TDA5240 Datasheet, PDF (32/284 Pages) Infineon Technologies AG – Enhanced Sensitivity Multi-Channel Quad-Configuration Receiver

TDA5240
Functional Description
When AGC is activated, RSSI is untrimmed, IFATT <= 5.6dB and the same RSSI offset
should be applied for all bandpass filter settings, then the settings in Table 2 can be
applied, where a small reduction of the RSSI input range can be observed.
Table 2
AGC Settings 1
AGC Threshold Hysteresis = 21.3 dB
AGC Digital RSSI Gain Correction = 15.5 dB
BPF
RSSI Offset
AGC
AGC
AGC
Compensation Threshold Threshold Threshold
(untrimmed) ¹⁾ Offset
Low
Up
300 kHz
32
63.9 dB
8
4
200 kHz
32
63.9 dB
6
2
125 kHz
32
63.9 dB
5
0
80 kHz
32
51.1 dB
11
6
50 kHz
32
51.1 dB
9
5
1) Note: This value needs to be used for calculating the register value
RSSI Input
Range
Reduction
5 dB
5 dB
5 dB
2.8 dB
0 dB
For the full RSSI input range, the values in Table 3 can be applied.
Table 3
AGC Settings 2
AGC Threshold Hysteresis = 21.3 dB
AGC Digital RSSI Gain Correction = 15.5 dB
BPF
RSSI Offset
AGC
AGC
AGC
Compensation Threshold Threshold Threshold
(untrimmed) ¹⁾ Offset
Low
Up
300 kHz
-18
63.9 dB
5
1
200 kHz
-18
51.1 dB
11
7
125 kHz
-18
51.1 dB
10
5
80 kHz
4
51.1 dB
9
5
50 kHz
32
51.1 dB
9
5
1) Note: This value needs to be used for calculating the register value
Data Sheet
32
V4.0, 2010-02-19