TDA7528 STMicroelectronics, TDA7528 Datasheet - Page 24

• Manufacturer Part Number: TDA7528
• Description: IC FRONT END MODULE CAR 64-LQFP
• Manufacturer: STMicroelectronics

Specifications of TDA7528

• Frequency: 50kHz ~ 108MHz, 161MHz ~ 163MHz
• Modulation Or Protocol: AM, FM
• Applications: Automotive Audio
• Current - Receiving: 175mA
• Data Interface: PCB, Surface Mount
• Voltage - Supply: 3.3V, 5V
• Operating Temperature: -40°C ~ 105°C
• Package / Case: 64-LQFP
• Operating Temperature (min): -40C
• Operating Temperature (max): 125C
• Operating Temperature Classification: Automotive
• Package Type: LQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Features: -
• Sensitivity: -
• Memory Size: -
• Data Rate - Maximum: -
• Antenna Connector: -
• Lead Free Status / Rohs Status: Compliant

Electrical characteristics
3.5.4
24/65
AM AGC
The time constant of the AM AGC is defined by an external capacitor and the programmable
internal currents (details given in the
Control behavior:
The AM RF AGC is realized with two output pins which controls the gain of the
corresponding pre-stage.
The control behavior can be programmed to the following modes:
1.
Figure 6.
2.
3.
Figure 7.
Controlled current output mode 1
data byte AMAGC[3:0] = 1000
positive current I = f(e): after reaching the AGC threshold voltage the current output
delivers a current I = f(e) up to 15 mA in a voltage range from 0.1 V up to V
Constant current mode
data byte AMAGC[3:0] = 0100
constant current mode: the output current can be set to 2 mA source current. The AGC
detector is in power-down mode and only the pin diode driver is active.
Voltage and current mode with hand-over
a)
b)
internal feedback
data byte AMAGC[3:0] = 1001
voltage and current mode with hand-over: the Vthr level is programmable in the
range 1 V to 2.6 V.
This mode can be used in combination with both the internal and the external
LNA. In combination with the internal AM LNA, the maximum output voltage is
limited to 2.7 V.
external feedback
data byte AMAGC[3:0] = 1011
Voltage and current mode with hand-over: the Vthr level is programmable in the
range 0.2 to 2.6 V. The voltage Vthr is the internal reference voltage for the
AM AGC - Controlled current output mode 1
AM AGC - Voltage and current mode with hand-over
15mA
15mA
15mA
Iout
Iout
Iout
Doc ID 13141 Rev 6
f(e) current
f(e) current
f(e) current
Table
Iout
Iout
Vthr
Vthr
12).
Vout
Vout
V_TCAGCAM
V_TCAGCAM
Vthr
Vthr
CC
TDA7528
-1.5 V.