# TDA5235 study
- [time=Feb 19, 2022 12:29 PM]
- [color=#69e0e0] [name=Jim Huang ]
- [TOC]
###### tags: `Infineon`
## Overview
- Infineon
- Low power ASK/FSK Receiver
- Frequency bands 300-320, 425-450,863-870 and 902-928 MHz.
- Voltage : 3.0~3.6 V，4.5~5.5 V.
- Integrated 4-wire SPI interface bus
- Operating temperature range -40 to +105°C
- PG-TSSOP-28

### main blocks:
• RF / IF Receiver
• Crystal Oscillator and Clock Divider
• Sigma-Delta Fractional-N PLL Synthesizer
• ASK / FSK Demodulator incl. AFC, AGC and ADC
• RSSI Peak Detector
• Digital Baseband Receiver
• Power Supply Circuitry
• System Interface
• System Management Unit
- Pin Configuration
### Functional Block Description
### Register Description

## Others
### ASK/FSK study :