TEMIC U4313B-A

U4313B
TELEFUNKEN Semiconductors
Low-Current Superhet Remote Control Receiver
Description
The U4313B is a monolithic integrated circuit in bipolar
technology for low-current UHF remote control superheterodyne receivers in amplitude- or frequencymodulated mode. Typical applications are keyless car
lock-, alarm or telecontrol remote indication systems.
Especially for automotive applications it supports a
superhet design with less than 1 mA total current
consumption, as required by the car manufacturers.
Features
D Usable for amplitude- and frequency-modulated
transmission systems
D Extremely low quiescent current approximately 1 mA
in the stand-by mode due to wake-up concept
D Wide power supply voltage range 3 to 13 V
D
D
D
D
Logarithmic AM demodulator
FM demodulator
Monoflop exit to wake up a microcontroller
High performance operational amplifier to realize
a data recovering filter
D Inverting clamping comparator with amplitude-
D Sensitive IF-amplifier for 10.7 MHz operating
depending hysteresis for data regeneration
frequency
Block Diagram
Wake up out
VS
10
VRef = 2.4V
3
7
6
13
5 Data out
Bandgap
11
Internal
VRef = 2.4 V
Inveting
clamping
comparator
Monoflop
RF
Level
Wake up
10.7 MHz
9
4
Quadrature
detector
IF
amplifier
8
12
2
Operational
amplifier
14
–
+
16
1
95 10213
log AM out
FM out
10.7 MHz
Data
filter
Figure 1. Block diagram
Rev. A1: 23.06.1995
1 (14)
U4313B
TELEFUNKEN Semiconductors
Pin Description
OPin+
1
16 OPin–
OPout
2
15 VS
RCwake
3
14 FMout
GND2
4
13 VRef
Compout
5
12 Discr
RC–
6
11 GND1
RC+
7
10 SWout
AMout
8
9
95 10322
IFin
Pin
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Symbol
OPin+
OPout
RCwake
GND2
Compout
RC–
RC+
AMout
IFin
SWout
GND1
Discr
VRef
FMout
VS
OPin–
Function
OP amplifier non inverted input
OP amplifier output
RC wake up reset time
Ground of the logical circuits
Inverting comparator output
Comparator time constant
Comparator time constant
AM current output
IF input
Wake up output
Ground of the analog circuits
FM discriminator tank
Reference voltage
FM discriminator output
Supply voltage
OP amplifier inverted input
Internal connections see figures 4 to 19
Figure 2. Pin description
Absolute Maximum Ratings
Parameters
Supply voltage
Power dissipation Tamb = 85°C
Junction temperature
Ambient temperature
Storage temperature
Symbol
VS
Ptot
Tj
Tamb
Tstg
Value
13
400
125
–40 to +85
–55 to +125
Unit
V
mW
°C
°C
°C
Symbol
RthJA
RthJA
Value
120
100
Unit
K/W
K/W
Thermal Resistance
Junction ambient
2 (14)
Parameters
DIP16
SO16L
Rev. A1: 23.06.1995
U4313B
TELEFUNKEN Semiconductors
Electrical Characteristics
VS = 5 V, Tamb = 25°C, fin = 10.7 MHz; FM part: fmod = 1 kHz, fdev = 22.5 kHz; AM part:, fmod = 1 kHz, m = 100%
unless otherwise specified
Parameters
Characteristics
Supply voltage range
Quiescent supply current
Active supply current
Bandgap
Regulated voltage
Output current
Source resistance
External capacitor
Power supply suppression
IF amplifier
Input resistance
Input capacitance
Typical internal 3 dB
frequency
–3 dB limiting point
Recovered data voltage
FM detector output
resistance
AM rejection ratio
Maximum AM input
voltage
AM quiescent current
Maximum AM current
Operational amplifier
Gain bandwidth product
Excess phase
Open loop gain
Output voltage range
Common mode input
voltage
Input offset voltage
Maximum output current
Common mode rejection
ratio
Total harmonic distortion
Power supply rejection
ratio
Rev. A1: 23.06.1995
Test Conditions / Pins
f = 50 Hz
Symbol
Min.
Pin 15
Pin 15
Pin 15
VS
Iq
Iact
3
Pin 13
Pin 13
Pin 13
Pin 13
Pin 13
Vref
Iref
RRef
Cref
psrr
2.3
Rin
Cin
f3dB
180
Pin 9
Pin 9
IF level 70 dBmV
Pins 9 and 14
Pin 9
Pin 14
Pin 14
m = 30%
Pins 9 and 14
Pin 9
Pin 8
Pin 8
VFM3dB
VFMout
RFMout
Max.
