 +85C IIP3, IFout1 +25C IIP3, IFout2 -40C IIP3, IFout2 +85C IIP3, IFout2 870.0 875.0 880.0 885.0 890.0 895.0
4.0
4.0
2.0
2.0
+25C IIP3, IFout1 -40C IIP3, IFout1 +85C IIP3, IFout1 +25C IIP3, IFout2 -40C IIP3, IFout2 +85C IIP3, IFout2 2.6 2.7 2.8 2.9 3.0 3.1 3.2 3.3 3.4
4.0
2.0
0.0 865.0
0.0 900.0
0.0
0.0
Frequency (MHz)
Supply Voltage (V)
Rev A0 010905
8-137
IFOUT2 IIP3 (dBm)
RF2488
LNA2 Gain versus Frequency
18.0
Preliminary
LNA2 Gain versus Supply Voltage
Gain Select=High, 1960 MHz
18.0
Gain Select=High, VCC=3 V
17.0
17.0
Gain (dB)
15.0
Gain (dB)
+25C Gain -40C Gain +85C Gain
16.0
16.0
15.0
14.0
14.0 +25C Gain -40C Gain +85C Gain 13.0 1930.0 1940.0 1950.0 1960.0 1970.0 1980.0 1990.0 2000.0 2.6 2.7 2.8 2.9 3.0 3.1 3.2 3.3 3.4
13.0 1920.0
Frequency (MHz)
Supply Voltage (V)
LNA2 Noise Figure versus Frequency
2.5
LNA2 Noise Figure versus Supply Voltage
Gain Select=High, 1960 MHz
2.5
Gain Select=High, VCC=3 V
8
Noise Figure (dB)
2.0
2.0
FRONT-ENDS
1.5
Noise Figure (dB)
1.5
1.0
1.0
0.5 +25C Noise Figure -40C Noise Figure +85C Noise Figure 0.0 1920.0
0.5 +25C Noise Figure -40C Noise Figure +85C Noise Figure 0.0 1930.0 1940.0 1950.0 1960.0 1970.0 1980.0 1990.0 2000.0 2.6 2.7 2.8 2.9 3.0 3.1 3.2 3.3 3.4
Frequency (MHz)
Supply Voltage (V)
LNA2 Input IP3 versus Frequency
5.0
LNA2 Input IP3 versus Supply Voltage
Gain Select=High, 1960/1961 MHz, -25 dBm per tone
5.0
Gain Select=High, -25 dBm per tone, 1 MHz Separation, VCC=3 V
4.0
4.0
IIP3 (dBm)
2.0
IIP3 (dBm)
+25C IIP3 -40C IIP3 +85C IIP3
3.0
3.0
2.0
1.0
1.0 +25C IIP3 -40C IIP3 +85C IIP3 0.0 1930.0 1940.0 1950.0 1960.0 1970.0 1980.0 1990.0 2000.0 2.6 2.7 2.8 2.9 3.0 3.1 3.2 3.3 3.4
0.0 1920.0
Frequency (MHz)
Supply Voltage (V)
8-138
Rev A0 010905
Preliminary
Mixer2 Gain versus Frequency
13.0
RF2488
Mixer2 Gain versus Supply Voltage
13.0 13.0
VCC=3 V, LO PIN=-6 dBm
1960 MHz, LO PIN=-6 dBm
13.0
12.0
12.0
12.0
12.0
IFOUT1 Gain (dB)
IFOUT2 Gain (dB)
IFOUT1 Gain (dB)
11.0
11.0
11.0
11.0
10.0 +25C Gain, IFout1 -40C Gain, IFout1 +85C Gain, IFout1 +25C Gain, IFout2 -40C Gain, IFout2 +85C Gain, IFout2 1930.0 1940.0 1950.0 1960.0 1970.0 1980.0 1990.0
10.0
10.0
10.0
9.0
9.0
9.0
+25C Gain, IFout1 -40C Gain, IFout1 +85C Gain, IFout1 +25C Gain, IFout2 -40C Gain, IFout2 +85C Gain, IFout2 2.6 2.7 2.8 2.9 3.0 3.1 3.2 3.3 3.4
