tda8745.pdf

(278 KB) Pobierz
214514457 UNPDF
INTEGRATED CIRCUITS
DATA SHEET
TDA8745
Satellite sound receiver with
I 2 C-bus control
Preliminary specication
Supersedes data of 1995 Mar 08
File under Integrated Circuits, IC02
1996 Mar 11
214514457.030.png
Philips Semiconductors
Preliminary specication
Satellite sound receiver with I 2 C-bus control
TDA8745
FEATURES
·
On-chip frequency synthesizer and mixer:
– tuning range 4 to 9.77 MHz
– reference oscillator 4 MHz (using a crystal or 4 MHz
frequency source)
·
IF input switches allowing selection of various IF
bandwidths (wide or narrow)
APPLICATIONS
·
Demodulation of two audio signals by wide band
Phase-Locked Loops (PLLs)
·
Satellite receivers
·
TV sets
·
Audio level control after PLL (modulation depth setting)
·
Video recorders.
·
Noise Reduction (NR) bypass for use with main audio
signals
GENERAL DESCRIPTION
·
Left, right and mono output [ 1
¤ 2 (l + r)] on SCART level
The TDA8745 is the successor of the TDA8740 and
TDA8741. The device contains the functionality of the
TDA8740 and TDA8741 together with a synthesizer, mixer
and I 2 C-bus control.
The pin numbers mentioned in this publication refer to the
SDIP42 package; unless otherwise indicated.
·
External audio inputs (for decoder connection)
·
Selectable de-emphasis (DEEM) 50
m
s, 75
m
s, J17 and
flat response
·
I 2 C-bus control of all functions
·
Two selectable addresses
·
Carrier presence detector with automatic mute option.
ORDERING INFORMATION
TYPE
NUMBER
PACKAGE
NAME
DESCRIPTION
VERSION
TDA8745
SDIP42
plastic shrink dual in-line package; 42 leads (600 mil)
SOT270-1
TDA8745H
QFP44
plastic quad at package; 44 leads (lead length 1.3 mm);
body 10 ´ 10 ´ 1.75 mm
SOT307-2
1996 Mar 11
2
214514457.031.png 214514457.032.png 214514457.033.png 214514457.001.png 214514457.002.png
 
