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RF2444
8
Typical Applications
* WLAN or Wireless Local Loop * Digital Communication Systems * Part of 2.4GHz Chipset * Portable Battery-Powered Equipment
HIGH FREQUENCY LNA/MIXER
* Spread-Spectrum Communication Systems * UHF Digital and Analog Receivers
Product Description
The RF2444 is a monolithic integrated UHF receiver front end suitable for 2.4GHz ISM band applications. The IC contains all of the required components to implement the RF functions of the receiver except for the passive filtering and LO generation. It contains an LNA (low-noise amplifier), a second RF amplifier and a doubly balanced mixer. The output of the LNA is made available as an output to permit the insertion of a bandpass filter between the LNA and the RF/Mixer section. The mixer outputs can be selectively disabled to allow for the IF filter to be used in the transmit mode.
-A3.90 + 0.10 0.25 + 0.05 0.05 + 0.05 Note 3
4.90 + 0.20
0.65
NOTES: 1. Shaded lead is pin 1. 2. Lead coplanarity - 0.10 with respect to datum "A". 3. Lead standoff is specified from the lowest point on the package underside.
6.00 + 0.20
1.40 + 0.10
EXPOSED DIE FLAG
Dimensions in mm. 8 MAX 0 MIN 3.302
8
0.60 + 0.15 0.24 0.20 2.286
Optimum Technology Matching(R) Applied
Package Style: SSOP-16 EDF Slug
uSi Bi-CMOS
Si BJT
GaAs HBT SiGe HBT
GaAs MESFET Si CMOS
Features
* Single 2.7V to 3.6V Power Supply * 2400MHz to 2500MHz Operation
GAIN SEL 1 LNA LNA IN 2 PD 3 VCC1 4 VCC2 5 MIX OUT- 6 MIX OUT+ 7 MIXER LO IN 8 BACKSIDE GND RF AMP Bias Circuits
16 VCC4 15 LNA OUT 14 NC 13 NC 12 MIXIN 11 GND3 10 VCC3 9 RX EN
* Two Gain Settings: 28dB or 12dB * 4.5dB Cascaded NF, High Gain Mode * 20mA DC Current Consumption * Input IP3: -23dBm or -8dBm
Ordering Information
RF2444 High Frequency LNA/Mixer RF2444 PCBA-H Fully Assembled Evaluation Board (2.5GHz)
Functional Block Diagram
RF Micro Devices, Inc. 7625 Thorndike Road Greensboro, NC 27409, USA
Tel (336) 664 1233 Fax (336) 664 0454 http://www.rfmd.com
Rev A3 010717
8-53
FRONT-ENDS
RF2444
Absolute Maximum Ratings Parameter
Supply Voltage Input LO and RF Levels Operating Ambient Temperature Storage Temperature Moisture Sensitivity
Rating
Unit
VDC dBm C C
Refer to "Handling of PSOP and PSSOP Products" on page 16-15 for special handling information.
-0.5 to 3.6 +6 -40 to +85 -40 to +150 JEDEC Level 5 @ 220C
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 Cascade Gain Cascade IP3 Cascade Noise Figure
Specification Min. Typ. Max.
2400 to 2500 280 28 12 -23 -8 4.5 18 -28 -14 2.3 7 2:1 -3 -3 10 -6 22 50 10 50 -17 18 4 -15 -10 42 15 0
Unit
Condition
T = 25C, VCC =3.3V, RF=2400 MHz, LO=2120MHz, -1 0 dBm
10
500
8
FRONT-ENDS
Input P1dB
MHz MHz dB dB dBm dBm dB dB dBm dBm dB dB dBm dBm dB dB dB dB dBm dB k dBm dB dB
IF=280MHz, GAIN SEL = 1 IF=280MHz, GAIN SEL = 0 Referenced to the input, GAIN SEL = 1 Referenced to the input, GAIN SEL = 0 Single sideband, GAIN SEL = 1 Single sideband, GAIN SEL = 0 GAIN SEL = 1 GAIN SEL = 0 GAIN SEL = 1 GAIN SEL = 0 No external matching GAIN SEL = 1 GAIN SEL = 0 GAIN SEL = 1 GAIN SEL = 0
LNA
Noise Figure Input VSWR Input IP3 Gain Reverse Isolation Output Impedance
RF Amp and Mixer
Noise Figure Input Impedance Input IP3 Conversion Power Gain Output Impedance Single sideband
With Current Combiner (1k between open collectors and 250 single ended load) Open Collector
LO Input
LO Level LO to RF Rejection LO to IF Rejection LO Input VSWR LO input to LNA input LO input to IF output
2:1 VCC -0.3 400 100 300 1000 200 V mV nS nS Voltage at the input of RX EN, PD and GAIN SEL From PD Going high. From RX EN Going high. PD = "1"
Power Down Control
Logic Controls "ON" Logic Controls "OFF" Turn on Time Turn on Time
8-54
Rev A3 010717
RF2444
Parameter
Power Supply
Voltage Current Consumption 2.7 3.3 20 20 12 3.6 26 25 16 1 V mA mA mA A GAIN SEL = 1, RX EN =1, PD = 1 GAIN SEL = 0, RX EN =1, PD = 1 GAIN SEL = X, RX EN =0, PD = 1 GAIN SEL = X, RX EN =X, PD = 0
Specification Min. Typ. Max.
