ptc - 01 programmer for melexis ptc devices ptc - 01 programmer rev 2.0 15/nov/2001 page 1 features and benefits rs - 232 serial interface 16 - bit voltage measurement 12 - bit voltage adjustment compact design internal or external supply voltage 4 lead sip (50mil) rj45 external connector high - level functions in firmware applications lab and protot ype use production use ordering information part no. description ptc - 01 programmer unit ptc - sa35 (included) 1a 24vdc s upply (auto, 100 - 240vac 50/60hz) accessories ptc01 software (for windows nt, 95, and later) mlx90215 development kit description the ptc - 01 programmer was designed for efficient and precise calibration of the melexis family of programmable ics. the programmer is designed to be easily adapted to a standard pc to allow calibration of programmable sensor ics within the oper ating environment. the ptc - 01 programmer contains its own programmable power supply and measurement circuitry. the programmer is similar to a stand ard eeprom programmer, but adds special features such as 16 bit voltage and current measurement capability, and a configuration options that will accommodate users from the prototyping phase directly into production. an ibm compatible pc is required (not i ncluded) to load software to the programmer and control the functions of the programmer. dos and windows platforms are availabl e, as well as source code and firmware. communication is done through a standard rs - 232 null modem cable to a com port of the pc . the pc requires no custom configuration, allowing the programmer to be used with any pc with a com port speed of 19.2kbs or better. functional diagram
ptc - 01 programmer for melexis ptc devices ptc - 01 programmer rev 2.0 15/nov/2001 page 2 programmable supply voltage (dac) parameter min typ max units number of dac channels - 2 - channels output voltage range 0 - 20 volts output current range channel 1 - 30 - ma output current range channel 2 - 300 - ma digital resolution of dac - 12 - bits analog resolution of dac - 4.88 - mv/lsb internal 5v reference 4.995 5.000 5.005 v explanation of 2 analog output channels the internal dac provides two 12 - bit analog output channels from 0v to 20v. both analog output channels are short circuit protected . both analog output channels are specifically designed to provide the level shiftin g of vdd and vout to make possible programming of a melexis ptc device. it is not recommended that the analog output channels be used for any purpose other than programming melexis ptc devices. current limits both channels have a fixed current limit which is not adjustable or programmable. channel 1 (da1) is limited to 30ma and does not allow measurement of current. channel 2 (da2 ) is limited to 300ma and allows measurement of current with the internal adc. external power connections external jack for +24 vdc 300ma for modular supply (supplied by melexis as standard power supply) external banana jacks for +24vdc and optional +5.000 v precision power supply. internal voltages the ptc - 01 uses a regulated (lm317) 22vdc linear voltage source for main power. two regulated 5vdc voltage sources are also used for analog and digital 5v. voltage references the dac - adc calibration is gene rated by a 2.5v internal reference. calibration is done digitally, with calibration parameters stored in non - volatile ram. calib ration is recommended every 12 months at a the melexis facility. an external precision 5vdc reference can be used by enabling the external supply. if the external 5v option is used, it will only be used during analog measurement of vdd and vout. the int ernal reference is always used for digital functions of the programmer.
ptc - 01 programmer for melexis ptc devices ptc - 01 programmer rev 2.0 15/nov/2001 page 3 voltage measurement circuit (adc) parameter min typ max units number of adc channels - 4* - channels input voltage range (ain1, ain2, ain4) 0.25 - 20 volts input current range (ain3) 0 - 300 ma digital resolution of adc - 15 - bits voltmeter resolution - 305 - uv/lsb currentmeter resolution - 4.5 - ua/lsb * single channel a/d converter multiplexed to 4 channels explanation of analog measurement channels the internal voltmeter of the ptc - 01 is a 16 - bit a/d converter with a range of 25mv - 20v. the resolution is therefore approximately 0.3mv per step. the adc is multiplexed to 4 analog input channels (ain1 ? ain4 ) their function is described below: adc mux channel function ptc pin ad1 voltage measurement of da1 vout ad2 voltage measurement of da2 vdd ad3 current measurement of da2 vdd ad4 voltage measurement output vout all 4 channels are over - vo ltage and short - circuit protected typical performance characteristics parameter min typ max units voltmeter absolute accuracy - 5 5 mv ammeter absolute accuracy - 100 - 100 ua programmable power supply absolute accuracy - 50 50 mv operating temperature 20 25 30 c n ote: melexis reserves the right to make changes without further notice to any products herein to improve reliabi l- ity, function or design. melexis does not assume any liability arising from the use of any product or applic a- tion of any product or circuit described herein.
