DATASHEET
AX50424
Version 1.3
2
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Document
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Type
Status
Version
Datasheet
Version 1.3
AX50424
Version 1.3
Datasheet AX50424
Table of Contents
3
Table of Contents
1.
Overview .................................................................................................................................... 6
1.1. Features ........................................................................................................................................... 6
1.2. Applications .................................................................................................................................... 6
2.
3.
Block Diagram ........................................................................................................................... 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 ............................................................................................................................................... 11
4.3. AC Characteristics ....................................................................................................................... 12
Crystal Oscillator ........................................................................................................................... 12
RF Frequency Generation Subsystem (Synthesizer) ................................................................ 13
Receiver ......................................................................................................................................... 14
SPI Timing........................................................................................................................................ 16
5.
Circuit Description ................................................................................................................... 17
5.1. Voltage Regulator ....................................................................................................................... 18
5.2. Crystal Oscillator........................................................................................................................... 18
5.3. SYSCLK Output.............................................................................................................................. 19
5.4. Power-on-reset (POR) and RESET_N Input ................................................................................ 19
5.5. RF Frequency Generation Subsystem....................................................................................... 19
VCO ................................................................................................................................................ 20
VCO Auto-Ranging ...................................................................................................................... 20
Loop Filter and Charge Pump .................................................................................................... 20
Registers ......................................................................................................................................... 20
Version 1.3
Datasheet AX50424
4
Table of Contents
5.6. RF Input Stage (ANTP/ANTN) ...................................................................................................... 21
LNA.................................................................................................................................................. 21
I/Q Mixer......................................................................................................................................... 21
5.7. Analog IF Filter .............................................................................................................................. 21
5.8. Digital IF Channel Filter and Demodulator............................................................................... 21
Registers ......................................................................................................................................... 22
5.9. Decoder ........................................................................................................................................ 22
5.10.
Framing and FIFO ................................................................................................................... 23
RAW Mode..................................................................................................................................... 23
RAW Mode with Preamble Match............................................................................................. 23
5.11.
5.12.
5.13.
5.14.
RX AGC and RSSI .................................................................................................................... 24
Automatic Frequency Control (AFC) .................................................................................. 24
PWRMODE Register ................................................................................................................ 25
Serial Peripheral Interface (SPI) ............................................................................................ 26
SPI Timing........................................................................................................................................ 26
6.
Register Bank Description ....................................................................................................... 27
6.1. Control Register Map................................................................................................................... 28
7.
Application Information.......................................................................................................... 32
7.1. Typical Application Diagram ..................................................................................................... 32
7.2. Antenna Interface Circuitry........................................................................................................ 33
Single-Ended Antenna Interface ............................................................................................... 33
Folded Dipole Antenna Interface.............................................................................................. 34
7.3. Voltage Regulator ....................................................................................................................... 34
8.
QFN28 Package Information .................................................................................................. 35
8.1. Package Outline QFN28 ............................................................................................................. 35
8.2. QFN28 Soldering Profile ............................................................................................................... 36
8.3. QFN28 Recommended Pad Layout ......................................................................................... 37
8.4. Assembly Process ......................................................................................................................... 37
Version 1.3
Datasheet AX50424
Table of Contents
5
Stencil Design & Solder Paste Application ............................................................................... 37
9.
Life Support Applications ........................................................................................................ 39
10. Contact Information................................................................................................................ 40
Version 1.3
Datasheet AX50424