Unit
Condition
8
FRONT-ENDS
Rev A3 010717
8-55
RF2444
Pin 1 2 3 4 Function GAIN SEL LNA IN PD VCC1 Description
LNA gain control. When GAIN SEL is >VCC - 300mV, LNA gain is at 10 dB. When GAIN SEL is <300mV, the LNA gain is -6dB. This pin is NOT internally DC blocked. An external blocking capacitor must be provided if the pin is connected to a device with DC present. If a blocking capacitor is required, a value of 2pF is recommended. The power enable pin. When PD is >VCC - 300mV, the part is biased on. When PD is <300mV, then the part is turned off and typically draws less than 1A. Supply voltage for bias circuits and logic control. A 10pF external bypass capacitor is required and an additional 0.01F is required if no other low frequency bypass capacitors are nearby. The trace length between the pin and the bypass capacitors should be minimized. The ground side of the bypass capacitors should connect immediately to ground plane. Supply voltage for LO_Buffer. A 10pF bypass capacitor is required and an additional 0.01F is required if there is no other low frequency bypass capacitor in the area. The trace length between the pin and the bypass capacitors should be minimized. The ground side of the bypass capacitors should connect immediately to ground plane. The inverting open collector output of the mixer. This pin needs to be externally biased and DC isolated from other parts of the circuit. This output can drive a Balun, with MIXOUT+, to convert to unbalanced to drive a SAW filter. The Balun can be either broadband (transformer) or narrowband (discrete LC matching). Alternatively, MIXOUT+ may be used alone to drive a SAW single-ended, with an RF choke (high Z at IF) from VCC to MIXOUT-. The non-inverting open collector output of the mixer. This pin needs to be externally biased and DC isolated from other parts of the circuit. This output can drive a Balun, with MIXOUT+, to convert to unbalanced to drive a SAW filter. The Balun can be either broadband (transformer) or narrowband (discrete LC matching). Alternatively, MIXOUT+ may be used alone to drive a SAW single-ended, with an RF choke (high Z at IF) from VCC to MIXOUT+. LO input pin. This input needs a DC blocking cap. External matching is recommended to 50.
Interface Schematic
See pin 16. See pin 16.
5
VCC2
See pin 8.
6
MIXOUT-
MIX OUT+
MIX OUT-
8
FRONT-ENDS
7
MIXOUT+
See pin 6.
8
LO IN
VCC2
LO IN
9 10 11 12
RX EN VCC3 GND3 MIX IN
This control pin allows the mixer output pins to be put into a high impedance state. This allows the transmit signal path to share the same IF filter as the receiver. Supply voltage for mixer preamp. Ground pin for mixer preamp. This lead inductance should be kept small. Mixer RF Input port. This pin is NOT internally DC blocked. An external blocking capacitor must be provided if the pin is connected to a device with DC present. A value of >22pF is recommended. To minimize the noise figure it is recommended to have a bandpass filter before this input. This will prevent the noise at the image frequency from being converted to the IF.
See pin 12. See pin 12.
VCC3
MIX IN
GND3
8-56
Rev A3 010717
RF2444
Pin 13 14 15 16 Function NC NC LNA OUT VCC4 Description Interface Schematic
RF signal output for external 50 filtering.The use of a filter here is optional but does provide for lower noise floor and better out-of-band rejection. Supply voltage for the LNA. This pin should be bypassed with a 10 pF capacitor to ground as close to the pin as possible. The shunt inductance from this pin to ground via the supply decoupling must be tuned to match the LNA output to 50 at the desired operating frequency.
See pin 16.
