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| www..com sames FEATURES n EEPROM flexibility of data and mode configuration n 64 bits of OTP data factory programmed and locked s Customer specific configuration of stored data s Manchester or PSK mode custom set at factory s Minimum external component count s On-chip rectifier for powering up from RF signal s On-chip data modulator s s s s s s s s PRELIMINARY SA7110 READ-ONLY RF TRANSPONDER On-chip high voltage protection / regulation On-chip RF frequency extractor / prescaler DataShee External tank resonance capacitor for RF resonance Sufficient distance without resonance capacitor Outputs data automatically after powerup Low power dissipation Small size No external storage capacitor required .com DESCRIPTION This device is manufactured in the SAMES 1.2m N-well EEPROM process. It has 64bits of factory pre-programmed and locked bits in EEPROM memory. Its mode of operation is factory pre-programmed and locked in additional EEPROM. The mode of operation is either manchester coded or Phase Shift Keyed (PSK) coded. The device has an on-chip rectification circuit that converts the incoming rf signal to DC power feeding VDD. There is also an on-chip data modulator which works in conjunction with the rectifier. The time base is extracted by an on-chip RF clock extractor. High voltage protection is provided internally to protect against high voltages from the coil. The energy is stored on capacitance on chip due to low internal power consumption. These features result in a low external component count. Data is read at the RF interface by means of the on-chip modulator. The stored bits are clocked out sequentially during the read operation. An internal power-on reset is provided which allows the device to start reading out data at low voltages for improved tag range. .com 1/10 5600 PDS039-SA7110-001 REV. A .com 01-02-00 DataSheet 4 U .com www..com SA7110 PAD CONNECTIONS t4U.com DataShee .com .com 2/10 sames .com DataSheet 4 U .com www..com SA7110 BLOCK DIAGRAM t4U.com DataShee .com ABSOLUTE MAXIMUM RATINGS* Parameter Supply Voltage ESD protection Peak voltage across COIL1 or COIL2 to V SS Peak current through COIL 1,2 Storage temperature Operating temperature Symbol VDD Vpesd VCOIL1,2 VSS ICOIL1,2 Tst Top -30 -55 -40 +30 +125 +70 mA C C 3, 7 3 3 Min -0.3 -10 Max 9.4 TBD +10 Unit V V V Note 1, 2, 3, 4, 5 3, 8 3, 6 Note 1: Duration not to exceed 10 seconds, and no logic switching. .com Note 2: Referenced to Vss 3/10 sames .com DataSheet 4 U .com www..com SA7110 Note 3: Stresses above those listed under " absolute maximum ratings" may cause permanent damage to the device. This is a stress rating only and functional operation of the device at these or any other conditions above those indicated in the operating conditions section of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect the device reliability. Note 4: VDD level when absolute maximum current goes through coil inputs. Note 5: VDD level when absolute maximum voltage is across coil inputs. Note 6: Maximum peak voltage at COIL1 or COIL2 of incoming RF signal with VSS as reference. Clamping by front end protection circuitry. t4U.com DataShee Note 7: Maximum allowed peak current of incoming RF signal. Note 8: TBD - To be determined. ELECTRICAL CHARACTERISTICS DC Operating Conditions Parameter Chip dynamic current Symbol Min IDD Typ Max Unit A A Condition V DD = 3V V DD = 3V Clock stopped, COIL1, and COIL2 shorted to V SS C = 100pF R = 1.5Kohm Voltage when POR comes out of rest Histereses on POR V PORH 200 600 mV V POR <2 <3 V During power-up V DD - V SS rising Between coming out of reset and going back into reset programmed At specified current at COIL1 and COIL2 Static current for total chip IDDS 3 6 .com <1 TBD Electrostatic Protection V ESD - TBD V Data Retention Supply Voltage T DR V DD 10 2 - 8 Note1 years V Note 1: Maximum voltage is defined when forcing 10 mA on the coil inputs. .com 4/10 sames .com DataSheet 4 U .com www..com SA7110 AC Operating Conditions Clocking Parameter RF carrier frequency required at COIL1, 2 Symbol Min fRF = 1/TRF Typ Max Unit 400 KHz Condition Sustained RF in read mode 50 125 t4 Number of RF carrier clock periods per data bit NM om U.cManchester PSK NP - 64 16 - DataShee Coil Inputs Parameter Unmodulated Low Level Input Voltage at COIL1, COIL2 Symbol Min Typ Max Unit Condition Peak level referenced to VSS V ILU -0.7 -0.65 -0.6 .com V Peak level referenced to VSS ICOIL = 5mA Peak level referenced to VSS V ILMI -0.7 -0.65 -0.6 V Peak level referenced to VSS ICOIL = 5mA Unmodulated High Level Input Volrage at COIL1, COIL2 V IHU Modulated Low Level Input Volrage at COIL1, COIL2 Modulated High Level Input Volrage at COIL1, COIL2 8 V V IHMI 2.4 V .com 5/10 sames .com DataSheet 4 U .com www..com SA7110 PAD DESCRIPTION Pad No. 1 2 3 4 5 6 t4U.com 7 8 9 Pin No. Name VSS COIL1 COIL2 VDD TEST1 TEST2 TEST3 TEST4 TEST5 Description Ground External coil connections External coil connections Supply voltage Test Pad Test Pad Test Pad Test Pad Test Pad DataShee FUNCTIONAL DESCRIPTION The circuit is built up out of several functional blocks, control logic, coil interface, the power-on reset, and the memory module (EEPROM), The chip activates automatically during power-up as a result of the built in power-on reset. 