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TDA7528 Datasheet

FM/AM car-radio receiver front-end

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TDA7528
FM/AM car-radio receiver front-end for IF-sampling systems
with fully integrated VCO
Features
High-performance AM/FM front-end chip for IF-
sampling car-radio tuners
Compatible with AM(LW, MW, SW) / FM(EU,
US, JAPAN, OIRT) / Weather Band / HD-Radio
/ DRM applications
Ready for multi-tuner applications (phase
diversity, background tuner)
Dual input FM-mixer with high image rejection,
specialized for different front-end circuits
Integrated AM preamplifier and tank for lower-
cost applications
Fully integrated tuning PLL with two VCO's for
diversity systems
World tuning capable
Integrated IF tank
AGC controlled IF amplifier with four inputs for
connection of up to four ceramic filters
Fully electronically adjustable
I2C/SPI controlled
Description
The TDA7528 is a front-end module for use in car
radio receivers with digital IF processing, using
the STA3004, respectively the STA3005 backend
IC.
LQFP64
Its field of use includes all the current radio
broadcast services in the range of 50kHz to
163MHz for AM radio, FM radio and US weather
band. Digital standards such as DRM and HD
radio can also be handled. A single
supterheterodyne architecture with 10.7 MHz IF-
frequency provides high dynamic range.
The IMR mixer has separate input and output
stages for AM frequency bands up to 30 MHz and
for FM frequencies above 30 MHz.
The integrated AM-preamplifier and the fully
integrated low-pass filter enable low cost
applications. Two FM inputs with different noise /
IP3 parameter, provide full flexibility for the pre-
stage circuitry. Each mixer output is able to drive
two IF-filters, which can be selected by the
different IF-amplifier inputs.
The fast tuning PLL controls two different VCO,
which are designed to operate without frequency
overlap.
Table 1. Device summary
Order code
Package
TDA7528
LQFP64 exposed pad (10x10x1.4 mm)
Packing
Tray
September 2013
Doc ID 13141 Rev 7
1/65
www.st.com
1


STMicroelectronics Electronic Components Datasheet

TDA7528 Datasheet

FM/AM car-radio receiver front-end

No Preview Available !

Contents
Contents
TDA7528
1 Product description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
1.1 Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
1.2 Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2 Pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.1 Pin connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.2 Pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
3.1 Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
3.2 General parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
3.3 Power management and voltage regulator . . . . . . . . . . . . . . . . . . . . . . . . 14
3.3.1 Power management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
3.3.2
3.3.3
Power-on circuit and low supply voltage detector . . . . . . . . . . . . . . . . . 14
Voltage regulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
3.4 FM - Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
3.4.1
3.4.2
IMR and active balun . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
FM AGC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
3.5 AM - Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
3.5.1
3.5.2
AM LNA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Switchable LPF 4th order . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
3.5.3
3.5.4
IMR and active balun . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
AM AGC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
3.6 IF - Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
3.6.1 IF-Amplifier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
3.6.2 IF-AGC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
3.6.3 IF buffer amplifier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
3.7 Phase Locked Loop . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
3.7.1
3.7.2
3.7.3
VCO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Reference oscillator / reference frequency input buffer . . . . . . . . . . . . . 32
Divider . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
3.7.4 Phase frequency detector and charge pump . . . . . . . . . . . . . . . . . . . . . 33
3.8 Temperature sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
2/65 Doc ID 13141 Rev 7


Part Number TDA7528
Description FM/AM car-radio receiver front-end
Maker STMicroelectronics
Total Page 30 Pages
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