Unit
1
2.8
12
1.3
3.6
V
mA
mA
2.5
5
5
V
mA
2.4
2.3
10
60
330
5
8
50
AMrr
VAMmax
30
130
50
520
W
12
pF
MHz
230
10
22
100
37
4
80
70
1.55
6.5
3
g0
∆Vout
Vin
50
Pins 1 and 16
Pin 2
Pins 1 and 16
Vos
Iout
cmrr
d
0.7
0
65
85
thd
psrr
1
65
95
1.7
–2.5
85
dBmV
mV
kW
dB
dBmV
IAMout
IAMoutmax
ft
W
mF
dB
25
90
Pins 1, 2 and 16
Pins 1, 2 and 16
Pins 1, 2 and 16
Pin 2
Pins 1 and 16
Vin < 300 mV, f = 33 kHz,
unity gain circuit
Pin 2
f = 50 Hz
Pin 2
Typ.
mA
mA
MHz
degree
dB
V
V
+2.5
5
mV
mA
dB
3
%
dB
3 (14)
U4313B
Parameters
Clamping comparator
Typical common mode
input voltage range
Maximum distortion
voltage
Output voltage
Output voltage
TELEFUNKEN Semiconductors
Test Conditions / Pins
Pin 2
Vsignal = 100 mV,
R+ = R– = 50 kW,
C+ = C– = 200 nF,
fdisto = 50 Hz,
Pin 2
fsignal = 1 kHz
V2 > (V6 + V7) /2
(10 kW load to VRef)
Pin 5
V2 < (V6 + V7) /2
(10 kW load to VRef)
Pin 5
Wake up circuit
Minimum wake up level
Internal charging resistor
Threshold voltage
Output switch current
Output switch voltage
External wake up resistor
External wake up capacitor
Hold time (± 30%)
Delay time (± 30%)
Pin 9
Pin 3
Pin 3
Pin 10
Pin 10
Pins 3 and 13
Pins 3 and 13
Symbol
Min.
Vcmvr
0.8
Typ.
Vdmax
Vcout
0
150
Vcout
VRef
Vin
Rint
Vth
ISW
VSW
RWU
CWU
th
td
40
1.5
1.6
250
1)
IC version with non-inverting comparator available: U4311B
2)
Measured at Pin 9, referred to 330 W
3)
Protected by a Z-diode, see figure 13
4)
Valid for 0.1 mF ≤ CWU ≤ 10 mF and 22 kW ≤ RWU ≤ 680 kW
180
Max.
Unit
1.6
V
200
mV
250
mV 1)
550
5.5
dBmV 2)
kW
V
mA
V3)
kW
mF
s 4)
s 4)
22
10
1.5 RWU CWU
CWU 0.75 kW
Application
The U4313B is well-suited to implement UHF remote
control or data transmission systems, based on a low
current superheterodyne receiver concept. SAW-devices
may be used in the transmitter as well as in the receiver
local oscillator. The front end should be a discrete circuit
application with low-current UHF transistors like S822T
or S852T from TEMIC TELEFUNKEN microelectronic
GmbH. The frequency of the local oscillator can be determined either by coaxial resonators or SAW-devices. Due
to large SAW-resonator tolerance an IF-bandwidth and
*
4 (14)
*
in a FM-system additionally the discriminator amplitude
characteristic (figure 28)
of 300 kHz or higher is proposed. As the circuit needs only 3.0 V supply voltage for
operation, the front end may be a stacked design in order
to achieve a total receiver current consumption of approximately 1 mA. Figure 29 shows a principle receiver
concept diagram. The application notes ANT012,
ANT013 and ANT015 contain more detailed information
on complete RF links.
Rev. A1: 23.06.1995
U4313B
TELEFUNKEN Semiconductors
Circuit Description
General functions
pin 10 and can be used to wake up a microcontroller.
After an adjustable reset time, determined by the monoflop time constant, the integrated circuit rests down to the
sleep mode. In this case typically 1 mA supply current is
required. An external resistor matched at pin 3 to ground
blocks the wake-up circuit and gives fully function at
lower IF-level as to recognize in figures 24 and 27, but
supply current increases up to typically 2.8 mA.
The integrated circuit U4313B includes the following
functions: IF-amplifier, FM-demodulator, wake-up
circuit with monoflop, operational-amplifier, inverting
data comparator and voltage-regulator.
