U2861B [TEMIC]
Mono FM Sound Demodulator for TV Systems; 单声道调频伴音解调器的电视系统
| 型号： | U2861B |
| 厂家： | 
TEMIC SEMICONDUCTORS |
| 描述： | Mono FM Sound Demodulator for TV Systems |
| 文件： | 总11页 (文件大小：256K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
U2861B
Mono FM Sound Demodulator for TV Systems
Description
The U2861B is an alignment-free FM sound IF demo- switchable audio inputs and volume control. With a
dulator for all TV standards from 4.5 MHz up to 6.5 MHz supply voltage of 5 V, the U2861B is suitable for TV,
(standard M, N, B/G, I, D/K). The circuit includes two VCR and Multimedia applications.
Features
Completely alignment-free
Very few external components
PLL demodulator for FM intercarrier sound IF signals
(mono)
Volume control by DC voltage
Supply voltage: 5 V; low power consumption
Two audio switches
VS
AF1
AF1
AF2
in
in
out
vi,AF1
Cref
6
vo,AF1
12
vi,AF2
VS
1
10
7
Bandgap
reference
VCO
Switch2
Switch1
Sound IF
input
8
vo,AF2
3
5 k
AF2
out
vi,SIF
4
2
5
14
13
11
9
Cdec
Cdem
VSW1
Vvol
Vmute
VSW2
GND
Decoupling FM
De-
Audio
switch1
Audio
switch2
Volume
control
96 11832
mute emphasis
Figure 1. Block diagram
Ordering Information
Extended Type Number
U2861B – M
U2861B – MFPG3
Package
DIP14
SO14
Remarks
taped on reel
TELEFUNKEN Semiconductors
1 (11)
Rev. A1, 20-May-97
Preliminary Information
U2861B
Circuit Description
Sound IF Limiter Amplifier
Audio Switch 1
The intercarrier signal coming from the sound filter is fed
to a 7-stage limiter amplifier. This guarantees high input
sensitivity and excellent AM suppression.
The first audio switch (Pin 13) has inputs for the demodu-
lated FM signal and the external AF1 signal from Pin 1.
For multistandard purposes, it is possible to handle inter-
nal FM and external AM audio signals. The output of
switch1 is also permanently available at Pin 12 (e. g. for
SCART interface).
PLL – FM Demodulator
The alignment-free “Phase-Locked-Loop” (PLL) FM
demodulator covers a wide frequency range of 4.5 MHz
up to 6.5 MHz with excellent noise performance. Due to
the fact that the voltage-to-frequency characteristic is
linear, a low harmonic distortion can be achieved. The
free-running frequency of the internal VCO circuit is
about 5.5 MHz.
Audio Switch 2 and Volume Control
The second audio switch (Pin 11) has inputs for the audio
signal from switch 1 and the external AF2 signal at Pin 10.
The switched AF signal is fed to volume control. The out-
put voltage can be controlled by a DC voltage at Pin 9.
The demodulated FM signal is led via de-emphasis and
buffered to Pin 12. The de-emphasis low pass filter con-
sists of an internal 5-k series resistor and an external
Internal Voltage Stabilizer
capacitor at Pin 14. The FM muting is possible by switch- The internal bandgap reference ensures constant perfor-
ing Pin 5 to ground.
mance independent of supply voltage and temperature.