9.0
8.0 1920.0
8.0 2000.0
8.0
8.0
Frequency (MHz)
Supply Voltage (V)
Mixer2 Noise Figure versus Frequency
12.0
Mixer2 Noise Figure versus Supply Voltage
12.0 12.0
VCC=3 V, LO PIN=-6 dBm
1960 MHz, LO PIN=-6 dBm
12.0
11.0
11.0
11.0
11.0
IFOUT2 Gain (dB)
IFOUT1 Noise Figure (dB)
IFOUT2 Noise Figure (dB)
IFOUT1 Noise Figure (dB)
10.0
10.0
10.0
10.0
IFOUT2 Noise Figure (dB)
8
FRONT-ENDS
9.0
9.0
9.0
9.0
8.0 +25C NF, IFout1 -40C NF, IFout1 +85C NF, IFout1 +25C NF, IFout2 -40C NF, IFout2 +85C NF, IFout2 1930.0 1940.0 1950.0 1960.0 1970.0 1980.0 1990.0
8.0
8.0 +25C NF, IFout1 -40C NF, IFout1 +85C NF, IFout1 +25C NF, IFout2 -40C NF, IFout2 +85C NF, IFout2 2.6 2.7 2.8 2.9 3.0 3.1 3.2 3.3 3.4
8.0
7.0
7.0
7.0
7.0
6.0 1920.0
6.0 2000.0
6.0
6.0
Frequency (MHz)
Supply Voltage (V)
Mixer2 Input IP3 versus Frequency
10.0
Mixer2 Input IP3 versus Supply Voltage
10.0 10.0
-25 dBm per tone, 1 MHz Separation, VCC=3 V, LO PIN=-6 dBm
-25 dBm per tone, 1960/1961 MHz, LO PIN=-6 dBm
10.0
9.0
9.0
8.0
8.0
8.0
8.0
IFOUT1 IIP3 (dBm)
IFOUT2 IIP3 (dBm)
IFOUT1 IIP3 (dBm)
7.0
7.0
6.0
6.0
6.0
6.0
5.0 +25C IIP3, IFout1 -40C IIP3, IFout1 +85C IIP3, IFout1 +25C IIP3, IFout2 -40C IIP3, IFout2 +85C IIP3, IFout2 1930.0 1940.0 1950.0 1960.0 1970.0 1980.0 1990.0
5.0
4.0
4.0
4.0
3.0
3.0
+25C IIP3, IFout1 -40C IIP3, IFout1 +85C IIP3, IFout1 +25C IIP3, IFout2 -40C IIP3, IFout2 +85C IIP3, IFout2 2.6 2.7 2.8 2.9 3.0 3.1 3.2 3.3 3.4
4.0
2.0 1920.0
2.0 2000.0
2.0
2.0
Frequency (MHz)
Supply Voltage (V)
Rev A0 010905
8-139
IFOUT2 IIP3 (dBm)
RF2488
LNA1+Mixer1 Gain versus Frequency
28.0
Preliminary
LNA1+Mixer1 Gain versus Supply Voltage
28.0 28.0
Gain Select=High, VCC=3 V, LO PIN=-6dBm
Gain Select=High, 880 MHz, LO PIN=-6dBm
28.0
27.0
27.0
27.0
27.0
IFOUT1 Gain (dB)
IFOUT2 Gain (dB)
IFOUT1 Gain (dB)
26.0
26.0
26.0
26.0
25.0
25.0
25.0
25.0
24.0
+25C Gain, IFout1 -40C Gain, IFout1 +85C Gain, IFout1 +25C Gain, IFout2 -40C Gain, IFout2 +85C Gain, IFout2 870.0 875.0 880.0 885.0 890.0 895.0
24.0
24.0
+25C Gain, IFout1 -40C Gain, IFout1 +85C Gain, IFout1 +25C Gain, IFout2 -40C Gain, IFout2 +85C Gain, IFout2 2.6 2.7 2.8 2.9 3.0 3.1 3.2 3.3 3.4
24.0
23.0 865.0
23.0 900.0
23.0
