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Part: CX42053
Category:
RF & Microwaves
-> Front-End
-> Receiver
Description: 700-1000 MHZ Front-end Receiver
Company: Skyworks Solutions, Inc.
Datasheet: Download CX42053 datasheet File size : 1379 kB
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Datasheet text preview:
CX42053
700 1000 MHz High Dynamic Range, Diversity Receiver Front End
Skyworks' CX42053 is an integrated, high-dynamic range, low-noise receiver down converter for two-channel diversity systems. It includes a Low Noise Amplifier (LNA) followed by a double-balanced active mixer. The CX42053 has dual Local Oscillator (LO) inputs, selected using an external switch interface. The internal attenuator is integrated with the LNA. The attenuator function is also controlled using an externally controlled CMOS-compatible interface. Figure 1 shows a functional block diagram for the CX42053. The 24-pin Plastic Quad Flat Pack (PQFP) device package and pinout are shown in Figure 2.
Distinguishing Features
· High 3rd Order Input Intercept Point (IIP3) mixer and LNA · Wideband RF input frequency range (700 to 1000 MHz) · Single or two-channel applications · Use with LNA-mixer cascaded or mixer-only · Bias-selectable LNA/mixer functions · Integrated solid state attenuator · CMOS-compatible control interfaces · ±5 V supply operation · 20 °C to +85 °C operating range · Supports frequency hopping applications
Applications
· · · · Cellular and GSM communications Mobile radio systems Paging Industrial, Scientific, Medical (ISM) band Applications
IR FILTER
RF Balun
LNA_INA
L_GNDA
IF A RF A
LNA
Attenuator
24 GND 1
23
22
21
20
19 18 IFNA
ATTN CONTROL LO 1 LO 2 LO SELECT
Attenuator
Amp
LO_1
2 17 IFPA
ATTN
3 16 LO_GND
IF B RF B
LNA
LO_SEL
4 15 VDD
LO_2
5 14 IFPB 6 13 7 8 9 10 11 12 IFNB
VSS
RF Balun
IR FILTER
LNA_INB L_GNDB L_OUTB M_INPB
C1249
M_INNB
MGNDB
M_INNA
L_OUTA
MGNDA
M_INPA
Figure 1. CX42053 Functional Block Diagram
C1250
Figure 2. CX42053 Pinout 24-Pin PQFP Package
Data Sheet
Skyworks
Proprietary Information and Specifications Are Subject to Change
Doc. No. 101431B March 12, 2002
CX42053
Diversity Receiver Front End
Technical Description
The CX42053 consists of two identical channels, A and B, that were specifically designed for the purpose of diversity in base station applications. Each channel consists of a single-ended LNA and a doublebalanced differential mixer. The LNAs share a common CMOScompatible attenuator control switch, which bypasses the LNA, providing 20 dB of attenuation. Each channel shares two independent LO signals, LO1 and LO2, that are selected using a common CMOS-compatible control signal. With this ability, the device can be used in applications where frequency hopping is required.
The LNAs and mixers are independently biased. This allows design flexibility with power management functions in base station receivers.
Electrical and Mechanical Specifications
The signal pin assignments and functions are described in Table 1. The absolute maximum ratings of the CX42053 are provided in Table 2. The recommended operating conditions are specified in Table 3 and electrical specifications are provided in Table 4. Table 5 provides additional electrical specifications for full channel performance. Typical performance characteristics of the CX42053 are illustrated in Figures 3 through 9.
Table 1. CX42053 Signal Descriptions Pin #
1 2 3 4 5 6 7 8 9 10 11 12
Name
GND LO_1 ATTN LO_SEL LO_2 VSS LNA_INB L_GNDB L_OUTB MGNDB M_INPB M_INNB Ground
Description
Local oscillator 1 input for channels A and B Channels A and B attenuator control LO_1/LO_2 select control Local oscillator 2 input for channels A and B Negative supply voltage Channel B LNA input Channel B LNA ground Channel B LNA output Channel B mixer ground Channel B positive differential mixer input Channel B negative differential mixer input
Pin #
13 14 15 16 17 18 19 20 21 22 23 24
Name
IFNB IFPB VDD LO_GND IFPA IFNA M_INNA M_INPA MGNDA L_OUTA L_GNDA LNA_INA
Description
Channel B negative differential mixer IF output Channel B positive differential mixer IF output Positive supply voltage Local oscillator ground Channel A positive differential mixer IF output Channel A negative differential mixer IF output Channel A negative differential mixer input Channel A positive differential mixer input Channel A mixer ground Channel A LNA output Channel A LNA ground Channel A LNA input
2
Skyworks
Proprietary Information and Specifications Are Subject to Change
101431B March 12, 2002
Diversity Receiver Front End Table 2. CX42053 Absolute Maximum Ratings Parameter
Positive DC power supply Negative DC power supply Power dissipation Input power Thermal resistance Operating temperature Storage temperature
CX42053
Symbol
VDD VSS PD PIN RTH TOPR TSTG
Min
Typical
Max
+5.5 6.0 2.25 +15
Units
V V W dBm °C/W °C °C
+25 20 40 +85 +125
Note: No damage to device if only one parameter is applied at a time with other parameters at nominal conditions.