ptc - 01 programmer for melexis ptc devices ptc - 01 programmer rev 2.0 15/nov/2001 page 4 why use the ptc01 the ptc01 has been optimized specifically for calibration of melexis ptc devices. it was designed as a cost e ffective replacement for high priced ates. the embedded firmware allows programmers to quickly create custom software on any pl atform. the ptc01 was designed to meet the requirements of most sensor applications and adapt to most production environments. please contact melexis for support if any additional requirements are necessary. general description the ptc - 01 programmer w as specifically designed to program the melexis family of programmable sensor ics. at the heart of the programmer is a micropro cessor which generates the two - channel level shifting protocol which allows 3 - pin programming. the programmer can generate two independent precision waveforms from 0 - 20v such as needed for programming melexis linear hall ics. hall ic digital patterns are included in the standard firmware release which is pre - loaded into non - volatile ram at the factory. melexis also uses the ptc - 0 1 hardware as a hardware platform for some other melexis asic products, which require special firmware, not included in the stan dard release. upgrade information is available at www.melexis. com. communication the ptc - 01 programmer uses a standard serial interface with rs - 232 protocol. connection to the communications port is done with a null modem cable to a standard com port (s ee page 8). because the standard is rs - 232, the ptc - 01 is not limited to any a particular platform. the firmware commands can be executed in any language which permits serial communications. com settings for ptc - 01 baud rate: 19200 data bits: 8 parity: none stop bits: 1 flow control: none linear power supply the high current switching supplies of the sdap - 02 are replaced with a single 300ma 24v linear supply. the result is lower noise in the analog circuitry. the ptc - 01 can be used with the 24v supply as above, or can be connected to an external 24v and 5v precision supply if desired. the external supply option allows the user to utilize precision voltage supplie s which may be already implemented in an existing test platform. (this is illustrated on page 6.) optimized firmware the pt c - 01 has utilized the firmware to help make some common tasks more efficient. firmware functions are used for voltage measuremen ts, current measurements, and return multiple sets of data. the advanced firmware functions simplify software development and reduce test time. further details can be found in the ptc - 01 software documentation. versatile design the programmer?s phys ical design has been greatly improved for flexibility and portability. the integrated device socket is mounted to the top of th e unit for convenience. a sensor can also be connected to the programmer via the rj45 connector to allow remote calibration. si nce the ptc - 01 has been entirely constructed onto a single pc board, the unit can be stripped of its plastic case and mounted in to a card rack or chassis easily. pc requirements the ptc - 01 requires a pc capable of rs - 232 serial communications of 19200 ba ud. the minimum pc requirements include a 486 or higher processor with 8mb of ram and 4mb of available disk space. note: the melexis supplied software may have additional pc requirements.
ptc - 01 programmer for melexis ptc devices ptc - 01 programmer rev 2.0 15/nov/2001 page 5 ptc - 01 features 1.) dut socket 2.) reference magnet fixture 3.) rs - 232 port 4.) busy indicator 5.) power indicator 6.) reset swi tch 7.) vdd select switch 8.) external precision 5v supply input 9.) 5v gnd 10.) external 24vdc input 11.) 24v gnd 12.) rj - 45 co nnector for external device socket 13.) 24vdc power connector 1) vout 2) vout gnd 3) vdd gnd 4) memo 5) memo gnd 6) vdd 7) nc 8) nc 8 4 6 2 1 3 5 7 3 4 5 6 7 8 9 10 13 1 2 12 11 rj - 45 (ext. ptc) pinout
ptc - 01 programmer for melexis ptc devices ptc - 01 programmer rev 2.0 15/nov/2001 page 6 PTC-01 24v serial interface cable 24vdc in computer power supply reference magnet PTC-01 24v computer power supply external device configuration the PTC-01 can be adapted for any device connection using the rj-45 external connector. see pin description in this document for details. external supply disabled PTC-01 external vdd enabled computer precision supply precision voltmeter current source advanced configuration the configuration below is typical of most production environments, where compatibility with existing sytems is crucial. below the PTC-01 is shown operating in a system with another communications bus. the PTC-01 is used here as a digital bitloading device. communications bus basic configuration PTC-01 unit, power supply, serial inteface cable and software for the mlx90215 are included with standard package. all that is needed is a pc and a spare com port.
