TDA7528 STMicroelectronics, TDA7528 Datasheet - Page 19

• 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

TDA7528
Table 8.
Symbol
Lthr
-
-
-
-
-
-
-
Figure 5.
5.
All other possible bit combinations of data byte FMAGC[3:0] are not recommended.
The voltage output can be configured as GPO.
The FMAGC2 output (voltage output) is short-circuit protected by a current limiter. The
FMAGC1 output (current output) needs an external resistor for current limitation. The
current output is voltage-tolerant up to V
The microcontroller can read the voltage at the AGC capacitor via the serial control
interface. On request of the microcontroller the measurement is done by applying the time
constant capacitor voltage to the central ADC (specified in chapter 3.10) and gives
information to calculate the AGC-attenuation.
The FM AGC system is controlled by a peak detector.
The Key AGC function is controlled by a D/A converter in the backend.
FM-AGC electrical characteristics
Threshold RF level
Min. Threshold
Max Threshold
Threshold steps
Threshold error
Total threshold error
Temperature behavior of AGC
thresholds
Frequency range
Pin diode source current
(I ≈−1.5 mA * (exp(V
V
Pin diode sink current
(I ≈ 1 mA * (exp(V
1.65V)-1))
AGCTC
Calibration mode
data byte FMAGC[3:0] = 0010
calibration mode for voltage output: The voltage Vthr can be switched directly to the
voltage output pin.
)-1))
Parameter
FM AGC - Controlled Voltage / current output
AGCTC
DD
-
-
Referred to mixer input
Mode 1 - high gain mixer
Mode 2 – low gain mixer
Mode 1 - high gain mixer
Mode 2 – low gain mixer
4 bit control
30 to170 MHz @ 25 °C
30.0 to 170.0 MHz
-
-
V
(due to exponential behavior,
external resistor needed)
V
(due to exponential behavior,
external resistor needed)
AGCTC
AGCTC
Doc ID 13141 Rev 6
Test condition
< 1V
= V
Iout
Iout
Iout
DD
CC
, the voltage output up to V
Vthr
Vthr
Vout
Vout
Vout
Vthr
Vthr
Vthr
Min.
-1.5
0.5
30
-3
3
-
-
-
-
-
-
-
Electrical characteristics
0.011
Typ
100
106
86
92
1
-
-
-
-
-
-
DD
.
Max
170
1.5
1,5
-10
3
-
-
-
-
-
-
-
dB/°C
Units
dBμV
MHz
mA
mA
dB
dB
dB
19/65
-