The 10.7 MHz IF-signal from the front end passes the
integrated IF-amplifier which operates for amplitude- or
frequency-modulated signals to either a logarithmic AMdemodulator which was implemented to avoid settling
time problems effected by use of an automatic gain
control system or a quadrature detector for FM. A data
shaping filter
advantageously realized with the internal high performance operational-amplifier
reduces
system bandwidth to an optimized compromise regarding
transmission distance and data recognition. Thus an optimal bit error rate can be achieved without any further
active component.
Function of the clamping comparator
The comparator connected to the output of the filter has
a level-dependent hysteresis and clamps its reference
voltage to the signal minimum and maximum peaks as
described later.
The output signal of the operational amplifier is fed to the
input of the inverting comparator and two peak detectors
(Q1 and Q2, figure 3). Their time constants are distinguished by RC+ and RC–. The components value must be
adapted to the transmission code. The time constant
should be large compared to the bit-rate for optimized
noise and hum suppression. To compensate the input transistors base-emitter-voltage differences these two signals
are buffered by Q3 and Q4. The mean value is used as
comparator threshold, the difference of the peak values
controls the hysteresis. This clamping comparator works
as a data regenerator.
Without IF-input signal
in the normal mode only the
IF-amplifier and the AM demodulator which operates as
a level strength indicator are activated. If the level of the
IF signal increases, the whole circuitry is turned on by the
wake-up circuit. This signal is externally available at
Another version of the IC, with a non-inverting clamping
comparator, is also available (U4311B). Therefore the operational amplifier can be used either as a non-inverting
or an inverting filter without the need of any additional
components.
*
*
*
VRef
1
2
3
4
ÎÎÎ
ÎÎÎ
6
5
7
8
95 10214
Q4
Q1
Q3
Q2
Inverter
Hysteresis
Op. amp.
Comparator
+ –
Comp. threshold
to pin 16
Figure 3. Principle function of the clamping comparator
Rev. A1: 23.06.1995
5 (14)
U4313B
TELEFUNKEN Semiconductors
Internal Pin Circuitry
95 9970
3
13
VRef
1
16
95 9972
Figure 6. Pin 3 RCwake
Figure 4. Pin 1 OPin+
4
95 9973
Figure 7. Pin 4 GND2
VRef
13
5
2
95 9971
95 9974
Figure 5. Pin 2 OPout
6 (14)
Figure 8. Pin 5 Compout
Rev. A1: 23.06.1995
U4313B
TELEFUNKEN Semiconductors
95 9975
13
13
95 10126
VRef
VRef
2
8
Figure 11. Pin 8 AMout
6
95 10127
9
Figure 9. Pin 6 RC–
7
Figure 12. Pin 9 IFin
13
VRef
95 10128
2
10
95 10125
Figure 10. Pin 7 RC+
Figure 13. Pin 10 SWout
Rev. A1: 23.06.1995
7 (14)
U4313B
TELEFUNKEN Semiconductors
11
13
VRef
95 10129
Figure 14. Pin 11 GND1
14
95 10132
12
Figure 17. Pin 14 FMout
13
95 10133
Figure 18. Pin 15 VS
95 10130
Figure 15. Pin 12 Discr
95 10134
15
VS
16
1
VRef
13
95 10131
Figure 16. Pin 13 VRef
8 (14)
Figure 19. Pin 16 OPin–
Rev. A1: 23.06.1995
U4313B
TELEFUNKEN Semiconductors
1400
0.005
1300
0.004
1200
0.003
1100
0.002
Vout ( mV )
l in ( mA )
Output
1000
0.001
900
Input
0
800
15
20
25
30
35
40
Time ( ms )
95 10333
Figure 20. Time domain response of 2 kHz Bessel low pass data filter
100
Data Recovering Filter
100 dBmV
Output current ( m A )
80
The test circuit in figures 23 and 26 includes an example
of a data recovering filter realized with the components
R1, R2, C1, C2, C3. It is of a second order Bessel type with
low pass characteristic, a 3 dB cut-off frequency of 2 kHz
and an additional high pass characteristic for suppressing
dc and low frequency ac components. Simulation of time
domain and frequency response is drawn in figures 20 and
22. This filter gives a typical application of a 1 kBaud
Manchester code amplitude modulated transmission.
70 dBmV
60
40
50 dBmV
20
30 dBmV
0
6
8
10
12
14
16
IF frequency ( MHz )
95 10332
Figure 21. IF-frequency response
0
V / Vmax ( dB )
–10
The low pass cut-off frequency and the maximum transimpedance Vout/Iin are distinguished by the further
external elements. Careful design of the data filter gives
optimized transmission range. For designing other filter
parameters look for filter design handbooks or programs
or request TEMIC TELEFUNKEN microelectronic
GmbH for support. Some proposals can be found in the
application notes ANT012, ANT013 and ANT015.