Pin Description
Pin
1
2
3
4
5
6
7
8
Symbol
Function
Audio input 1 (e.g. AM signal)
Decoupling capacitor
FM sound IF input
Ground
FM mute switch
Internal reference voltage
Supply voltage
Switched audio output 2
Volume control
Audio input 2
(e.g. from SCART)
Audio switch 2
14
v
i,AF1
C
1
2
3
4
5
6
7
v
v
dem
i,AF1
C
dec
v
i,SIF
GND
13
12
11
10
9
C
dec
V
v
SW1
V
mute
o,AF1
i,SIF
C
ref
V
s
U2861B
v
GND
V
o,AF2
SW2
9
10
V
vol
v
i,AF2
v
i,AF2
V
mute
11
12
13
14
Vsw
2
C
ref
V
v
vol
v
Switched audio output 1
Audio switch 1
De-emphasis and mute switch
o,AF1
Vsw
C
1
8
V
S
dem
o,AF2
96 11833
Figure 2. Pinning
2 (11)
TELEFUNKEN Semiconductors
Rev. A1, 20-May-97
Preliminary Information
U2861B
Absolute Maximum Values
Reference point Pin 4, unless otherwise specified
Parameters
Symbol
Value
Unit
Supply voltage
DIP14 package
SO14 package
Pin 7
Pin 7
V
9.0
6.0
V
V
s
Supply current
I
25
mA
s
Power dissipation V = 9 V (DIP14 only)
P
225
150
mW
mW
s
V = 6 V
s
Output currents
Pin 8, 12
I
1.0
+ 4.5
mA
V
out
External voltages
Pin 1, 2, 3, 5, 6, 8, 9, 10, 12, 13, 14
Pin 11
V
ext
+ 12.0
V
Ambient temperature
Junction temperature
Storage temperature
T
–10 to +85
+125
°C
°C
°C
V
amb
T
j
T
–25 to +125
+/– 200 V
stg
Electrostatic handling *) all pins
V
ESD
*) equivalent to discharge a 200-pF capacitor through a 0- resistor
Thermal Resistance
Parameters
Symbol
Value
Unit
Junction ambient when soldered to PCB
DIP14 package
SO14 package
R
thJA
90
140
K/W
K/W
TELEFUNKEN Semiconductors
3 (11)
Rev. A1, 20-May-97
Preliminary Information
U2861B
Electrical Characteristic
V = +5 V, T
= +25°C; reference point Pin 4, unless otherwise specified
s
amb
Parameters
Symbol
Test Condition
Min.
Typ.
Max.
Unit
DC supply: (Pin 7)
Supply voltage
DIP14 package
SO14 package
V
s
4.5
4.5
5.0
5.0
9.0
6.0
V
V
Supply current
I
20
25
mA
s
FM sound IF input: (Pin 3)
Input limiting voltage, RMS value
v
i,SIF
AF output signal at pin 8
and pin12: –3 dB
150
µV
RMS
DC input voltage
Input resistance
V
1.7
600
1.5
V
DC
R
See note 1
See note 1
750
in
in
Input capacitance
FM – PLL:
C
pF
Free–running frequency
f
5.5
MHz
kHz
vco
Oscillator drift (free running)
as function of temperature
f
T = 55°C
500
vco
Oscillator shift (free running)
as function of supply voltage
f
4.5 V < V < V
200
kHz
vco
s
S,max
Capture range of PLL
f
±1.4
±2.0
±1.9
±2.5
MHz
MHz
cap
Holding range of PLL
f
hold
Decoupling capacitor: (Pin 2)
Value of decoupling capacitor
De-emphasis capacitor: (Pin 14)
Value of de-emphasis capacitor
Audio output 2: (Pin 8)
DC output voltage
C
2.2
10
µF
nF
V
dec
C
dem
= 50µs
V
R
2.2
DC
Output resistance
130
out
AC output peak current
DC output current
i
±1.0
mA
mA
AC
I
–1.2
DC
AF output voltage, RMS value
v
v = 10 mV,
in
500
mV
RMS
o,AF2
f = 5.5 MHz,
FM–dev. = 27 kHz,
f
= 1 kHz
mod
Total harmonic distortion
AM suppression
THD
v =10 mV, f = 5.5 MHz,
0.1
60
0.5
%
in
FM–dev. = 27 kHz,
f
= 1 kHz
mod
a
AM
v =10 mV, f = 5.5 MHz,
in
42
dB
f
=1 kHz,
mod
reference signal:
FM–dev. = 27 kHz
test signal: m = 30%
Supply voltage ripple rejection
RR
V
RR
< 200 mV,
30
dB
f = 70 Hz
4 (11)
TELEFUNKEN Semiconductors
Rev. A1, 20-May-97
Preliminary Information
U2861B
Electrical Characteristics
V = +5 V, T
= +25°C; reference point Pin 4, unless otherwise specified
s
amb
Parameters
Symbol
Test Condition
Min.
