TDA5204E1 Infineon Technologies, TDA5204E1 Datasheet - Page 22

• Manufacturer Part Number: TDA5204E1
• Description: ASK Single Conversion Receiver 390MHz
• Manufacturer: Infineon Technologies

Wireless Components
Figure 4-2
The value of the capacitor defines the response time of the AGC. For a stable
control loop the capacitor value should be at least 47nF.
The AGC can be disabled by tying the THRES-pin either to GND or to VCC as
show here:
LNA high gain:
LNA low gain:
In these cases capacitor and voltage divider are not necessary.
2.5
1.5
0.5
3
2
1
0
-120
-110
RSSI Level an Permissive AGC Threhold Level
-100
RSSI Level
4 - 3
- pin 23 (THRES) shorted to VCC
- pin 23 (THRES) shorted to GND
-90
Input Level at LNA Input [dBm]
-80
-70
-60
Specification, January 2001
-50
-40
TDA 5204 E1
Applications
-30
preliminary
RSSI-AGC.wmf