preliminary iC-LSHC 3-CHANNEL SIN/COS PHOTOSENSOR ARRAY Rev B1, Page 1/7 FEATURES APPLICATIONS ♦ Monolithic array of independent photosensors with excellent matching ♦ Compact photosensor size of 800 µm x 330 µm enabling smaller encoder systems ♦ Moderate alignment tolerance due to a track pitch of 1.08 mm ♦ Ultra low dark currents for operation to high temperature ♦ Low noise amplifiers with high transimpedance of typ. 4 MΩ ♦ Short-circuit-proof, low impedance voltage outputs for enhanced EMI tolerance ♦ Low power consumption from single 5 V supply ♦ Operational temperature range of -40 to 125 °C ♦ Space saving 15-pin optoBGA package (RoHS compatible) ♦ Available options - reticle assembly, code discs - customized COB modules ♦ Optical position encoding from analog sine/cosine signals ♦ Incremental encoders with interpolation ♦ Absolute position encoders using nonius scales PACKAGES 15-pin optoBGA Chip 6.2 mm x 5.2 mm 2.88 mm x 3.37 mm BLOCK DIAGRAM VCC VREF GND iC-LSHC - REFERENCE VOLTAGE + PS_N - DPS_N + NS_N - DPC_N DPS_N DPC_N DNC_N DNS_N DNS_N - DNC_N - DPS_M DPC_M DPS_M DPC_M - DNC_M DNS_M DNS_M + Copyright © 2009 iC-Haus - PC_M DNC_M - NC_M + DPS_S + NS_S NC_N + + PS_S + + NS_M PC_N + + PS_M - DPC_S DPS_S DPC_S DNC_S DNS_S DNS_S - PC_S + DNC_S - NC_S + http://www.ichaus.com preliminary iC-LSHC 3-CHANNEL SIN/COS PHOTOSENSOR ARRAY Rev B1, Page 2/7 DESCRIPTION The iC-LSHC photosensor is a general purpose optoelectronic scanner made to suit a variety of encoding applications, such as rotary and linear encoders used for motion control, robotics, brushless DC motor commutation, power tools etc. iC-LSHC features 12 monolithically integrated photosensors with active areas of 800 µm x 330 µm each. A high transimpedance gain of typically 4 MΩ generates output signals of a few hundret Millivolts already from illumination levels of 0.3 to 0.7 mW/cm2 . In most cases no additional measures must be considered to filter for noise and interferences. Sine/cosine encoders are the typical application for iC-LSHC. Its 3-track scanning features a set of 4 pho- tosensors each per track, generating positive and negative going sine signals, as well as positive and negative going cosine signals. An excellent matching and common mode behavior of the differential signal paths is obtained by a paired amplifier design, reducing the needs for external signal calibration to an absolute minimum. The spectral sensitivity range includes visible to near infrared light, with the maximum sensitivity being close to a wavelength of 680 nm. When using iCLSHC for encoder applications with typical disc and mask codes, a signal amplitude of approximately 1 V is typical under low light conditions, for instance when iC-LSHC is illuminated at only 1.5 mW/cm2 by an 740 nm LED. PACKAGES PAD LAYOUT (2.88 mm x 3.37 mm) PAD FUNCTIONS No. Name Function 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 VCC VREF PS_N NS_N PS_M NS_M PS_S NS_S NC_S PC_S NC_M PC_M NC_N PC_N GND +4.5..5.5 V Supply Voltage Reference Voltage Output N-Track Sine + N-Track Sine M-Track Sine + M-Track Sine S-Track Sine + S-Track Sine S-Track Cosine S-Track Cosine + M-Track Cosine M-Track Cosine + N-Track Cosine N-Track Cosine + Ground Notes: All outputs supply analog voltages. Dimension G4 is the reference radius of the chip center. preliminary iC-LSHC 3-CHANNEL SIN/COS PHOTOSENSOR ARRAY Rev B1, Page 3/7 PIN CONFIGURATION oBGA LSH2C (6.2 mm x 5.2 mm) PIN FUNCTIONS No. Name Function A2 A3 A4 B1 B2 B3 B4 C1 C2 C3 C4 D1 D2 D3 D4 VCC VREF GND PS_N NS_N NC_N PC_N PS_M NS_M NC_M PC_M PS_S NS_S NC_S PC_S +4.5..5.5 V Supply Voltage Reference Voltage Output Ground N-Track Sine + N-Track Sine N-Track Cosine N-Track Cosine + M-Track Sine + M-Track Sine M-Track Cosine M-Track Cosine + S-Track