Typ.
Max.
Unit
Audio input 1: (Pin 1)
Input resistance
R
in
50
k
Internal DC bias voltage
AF1 input signal
V
3.0
V
DC
v
i,AF1
900 mV
RMS
Mode selection audio switch 1: (Pin 13)
Control voltage for:
FM demodulated signal
External signal AF1
V
sw1
See note 2
2.0
0
4.5
0.8
V
V
Switching current
I
70
A
sw1
Audio input 2: (Pin 10)
Input resistance
R
in
50
k
Internal DC bias voltage
AF2 input signal
V
3.0
V
DC
v
i,AF2
900 mV
RMS
Audio output 1: (Pin 12)
DC output voltage
V
2.3
500
130
V
DC
AF output voltage
v
o,AF
mV
RMS
Output resistance
R
out
Mode selection audio switch 2: (Pin 11)
Control voltage for:
External signal AF2
Signal from switch1
Signal from switch1
2.8
V
V
V
V
sw
See note 3
0
4.0
1.5
12.0
Switching current
I
60
A
sw
Volume control: (Pin 9)
AF control range
AF
80
4
dB
Control voltage: minimal volume
maximal volume
V
vol
0
V
V
4.5
Mute switch: (Pin 5)
Control voltage for “mute off”
Control voltage for “mute on”
V
V
AF “on”
AF “off”
2.1
0
2.9
4.5
1.5
V
V
mute
mute
Notes:
7. This parameter is given as an application information and is not tested during production.
8. Without control voltage at Pin 13, the internal FM demodulated
9. Without control voltage at Pin 11, the audio signal from switch1 is automatically selected..
With V11 < 1.5 or V11 > 4.0 V input Pin 10 is selected.
10. Without control voltage at Pin 5, the mute function is not active.
TELEFUNKEN Semiconductors
Rev. A1, 20-May-97
5 (11)
Preliminary Information
U2861B
AF1
AF2
AF2
out
out
in
Volume
control
Switch1
Switch2
µ
µ
µ
1 F
10 nF
14
1 F
1 F
12
11
9
6
8
7
13
10
U2861B
1
2
3
5
4
22 nF
10 nF
µ
µ
µ
1 F
1 F 2.2 F
Ω
50
µ
22 F
SIF
(intercarrier)
FM mute
switch
VS
AF1
in
96 11834
Figure 3. Test circuit
6 (11)
TELEFUNKEN Semiconductors
Rev. A1, 20-May-97
Preliminary Information
U2861B
AF1
AF2
AF2
out
out
in
Volume
control
Switch1
Switch2
µ
1 F
µ
1 F
µ
1 F
10 nF
14
12
11
9
6
8
7
13
10
U2861B
1
2
3
5
4
µ
1 F
AF1
in
µ
µ
2.2 F
2.2 F
22 nF
Ω
680
SIF
(intercarrier)
µ
22 F
FM mute
switch
SFE 5.5 MC
+ 5 V
96 11835
Figure 4. Basic application circuit
TELEFUNKEN Semiconductors
7 (11)
Rev. A1, 20-May-97
Preliminary Information
U2861B
Internal Pin Configuration
6
3.5 V
50 k
1
96 11839
96 11836
Figure 5. Audio input 1 (Pin 1)
Figure 8. Internal reference voltage (Pin 6)
25 k
8
100
2
1.0 mA
2.5 k
2.5 k
96 11840
96 11837
Figure 6. Decoupling capacitor (Pin 2)
Figure 9. Audio output 2 (Pin 8)
3
600
600
2.8 V
9
1.75 V
96 11841
96 11838
Figure 7. FM sound IF input (Pin 3)
8 (11)
Figure 10. Volume control (Pin 9)
TELEFUNKEN Semiconductors
Rev. A1, 20-May-97
Preliminary Information
U2861B
Internal Pin Configuration (continued)
3.5 V
40 k
50 k
25 k
13
2.4 V
10
96 11845
96 11842
Figure 11. Audio input 2 (Pin 10)
Figure 14. Switch 1 (Pin 13)
2.8 V
50 k
5 k
14
13 k
11
2.1 V
96 11843
96 11846
Figure 12. Audio switch 2 (Pin 11)
Figure 15. De-emphasis (Pin 14)
3.5 V
5 k
12
5
5 k
2.3 V
100
25 k
1.2 mA
12704
96 11844
