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