Philips Semiconductors
Product specification
Self Tuned Radio (STR)
FEATURES
•
The tuning system has an optimized IC partitioning both
from application (omitting interferences) and flexibility
(removable front panel option) point of view: the tuning
synthesizer is on-chip with the radio
•
The tuning quality is superior and requires no IF-counter
for stop-detection; it is insensitive to ceramic filter
tolerances
•
In combination with the microcontroller, fast, low-power
operation of preset mode, manual-search, auto-search
and auto-store are possible
•
The local (internal) controller function facilitates reduced
and simplified microcontroller software
•
The high integration level means fewer external
components with regard to the communication between
the radio and the microcontroller and a simple and small
Printed-Circuit Board (PCB)
•
The inherent FUZZY LOGIC behaviour of the Self
Tuned Radio (STR), which mimics hand tuning and
yields a potentially fast yet reliable tuning operation
•
The level of the incoming signal at which the radio must
lock is software programmable
•
Two programmable ports
•
FM-on/off port to control the external FM front-end
•
High selectivity with distributed IF gain
•
Soft mute
•
Signal dependent stereo-blend
ORDERING INFORMATION
TYPE
NUMBER
TEA5762H
PACKAGE
NAME
QFP44
DESCRIPTION
plastic quad flat package; 44 leads (lead length 1.3 mm);
body 10
×
10
×
1.75 mm
TEA5762
•
High impedance MOSFET input on AM
•
Wide supply voltage range of 2.5 to 12 V
•
Low current consumption 18 mA at AM and FM
(including tuning synthesizer for AM)
•
Low noise figure
•
Low output distortion
•
Due to the new tuning concept, the tuning is
independent of the channel spacing.
GENERAL DESCRIPTION
The TEA5762 is a 44-pin integrated AM-radio and FM-IF
and demodulator part including a novel tuning concept.
The radio part is based on the TEA5712.
It is designed for the use with an external FM front-end.
The new tuning concept combines the advantages of hand
tuning with electronic facilities and features. User
‘intelligence’ is incorporated into the tuning algorithm and
an improvement of the analog signal processing is used for
the AFC function.
VERSION
SOT307-2
1999 Aug 04
2
Philips Semiconductors
Product specification
Self Tuned Radio (STR)
QUICK REFERENCE DATA
SYMBOL
V
CC1
V
CC2
V
tune
I
CC1
I
DD
I
CC2
T
amb
V
10
V
i1
THD
PARAMETER
supply voltage
supply voltage for tuning
tuning voltage
supply current
supply current
supply current for tuning in preset
mode (band-end to band-end)
ambient temperature
AM mode
FM mode
AM mode
FM mode
CONDITIONS
MIN.
2.5
−
0.7
12
13
−
−
−
−15
V
i1
= 5 mV
S/N = 26 dB
V
i1
= 1 mV
V
i4
= 5 mV
V
10
=
−3
dB; V
10
= 0 dB
at V
i4
= 10 mV
IF filter
SFE10.7MS3A20K-A
36
40
−
40
−
−
TYP.
−
−
−
15
16
3.3
2.7
−
−
45
55
0.8
12
12
TEA5762
MAX.
UNIT
V
V
V
mA
mA
mA
mA
µA
°C
mV
µV
%
V
CC2
−
0.75
18
19
−
−
800
+60
AM performance;
note 1
AF output voltage
RF sensitivity input voltage
total harmonic distortion
70
70
2.0
FM performance;
note 2
V
10
V
i4
THD
AF output voltage
IF sensitivity input voltage
total harmonic distortion
48
20
0.3
57
30
0.8
mV
µV
%
MPX performance;
note 3
α
cs
Notes
1. V
CC1
= 3 V; V
CC2
= 12 V; V
DDD
= 3 V; f
i
= 1 MHz; m = 0.3; f
mod
= 1 kHz; measured in Fig.9 with S1 in position A; S2
in position B; unless otherwise specified.
2. V
CC1
= 3 V; V
CC2
= 12 V; V
DDD
= 3 V; f
i
= 10.7 MHz;
∆f
m
= 22.5 kHz; f
m
= 1 kHz; measured in Fig.9 with S2 in
position A; S3 in position A; unless otherwise specified.
3. V
CC1
= 3 V; V
CC2
= 12 V; V
DDD
= 3 V; V
i3(L + R)
= 155 mV; V
pilot
= 15.5 mV; f
i
= 1 kHz; measured in Fig.9 with S2 in
position B; S3 in position B; unless otherwise specified.
channel separation
V
i4
= 30 mV
26
30
−
dB
1999 Aug 04
3
Philips Semiconductors
Product specification
Self Tuned Radio (STR)
PINNING
SYMBOL
RIPPLE
AM-RFI
RFGND
CGND
COUNTI
AMOSC
V
CC1
TUNE
VCO
AFO
MPXI
LFI
MUTE
AFLO
AFRO
PILFIL
IFGND
FMDEM
AFC
(n)
AFC
(p)
FSI
V
CC2
V
DDD
MO/ST
XTAL
DGND
BUS-CLOCK
DATA
WRITE-ENABLE
P0
P1
AFC
FM-IFI2
V
STAB(B)
FM-IFO1
AM-IFI/O2
FM-IFI1
V
STAB(A)
FM-ON/OFF
AM-MIXER
1999 Aug 04
PIN
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
ripple capacitor input
AMRF input
RF ground and substrate
counter ground
counter input
parallel tuned AM-oscillator circuit to ground
supply voltage
tuning output current
voltage controlled oscillator input
AM/FM AF output (output impedance typical 5 kΩ)
stereo decoder input (input impedance typical 150 kΩ)
loop filter input
mute input
left channel output (output impedance typical 4.3 kΩ)
right channel output (output impedance typical 4.3 kΩ)
pilot detector filter input
ground of IF, detector and MPX stage
ceramic discriminator input
AFC negative output
AFC positive output
field strength indicator
supply voltage for tuning
digital supply voltage
mono/stereo and tuning indication output
crystal input
digital ground
bus-clock input
bus data input/output
bus write-enable input
programmable output port (P0)
programmable output port (P1)
450 kHz LC-input circuit for AM AFC
FMIF input 2 (input impedance typical 330
Ω)
internal stabilized supply voltage (B)
FMIF output 1 (input impedance typical 330
Ω)
input/output to IFT; output: current source
FMIF input 1 (input impedance typical 330
Ω)
internal stabilized supply voltage (A)
FM ON/OFF port
open-collector output to IFT
5
DESCRIPTION
TEA5762
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