E-TDA7406 STMicroelectronics, E-TDA7406 Datasheet - Page 43

• Manufacturer Part Number: E-TDA7406
• Description: Audio DSPs CAR RADIO SIGNAL
• Manufacturer: STMicroelectronics

Specifications of E-TDA7406

• Operating Temperature Range: - 40 C to + 85 C
• Mounting Style: SMD/SMT
• Package / Case: TQFP-44
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

TDA7406
11
Quality detector
The TDA7406 offers a quality detector output which gives a voltage representing the FM-
reception conditions. To calculate this voltage the MPX-noise and the multipath-detector
output are summed according to the following formula:
The noise-signal is the PEAK-signal without additional influences (see noiseblanker
description). The factor 'a' can by programmed from 0.7 to 1.15. The output is a low
impedance output able to drive external circuitry as well as simply fed to an AD-converter for
RDS applications.
V
Qual
= 1.6 (V
Noise
-0.8 V)+ a (REF5V-V
Mpout
).
Quality detector
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