tda5225 Infineon Technologies Corporation, tda5225 Datasheet - Page 105

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tda5225

Manufacturer Part Number
tda5225
Description
Enhanced Sensitivity Multi-channel Quad-conf Igurat Ion Receiver With Digital Slicer
Manufacturer
Infineon Technologies Corporation
Datasheet

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
TDA5225
Quantity:
4 800
Company:
Part Number:
TDA5225
Quantity:
4 800
List of Figures
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Data Sheet
Pin-out . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
TDA5225 Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Block Diagram RF Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Single Down Conversion (SDC, no external filters required) . . . . . . . . 19
Double Down Conversion (DDC) with one external filter . . . . . . . . . . . 20
Double Down Conversion (DDC) with two external filters . . . . . . . . . . 20
Crystal Oscillator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
External Clock Generation Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Synthesizer Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Functional Block Diagram ASK/FSK Demodulator . . . . . . . . . . . . . . . 26
AFC Loop Filter (I-PI Filtering and Mapping) . . . . . . . . . . . . . . . . . . . . 28
Analog RSSI output curve with AGC action ON (blue) vs. OFF (black) 29
Peak Detector Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Peak Detector Behavior . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Functional Block Diagram Digital Baseband Receiver. . . . . . . . . . . . . 36
Wake-Up Generation Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
RSSI Blocking Thresholds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
3.3 Volts and 5 Volts Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Supply Current Ramp Up/Down. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Reset Behavior . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Logical and electrical System Interfaces of the TDA5225 . . . . . . . . . . 44
Data interface for the Transparent Mode . . . . . . . . . . . . . . . . . . . . . . . 46
External Data Processing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Interrupt Generation Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Interrupt Generation Waveform (Example for Configuration A+B). . . . 49
ISx Readout Set Clear Collision. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Read Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Burst Read Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Write Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
Burst Write Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
Serial Input Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
Serial Output Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
Chip Serial Number . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
Global State Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
Run Mode Slave . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
HOLD State Behavior (INITPLLHOLD disabled) . . . . . . . . . . . . . . . . . 59
HOLD State Behavior (INITPLLHOLD enabled) . . . . . . . . . . . . . . . . . 60
SPM - TX-RX Interaction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
Wake-up Search with Configuration A . . . . . . . . . . . . . . . . . . . . . . . . . 62
Wake-up Search with Configuration B, C, D . . . . . . . . . . . . . . . . . . . . 63
SPI Checksum Generation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
105
V1.0, 2010-02-19
TDA5225
Page

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