IC-LGC 21-bit optical position encoder with serial/parallel and sin/cos output am kuemmerling 18 ? d - 55294 bodenheim, germany tel. +49 6 1 35 / 9 2 9 2 -3 0 0 ? fax +49 6 1 35 / 9 2 9 2 -1 9 2 ? http://www.ichaus.com features ? system-on-chip design with integrated photosensors ? excellent matching and reliability ? differential scanning for emi immunity and operation up to 125 c ? enlarged assembly tolerance due to pre-positioned and post-positioned code scanning ? 13 digital tracks pitched at just 500 m ? 2 sine/cosine tracks with analog signal conditioning ? singleturn resolution of 16 to 21 bits by 3-bit flash or 8-bit s&h adc ? multiturn data processing via 2-pin a/b or ssi interface, embedded low power counter for battery supply ? led power control with a 50 ma highside driver ? adjustable temperature sensor with min/max alarm ? operational monitoring and alarm/warning messaging: missing code step, disc data error, configuration error, led end-of-life, out-of-range temperature ? safety features: crc-protected setup with verification, crc-protected data output with life counter ? o perating modes: hardware encoder (up to 16 bits), serial encoder (ssi, biss c), parallel encoder (8-bit parallel c) ? 4 to 5.5 v single supply operation, low power consumption ? small-outline optobga or blcc package for smt ? available accessories: led lamps and code discs ? options: extended temperature range of -40 to +125 c, customized cob modules, customized code designs applications ? absolute position encoders for safety-related controls ? analog and digital motor feedback systems ? robotics, tooling machines, servo drives IC-LGC is an optoelectronic encoder ic for absolute position sensors. photosensors, amplifiers and comparators, the entire signal conditioning and data processing unit and fast i/o inter - faces are monolithically integrated on the chip. 40-pin blcc package lg5c 10.2 mm x 11.9 mm 44-pin optobga package lg21c 8.0 mm x 10.0 mm
IC-LGC 21-bit optical position encoder am kuemmerling 18 ? d - 55294 bodenheim, germany tel. +49 6 1 35 / 9 2 9 2 -3 0 0 ? fax +49 6 1 35 / 9 2 9 2 -1 9 2 ? http://www.ichaus.com rev. 1.0 the scanning unit uses pre-positioned and post-positioned photosensors for each track to ease encoder assembly by mod - erating tolerances. differential evaluation of all sensors enables operation at high ambient temperatures. an integrated led power control with a highside driver guarantees illumination regardless of temperature or ageing effects. the chip features offset and amplitude calibration for the analog output signals also fed to the integrated 3-bit flash and the 8-bit sar interpolators. external multiturn sensors can be operated via an ssi or a/b counter interface; the count is maintained when a backup bat - tery is connected. IC-LGC synchronizes and combines all data to generate a single-step-proof position data word. the chip's operation is monitored with configurable alarms; crc verifica - tion of configuration data is also available. the serial i/o interface in biss c protocol (ssi is optional) has permanent bidirectional register communication. the user can access released data areas (e.g. oem data in the eeprom) without interfering with control cycles. alternatively, the 8-bit parallel microcontroller interface can be used for configuration and data exchange. pin functions name pin function vdd, vcca +4 v to +5.5 v digital and analog supply voltage gnd, agnd digital and analog ground vddm +3.0 to +5.5 v mt counter supply voltage lvcc +4 v to +5.5 v led driver supply voltage led led current source output rset led power control adjustment vnsin, vncos inverted sin/cos voltage outp. [alignm. d1, d0] isin, icos sin/cos current outputs vref +2.5 v reference voltage output npres preset input / alignment mode enable nres reset input / reset indication output ndir code direction reversal nerr error message output / system error input scl eeprom interface, clock output sda eeprom interface, data line mdi d(15) mt interface, data input or counter input b / parallel data output mcl d(14) mt interface, clock output or counter input a / parallel data output slo d(13) i/o interface, data output / parallel data output [alignm. v1 xor v13, tp] ma d(12) i/o interface, clock input / parallel data output sli d(11) i/o interface, data input / parallel data output sync d(10) synchronization input / parallel data output nrd d(9) c read signal / parallel data output nwr d(8) c write signal / parallel data output p(7...0) d(7...0) c data bus / parallel data output nl c data request input / par. data output latch tvn, tnn, tnp, tvp test mode current inputs key specifications general supply voltage 4 v to 5.5 v, typ. 10 ma mt counter supply 3.3 v to 5.5 v, typ. 4 a during power-down on-chip oscillator 5 mhz led power control 50 ma max. (highside current source output) esd susceptibilty 2 kv (hbm 100 pf, 1.5 k ? ) operational temperature range -20 c to +90 c (-40 c to +125 c optional) chip size 3.5 mm x 7 mm packages (rohs compliant) 40-pin blcc lg5c (10.2 x 11.9 x 1.6 mm) 44-pin optobga lg21c (8.0 x 10.0 x 1.6 mm) options on-chip reticle, reference code discs position acquisition singleturn resolution to 21 bits / 360 (@ sin/cos 8,192 ppr) multiturn resolution to 24 bits angle resolution disc lg2s 42-2048: 11+8 bits (524,288 cpt) disc lg3s 42-4096: 12+8 bits (1,048,576 cpt) absolute angle accuracy +/- 1 lsb @ 19 bits (mounted within 0.7 degree tilt angle) operating speed 12,000 rpm max. temperature monitoring range, resolution -64 c to +191 c, resolution 1 c (lsb) alarm output adjustable high/low alarm thresholds data interfaces serial i/o interface biss c, uni-/bidirectional, to 10 mhz ssi, binary or gray coded, to 4 mhz c interface 8-bit data bus, 1 mhz access cycle per byte mt interface 2-pin a/b quadrature counter, to 300 hz 2-pin serial ssi (200 khz, 12+1 to 24+1 bit, 1 binary word or 3 to 6 gray-coded words) analog outputs calibrated sine/cosine, 250 mvp, to 500 khz eeprom interface i 2 c compatible, to 16 kbit, crc error detection data and control registers (ram) position data 3 bytes for singleturn (with interpolation), 3 bytes for multiturn, 2 bytes for crc temperature data 1 byte calibration data 5 bytes (signal conditioning, temperature sensor) configuration and operation 33 bytes crc-protected configuration, error byte, life counter byte, command/status byte; biss c direct access registers (bank switch, eds, profile, s/n, id and measurement data) operational functions parameterization interface mode, resolution, disc model, multiturn functions, output formats, code direction, alarm messaging position preset via interfaces, or pin-triggered execution monitoring & alarm missing code step, corrupted single/multiturn data (disc error), eeprom link error, illumination error (led end-of-life), out-of-range temperature test and alignment analog sensor stimulation, alignment aids for radial position and tilt angle setup eeprom, c interface or serial i/o (biss c) this tentative information shall not be considered as a guarantee of cha - racteristics. rights to technical changes reserved.
|
