U2270B TEMIC | Alldatasheet
Document overview
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Technical content
Features
/C0068Carrier frequency fosc 100 KHz – 150 KHz /C0068Typical data rate up to 5 Kbaud at 125 KHz /C0068Suitable for Manchester and Bi-phase modulation /C0068Power supply from the car battery or from 5-V regulated voltage /C0068Optimized for car immobilizer applications /C0068Tuning capability /C0068Microcontroller-compatible interface /C0068Low power consumption in standby mode /C0068Power supply output for microcontroller
Applications
/C0068Car immobilizers /C0068Animal identification /C0068Access control /C0068Process control /C0068Further industrial applications Case: SO16 U2270B-FP enable Read / write base station MCU Unlock System RF– Field typ. 125 kHz Transp. IC e5530 e5550 e5560 Transponder / TAG 9300 Carrier output Data NF read channel Osc U2270B TK5530-PP e5530-GT TK5550-PP TK5560-PP Figure 1. *) IDIC stands for IDentification Integrated C ircuit and is a trademark of TEMIC.
Figure 2. Pinning
1 GND Ground
2 Output Data output
3 OE Data output enable
4 Input Data input
5 MS Mode select coil 1: Common
6 CFE Carrier frequency enable
7 DGND Driver ground
8 COIL 2 Coil driver 2
9 COIL 1 Coil driver 1
10 V EXT External power supply
11 DV S Driver supply voltage
12 V Batt Battery voltage
13 Standby Standby input
14 V S Internal power supply (5 V)
15 RF Frequency adjustment
16 HIPASS DC decoupling
6 V 6 V 18 V
Figure 4. Equivalent circuit of power supply and antenna driver is achieved via the on-chip power supply (see figure 4). driver circuit. Pin VS is used to connect a block capacitor.
operation modes to power the U2270B. All internal circuits are operated from one 5-V power rail. extended communication distance is required.
5 V (stabilized)
- Battery-voltage operation
i.e., a microcontroller (even in Standby mode). be assumed (refer to application note ANT019). Table 1. The following table summarizes the characteristics of the various operation modes.
1 V oltage regulator
1 Capacitor
5 V ± 10%
2 V oltage regulators
2 Capacitors
7 V to 8 V
6 V to 7 V
1 Transistor
1 Resistor
6 V to 16 V
Rev. A3, 13-Dec-96 7 (13) Function Table CFE MS COIL1 COIL2 ÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁ Low ÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁ Low ÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁ High ÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁ High ÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁ Low ÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁ High ÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁ Low ÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁ High ÁÁÁÁÁÁÁÁÁ Á ÁÁÁÁÁÁÁ Á Á ÁÁÁÁÁÁÁ Á ÁÁÁÁÁÁÁÁÁ High ÁÁÁÁÁÁÁÁ Á ÁÁÁÁÁÁÁ Á ÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁ Low ÁÁÁÁÁÁÁÁÁ Á ÁÁÁÁÁÁÁ Á Á ÁÁÁÁÁÁÁ Á ÁÁÁÁÁÁÁÁÁ High ÁÁÁÁÁÁÁÁ Á ÁÁÁÁÁÁÁ Á ÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁ High OE Output ÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁ Low ÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁ Enabled ÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁ High ÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁ Disabled Standby U2270B ÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁ Low ÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁ Standby mode ÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁ High ÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁ Active To achieve the suitable application, consider the power supply environment and the magnetic coupling situation. The selection of the appropriate power supply operation mode depends on the supply environment. If an unregulated supply voltage in the range of V = 7 V to 16 V is available, the internal power supply of the U2270B can be used. In this case, the standby mode can be used and an external low-current µC can be supplied. If a 5-V supply rail is available, it can be used to power the U2270B. In this case please check that the voltage is noise-free. An external power transistor is not necessary. The application depends also on the magnetic coupling situation. The coupling factor mainly depends on the transmission distance and the antenna coils. The following table lists the appropriate application for a given coupling factor. The magnetic coupling factor can be determined using the TEMIC test transponder coil. Magnetic Coupling Factor Appropriate Application ÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁ k > 3% ÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁ Free-running oscillator ÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁ k > 1% ÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁ Diode feedback ÁÁÁÁÁÁÁÁ Á ÁÁÁÁÁÁ Á ÁÁÁÁÁÁÁÁ k > 0.5% ÁÁÁÁÁÁÁÁÁ Á ÁÁÁÁÁÁÁ Á ÁÁÁÁÁÁÁÁÁ Diode feedback plus frequency altering ÁÁÁÁÁÁÁÁ Á ÁÁÁÁÁÁ Á ÁÁÁÁÁÁÁÁ k > 0.3% ÁÁÁÁÁÁÁÁÁ Á ÁÁÁÁÁÁÁ Á ÁÁÁÁÁÁÁÁÁ Diode feedback plus fine frequency tuning The maximum transmission distance is also influenced by the accuracy of the antenna’s resonance. Therefore, the recommendations given above are proposals only. A good compromise for the resonance accuracy of the antenna is a value in the range of f res = 125 kHz ± 3%. Further details concerning the adequate application and the antenna design is provided in the TEMIC application note ANT019 and in the TEMIC article “Antenna Design Hints”. The application of the U2270B includes the two capacitors C IN and C HP whose values are linearly dependend on the transponder’s data rate. The following table gives the appropriate values for the most common data rates. The values are valid for Manchester and Bi-phase code. Data Rate f = 125 kHz Input Capacitor (CIN) Decoupling Capacitor (CHP ) ÁÁÁÁÁÁ ÁÁÁÁÁÁ f/32 = 3.9 kbit/s ÁÁÁÁÁÁ ÁÁÁÁÁÁ 680 pF ÁÁÁÁÁÁ ÁÁÁÁÁÁ 100 nF ÁÁÁÁÁÁ ÁÁÁÁÁÁ f/64 = 1.95 kbit/s ÁÁÁÁÁÁ ÁÁÁÁÁÁ 1.2 nF ÁÁÁÁÁÁ ÁÁÁÁÁÁ 220 nF The following applications are typical examples. The values of CIN and CHP correspond to the transponder’s data rate only. The arrangement to fit the magnetic coupling situation is also independent from other design issues exept of one constellation. This constellation, consisting of diode feedback plus fine frequency tuning together with the two-rail power supply should be used if the transmission distance is in the range of d /C0091 10 cm.
