DATASHEET
AX5042
Version 2.2
2
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Document
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Type
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Version
Datasheet
Version 2.2
AX5042
Version 2.2
Datasheet AX5042
Table of Contents
3
Table of Contents
1.
Overview .................................................................................................................................... 6
1.1. Features ........................................................................................................................................... 6
1.2. Applications .................................................................................................................................... 6
2.
3.
Block Diagrams ......................................................................................................................... 7
Pin Function Descriptions .......................................................................................................... 8
3.1. Pinout Drawing ............................................................................................................................... 9
4.
Specifications .......................................................................................................................... 10
4.1. Absolute Maximum Ratings ........................................................................................................ 10
4.2. DC Characteristics ....................................................................................................................... 11
Supplies .......................................................................................................................................... 11
Logic ............................................................................................................................................... 12
4.3. AC Characteristics ....................................................................................................................... 13
Crystal Oscillator ........................................................................................................................... 13
RF Frequency Generation Subsystem (Synthesizer) ................................................................ 14
Transmitter...................................................................................................................................... 15
Receiver ......................................................................................................................................... 16
SPI Timing........................................................................................................................................ 18
Wire Mode Interface Timing........................................................................................................ 18
5.
Circuit Description ................................................................................................................... 19
5.1. Crystal Oscillator........................................................................................................................... 20
5.2. SYSCLK Output.............................................................................................................................. 20
5.3. PWRUP Input.................................................................................................................................. 20
5.4. RESET_N Input ................................................................................................................................ 21
5.5. DATA Input/Output and DCLK Output ..................................................................................... 21
5.6. RF Frequency Generation Subsystem....................................................................................... 22
VCO ................................................................................................................................................ 22
Version 2.2
Datasheet AX5042
4
Table of Contents
VCO Auto-Ranging ...................................................................................................................... 22
Loop Filter and Charge Pump .................................................................................................... 23
Registers ......................................................................................................................................... 23
5.7. RF Input and Output Stage (ANTP/ANTN) ................................................................................ 23
LNA.................................................................................................................................................. 23
I/Q mixer......................................................................................................................................... 23
PA .................................................................................................................................................... 23
5.8. Analog IF Filter .............................................................................................................................. 24
5.9. Digital IF Channel Filter and Demodulator............................................................................... 24
Registers ......................................................................................................................................... 24
5.10.
5.11.
Encoder.................................................................................................................................... 25
Framing and FIFO ................................................................................................................... 25
HDLC Mode ................................................................................................................................... 26
RAW Mode..................................................................................................................................... 26
802.15.4 (ZigBee)........................................................................................................................... 27
5.12.
5.13.
5.14.
5.15.
5.16.
RX AGC and RSSI .................................................................................................................... 27
Modulator ................................................................................................................................ 28
Automatic Frequency Control (AFC) .................................................................................. 28
PWRMODE Register ................................................................................................................ 29
Serial Peripheral Interface (SPI) ............................................................................................ 31
SPI Timing........................................................................................................................................ 31
5.17.
Wire Mode Interface.............................................................................................................. 32
Wire Mode Timing ......................................................................................................................... 32
6.
Register Bank Description ....................................................................................................... 33
6.1. Control Register Map................................................................................................................... 34
7.
Application Information.......................................................................................................... 37
7.1. Typical Application Diagram ..................................................................................................... 37
7.2. Antenna Interface Circuitry........................................................................................................ 38
Version 2.2
Datasheet AX5042
Table of Contents
5
Single-Ended Antenna Interface ............................................................................................... 38
Dipole Antenna Interface ........................................................................................................... 39
8.
QFN28 Package Information .................................................................................................. 40
8.1. Package Outline QFN28 ............................................................................................................. 40
8.2. QFN28 Soldering Profile ............................................................................................................... 41
8.3. QFN28 Recommended Pad Layout ......................................................................................... 42
8.4. Assembly Process ......................................................................................................................... 42
Stencil Design & Solder Paste Application ............................................................................... 42
9.
Life Support Applications ........................................................................................................ 44
10. Contact Information ................................................................................................................ 45
Version 2.2
Datasheet AX5042
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