1. Coil Interface .com Power is derived from a full wave rectifier bridge. Data modulation takes place by loading the coil inputs to the bridge with a modulating circuit. The coil interface includes on-chip high voltage protection. The system clock for the chip is derived by means of a clock extractor coupled to the rectifier circuit.The Clock extractor / prescaler is the time base generator for data reading. Data is read from the EEPROM to the coil interface where the rf signal is modulated by the data in either the Manchester coded or PSK mode. The chip is EEPROM (not part of data) programmed and locked for either Manchester coded or PSK mode application. Memory Array Data storage: The data EEPROM is arranged in an 8X8 bit array composed of 8 columns of 8bit bytes. The 64 bits of data stored in the array can be configured in any way as agreed with the client, and is factory programmed and locked in that way. This gives OTP (One Time Programmable) security. 2. Dode control: Additional mode control EEPROM is used to set the mode of data reading in either the Manchester or Phase Shift Keyed (PSK) mode. The mode is also OTP .com programmed at the factory according to client request. 6/10 sames .com DataSheet 4 U .com www..com SA7110 3. Control logic The control logic gets its clock from the clock extractor / prescaler and facilitates the reading of the data stored in the data EEPROM according to settings in the mode control EEPROM so as to differentiate between the Manchester or PSK mode of data reading. TIMING SPECIFICATIONS The COIL1 and COIL2 pads modulate the incoming rf signal with either Manchester encoded or PSK encoded data. The data will repeatedly be read out serially until the power t4U.com is reduced sufficiently to activate the power on reset again. In the Manchester data Shee D ta mode there are 64 rf carrier cycles for each data bit. In the PSK mode there are 16arf carrier cycles for each data bit. .com .com 7/10 sames .com DataSheet 4 U .com www..com SA7110 TYPICAL APPLICATION The chip powers up via the COIL1 and COIL2 pads, deriving its energy from the rf carrier wave through the resonating tank circuit made up by the external inductor, LT, and external capacitor, CT. The data will automatically start modulating the rf signal as soon as the chip has powered up to the power-on reset level. The built in voltage protection and regulation insures protection against high voltage from the tank circuit. t4U.com DataShee .com .com 8/10 sames .com DataSheet 4 U .com www..com SA7110 Note: t4U.com DataShee .com .com 9/10 sames .com DataSheet 4 U .com www..com SA7110 Disclaimer: The information contained in this document is confidential and proprietary to South African MicroElectronic Systems (Pty) Ltd ("SAMES") and may not be copied or disclosed to a third party, in whole or in part, without the express written consent of SAMES. The information contained herein is current as of the date of publication; however, delivery of this document shall not under any circumstances create any implication that the information contained herein is correct as of any time subsequent to such date. SAMES does not undertake to inform any recipient of this document of any changes in the information contained herein, and SAMES expressly reserves the right to make changes in such information, without notification,even if such changes would render information contained herein inaccurate or incomplete. SAMES makes no representation or warranty that any circuit designed by reference to the information contained herein, will function without errors and as intended by the designer. t4U.com .com Any sales or technical questions may be posted to our e-mail adress below: energy@sames.co.za For the latest updates on datasheets, please visit our web site: http://www.sames.co.za South African Micro-Electronic Systems (Pty) Ltd P O Box 15888, 33 Eland Street, Lynn East, Koedoespoort Industrial Area, 0039 Pretoria, Republic of South Africa, Republic of South Africa Tel: 012 333-6021 .com Fax: 012 333-8071 10/10 Tel: Fax: Int +27 12 333-6021 Int +27 12 333-8071 sames .com DataSheet 4 U .com |
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