ptc - 01 programmer for melexis ptc devices ptc - 01 programmer rev 2.0 15/nov/2001 page 7 p tc - 01 configurations the previous page shows three different system configurations, from the portable lab setup to the precise f ully automated production setup. the first two configurations illustrate the ptc - 01 used as a sole instrument, utilizing the i nternal dacs and adcs, and also the included 24v supply. these configurations are suitable for low - volume programming and system prototyping. in these e x- amples the supplied software is more than ad e- quate configuration 3 is an example of the ptc - 01 being used only as the digital communication for a fully automated calibrat ion/test system. in high volume production systems there is often an existing sof t- ware/hardware platform that is preferred. the ptc01 is utilized through an existing test setup and controlled by custom software . the example shown is calibrating a hall - effect current sensor, with all analog measurement performed by precision m e- ters on the communications bus. the communic a- tions bus also controls the input parameters (ie the current source) to evaluates the sensor assembly. the ptc - 01 provides the digital and analog wav e- forms for programming and calibrating the melexis sensor. software melexis supplies software for the windows platform and will assist in other software solutions. melexis provides full support for its hardware and firmware. source code is available a t request. note: firmware and source code is available free of charge at request. melexis does not directly support source cod e development. however, melexis will assist in the formulation of algorithms and calibr a- tion techniques related to the application. melexis also has contacts with professional software deve l- o p ers. these individuals are very familiar with the melexis programmer and industrial software appl i- c a tions. please contact melexis for any questions related to software or software development. q uick set - up first, unpack the programmer from the carton. the contents should be: 1 ptc - 01 unit 1 serial communication cabl e (null modem) 1 ptc - sa35 power supply 1 mlx - rm - 10 reference magnet 1 software diskette or cd rom 1. ) plug the power cord into the programmer. there is no power switch on the ptc - 01, the unit can be powered on or off by unplugging the unit from t he line voltage. the green led on the front will illuminate to indicate the programmer is powered. 2.) plug in the serial ca ble. one end into the db - 9 jack on the pr o- gra m mer, the other into the serial com port of the pc. 3.) run the software. configure the software according to the instructions provided. the yellow led on the front panel will begin blinking to ind i- cate communication between the pc and programmer. 4.) insert the sensor. connect the sensor according to sensor instructions. the programmer is now ready for use. more detailed programming instructions are the sensor datasheets, ptc - 01 software documen tation, and melexis applications notes .
ptc - 01 programmer for melexis ptc devices ptc - 01 programmer rev 2.0 15/nov/2001 page 8 external application cable n ote: all ground connections used for twisted pair cable are shorted inside the ptc 01 . either pin two, three, or five , on the rj 45 can be connected to the sensor ground. shielded cable is recommended for long cable lengths (larger than 1 meter) and for severe industrial env i- ro n ments. cable lengths should not exceed 3 meters in lengths. connection to pin two on the mlx90215 (memo) is optional and al ternatively may be shorted ground. please refer to the mlx90215 datasheet for specific wiring instructions. rs232 communications cable 1 2 3 4 ptc mlx90215 sensor 1 2 3 4 dut socket 1) vdd 2) memo 3) gnd 4) vout
ptc - 01 programmer for melexis ptc devices ptc - 01 programmer rev 2.0 15/nov/2001 page 9 ptc - 01 physical characteristics for the latest version of this document, go to our website at: www.melexis.com or for additional information contact melexis di rect: europe and japan e - mail: sales_europe@melexis.com phone: 011 - 32 - 13 - 670 - 780 usa and rest of the world email: sales_usa@melexis.com phone: (603) - 223 - 2362
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