23.0
Frequency (MHz)
Supply Voltage (V)
LNA1+Mixer1 Noise Figure versus Frequency
3.5
LNA1+Mixer1 Noise Figure versus Supply Voltage
3.5 3.0
Gain Select=High, VCC=3 V, LO PIN=-6 dBm
Gain Select=High, 880 MHz, LO PIN=-6 dBm
3.0
3.0
3.0
2.5
2.5
8
IFOUT1 NF (dBm)
2.5
2.5 2.0 2.0
IFOUT2 NF (dBm)
IFOUT1 NF (dBm)
FRONT-ENDS
2.0
2.0
1.5
1.5
1.5
1.5
1.0 1.0 +25C NF, IFout1 -40C NF, IFout1 +85C NF, IFout1 +25C NF, IFout2 -40C NF, IFout2 +85C NF, IFout2 870.0 875.0 880.0 885.0 890.0 895.0 1.0 +25C NF, IFout1 -40C NF, IFout1 +85C NF, IFout1 +25C NF, IFout2 -40C NF, IFout2 +85C NF, IFout2 2.6 2.7 2.8 2.9 3.0 3.1 3.2 3.3 3.4
1.0
0.5
0.5
0.5
0.5
0.0 865.0
0.0 900.0
0.0
0.0
Frequency (MHz)
Supply Voltage (V)
LNA1+Mixer1 Input IP3 versus Frequency
Gain Select=High, -40 dBm per tone, 1 MHz Separation, VCC=3 V, LO=-6 dBm -3.0 -3.0 -4.0
LNA1+Mixer1 Input IP3 versus Supply Voltage
Gain Select=High, 880/881 MHz, -40 dBm per tone, LO=-6 dBm -4.0
-5.0
-5.0
-6.0
-6.0
-7.0
-7.0
IFOUT1 IIP3 (dBm)
IFOUT2 IIP3 (dBm)
IFOUT1 IIP3 (dBm)
-9.0
-9.0
-10.0
-10.0
-11.0
-11.0
-12.0 +25C IIP3, IFout1 -40C IIP3, IFout1 +85C IIP3, IFout1 +25C IIP3, IFout2 -40C IIP3, IFout2 +85C IIP3, IFout2 2.6 2.7 2.8 2.9 3.0 3.1 3.2 3.3 3.4
-12.0
-13.0
-15.0
+25C IIP3, IFout1 -40C IIP3, IFout1 +85C IIP3, IFout1 +25C IIP3, IFout2 -40C IIP3, IFout2 +85C IIP3, IFout2 870.0 875.0 880.0 885.0 890.0 895.0
-13.0
-15.0
-14.0
-14.0
-17.0 865.0
-17.0 900.0
-16.0
-16.0
Frequency (MHz)
Supply Voltage (V)
8-140
Rev A0 010905
IFOUT2 IIP3 (dBm)
-8.0
-8.0
IFOUT2 NF (dBm)
IFOUT2 Gain (dB)
Preliminary
LNA1+Mixer1 Gain versus LO Amplitude
28.0
RF2488
LNA1+Mixer1 Noise Figure versus LO Amplitude
28.0 3.0
Gain Select=High, 880 MHz, VCC=3.0 V
Gain Select=High, 880 MHz, VCC=3 V
3.0
2.5 27.0 27.0
2.5
2.0
2.0
IFOUT1 NF (dBm)
26.0
26.0
1.5
1.5
25.0
25.0
1.0 +25C Gain, IFout1 -40C Gain, IFout1 +85C Gain, IFout1 +25C Gain, IFout2 -40C Gain, IFout2 +85C Gain, IFout2 -9.0 -8.0 -7.0 -6.0 -5.0 -4.0 -3.0 -2.0 -1.0 0.0 1.0 +25C NF, IFout1 -40C NF, IFout1 +85C NF, IFout1 +25C NF, IFout2 -40C NF, IFout2 +85C NF, IFout2 -9.0 -8.0 -7.0 -6.0 -5.0 -4.0 -3.0 -2.0 -1.0 0.0 1.0
1.0
24.0
24.0 0.5
0.5
23.0 -10.0
23.0
0.0 -10.0
0.0
LO Amplitude (dBm)
LO Amplitude (dBm)