–20
–30
–40
0.01
The capacitor C2 is responsible for the high pass cut-off
frequency. For a correct pulse response this high pass cutoff frequency should be as low as possible. Figure 20
shows the transient response and the influence of the dc
component. The first pulses might be wrong if the high
pass cut-off frequency is too low. For this reason some
burst bits must be transmitted before the real data transmission starts. On the other hand, if the cut-off frequency
is too high, you might get in trouble with roof shaping of
the rectangle pulses at the operational amplifier output.
0.1
95 10334
1
10
100
Frequency ( kHz )
Figure 22. Frequency response of 2 kHz Bessel
low pass data filter
Rev. A1: 23.06.1995
9 (14)
U4313B
TELEFUNKEN Semiconductors
C7
10 mF
VS
56 W
R9
300 W
R10
C8
100 nF
C9
C10
10 mF
10 nF
IF input
C11
10 nF
R8
100 kW
15
14
13
12
11
10
9
1
2
3
4
5
6
7
8
Wake up
out
R1
95 10135
8.2 kW
16
C3
C2
C1
100 nF
10 nF
1.5 nF
30 kW
100 kW
R6
100 kW
R2
R5
R12
C4
100 nF
C12
Comparator
output
100 kW 220 nF
Data filter
output
R7
22 kW
100 kW
Wake up
R3
220 kW
R13
C5
220 nF
10 kW
R4
C6
220 nF
R11
10 kW
10
100
0
90
S+N
–10
AM output current ( m A )
LP-filter output voltage Vs+n/Vn ( dB )
Figure 23. AM test circuit with 2 kHz Bessel low pass data filter
–20
–30
–40
N (low level)
–50
–60
–70
+85°C
70
60
–40°C
50
40
30
10
0
20
40
60
80
IF-input level ( dmBV )
Figure 24. Signal to noise ratio AM
10 (14)
80
20
N (high level)
–80
95 10292
+25°C
100
10
95 10276
25
40
55
70
85
IF-input level (dBmV )
100
Figure 25. AM-demodulator characteristic vs. temperature
Rev. A1: 23.06.1995
U4313B
TELEFUNKEN Semiconductors
VS
TOKO A119ACS-19000Z
(L = 2.2 mH, C = 100 pF)
Filter
C7
10 mF
56
W
R9
300
W
R10
C8
100 nF
C9
8.2 k W
C2
R15
R14
22 k W
22 k W
C10
10 mF
IF input
22 pF
C11
10 nF
R8
100 k W
16
15
14
13
12
11
10
9
1
2
3
4
5
6
7
8
Wake up
out
R1
100 nF
95 10136
C3
1.5 nF
100 k W
R6
30 k W
C1
100 k W
R2
10 nF
R5
R12
C4
100 nF
C12
R11
10 k W
100 k W 220 nF
100 k W
Wake up
R7
22 k W
Data filter
output
R3
220 k W
R13
10 k W
C5
220 nF
Comparator
output
R4
C6
220 nF
10
2.5
C10 = 22 pF
0
S+N
–10
2.0
Output voltage ( V )
LP-filter output voltage Vs+n/Vn ( dB )
Figure 26. FM test circuit with 2 kHz Bessel low pass data filter
–20
–30
–40
–50
–70
0
20
95 10291
40
60
80
IF-input level ( dmBV )
0
10.3
100
Figure 27. Signal to noise ratio FM; deviation 22.5 kHz
Rev. A1: 23.06.1995
C10 = 47 pF
1.0
0.5
N
–60
1.5
95 10290
10.5
10.7
10.9
11.1
Frequency ( MHz )
Figure 28. FM-discriminator characteristic
11 (14)
U4313B
TELEFUNKEN Semiconductors
VS
350 mA
350 mA
Data out
RF in
1 mA
Power supply
Signal path
95 10137
Figure 29. Principle diagram UHF remote control receiver
Ordering Information
Extended Type Number
U4313B-A
U4313B-AFL
12 (14)
Package
DIP16
SO16L
Remarks
Rev. A1: 23.06.1995
U4313B
TELEFUNKEN Semiconductors
Dimensions in mm
Package DIP16
94 9128
Package SO16L
94 8961
Rev. A1: 23.06.1995
13 (14)
U4313B
TELEFUNKEN Semiconductors
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
14 (14)
Rev. A1: 23.06.1995