Rev. A3, 13-Dec-96 9 (13) Application 3 This application is comparable to application 2 but alters the operating frequency. This permits higher antenna resonance tolerances and/or higher communication distances. This application is preferred if the detecting µC is close to the U2270B as an additional µC signal controls the adequate operating frequency. 82 /C00871.5 mH 1 nF 4x 1N4148 100 k/C0087 75 k/C0087 Antenna 1N4148 4.7 nF 43 k/C0087 68 k/C0087 V S RF V EXT DV S V Batt COIL 2 COIL 1 Input HIPASS DGND GNDC HP MS CFE Standby Output OE U2270B Micro- controller 22 /C0109F V DD 5 V GND 470 k/C0087 1.5 nF C IN V SS 12606 180 pF 100 /C0087 4.7 k/C0087 BC846 1.5 k/C0087 47 nF Figure 16.
Rev. A3, 13-Dec-96 10 (13) Absolute Maximum Ratings All voltages are referred to GND (Pins 1 and 7). Parameters/Conditions Pin Symbol Min. Typ. Max. Unit Operating voltage Pin 12 V Batt V S 16 V Operating voltage Pins 8, 9, 10, 11 and 14 V S, VEXT , DV S, Coil 1, Coil 2 –0.3 8 V Range of input and output voltages Pins 3, 4, 5, 6, 15 and 16 Pins 2 and 13 –0.3 –0.3 V S+0.3 V Batt V Output current Pin 10 IEXT 10 mA Output current Pin 2 IOUT 10 mA Driver output current Pins 8 and 9 ICoil 200 mA Power dissipation SO16 Ptot 380 mW Junction temperature Tj 150 °C Storage temperature Tstg –55 125 °C Ambient temperature Tamb –40 105 °C Thermal Resistance Parameters/Conditions Pin Symbol Min. Typ. Max. Unit Thermal resistance SO16 R thJA 120 K/W Operating Range All voltages are referred to GND (Pins 1 and 7) Parameters/Conditions Pin Symbol Min. Typ. Max. Unit Operating voltage Pin 12 V Batt 7 12 16 V Operating voltage Pin 14 V S 4.5 5.4 6.3 V Operating voltage Pin 10 Pin 11 V EXT DV S 4.5 8 Carrier frequency fosc 100 125 150 kHz
Rev. A3, 13-Dec-96 11 (13)
Electrical Characteristics
Test conditions (unless otherwise specified): VBatt = 12 V , Tamb = –40 to 105/C0095C Parameters Test Conditions / Pins Symbol Min. Typ. Max. Unit Data output – collector emitter saturation voltage Pin 2 Iout = 5 mA V CEsat 400 mV Data output enable – low level input voltage – high level input voltage Pin 3 V il V ih 2.4 0.5 V V Data input – clamping level low – clamping level high – input resistance – input sensitivity Pin 4 f = 3 kHz (squarewave) gain capacitor = 100 nF V il V ih R in 3.8 220 V V k/C0087 mV pp Driver polarity mode – low level input voltage – high level input voltage Pin 5 V il V ih 2.4 0.2 V V Carrier frequency enable – low level input voltage – high level input voltage Pin 6 V il V ih 3.0 0.8 V V Operating current Pin10, 11, 12 and 14
5 V application without
load connected to the coil driver IS 4.5 9 mA Standby current Pin 12
12 V application
– Supply voltage – Supply voltage drift – Output current Pin 14 V S dV s/dT IS 4.6 1.8 5.4 4.2 3.5 6.3 V mV/K mA Driver output voltage – One rail operation – Battery voltage operation IL = ±100 mA V S, VEXT , VBatt, DVS = 5 V V Batt = 12 V Pins 8 and 9 V DRV V DRV 2.9 3.1 3.6 4.0 4.3 4.7 V PP V PP Vext – Output voltage – Supply voltage drift – Output current – Standby output current Pin 10 IC active standby mode V EXT dV EXT /dT IEXT IEXT 4.6 3.5 0.4 5.4 4.2 6.3 V mV/K mA mA Standby input – low level input voltage – high level input voltage Pin 13 V il V ih 3.1 0.8 V V Oscillator – Carrier frequency RF-resistor = 110 k/C0087 (application 2), REM 1. f0 121 125 129 kHz Low pass filter – Cut off frequency Carrier freq. = 125 kHz fcut 7 kHz Amplifier – Gain C HP = 100 nF 30 Schmitt trigger – Hysteresis voltage 100 mV REM 1.: In application 1. where the oscillator operates in the free running mode, the IC must be soldered free from distortion. Otherwise, the oscillator frequency may be out of bounds.
Rev. A3, 13-Dec-96 12 (13) Dimensions in mm 94 8875
Rev. A3, 13-Dec-96 13 (13) 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