tea5767hn NXP Semiconductors, tea5767hn Datasheet - Page 6

• Manufacturer Part Number: tea5767hn
• Description: Low-power Fm Stereo Radio For Handheld Applications
• Manufacturer: NXP Semiconductors

NXP Semiconductors
7. Functional description
TEA5767HN_5
Product data sheet
7.1 Low-noise RF amplifier
7.2 FM mixer
7.3 VCO
Table 3.
The Low Noise Amplifier (LNA) input impedance together with the LC RF input circuit
defines an FM band filter. The gain of the LNA is controlled by the RF AGC circuit.
The FM quadrature mixer converts the FM RF (76 MHz to 108 MHz) to an IF of 225 kHz.
The varactor tuned LC VCO provides the Local Oscillator (LO) signal for the FM
quadrature mixer. The VCO frequency range is 150 MHz to 217 MHz.
Symbol
XTAL2
PHASEFIL
PILFIL
n.c.
n.c.
V
V
TMUTE
MPXO
V
TIFC
LIMDEC1
LIMDEC2
n.c.
n.c.
I
AGND
V
RFI1
RFGND
RFI2
TAGC
LOOPSW
n.c.
gain
AFL
AFR
ref
CCA
Pin description
Pin
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
Rev. 05 — 26 January 2007
…continued
Description
crystal oscillator input 2
phase detector loop filter
pilot detector low-pass filter
not connected
not connected
left audio frequency output voltage
right audio frequency output voltage
time constant for soft mute
FM demodulator MPX signal output
reference voltage
time constant for IF center adjust
decoupling IF limiter 1
decoupling IF limiter 2
not connected
not connected
gain control current for IF filter
analog ground
analog supply voltage
RF input 1
RF ground
RF input 2
time constant RF AGC
switch output of synthesizer PLL loop filter
not connected
Low-power FM stereo radio for handheld applications
TEA5767HN
© NXP B.V. 2007. All rights reserved.
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