Microstrip EXTERNAL DECOUPLING VCC4 P2 LNA IN BIAS -16 dB P15 LNA OUT
P1 GAIN SEL
8
FRONT-ENDS
Rev A3 010717
8-57
RF2444
Theory of Operation
RF Micro Devices 2.4 GHz ISM Chipset
IL = 3-4 dB 2.4 to 2.483 GHz VGC1
RF2938 TQFP-48 EPP
RSSI
RF2444 SSOP-16 EPP
Gain Select
OUT Q
SAW
IL = 10 dB max
RX
LNA Dual Gain Modes -5 dB and +10 dB 15 dB Gain
RX
15 dB
DATA Q
IF Amp
-15 dB to 35 dB Gain OUT I
TX
15 dB Base Band Amp. Active Selectable LPF (fC = 1 MHz to 40 MHz) 0-30 dB Gain
Filter
2.4 to 2.483 GHz
TX
Discrete Pin Diode
DATA I
RF2517 SSOP-28 RF VCO IF VCO +45 -45
Dual Frequency Synthesizer
Filter
I INPUT
RF2126
23 dBm or 33 dBm External PA
10 dBm PA Driver
15 dB Gain Range
Filter
Selectable LPF Q INPUT
VGC2
IL = 3-4 dB 2.4 to 2.483 GHz
Figure 1. Entire Chipset Functional Block Diagram The RF2444 contains the LNA/Mixer for this chipset. The LNA is made from two stages including a common emitter amplifier stage with a power gain of 13dB and an attenuator which has an insertion loss of 3dB in high gain mode, and 17dB in low gain mode. The attenuator was put after the LNA so that system noise figure degradation would be minimized. A single gain stage was used prior to the image filter to maximize IP3 which minimizes the risk of large out-of-bad signals jamming the desired signal. The mixer on the RF2444 is also two stages. The first stage is a common emitter amp used to boost the total power gain prior to the lossy SAW filter, to convert to a differential signal to the input of the mixer, and to improve the noise figure of the mixer. The second stage is a double balanced mixer whose output is differential open collector. It is recommended that a "current combiner" is used (as shown in figure 2) at the mixer output to maximize conversion gain, but other loads can also be used. The current combiner is used to do a differential to single ended conversion for the SAW filter. C1, C2 and L1 are used to tune the circuit for a specific IF frequency. L2 is a choke to supply DC current to the mixer that is also used as a tuning element, along with C3, to match to the SAW filter's input impedance. RL is the SAW filter's input impedance. The mixer power conversion gain is +19dB when R1 is set to 1k. The conversion gain can be adjusted up ~5dB or down ~7dB by changing the value of R1. Once R1 is chosen, L2 and C3 can be used to tune the output for the SAW filter. 8-58 Rev A3 010717
VCC C1 L1 R1
Open Collector Mixer Output
8
FRONT-ENDS
C2 L2 C3 OUT RL
Figure 2. Current Combiner for Mixer Load The cascaded power gain of the LNA/Mixer is 29dB, which after insertion loss in the image filter (~3dB) and IF SAW filter (~10dB), still gives 16dB of gain prior to the IF amps. Because of this, the noise figure of the IF amps should not significantly degrade system noise figure. The LNA input should be matched for a good return loss for optimum gain and noise figure. To allow the designer to match each of these ports, 2-port s-parameter data is available for the LNA, and 1-port data is available for MIXER IN and LO IN.
RF2444
Application Schematic
22 nF GS 22 pF 1 LNA LNA IN 2 pF CE VCC1 VCC2 22 nF 3 pF 6 3 pF 1k 220 nH 7 MIXER 8 DIE FLAG (17) 9 2.7 nH 11 10 22 nF 3 4 5 RF AMP Bias Circuits 14 13 12 1.5 pF 4.7 nH 2 15 3 pF 16
4.7 F VCC4
Bandpass Filter
VCC3 4.7 F
22 nF IF OUT LO IN
47 nH
6.8 nH 4 pF C2 1 pF
OE
8
FRONT-ENDS
10 pF
Rev A3 010717
8-59
RF2444
Evaluation Board Schematic
(Download Bill of Materials from www.rfmd.com.)