Sine + S-Track Sine S-Track Cosine S-Track Cosine + preliminary iC-LSHC 3-CHANNEL SIN/COS PHOTOSENSOR ARRAY Rev B1, Page 4/7 ABSOLUTE MAXIMUM RATINGS These ratings do not imply operating conditions; functional operation is not guaranteed. Beyond these ratings device damage may occur. Item No. Symbol Parameter Conditions Unit Min. Max. G001 VCC Voltage at VCC -0.3 6 V G002 I(VCC) Current in VCC -20 20 mA G003 V() Pin Voltage, all signal outputs -0.3 VCC + 0.3 V G004 I() Pin Current, all signal outputs -20 20 mA G005 Vd() ESD Susceptibility, all pins 2 kV G006 Tj Junction Temperature -40 150 °C G007 Ts Chip Storage Temperature Range -40 150 °C HBM, 100 pF discharged through 1.5 kΩ THERMAL DATA Item No. T01 T02 T03 Symbol Parameter Conditions Unit Min. Ta Ts Tpk Typ. Max. Operating Ambient Temperature Range package oBGA LSH2C (extended temperature range on request) -20 90 °C Storage Temperature Range package oBGA LSH2C -40 110 °C Soldering Peak Temperature package oBGA LSH2C 245 230 °C °C tpk < 20 s, convection reflow tpk < 20 s, vapor phase soldering TOL (time on label) 8 h; Please refer to customer information file No. 7 for details. All voltages are referenced to ground unless otherwise stated. All currents flowing into the device pins are positive; all currents flowing out of the device pins are negative. preliminary iC-LSHC 3-CHANNEL SIN/COS PHOTOSENSOR ARRAY Rev B1, Page 5/7 ELECTRICAL CHARACTERISTICS Operating conditions: VCC = 4.5...5.5 V, Tj = -40..125 °C, unless otherwise stated Item No. Symbol Parameter Conditions Unit Min. Typ. Max. Total Device 001 VCC Permissible Supply Voltage 002 I(VCC) Supply Current in VCC no output load, photocurrents within linear operating range (no override) 4.5 003 Vc()hi Clamp-Voltage hi at all pins I() = 4 mA 004 Vc()lo Clamp-Voltage lo at all pins I() = -4 mA -1.2 Se(λ ar) = 0.25 x S(λ )max 400 9.5 5.5 V 15 mA 11 V -0.3 V 950 nm Photosensors 101 λ ar Spectral Application Range 102 λ pk Peak Sensitivity Wavelength 103 Aph() Radiant Sensitive Area 0.8 mm x 0.33 mm 104 S(λ ) Spectral Sensitivity 105 S(λ pk)max Maximum Spectral Sensitivity 106 E()mxr λ LED = 740 nm, Vout() not yet saturated Irradiance For Maximum Signal Level 680 nm 0.264 mm2 λ LED = 740 nm 0.5 A/W λ LED = λ pk 0.55 A/W 0.15 0.5 0.8 mW/ cm2 280 nA 1.2 2.0 V/µW 4.0 5.46 Photocurrent Amplifiers 201 Iph() Permissible Photocurrent Operating Range 0 202 η()r Photo Sensitivity λ LED = 740 nm (light-to-voltage conversion ratio) 0.8 203 Z() Equivalent Transimpedance Gain Z = Vout() / Iph() 2.69 204 TCz Temperature Coefficient of Transimpedance Gain 209 ∆Z()pn Transimpedance Gain Matching P vs. N path per diff. channel -0.2 0.2 % 210 ∆Vout()pn Signal Matching no illumination, any output to any output -35 35 mV 211 ∆Vout()pn Signal Matching no illumination, P.. output vs. corresponding N.. output -2.5 2.5 mV 212 fc()hi Cut-off Frequency (-3 dB) 280 kHz 213 VNoise() RMS Output Noise illuminated to 500 mV signal level above dark level, 500 kHz band width -0.12 120 180 MΩ %/°C 0.5 mV Signal Outputs 301 Vout()mx Permissible Maximum Output Voltage illumination to E()mxr, linear gain 302 Vout()d Dark Signal Level no illumination, load 20 kΩ vs. +2 V 303 Vout()acmx Maximum Signal Level Vout()acmx = Vout()mx - Vout()d 304 Isc()hi Short-Circuit Current hi load current to ground 305 Isc()lo Short-Circuit Current lo 306 Ri() Internal Output Resistance 307 ton() Power-On Settling Time VCC = 0 V → 5 V 2.45 2.72 3.02 V 600 770 1000 mV 1.48 1.96 2.35 V 100 420 800 µA load current to IC 250 480 700 µA f = 1 kHz 70 110 180 Ω 100 µs 1000 mV +10 mV Reference Voltage VREF 401 VREF Reference Voltage I(VREF) = 0...+1.6 mA 600 402 dVout() Load Balancing I(VREF) = 0...