Figure 13. Audio output 2 (Pin 12)
Figure 16. Mute switch (Pin 5)
TELEFUNKEN Semiconductors
9 (11)
Rev. A1, 20-May-97
Preliminary Information
U2861B
Package Information
Package DIP14
Dimensions in mm
7.77
7.47
20.0 max
4.8 max
6.4 max
3.3
0.5 min
0.36 max
1.64 0.58
1.44 0.48
9.8
8.2
2.54
15.24
14
8
technical drawings
according to DIN
specifications
13020
1
7
5.2
4.8
Package SO14
Dimensions in mm
8.75
7.62
3.7
1.4
0.25
0.2
0.4
3.8
0.10
1.27
6.15
5.85
14
8
technical drawings
according to DIN
specifications
13035
1
7
10 (11)
TELEFUNKEN Semiconductors
Rev. A1, 20-May-97
Preliminary Information
U2861B
Ozone Depleting Substances Policy Statement
It is the policy of TEMIC TELEFUNKEN microelectronic GmbH to
1. Meet all present and future national and international statutory requirements.
2. Regularly and continuously improve the performance of our products, processes, distribution and operating systems
with respect to their impact on the health and safety of our employees and the public, as well as their impact on
the environment.
It is particular concern to control or eliminate releases of those substances into the atmosphere which are known as
ozone depleting substances (ODSs).
The Montreal Protocol (1987) and its London Amendments (1990) intend to severely restrict the use of ODSs and
forbid their use within the next ten years. Various national and international initiatives are pressing for an earlier ban
on these substances.
TEMIC TELEFUNKEN microelectronic GmbH semiconductor division has been able to use its policy of
continuous improvements to eliminate the use of ODSs listed in the following documents.
1. Annex A, B and list of transitional substances of the Montreal Protocol and the London Amendments respectively
2. Class I and II ozone depleting substances in the Clean Air Act Amendments of 1990 by the Environmental
Protection Agency (EPA) in the USA
3. Council Decision 88/540/EEC and 91/690/EEC Annex A, B and C (transitional substances) respectively.
TEMIC can certify that our semiconductors are not manufactured with ozone depleting substances and do not contain
such substances.
We reserve the right to make changes to improve technical design and may do so without further notice.
Parameters can vary in different applications. All operating parameters must be validated for each customer
application by the customer. Should the buyer use TEMIC products for any unintended or unauthorized
application, the buyer shall indemnify TEMIC against all claims, costs, damages, and expenses, arising out of,
directly or indirectly, any claim of personal damage, injury or death associated with such unintended or
unauthorized use.
TEMIC TELEFUNKEN microelectronic GmbH, P.O.B. 3535, D-74025 Heilbronn, Germany
Telephone: 49 (0)7131 67 2831, Fax number: 49 (0)7131 67 2423
TELEFUNKEN Semiconductors
11 (11)
Rev. A1, 20-May-97
Preliminary Information
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