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1、iC-MGpreliminary mk8-Bit Sin/Cos INTERPOLATION IC WITH RS422 DRIVER HJy+ICIUSiC-MGpreliminary mk8-Bit Sin/Cos INTERPOLATION IC WITH RS422 DRIVER HJy+ICIUSFEATURES Real-time tracking, no-missing-code interpolation to 200 kHz i叩ut frequency (with x5, to 20 kHz with x50) Selectable interpol. factors: x
2、1, x2, x4, x5, x10, x20, x25, x50 Excellent accuracy (typ. 0.6 LSB) and repeatability (typ.O.ILSB) Differential PGA inputs with selectable in put resista nee for voltage and current signals Adjustaole signal conditioning for offset, amplitude, phase Unique signal and calibration stabilization featur
3、e: supply of en coder LED or MR bridge via con trolled 40 mA curre nt source Fail-safe RS422 encoder quadrature outputs with index signal Adjustable index position and length (from 1/4 to 1 T) Preselectable minimum phase distance guarantees fail-safe counti ng Clipping, loss-of-signal and loss-of-tr
4、acking indication Setup via serial EEPROM interface Sub-system power switch offers reverse polarity protection for the overall system Single 5 V supply, operation from -25(40) C to +100(125) CRev B1, Page 1/19APPLICATIONS Optical and magnetic position sensors Rotary e ncoders Linear encodersPACKAGES
5、TSSOP20BLOCK DIAGRAMiC-MGpreliminary mk8-Bit Sin/Cos INTERPOLATION IC WITH RS422 DRIVER HJy+ICIUSiC-MGpreliminary mk8-Bit Sin/Cos INTERPOLATION IC WITH RS422 DRIVER HJy+ICIUShttp7/*wwwchaus.8mCopyright 2007 IC-HausiC-MG8-Bit Sin/Cos INTERPOLATION IC WITH RS422 DRIVER、TkW+lausRev B1, Page #/19prelimi
6、naryiC-MG8-Bit Sin/Cos INTERPOLATION IC WITH RS422 DRIVER、TkW+lausRev B1, Page #/19iC-MG8-Bit Sin/Cos INTERPOLATION IC WITH RS422 DRIVER、TkW+lausRev B1, Page #/19DESCRIPTIONiC-MG8-Bit Sin/Cos INTERPOLATION IC WITH RS422 DRIVER、TkW+lausRev B1, Page #/19iC-MG8-Bit Sin/Cos INTERPOLATION IC WITH RS422 D
7、RIVER、TkW+lausRev B1, Page #/19Interpolator iC-MG is a non-linear A/D converter which, by applying a count-safe vector principle, digitizes sine/cosine sensor signals with selectable resolution and hysteresis. The angle value is output incre- men tally via differential RS422 drivers as an en coder q
8、uadrature signal with an index pulse. The minimum phase distance can be preselected, thus generating fail-safe ecunter signals and enhancing the noise im- munity of the sensor systemProgrammable instrumentation amplifiers with selectable gain levels permit differential (in VDIFF or IDIFF moce) or si
9、ngle-ended input signals (in VREF or IREF mode). The modes of operation differen tiate between high impedanee (V modes) and low impedance (I modes). This adaptation of the iC to voltage or current signals enables MR sensor bridges or photosensors to be directly connected up to the device.The integra
10、ted signal conditioning unit allows signal amplitudes and offset voltages to be calibrated and also any phase error between the sine and cosine signals to be corrected.For the purpose of signal stabilization (to minimize the effects of temperature and aging), the condi- tioned signals are fed into t
11、he power supply controller which drives the transmitting LED of optical systems via the integrated 40 mA driver stage (output PWR). If MR sensors are connected this driver stage also powers the measuring bridges .If the control thresh olds are reached this is signaled at alarm message output NERR (s
12、ignal loss due to wire breakage, short circuit!ng, dirt or aging, for example).iC-MQ is protected against a reversed power supply voltage; the integrated supply switch for loads of up to 20 mA extends this protection to cover the overall system. The device is con figured via an exter nal EEPROM.iC-M
13、G8-Bit Sin/Cos INTERPOLATION IC WITH RS422 DRIVER、TkW+lausRev B1, Page #/19iC-MG8-Bit Sin/Cos INTERPOLATION IC WITH RS422 DRIVER、TkW+lausRev B1, Page #/19PACKAGESPIN CONFIGURATION TSSOP20 (top view)PZERO2NZERO lrrNSINZuZ：PSINVDDSLlT5_jZeGNDSPCOSNERRZVDDGNDAWo e7NCOSPWRSDA1 1191 118I I17i i16llJ15I i
14、14l i13I I12I 111i INANBSCLBPIN FUNCTIONSNo. Name Function1 PZERO put Zero Signal +2 NZERO I叩ut Zero Signal -3 NSIN put Sine Signal -4 PSINI叩ut Sine Signal +5 VDDS Subsystem Positive Supply Output6 GNDS Subsystem Ground Output7 PCOS Sput Cosine Signal +8 NCOS I叩ut Cosine Signal 9 PWR Controlled Power Supply Output (High-Side)10 SDA Serial E2PROM Interface, data line11 SCL Serial E2PROM Interface, clock line12 NBIncremental Output B13 BIncremental Output B+14 NAIncremental Output A-15 AIncremental Output A+16 GNDGround17 VDD +4.3 . 5.5 V Supply Voltage18 NZIncremental Index
