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PDF U2514B Data sheet ( Hoja de datos )
| Número de pieza | U2514B | |
| Descripción | AM/FM Receiver for Digital Tuning with FM-Stereo Decoder | |
| Fabricantes | TEMIC Semiconductors | |
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U2514B
AM/FM Receiver for Digital Tuning with FM-Stereo Decoder
Description
The U2514B is an integrated bipolar radio suitable for
digital tuning systems. It contains a FM front end with
pre-amplifier and FM-stereo decoder as well as a
complete AM receiver and demodulator. Stop-signal
generation is implemented for FM and AM mode. This
circuit is designed for use in small radios, power packs
and multimedia applications
Features
D FM wideband AGC
D LO-buffer for digital tuning
D Integrated stop signal generation with true
AM/ FM discriminators
D Adjustable stop signal sensitivity
D Automatic stereo-mono-blend
D High cut
D Mute function
D Pilot canceller
D Supply voltage range 3 to 12 V
D Package: SSO28
Block Diagram
FMOSCE
FMOSCB
FMRF
653
FMIN
FMAGC
28
2
FM front end
OSCOUT
GNDRF
8
4
AFSM
FMDET
MPXOUT
15 11 25
FM IF +
demodulator
AM FM stop
signal detect
MPXIN
24
Matrix
decoder
+ HCC
Pilot PLL
18
OUTR
19
OUTL
21
LPF
20
CERES
23
CTRLB
1
AMIN
AM front end
AM IF +
demodulator
Control
unit
7 10 12 13
AMOSC
FMIFIN
IFOUT
AMIFIN
17
9 22
26
METER
CTRLA AMFM
AMSADJ
Figure 1.
V Ref
14
VREF
27
VS
GND
16
12305
TELEFUNKEN Semiconductors
Rev. A2, 04-Nov-96
Preliminary Information
1 (15)
1 page  
AMIFIN
3.3 k
13
AMIFIN
VREF
12421
Figure 10.
FMDET
U2514B
VREF
150 mA
Figure 12.
15
FMDET
12422
WThe input impedance of the AM IF amplifier is 3.3 k
according to the required impedance of most ceramic
filters. The input refers to VREF (Pin 14).
The discriminator allows the connection of a ceramic
resonator or LC tank. A minimization of THD and
adjustment of center frequency versus temperature can
only be achieved by using a LC tank. This performs a
temperature independent stop signal.
FMIFIN
AFSM
25 MPXOUT
11 AFSM
40 mA
12
FMIFIN
100 k
12423
GND
Figure 13.
12424
Figure 11.
WThe input impedance of the FM IF amplifier is 330
according to the required impedance of most FM ceramic
filters. The input referes to GND (Pin 16).
A capacitor is connected between AFSM (Pin 11) and
GND for smoothing of the FM-AF. This is necessary to
generate a modulation independent stop signal. (Because
the deviation of the FM signal (75 kHz) can be greater
than the stop signal window (25 kHz)). In the
AM-search-mode, the external capacitor smoothes the
demodulated AM-IF-signal.
TELEFUNKEN Semiconductors
Rev. A2, 04-Nov-96
Preliminary Information
5 (15)
5 Page 
U2514B
Parameters
MPXOUT
Output voltage (AM)
Total distortion
Signal plus noise-to-noise
Sensitivity (AM)
Sensitivity (FM)
MPXIN
Input resistance
Input voltage
OUTL, OUTR
AF output voltage
Output current
Muting attenuation
Channel separation
Pilot signal suppression
CERES
PLL oscillator frequency
FMRF
DC-current
Voltage gain preamplifier
AGC threshold
IFOUT
DC-current
Conversion gain
FMIFIN
Input resistance
Test Conditions / Pins Symbol Min. Typ. Max. Unit
See AM test circuit
WfRF =1 MHz, m = 0.3,fmod = 1 kHz, Rgen = 25 k , VCTRLA = 1.7 V,
VRF
VRF
VRF
=
=
=
20 dBmV
40 dBmV
100 dBmV
VMPXOUT
35
54
66
VRF = 100 dBmV
d
0.7
VRF
VRF
=
=
40 dBmV
100 dBmV
(S+N)/N
27
47
(S+N)/N = 26 dB
38
f0 = 98 MHz,
deviation = ±75 kHz,
without de-emphasis
(S+N)/N = 26 dB
4
Pin 25
mVrms
mVrms
mVrms
%
dB
dB
dBmV
mV
Pin 24
Df = ±75 kHz,
fmod = 1 kHz,
VFMIN = 1 mV,
fFMIN = 97 MHz
Pin 18/19
Df = ±75 kHz,
fmod
Pilot
=1
Df
kHz,
= ±6.7
kHz
VFMIN = 1 mV,
fFMIN = 97 MHz
Pin 20
RMPXIN
VMPXIN
VOUT
IaoaMut
a19kHz
fCERES
10 kW
900 mVpp
110 mVrms
15 mA
40 dB
26 dB
28 dB
456 kHz
Pin 3
See FM test circuit
20 log (vFMRF/v0)
3 dB compression at Pin 3
Pin 10
20 log (vIFOUT/vFMRF)
Pin 12
IFMRF
gFMRF
v0AGC
IIFOUT
gc
rFMIFIN
1
16
5
0.4
20
330
mA
dB
mV
mA
dB
W
TELEFUNKEN Semiconductors
Rev. A2, 04-Nov-96
Preliminary Information
11 (15)
11 Page | ||
| Páginas | Total 15 Páginas | |
| PDF Descargar | [ Datasheet U2514B.PDF ] | |
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