+1.6 mA -10 770 403 Isc()hi Short-Circuit Current hi load current to ground 200 420 800 µA 404 Isc()lo Short-Circuit Current lo load current to IC 2 4.5 10 mA iC-LSHC preliminary 3-CHANNEL SIN/COS PHOTOSENSOR ARRAY Rev B1, Page 6/7 APPLICATION CIRCUITS Figure 1: Application example of absolute encoder iC-Haus expressly reserves the right to change its products and/or specifications. An Infoletter gives details as to any amendments and additions made to the relevant current specifications on our internet website www.ichaus.de/infoletter; this letter is generated automatically and shall be sent to registered users by email. Copying – even as an excerpt – is only permitted with iC-Haus approval in writing and precise reference to source. iC-Haus does not warrant the accuracy, completeness or timeliness of the specification on this site and does not assume liability for any errors or omissions in the materials. The data specified is intended solely for the purpose of product description. No representations or warranties, either express or implied, of merchantability, fitness for a particular purpose or of any other nature are made hereunder with respect to information/specification or the products to which information refers and no guarantee with respect to compliance to the intended use is given. In particular, this also applies to the stated possible applications or areas of applications of the product. iC-Haus conveys no patent, copyright, mask work right or other trade mark right to this product. iC-Haus assumes no liability for any patent and/or other trade mark rights of a third party resulting from processing or handling of the product and/or any other use of the product. As a general rule our developments, IPs, principle circuitry and range of Integrated Circuits are suitable and specifically designed for appropriate use in technical applications, such as in devices, systems and any kind of technical equipment, in so far as they do not infringe existing patent rights. In principle the range of use is limitless in a technical sense and refers to the products listed in the inventory of goods compiled for the 2008 and following export trade statistics issued annually by the Bureau of Statistics in Wiesbaden, for example, or to any product in the product catalogue published for the 2007 and following exhibitions in Hanover (Hannover-Messe). We understand suitable application of our published designs to be state-of-the-art technology which can no longer be classed as inventive under the stipulations of patent law. Our explicit application notes are to be treated only as mere examples of the many possible and extremely advantageous uses our products can be put to. preliminary iC-LSHC 3-CHANNEL SIN/COS PHOTOSENSOR ARRAY Rev B1, Page 7/7 ORDERING INFORMATION Type Package iC-LSHC optoBGA 6.2 mm x 5.2 mm optoBGA 6.2 mm x 5.2 mm optoBGA 6.2 mm x 5.2 mm optoBGA 6.2 mm x 5.2 mm optoBGA 6.2 mm x 5.2 mm Options Order Designation reticle 26-256 NMS reticle 26-1024 NMS reticle 26-2048 NMS reticle 42-2048 NMS iC-LSHC chip iC-LSHC OBGA LSH2C iC-LSHC OBGA LSH2C-4R iC-LSHC OBGA LSH2C-1R iC-LSHC OBGA LSH2C-2R iC-LSHC OBGA LSH2C-6R Nonius Code Disc 255/256/240 PPR, OD/ID ∅26/11.6 mm, glass LSHC4S 26-256N Nonius Code Disc 255/256/240 PPR, OD/ID ∅26/7 mm, plastic LSHC5S 26-256N Nonius Code Disc 1023/1024/992 PPR, OD/ID ∅26/11.6 mm, glass LSHC1S 26-1024N Nonius Code Disc 2047/2048/2016 PPR, OD/ID ∅26/11.6 mm, glass LSHC2S 26-2048N Nonius Code Disc 2047/2048/2016 PPR, OD/ID ∅42/18 mm, glass LSHC6S 42-2048N For technical support, information about prices and terms of delivery please contact: iC-Haus GmbH Am Kuemmerling 18 D-55294 Bodenheim GERMANY Tel.: +49 (61 35) 92 92-0 Fax: +49 (61 35) 92 92-192 Web: http://www.ichaus.com E-Mail: [email protected] Appointed local distributors: http://www.ichaus.com/sales_partners