LNA1+Mixer1 Input IP3 versus LO Amplitude
Gain Select=High, 880/881 MHz, -40 dBm per tone, VCC=3.0 V -3.0 -3.0 20.0
LNA1+Mixer1 Current versus Supply Voltage
Gain Select=High, 880 MHz, LO PIN=-6dBm
-5.0
-5.0 18.0
IFOUT2 NF (dBm)
IFOUT1 Gain (dB)
IFOUT2 Gain (dB)
-7.0
-7.0
8
FRONT-ENDS
+25C Current -40C Current +85C Current 2.6 2.7 2.8 2.9 3.0 3.1 3.2 3.3 3.4
IFOUT1 IIP3 (dBm)
IFOUT2 IIP3 (dBm)
Current (mA)
-9.0
-9.0
16.0
-11.0
-11.0
14.0
-13.0 +25C IIP3, IFout1 -40C IIP3, IFout1 +85C IIP3, IFout1 +25C IIP3, IFout2 -40C IIP3, IFout2 +85C IIP3, IFout2 -8.0 -7.0 -6.0 -5.0 -4.0 -3.0 -2.0 -1.0 0.0 1.0
-13.0 12.0 -15.0
-15.0
-17.0 -10.0 -9.0
-17.0
10.0
LO Amplitude (dBm)
Supply Voltage (V)
LNA2+Mixer2 Gain versus Frequency
28.0
LNA2+Mixer2 Gain versus Supply Voltage
28.0 27.0
Gain Select=High, VCC=3 V, LO PIN=-6dBm
Gain Select=High, 1960 MHz, LO PIN=-6dBm
27.0
26.0 26.0 26.0 25.0
26.0
25.0
IFOUT1 Gain (dB)
IFOUT2 Gain (dB)
IFOUT1 Gain (dB)
24.0
24.0
24.0
24.0
23.0
23.0
22.0
+25C Gain, IFout1 -40C Gain, IFout1 +85C Gain, IFout1 +25C Gain, IFout2 -40C Gain, IFout2 +85C Gain, IFout2 1930.0 1940.0 1950.0 1960.0 1970.0 1980.0 1990.0
22.0 22.0 21.0
+25C Gain, IFout1 -40C Gain, IFout1 +85C Gain, IFout1 +25C Gain, IFout2 -40C Gain, IFout2 +85C Gain, IFout2 2.6 2.7 2.8 2.9 3.0 3.1 3.2 3.3 3.4
22.0
21.0
20.0 1920.0
20.0 2000.0
20.0
20.0
Frequency (MHz)
Supply Voltage (V)
Rev A0 010905
8-141
IFOUT2 Gain (dB)
RF2488
LNA2+Mixer2 Noise Figure versus Frequency
3.5
Preliminary
LNA2+Mixer2 Noise Figure versus Supply Voltage
3.5 3.5
Gain Select=High, VCC=3 V, LO PIN=-6 dBm
Gain Select=High, 1960 MHz, LO PIN=-6 dBm
3.5
3.0
3.0
3.0
3.0
2.5
2.5
2.5
2.5
IFOUT1 NF (dBm)
IFOUT2 NF (dBm)
IFOUT1 NF (dBm)
2.0
2.0
2.0
2.0
1.5
1.5
1.5
1.5
1.0
+25C NF, IFout1 -40C NF, IFout1 +85C NF, IFout1 +25C NF, IFout2 -40C NF, IFout2 +85C NF, IFout2 1930.0 1940.0 1950.0 1960.0 1970.0 1980.0 1990.0
1.0
1.0
+25C NF, IFout1 -40C NF, IFout1 +85C NF, IFout1 +25C NF, IFout2 -40C NF, IFout2 +85C NF, IFout2 2.6 2.7 2.8 2.9 3.0 3.1 3.2 3.3 3.4
1.0
0.5
0.5
0.5
0.5
0.0 1920.0
0.0 2000.0
0.0
0.0
Frequency (MHz)
Supply Voltage (V)
LNA2+Mixer2 Input IP3 versus Frequency
Gain Select=High, -40 dBm per tone, 1 MHz Separation, VCC=3 V, LO=-6 dBm -4.0 -4.0 -4.0