P1 1 2 P2 GND VCC1, VCC2 1 2 3 4 C18 4.7 F GS CE GND VCC4 C17 4.7 F P3 1 2 3 VCC3 GND OE
C6 22 nF C10 GS 22 pF 1 16 LNA 2 15 Bias Circuits 14 13 RF AMP 12 11 10 MIXER 8 50 strip 50 strip C19 4 pF DIE FLAG (17)
2444400 Rev. A
VCC4 50 strip C7 3 pF 50 strip *R2 0 *C15 22 pF Bandpass Filter C8 1.5 pF L5 4.7 nH *R3 0 50 strip *C16 22 pF 50 strip
J1 LNA IN CE VCC1 VCC2
50 strip C1 2 pF
50 strip
J4 LNA OUT
3 4 C3 3 pF C4 3 pF R1 1k C11 22 nF 5 6 L2 220 nH 7
50 strip
50 strip
J5 MIX IN
9
L7 2.7 nH
C9 22 nF VCC3 OE
8
J3 IF OUT
C14 22 nF
L3 47 nH 50 strip
L1 6.8 nH C2 1 pF
FRONT-ENDS
50 strip J2 LO IN 50 strip C5 10 pF
*For cascaded configuration, jumpers R2 and R3 need to be installed with C15 and C16 taken out. *To test LNA and Mixer separately remove R2 and R3, and fit C15 and C16.
8-60
Rev A3 010717
RF2444
Evaluation Board Layout
Board Thickness 0.031", Board Material FR-4
8
FRONT-ENDS
NOTE: In the following charts, all cascaded data measured with a bandpass filter inserted between LNA OUT and MIX IN, having cut frequencies: fL =2400MHz, fM =2484MHz, and insertion loss=1.2dB.
Rev A3 010717
8-61
RF2444
LNA + Mixer Gain versus VCC (2.45 GHz), Attenuator Off
33.0 -24.0 -40C IIP3 32.0 -40C Gain 31.0 25C Gain 85C Gain 30.0 -26.0 -25.0 25C IIP3 85C IIP3
LNA + Mixer IIP3 versus VCC (2.45 GHz), Attenuator Off
IIP3 (dBm)
Gain (dB)
-27.0
29.0
-28.0
28.0 -29.0 27.0 -30.0
26.0
25.0 2.7 3.0 3.3 3.6
-31.0 2.7 3.0 3.3 3.6
VCC
VCC
LNA + Mixer Gain versus RF Frequency (3.3 V), Attenuator Off
34.00 -24.00
LNA + Mixer IIP3 versus RF Frequency (3.3V), Attenuator Off
-40C IIP3
33.00
-25.00
25C IIP3 85C IIP3
8
FRONT-ENDS
Gain (dB)
32.00 -40C Gain 31.00 25C Gain 85C Gain 30.00
-26.00
-27.00
IIP3 (dBm)
2.50
-28.00
29.00
-29.00
28.00
-30.00
27.00
-31.00
26.00 2.40
2.45
-32.00 2.40
2.45
2.50
RF Frequency (GHz)
RF Frequency (GHz)
LNA + Mixer Gain versus VCC (2.45 GHz), Attenuator On
14.0 -40C Gain 13.5 13.0 12.5 -9.2 25C Gain 85C Gain -9.0 -8.8 -8.6
LNA + Mixer IIP3 versus VCC (2.45 GHz), Attenuator On
-40C IIP3 25C IIP3
IIP3 (dBm)
Gain (dB)
12.0 11.5 11.0 10.5 10.0 9.5 9.0 2.7 3.0 3.3 3.6
-9.4 -9.6 -9.8 -10.0 -10.2 -10.4 2.7 3.0 3.3
85C IIP3
3.6
VCC
VCC
8-62
Rev A3 010717
RF2444
LNA + Mixer Gain versus RF Frequency (3.3 V), Attenuator On
15.00 14.50 14.00 13.50 13.00 -8.50 -40C Gain 25C Gain 85C Gain -8.00 -7.50 -7.00 -40C IIP3 25C IIP3 85C IIP3
LNA + Mixer IIP3 versus RF Frequency (3.3 V), Attenuator On
Gain (dB)
12.50 12.00 11.50 11.00 10.50 10.00
IIP3 (dBm)
2.45 2.50
-9.00
-9.50
-10.00
-10.50 9.50 9.00 2.40 -11.00 2.40
2.45
2.50
RF Frequency (GHz)
