TEF6901AH/V2,518 NXP Semiconductors, TEF6901AH/V2,518 Datasheet - Page 9

• Manufacturer Part Number: TEF6901AH/V2,518
• Description: IC INTEGRATED CAR RADIO 64-QFP
• Manufacturer: NXP Semiconductors

Specifications of TEF6901AH/V2,518

• Modulation Or Protocol: AM, FM, WB
• Applications: AM/FM Radio Receiver
• Current - Receiving: 102mA
• Data Interface: PCB, Surface Mount
• Antenna Connector: PCB, Surface Mount
• Voltage - Supply: 8 V ~ 9 V
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 64-QFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Features: -
• Frequency: -
• Sensitivity: -
• Memory Size: -
• Data Rate - Maximum: -
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant
• Other names: 935281178518; TEF6901AH/V2-T; TEF6901AH/V2-T

NXP Semiconductors
TEF6901A_3
Product data sheet
7.12 Antenna DAA
7.13 AM RF AGC control
7.14 AM mixer 1
7.15 AM IF noise blanker
7.16 AM IF AGC amplifier and demodulator
7.17 AM level detection
7.18 AM and FM level DAA
7.19 AM and FM IF counter
7.20 Tuning mute
For FM operation the antenna Digital Auto Alignment (DAA) measures the VCO tuning
voltage and multiplies it with a factor defined by the 7-bit DAA setting to generate a tuning
voltage for the FM antenna tank circuit (RF selectivity). In AM mode the DAA setting
controls a fixed voltage.
The AM front-end is designed for the application of an external Junction Field Effect
Transistor (JFET) low noise amplifier with cascode AGC and PIN diode AGC both
controlled by an integrated AGC control circuit. Four AGC thresholds of the detector at the
first mixer input are selectable via I
AMIF2 input prevent undesired overload (see
out via I
reverse biasing of the PIN diode, when the AGC is not active to achieve a low parasitic
capacitance.
The large dynamic range AM mixer converts AM RF (144 kHz to 26.1 MHz) to an IF
frequency of 10.7 MHz.
The spike detection for the AM IF noise blanker is at the output of the AM front-end mixer.
Blanking is realized at the second AM mixer.
The 450 kHz IF2 signal after the ceramic channel selection filter is amplified by the
IF AGC amplifier and demodulated.
The IF2 signal used for AM IF AGC and demodulation is also used in the limiter circuit for
in-band level detection.
The start and slope of the level detector output are programmable to achieve level
information independent of gain spread in the signal channel.
The output signal from the limiter is used for IF counting in both AM and FM.
A soft slope tuning mute is controlled by the sequential machine for different tuning
actions to eliminate audible effects of tuning and band switching.
2
C-bus. The PIN diode current drive circuit includes a pull-up current source for
Rev. 03 — 20 March 2008
2
C-bus. Detectors at the RF mixer input and at the
Figure
40). AGC information can be read
TEF6901A
Integrated car radio
© NXP B.V. 2008. All rights reserved.
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