TDA5230XT Infineon Technologies, TDA5230XT Datasheet - Page 77

• Manufacturer Part Number: TDA5230XT
• Manufacturer: Infineon Technologies

Specifications of TDA5230XT

• Operating Temperature (min): -40C
• Operating Temperature (max): 105C
• Operating Temperature Classification: Industrial
• Product Depth (mm): 4.4mm
• Product Length (mm): 9.7mm
• Lead Free Status / Rohs Status: Compliant

Typical
Figure 36
Recommended Digital Trimming Procedure:
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It is only necessary to use either analog or digital trimming. The results between analog
and digital trimming may differ. Therefore the same procedure should always be used.
Data Sheet
Download configuration file (Run Mode Slave, LIMGAIN, LIMOFFS set to minimum)
Switch off RF Path by setting register RFC to 0x1F.
Read RSSI2 eleven times (minimum 10 ms in between readings), use average of last
ten readings (always)
Change LIMOFFS till RSSI2 readings with no input signal are between 0x02 and
0x05 or closest to the upper value
Set register RFC to 0x0z to switch on RF-Path (z stands for the selected value for IF
Attenuation. See
done before trimming of RSSI.).
Change LIMGAIN till RSSI2 readings at -10 dBm are between 0xFC and 0xFE or
closest to the lower value.
The new values for LIMGAIN and LIMOFFS have to be added to the configuration!
250
200
150
100
50
Typical Digital RSSI over Input Signal Power
0
-125 -115 -105 -95
Typical RSSI2 over Input Signal Power
Chapter 2.4.7 RF
Input Signal Pow er [dBm ]
Path. If IF Attenuation is trimmed, this has to be
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73
-75
-65
-55
Functional Description
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Version 4.0, 2007-06-01
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TDA523x