Philips Semiconductors
Preliminary specication
Satellite sound receiver with I 2 C-bus control
TDA8745
QUICK REFERENCE DATA
SYMBOL
PARAMETER
CONDITIONS
MIN. TYP. MAX. UNIT
V P1
synthesizer and mixer supply voltage
4.5
5.0
5.5
V
V P2
I 2 C-bus supply voltage
4.5
5.0
5.5
V
V P3
general supply voltage
8.0
12.0 13.2 V
I P1
synthesizer and mixer supply current
-
37
48
mA
I P2
I 2 C-bus supply current
-
0.6
-
mA
I P3
general supply current
-
35
46
mA
S/N(A)
signal-to-noise ratio secondary channel
A-weighted;
NR = on; DEEM = 75
68
77
-
dB
m
s
V i(rms)
input sensitivity (RMS value) baseband input
to mixer
S/N(A) = 40 dB;
NR = on; DEEM = 75
-
0.5
1.5
mV
m
s
V i(rms)
baseband input voltage (RMS value)
THD
£
0.5%
200
mV
V o
output voltage
- 8
- 6
- 4
dBV
P tot
total power dissipation
-
610
800
mW
T stg
storage temperature
-
65
-
+150
°
C
T amb
operating ambient temperature
-
20
-
+70
°
C
1996 Mar 11
3
214514457.003.png
12 V
5 V
100
m
H
4.7
W
5 V
PRES DET L
100
m
F
22
nF
22
nF
22
nF
1000
m
F
2.2
m
470
k
1
m
10
m
10
m
F
1
m
4.7
nF
10
nF
220 nF
F
W
F
F
F
SYNGND
V P1
ADD sel
SDA
SCL
I CGND
V P2
V ref
HFGND
AFGND
V P3
C DC L
RECT L
C ATT/REC L
C NR D L
C D L
C CL L
EXT L
6
12
18
17
14
16
19
10
32
20
41
42
37
38
36
35
34
33
25
I C
INTERFACE
2
PDL
PDR
V ref
PDL
PRESENCE
DETECTOR
OML
DC
23
XTAL
40
DE-EMPHASIS
50
O L
CRYSTAL
OSCILLATOR
HF
LIMITER
AUDIO
LPF
NOISE
REDUCTION
PLL
10
pF
flat
m
s
4 MHz
J17 75
m
s
TUN9 to TUN0
12 to 3dB
200
4 MHz
OML
21
CHARGE
PUMP
j
IL2 to IL0
N
BB
LEV3 to LEV0
TDA8745
NR
DEM1 and DEM0
OS1 and OS0
O M
OMR
SLF
2
VCO
frequency
synthesizer
30 to 40 MHz
12 to 3dB
6.8
k
33
nF
DE-EMPHASIS
50
W
HF
LIMITER
PLL
AUDIO
LPF
NOISE
REDUCTION
flat
m
s
22
J17
75
m
s
O R
B PF N
2
1
m
F
DC
PE
27 pF
27 pF
IR2 to IR0
PDR
PRESENCE
DETECTOR
OMR
BASEBAND
IN
3
PRE-BPF
IL2
47
m
H
1 k
W
MIXER
(1)
IR2
15 pF
27 pF
5
9
11 13 15 7 8
39
1
27
26
28
29
30
31
24
IF OUT
C DC R
RECT R
C ATT/REC R
C NR D R
C D R
C CL L
EXT
R
MBE037
10 nF
10.7
NARROW
(2)
470
k
1
m
10
m
10
m
F
1
m
4.7
nF
10
nF
220 nF
W
F
F
F
330
W
330
W
10.52
NARROW
(2)
PRES DET R
330
W
330
W
10.7
WIDE
(2)
330
W
330
W
When driving more than three filters in parallel, pin 5 should be buffered.
(1) Add 15 pF for NTSC.
(2) Ceramic filters:
SFE10.7MJA10-A (narrow)
SFE10.52MJA10-A (narrow)
SFE10.7MS2-A (wide).
Fig.1 Block diagram (SDIP42).
2
4
214514457.004.png 214514457.005.png 214514457.006.png 214514457.007.png 214514457.008.png 214514457.009.png 214514457.010.png 214514457.011.png 214514457.012.png 214514457.013.png 214514457.014.png 214514457.015.png 214514457.016.png 214514457.017.png 214514457.018.png 214514457.019.png 214514457.020.png 214514457.021.png 214514457.022.png 214514457.023.png 214514457.024.png 214514457.025.png 214514457.026.png 214514457.027.png
Philips Semiconductors
Preliminary specication
Satellite sound receiver with I 2 C-bus control
TDA8745
PINNING
PIN
SYMBOL
DESCRIPTION
SDIP42
QFP44
C DC R
1
39
DC decoupling capacitor (right channel)
SLF
2
41
synthesizer loop-lter
BASEBAND IN
3
42
baseband input to mixer
V P1
4
43
synthesizer and mixer supply voltage (+5 V)
IF OUT
5
44
intercarrier output from mixer
SYNGND
6
1
synthesizer and mixer ground
IN-5
7
2
intercarrier input 5/port expansion output 1
IN-6
8
3
intercarrier input 6/port expansion output 2
IN-1
9
4
Intercarrier input 1
HFGND
10
5
HF ground
IN-2
11
6
intercarrier input 2
ADD sel
12
7
I 2 C-bus address selection
IN-3
13
8
Intercarrier input 3
I 2 CGND
14
9
I 2 C-bus ground
IN-4
15
10
intercarrier input 4
V P2
16
11
I 2 C-bus supply voltage (+5 V)
SCL
17
12
I 2 C-bus serial clock input
SDA
18
13
I 2 C-bus serial data input/output
V ref
19
14
decoupling capacitor for reference voltage
V P3
20
15
general supply voltage (+12 V)
O M
21
17
mono channel output [ 1
¤ 2 (l + r)]
O R
22
18
right channel output
O L
23
19
left channel output
EXT R
24
20
external audio input (right channel)
EXT L
25
21
external audio input (left channel)
C ATT/REC R
26
22
attack/recovery capacitor (right channel)
RECT R
27
23
rectier DC decoupling (right channel)
C NRD R
28
24
noise reduction de-emphasis capacitor (right channel)
C DR
29
25
de-emphasis capacitor (right channel)
DEEM OUT R
30
26
de-emphasis output (right channel)
C CL R
31
27
audio pass-through input (right channel)
AFGND
32
28
AF ground
C CL L
33
29
audio pass-through input (left channel)
DEEM OUT L
34
30
de-emphasis output (left channel)
C DL
35
31
de-emphasis capacitor (left channel)
C NRD L
36
32
noise reduction de-emphasis capacitor (left channel)
RECT L
37
33
rectier DC decoupling (left channel)
C ATT/REC L
38
34
attack/recovery capacitor (left channel)
1996 Mar 11
5
214514457.028.png 214514457.029.png

Plik z chomika:

Inne pliki z tego folderu:

Inne foldery tego chomika:

Zgłoś jeśli naruszono regulamin