IC-LNB 18-bit optical encoder with spi and serial/parallel outputs 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 for excellent reliability ? very compact array size ? leading/trailing sampling of 10 binary tracks pitched at 400 m ? analog sine/cosine scanning with enlarged photodiodes and signal conditioning ? differential sine/cosine outputs with 1024 cpr and 500 mvpk ? absolute resolution of up to 18 bits by fast 8-bit vector-tracking interpolation ? unique flexcount ? circuit: freely selectable resolution for absolute and incremental data ? incremental quadrature outputs with 1 to 16 , 384 cpr and programmable index signal ? scalable shift-register for 12 to 18 bits and 1 s cycles at 16 mhz clock frequency ? parallel data output of 16 bits in gray code ? permanent ram monitoring by parity bits ? led illumination control (mean or sin/cos square) by 50 ma high-side current source ? alarm indication for configuration and illumination error (end of life) ? undervoltage detection ? 3.3 v-compatible spi and i/o ports for configuration and data ? 4 v to 5.5 v single supply operation ? operating temperature range of C40 c to 110 c ? small outline, optobga and optoqfn packages for smt ? available accessories: led and code discs (1024 cpr) applications ? absolute and incremental position sensors ? linear scales and rotary encoders ? motion control IC-LNB is an optoelectronic encoder ic for absolute linear and angle measuring systems, such as glass scales and encoders. photodiodes, amplifiers, and comparators, the entire signal conditioning unit, and interfaces for position data output have been monolithically integrated into the device. 38-pin optoqfn 5.0 mm x 7.0 mm 30-pin optobga lnb2c 7.6 mm x 7.1 mm
IC-LNB 18-bit optical encoder with spi and ser/par outputs 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. 2.0 an integrated led current control with a driver stage allows a transmitting led to be directly connected (e.g. ic-sn85). the optical receive power is kept constant by the control unit, regardless of temperature and aging effects. the receive power setpoint can be programmed. should the led current control exit its operating range, this is indicated at the error message output (end-of-life alarm at pin err). the photocurrent offset and photocurrent amplitude of the ana - log sine/cosine signals can be calibrated. these calibrated volt - age signals are lead out to pins psin, nsin, pcos, and ncos and are used by the integrated 8-bit vector-tracking interpola - tion circuit. IC-LNB synchronizes the interpolator and singleturn data to form a contiguous gray-coded position data word. 16 parallel ports, a scalable shift-register, the spi interface, as well as incremen - tal a/b/z signals are available for data output. by help of the unique flexcount ? circuit any angle resolution between 1 to 2 16 angle steps per revolution can be preset for the incremental signals and the absolute position value. after startup IC-LNB is configured using the spi interface. to make connection to a 3.3 v microcontroller easier, all digital i/o ports, including the spi, can be run on 3.3 v. key specifications general supply voltage +4 v to +5.5 v, typ. 15 ma i/o port supply voltage +3 v to +5.5 v i/o port characteristics cmos/ttl compatible, 2 ma @ 3.3 v, 3.5 ma @ 5 v led current control up to 50 ma esd susceptibility 2 kv (hbm 100 pf, 1.5 k ? ) operational temperature -40 c to +110 c packages (rohs compliant) 30-pin optobga lnb2c (7.6 x 7.1 x 1.8 mm) 38-pin optoqfn (5.0 x 7.0 x 0.9 mm) position acquisition singleturn resolution up to 18 bits / 360 @ sin/cos 1024 cpr absolute angle accuracy 1 lsb @ 16 bits operating speed 12,000 rpm @ 16 bits 6,000 rpm @ 17 bits 3,000 rpm @ 18 bits interpolation sin/cos input frequency 200 khz @ 6 bits, 100 khz @ 7 bits, 50 khz @ 8 bits resolution 6 bits to 8 bits (absolute outputs) this preliminary information is not tantamount to a guarantee of device characteristics. all rights to technical changes reserved pin functions name function vdd +3 v to +5.5 v i/o port supply voltage gnd i/o port ground vdda +4 v to +5.5 v supply voltage gnda ground sck spi clock input mosi spi data input miso spi data output cs spi chip select dir code direction / parallel output bit 13 nsl shift register load / parallel output bit 12 din shift register data input / parallel output bit 11 dout shift register data output / parallel output bit 10 clk shift register clock input / parallel output bit 9 po8 parallel output bit 8 po7 parallel output bit 7 po6 parallel output bit 6 pok power ok message / parallel output bit 5 inca incremental output a / parallel output bit 2 incb incremental output b / parallel output bit 3 incz incremental output z / parallel output bit 4 psin analog voltage output psin nsin analog voltage output nsin pcos analog voltage output pcos ncos analog voltage output ncos led led current control (highside output) err error message output tps test input psin / parallel output bit 1 tpc test input pcos / parallel output bit 0 tnc test input ncos / parallel output bit 15 tns test input nsin / parallel output bit 14 flexcount ? selectable resolution 1 to 16,384 cpr index position programmable, to all positions data interfaces spi 10 mhz, 3.3 v and 5 v, for configuration and position data serial shift register up to 16 mhz, 12 bits to 18 bits parallel outputs up to 6.6 mhz, 16 bits incremental outputs a/b to 6.6 mhz, 90 or 180 z index sin/cos outputs 500 mvpk (calibrated), up to 200 khz, load 1 ma max. available accessories led ic-sn85 blcc sn1c code disc lnb1s 42-1024 (glass 1mm, od ? 42.0 mm, id ? 18.0 mm, optical radius 17.6 mm, 1024 ppr)
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