Table 3. CX42053 Recommended Operating Conditions Parameter
Positive DC supply voltage Negative DC supply voltage Operating temperature
Symbol
VDD VSS TOPR
Min
+4.75 4.75 0
Typical
+5.0 5.0
Max
+5.25 5.25 +50
Units
V V °C
101431B March 12, 2002
Skyworks
Proprietary Information and Specifications Are Subject to Change
3
CX42053 Table 4. CX42053 Electrical Characteristics Test Condition
Low Noise Amplifier Gain Noise Figure (NF) Input IP3 1 dB compression point RF RF input frequency RF input (Note 1) RF output (Note 1) Conversion gain RF = 700 MHz to 1000 MHz RF = 900 MHz, 50 RF = 700 MHz to 1000 MHz Mixer (Note 2) RF = 800 to 900 MHz, LO = 750 MHz RF = 800 to 900 MHz, LO = 950 MHz RF = 900 MHz, LO = 790 MHz RF = 900 MHz, LO = 1010 MHz SSB NF Input IP3 RF = 800 MHz to 1000 MHz, LO = 690 MHz RF = 700 MHz to 1000 MHz, LO = 1010 MHz RF = 900 MHz, LO= 790 MHz (mixer bias = 80 mA) RF = 900 MHz, LO = 790 MHz RF = 900 MHz, LO = 1010 MHz RF to IF leakage LO to IF leakage 1dB compression point (mixer bias = 80 mA) 1 dB compression point 1/2 IF product suppression Local Oscillator LO input frequency LO input (Note 1) LO level input Intermediate Frequency IF output frequency IF output (Note 1) 50 , IF = 50 MHz to 150 MHz 50 , IF = 110 MHz 50 1.5:1 1.5:1 50 5 700 1.5:1 0 RF = 900 MHz, LO = 790 MHz RF = 900 MHz, LO = 1010 MHz LO = 790 MHz LO = 1010 MHz +14 +10 +23 +19 +18 0.5 0.5 0 0 +1.0 +1.0 +2.0 +1.5 10 10 +27 +23 +22 50 50 45 50 +18 +14 75 700 1.5:1 1.5:1 1.5:1 16 3 12 14 1.8 18 5
Diversity Receiver Front End
(+25° C, Voltage Supply = ±5 V, LO = 0 dBm, RF Frequency = 900 MHz, IF Frequency = 110 MHz, Mixer Bias = 55 mA) °
Parameter
Min
Typical
Max
Units
dB
3.0
dB dBm dBm
1000 2.0:1 2.0:1 2.0:1
MHz VSWR VSWR VSWR dB dB dB dB
13 13
dB dB dBm dBm dBm dBm dBm dBm dBm dBm dBm
70 1000 2.0:1 +5 250 2.0:1 2.0:1
dBc MHz VSWR dBm MHz VSWR VSWR
Note 1: In a 50 system obtained with external matching components on input/output ports. See Figure 10 and Table 6 for matching network configuration and element values. Note 2: Include RF balun and IF transformer losses.
4
Skyworks
Proprietary Information and Specifications Are Subject to Change
101431B March 12, 2002
Diversity Receiver Front End Table 5. Full Channel Performance Min
CX42053
(+ 25° C, Voltage Supply = ±5 V, LO = 0 dBm, RF Frequency = 900 MHz, IF Frequency = 110 MHz) °
Parameter
RF input (Note 1) NF (Note 2) Gain (Note 3) Input IP3 (Note 4) 1 dB compression point (Note 5) 1/2 IF product suppression Channel A to B isolation LO leakage at RF input LO1 to LO2 isolation Supply current @ +5.0 V, both channels Supply current @ 5.0 V, both channels
Test Condition
Typical
1.5:1 3.0
Max
2.0:1 5.5
Units
VSWR dB dB dBm dBm dBm dBm
11 mixer bias = 80 mA mixer bias = 55 mA mixer bias = 80 mA mixer bias = 55 mA 9 5.5 +1 3 35 35
15 13 9.5 +5 +1 70 40 40 40 340 10 360 15 35 60
dBc dB dBm dB mA mA
Note 1: In a 50 system obtained with external matching network on LNA and mixer input ports. See Figure 10 and Table 6 for network elements and frequency ranges.
Note 2: Calculated using the following equation: NFCascaded
æ æ NFLNA ö æ æçç NFMixer + Loss IRfilter ö÷÷ ö ö çç ÷÷ ÷çç ÷ 10 ø ç è 10 ø ç 10 è - 1 ÷÷ = 10 × Log ç 10 +ç ÷÷ æ ö ç GLNA ÷ ç ç ÷ ÷÷ ç ç 10 ÷ ø ÷÷ ç ç 10 è øø è è
Note 3: Calculated using the following equation: ConversionGainCascaded = GLNA - LossIRfilter + GMixer
-1 æé ùö ç ÷ ú÷ çê ú÷ ê 1 1 Note 4: Calculated using the following equation: IIP3 = 10 × Log ç ê + ú ç ê æ IIP3Mixer - (GLNA - Loss IRfilter ) ö æ IIP 3LNA ö ú ÷ ÷ ç ç ÷ú ÷ çê ç ç ÷ ÷ 10 ç ê 10 è ø 10 è 10 ø ú ÷ û ë è ø
Note 5: Calculated using the following equation: P dB , system = ( P dB , Mixer - (GLNA - Loss IRfilter )) or ( P dB , LNA ), whichever is less 1 1 1
101431B March 12, 2002
Skyworks
Proprietary Information and Specifications Are Subject to Change
5
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