LNA2+Mixer2 Input IP3 versus Supply Voltage
Gain Select=High, 1960/1961 MHz, -40 dBm per tone, LO=-6 dBm -4.0
8
IFOUT1 IIP3 (dBm)
-6.0
-6.0
-6.0
-6.0
IFOUT2 IIP3 (dBm)
IFOUT1 IIP3 (dBm)
FRONT-ENDS
-8.0
-8.0
-8.0
-8.0
-10.0
-10.0
-10.0
-10.0
-12.0
+25C IIP3, IFout1 -40C IIP3, IFout1 +85C IIP3, IFout1 +25C IIP3, IFout2 -40C IIP3, IFout2 +85C IIP3, IFout2 1940.0 1950.0 1960.0 1970.0 1980.0 1990.0
-12.0
-12.0
+25C IIP3, IFout1 -40C IIP3, IFout1 +85C IIP3, IFout1 +25C IIP3, IFout2 -40C IIP3, IFout2 +85C IIP3, IFout2 2.6 2.7 2.8 2.9 3.0 3.1 3.2 3.3 3.4
-12.0
-14.0 1920.0 1930.0
-14.0 2000.0
-14.0
-14.0
Frequency (MHz)
Supply Voltage (V)
LNA2+Mixer2 Gain versus LO Amplitude
27.0
LNA2+Mixer2 Noise Figure versus LO Amplitude
27.0 3.5
Gain Select=High, 1960 MHz, VCC=3.0 V
Gain Select=High, 1960 MHz, VCC=3 V
3.5
26.0
26.0
3.0
3.0
25.0
25.0
2.5
2.5
IFOUT1 NF (dBm)
24.0
24.0
2.0
2.0
23.0
23.0
1.5
1.5
22.0
21.0
+25C Gain, IFout1 -40C Gain, IFout1 +85C Gain, IFout1 +25C Gain, IFout2 -40C Gain, IFout2 +85C Gain, IFout2
22.0
1.0
+25C NF, IFout1 -40C NF, IFout1 +85C NF, IFout1 +25C NF, IFout2 -40C NF, IFout2 +85C NF, IFout2 -9.0 -8.0 -7.0 -6.0 -5.0 -4.0 -3.0 -2.0 -1.0 0.0 1.0
1.0
21.0
0.5
0.5
20.0 -10.0
20.0 -9.0 -8.0 -7.0 -6.0 -5.0 -4.0 -3.0 -2.0 -1.0 0.0 1.0
0.0 -10.0
0.0
LO Amplitude (dBm)
LO Amplitude (dBm)
8-142
Rev A0 010905
IFOUT2 NF (dBm)
IFOUT1 Gain (dB)
IFOUT2 Gain (dB)
IFOUT2 IIP3 (dBm)
IFOUT2 NF (dBm)
Preliminary
LNA2+Mixer2 Input IP3 versus LO Amplitude
Gain Select=High, 1960/1961 MHz, -40 dBm per tone, VCC=3.0 V -2.0 -2.0 28.0
RF2488
LNA2+Mixer2 Current versus Supply Voltage
Gain Select=High, 1960 MHz, LO PIN=-6dBm
26.0 -4.0 -4.0 24.0
IFOUT1 IIP3 (dBm)
IFOUT2 IIP3 (dBm)
-6.0
-6.0
-8.0
Current (mA)
22.0
-8.0
20.0
18.0
-10.0 +25C IIP3, IFout1 -40C IIP3, IFout1 +85C IIP3, IFout1 +25C IIP3, IFout2 -40C IIP3, IFout2 +85C IIP3, IFout2 -8.0 -7.0 -6.0 -5.0 -4.0 -3.0 -2.0 -1.0 0.0 1.0
-10.0
16.0 -12.0 14.0 +25C Current -40C Current +85C Current -14.0 12.0 2.6 2.7 2.8 2.9 3.0 3.1 3.2 3.3 3.4
-12.0
-14.0 -10.0 -9.0
LO Amplitude (dBm)
Supply Voltage (V)
8
FRONT-ENDS
Rev A0 010905
8-143
RF2488
Preliminary
8
FRONT-ENDS
8-144
Rev A0 010905

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