RF Frequency (GHz)
LNA + Mixer SSB Noise Figure versus VCC (2.45 GHz), Attenuator Off
5.6 25C NF 85C NF 5.4 -40C NF 5.00 5.50
LNA + Mixer SSB Noise Figure versus RF Frequency (3.3 V), Attenuator Off
25C NF 85C NF -40C NF
8
FRONT-ENDS
SSB Noise Figure (dB)
5.2
SSB Noise Figure (dB)
4.50
5.0
4.00
4.8
3.50 4.6
4.4 2.7 3.0 3.3 3.6
3.00 2.40
2.45
2.50
VCC
RF Frequency (GHz)
LNA + Mixer SSB Noise Figure versus VCC (2.45 GHz), Attenuator On
19.8 25C NF 19.6 19.4 85C NF -40C NF 18.00 19.00 20.00
LNA + Mixer SSB Noise Figure versus RF Frequency (3.3 V), Attenuator On
25C NF 85C NF -40C NF
SSB Noise Figure (dB)
19.0 18.8 18.6 18.4 18.2
SSB Noise Figure (dB)
19.2
17.00
16.00
15.00
14.00 18.0 17.8 2.7 3.0 3.3 3.6 13.00 2.40
2.45
2.50
VCC
RF Frequency (GHz)
Rev A3 010717
8-63
RF2444
LNA + Mixer Gain versus IF Frequency (3.3 V)
32.0 Gain -24.0 31.0 -25.0 30.0 -26.0 -23.0 IIP3
LNA + Mixer IIP3 versus IF Frequency (3.3 V)
IIP3 (dBm)
Gain (dB)
29.0
-27.0
-28.0 28.0 -29.0 27.0 -30.0
26.0 0.0 50.0 100.0 150.0 200.0 250.0 300.0 350.0 400.0 450.0 500.0
-31.0 0.0 50.0 100.0 150.0 200.0 250.0 300.0 350.0 400.0 450.0 500.0
IF Frequency (MHz)
IF Frequency (MHz)
12.7 25C LNA Icc 12.5 85C LNA Icc -40C LNA Icc
LNA ICC versus VCC (PD = 1, RX EN = 0)
21.0 25C Total Icc 85C Total Icc 20.5
Total ICC versus VCC (PD = 1, RX EN = 1)
8
FRONT-ENDS
ICC (mA)
-40C Total Icc
12.3 12.1 11.9 11.7 11.5 11.3 18.5 11.1 10.9 2.7 3.0 3.3 3.6 18.0 2.7 3.0 3.3 3.6 20.0
ICC (mA) VCC
19.5
19.0
VCC
Isolation
-13.00
-18.00
-23.00 LO-mixin
Isolation (dB)
-28.00
LO-LNAin LNAin-LNAout LO-IFout
-33.00
-38.00
-43.00
-48.00 2.12
2.17
2.22
LO Frequency (GHz)
8-64
Rev A3 010717
RF2444
LNA Gain versus VCC (2.45 GHz), Attenuator Off
10.5 10.4 10.3 10.2 -40C Gain 25C Gain 85C Gain -2.2 -2.1 -2.0 -40C IIP3 25C IIP3 85C IIP3
LNA IIP3 versus VCC (2.45 GHz), Attenuator Off
IIP3 (dBm)
Gain (dB)
10.1 10.0 9.9 9.8
-2.3
-2.4
-2.5
-2.6 9.7 9.6 9.5 2.7 3.0 3.3 3.6 -2.7
-2.8 2.7 3.0 3.3 3.6
VCC
VCC
LNA Gain versus VCC (2.45 GHz), Attenuator On
-4.0 -40C Gain -4.2 25C Gain 85C Gain -4.4 -2.2 -4.6 -2.0 -1.8
LNA IIP3 versus VCC (2.45 GHz), Attenuator On
8
IIP3 (dBm)
-40C IIP3 -2.4 25C IIP3 85C IIP3 -2.6
Gain (dB)
-4.8
-5.0
-5.2 -2.8 -5.4
-5.6 2.7 3.0 3.3 3.6
-3.0 2.7 3.0 3.3 3.6
VCC
VCC
LNA Gain versus RF Frequency (3.3 V), Attenuator Off
10.70 -40C Gain 10.60 10.50 10.40 -1.00 25C Gain 85C Gain -0.50 0.00
LNA IIP3 versus RF Frequency (3.3 V), Attenuator Off
-40C IIP3 25C IIP3 85C IIP3
IIP3 (dBm)
Gain (dB)
10.30 10.20 10.10 10.00 9.90
-1.50
-2.00
-2.50
-3.00 9.80 9.70 2.40 -3.50 2.40
2.45
2.50
2.45
2.50
