tda5235 Infineon Technologies Corporation, tda5235 Datasheet - Page 161
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tda5235
Manufacturer Part Number
tda5235
Description
Enhanced Sensitivity Double-configuration Receiver With Digital Baseband Processing
Manufacturer
Infineon Technologies Corporation
Datasheet
1.TDA5235.pdf
(259 pages)
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
TDA5235
Manufacturer:
INFINEON/英飞凌
Quantity:
20 000
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List of Figures
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Data Sheet
Pin-out . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
TDA5235 Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Block Diagram RF Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Single Down Conversion (SDC, no external filters required) . . . . . . . . 20
Double Down Conversion (DDC) with one external filter . . . . . . . . . . . 21
Double Down Conversion (DDC) with two external filters . . . . . . . . . . 21
Crystal Oscillator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
External Clock Generation Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Synthesizer Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Functional Block Diagram ASK/FSK Demodulator . . . . . . . . . . . . . . . 27
AFC Loop Filter (I-PI Filtering and Mapping) . . . . . . . . . . . . . . . . . . . . 29
Analog RSSI output curve with AGC action ON (blue) vs. OFF (black) 30
Peak Detector Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Peak Detector Behavior . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Functional Block Diagram Digital Baseband Receiver. . . . . . . . . . . . . 38
Signal Detector Threshold Level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Coding Schemes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Manchester Symbols including Code Violations . . . . . . . . . . . . . . . . . 42
Clock Recovery (ADPLL) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
RUNIN Generation Principle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Definition of Tolerance Windows for the CDR . . . . . . . . . . . . . . . . . . . 46
Data Rate Acceptance Limitation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Wake-Up Generation Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
RSSI Blocking Thresholds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Wake-Up Data Criteria Search . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
Frame Synchronization Unit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
16-Bit TSI Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
8-Bit Parallel TSI Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
8-Bit Extended TSI Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
8-Bit Gap TSI Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
Clock Recovery Gap Resynchronization Mode TSIGRSYN = 1 . . . . . 60
Clock Recovery Gap Resynchronization Mode TSIGRSYN = 0 . . . . . 61
TSIGap TSIB Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
TVWIN and TSIGAP dependency example . . . . . . . . . . . . . . . . . . . . . 62
4-Byte Message ID Scanning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
2-Byte Message ID Scanning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
MID Scanning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
Structure of Payload Frame . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
Data Latency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
3.3 Volts and 5 Volts Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
Supply Current Ramp Up/Down. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
161
V1.0, 2010-02-19
TDA5235
Page
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