TEA5764UK-G NXP Semiconductors, TEA5764UK-G Datasheet - Page 9

• Manufacturer Part Number: TEA5764UK-G
• Description: Tuners FM RADIO WITH RDS
• Manufacturer: NXP Semiconductors

Specifications of TEA5764UK-G

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: TEA5764UK/N2,027

Philips Semiconductors
TEA5764UK_2
Product data sheet
8.10 FM demodulator
8.11 IF counter
8.6 Band limits
8.7 RF AGC
8.8 Local or long distance receive
8.9 IF filter
The PLL is triggered by writing to any one of the bytes FRQSETMSB, FRQSETLSB,
TNCTRL1, TNCTRL2, TESTBITS, TESTMODE.
Accurate validation of the PLL locking on the new frequency can take 2 ms to 10 ms.
When a lock is detected, bit LD is set.
The TEA5764UK can be switched either to the Japanese FM band or to the US/Europe
FM band. Setting bit BLIM to logic 0 the band range is 87.5 MHz to 108 MHz; setting bit
BLIM to logic 1 selects the Japanese band range of 76 MHz to 90 MHz.
The RF AGC (or wideband AGC) prevents overloading and limits the amount of
intermodulation products created by strong adjacent channels. The RF AGC is on by
default and can be turned off via the I
The TEA5764UK also has an in-band AGC to prevent overloading by the wanted channel.
The in-band AGC is always turned on.
If bit LDX = 1, the LNA gain is reduced by 6 dB to prevent distortion when a transmitter is
very near. If bit LDX = 0, the LNA gain is normal to receive long distance (DX) stations.
A fully integrated IF filter is built-in.
The FM quadrature demodulator has an integrated resonator to perform the phase shift of
the IF signal.
The received signal is mixed to produce an IF of 225 kHz. The result of the mixing is
counted. A good IF count result indicates that the radio is tuned to a valid channel instead
of an image or a channel with much interference. The IF counter outputs a 7-bit count
result via the I
via the I
valid result window; see
Before a tuning cycle is initiated the IF count period can be set to 2 ms or to 15.6 ms by
bit IFCTC. When the IF count period is set to 2 ms, initiating the tuning algorithm with a
preset (bit SM = 0) will always give an RDS update as shown in
the IF count time is set to 15.6 ms, the tuning flowchart illustrated in
Once tuned, the IF count period is always 15.6 ms.
2
C-bus. It also activates a flag when the IF count result is outside the IF count
2
C-bus. The IF counter is continuously active and can be read at any time
Rev. 02 — 9 August 2005
Section
9.1.4.4.
2
C-bus.
© Koninklijke Philips Electronics N.V. 2005. All rights reserved.
TEA5764UK
Section
Figure 3
8.22.1. In case
FM radio + RDS
is used.
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