RF Frequency (GHz)
RF Frequency (GHz)
Rev A3 010717
8-65
FRONT-ENDS
RF2444
LNA Gain versus RF Frequency (3.3 V), Attenuator On
-3.70 -40C Gain -3.90 -4.10 -4.30 -4.50 -4.70 -4.90 -2.60 -5.10 -5.30 -5.50 2.40 -2.70 -2.80 -2.90 2.40 25C Gain 85C Gain -2.10 -40C IIP3 -2.20 25C IIP3 85C IIP3 -2.00 -1.90
LNA IIP3 versus RF Frequency (3.3 V), Attenuator On
IIP3 (dBm)
2.45 2.50
Gain (dB)
-2.30 -2.40 -2.50
2.45
2.50
RF Frequency (GHz)
RF Frequency (GHz)
LNA Noise Figure versus VCC (2.45 GHz), Attenuator Off
2.32 2.30 2.28 2.26 -40C NF 25C NF 2.45 2.50
LNA Noise Figure versus RF Frequency (3.3 V), Attenuator Off
-40C NF 25C NF 85C NF 2.40
8
Noise Figure (dB)
85C NF
2.24 2.22 2.20 2.18 2.16 2.14
Noise Figure (dB)
3.00 3.30 3.60
2.35
FRONT-ENDS
2.30
2.25
2.20
2.15 2.12 2.10 2.70 2.10 2.40
2.45
2.50
VCC
RF Frequency (GHz)
LNA Noise Figure versus VCC (2.45 GHz), Attenuator On
9.0 -40C NF 8.5 25C NF 85C NF 8.0 8.00 8.50 9.00
LNA Noise Figure versus RF Frequency (3.3 V), Attenuator On
-40C NF 25C NF 85C NF
Noise Figure (dB)
7.5
Noise Figure (dB)
2.7 3.0 3.3 3.6
7.50
7.0
7.00
6.5
6.50
6.0
6.00
5.5
5.50
5.0
5.00 2.40
2.45
2.50
VCC
RF Frequency (GHz)
8-66
Rev A3 010717
RF2444
Mixer Gain versus VCC (2.45 GHz)
22.0 -40C Gain 25C Gain 21.0 85C Gain -15.0 -14.5 -40C IIP3 25C IIP3 85C IIP3
Mixer IIP3 versus VCC (2.45 GHz)
-15.5 20.0
IIP3 (dBm)
Gain (dB)
-16.0
19.0
-16.5
18.0 -17.0
17.0
-17.5
16.0 2.7 3.0 3.3 3.6
-18.0 2.7 3.0 3.3 3.6
VCC
VCC
Mixer Gain versus RF Frequency (3.3 V)
22.00 -15.00
Mixer IIP3 versus RF Frequency (3.3 V)
21.00 -40C Gain 20.00 25C Gain
-15.50
-40C IIP3 25C IIP3
-16.00
85C IIP3
8
FRONT-ENDS
2.45 2.50
IIP3 (dBm)
2.50
Gain (dB)
85C Gain 19.00
-16.50
-17.00
18.00 -17.50
17.00
-18.00
16.00 2.40
2.45
-18.50 2.40
RF Frequency (GHz)
RF Frequency (GHz)
Mixer SSB Noise Figure versus VCC (2.45 GHz)
13.5 -40C NF 25C NF 13.0 85C NF 12.00 13.00
Mixer SSB Noise Figure versus RF Frequency (3.3 V)
-40C NF 25C NF 85C NF
SSB Noise Figure (dB)
SSB Noise Figure (dB)
2.7 3.0 3.3 3.6
12.5
11.00
12.0
10.00
11.5
9.00
11.0
10.5
8.00
10.0
7.00 2.40
2.45
2.50
VCC
RF Frequency (GHz)
Rev A3 010717
8-67
RF2444
Mixer Gain versus LO Amplitude (VCC = 3.3 V, RF Frequency = 2.45 GHz)
20 Gain 19 -15 -14 IIP3
Mixer IIP3 versus LO Amplitude (VCC = 3.3 V, RF Frequency = 2.45 GHz)
18
-16
17
IIP3 (dBm)
-24 -22 -20 -18 -16 -14 -12 -10 -8 -6 -4 -2 0 2 4 6
Gain (dB)
-17
16
-18
15
-19
14
-20 -24 -22 -20 -18 -16 -14 -12 -10 -8 -6 -4 -2 0 2 4 6
LO Amplitude (dBm)
LO Amplitude (dBm)
8
FRONT-ENDS
8-68
Rev A3 010717

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