ic-lsc 12-CHANNEL ACTIVE PHOTOSENSOR ARRAY
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1 Rev C2, Page 1/8 FEATURES Monolithic array of independent photosensors with excellent matching Compact photosensor size of 800 µm x 300 µm enabling high-quality encoder scanning at reduced system dimensions Narrow track pitch of 0.42 mm cuts down illumination efforts Enhanced EMI immunity due to on-chip pre-amplification Dark current compensation permits high temperature operation Open-collector outputs as highside current source Simple gain setting and current-to-voltage conversion by external load resistors Single supply operation from 4 V to 5.5 V Low power consumption Space saving, RoHS compliant optoqfn and optobga packages Options: extended temperature range of -40 to 125 C, customized COB modules, reticles and code discs APPLICATIONS Optical position encoding from analog sine/cosine signals Incremental encoders with index signal Motor commutation encoders PACKAGES 14-pin optobga 6.2 mm x 5.2 mm 32-pin optoqfn 5 mm x 5 mm / 0.9 mm BLOCK DIAGRAM Copyright 2006, 2010 ic-haus
2 Rev C2, Page 2/8 DESCRIPTION The sensor array, coming with 12 independent channels, 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. The sensor array features monolithically integrated photosensors with active areas of 800 µm x 300 µm each in combination with fast on-chip photocurrent amplifiers, enabling an analog output at reasonable signal strength to the circuit board. The highside current source output construction avoids a ground referenced signal and permits the subsequent electronics to adjust the gain. In its simplest form this is done by load resistors, for instance. The spectral sensitivity range includes visible to near infrared light, with the maximum sensitivity being close to a wavelength of 700 nm. Output currents of up to 50 µa are supplied under low light conditions, for instance when illuminated at only 3 µw/mm 2 by an 850 nm LED. The photocurrent gain is 46 db typically. PACKAGES PAD LAYOUT Chip size 2.80 mm x 2.76 mm PAD FUNCTIONS No. Name Function 1 VCC V Supply Voltage 2 A1 Highside Current Source Output 3 B1 Highside Current Source Output 4 C1 Highside Current Source Output 5 D1 Highside Current Source Output 6 E1 Highside Current Source Output 7 F1 Highside Current Source Output 8 F2 Highside Current Source Output 9 E2 Highside Current Source Output 10 D2 Highside Current Source Output 11 C2 Highside Current Source Output 12 B2 Highside Current Source Output 13 A2 Highside Current Source Output 14 GND Ground
3 Rev C2, Page 3/8 PIN CONFIGURATION obga LS2C (6.2 mm x 5.2 mm) PIN FUNCTIONS No. Name Function 1 VCC V Supply Voltage 2 A1 Highside Current Source Output 3 B1 Highside Current Source Output 4 C1 Highside Current Source Output 5 D1 Highside Current Source Output 6 E1 Highside Current Source Output 7 F1 Highside Current Source Output 8 F2 Highside Current Source Output 9 E2 Highside Current Source Output 10 D2 Highside Current Source Output 11 C2 Highside Current Source Output 12 B2 Highside Current Source Output 13 A2 Highside Current Source Output 14 GND Ground For dimensional specifications refer to the relevant package data sheet, available separately. IC top markings, such as <PRODUCT ID>, <ASSY CODE> or <LOT CODE>, indicate the orientation of the device. PIN CONFIGURATION oqfn32-5x5 (5 mm x 5 mm) PIN FUNCTIONS No. Name Function 1 VCC V Supply Voltage 2 n.c. 3 A1 Highside Current Source Output 4 B1 Highside Current Source Output 5 C1 Highside Current Source Output 6 D1 Highside Current Source Output 7 E1 Highside Current Source Output 8 F1 Highside Current Source Output n.c. 17 F2 Highside Current Source Output 18 E2 Highside Current Source Output 19 D2 Highside Current Source Output 20 C2 Highside Current Source Output 21 B2 Highside Current Source Output 22 A2 Highside Current Source Output 23 n.c. 24 GND Ground n.c. BP Backside Paddle Pin numbers marked n.c. are not in use. The backside paddle is not intended as an electrical connection point; when used as shield a single link to GND is permissible.
4 Rev C2, Page 4/8 PACKAGE DIMENSIONS oqfn32-5x5 RECOMMENDED PCB-FOOTPRINT R0.15 TOP SIDE BOTTOM dra_lsc-oqfn32-2_pack_1, 10:1 Maximum molding excess +20 µm / -200 µm versus surface of glass. All dimensions given in mm.
5 Rev C2, Page 5/8 ABSOLUTE MAXIMUM RATINGS These ratings do not imply operating conditions; functional operation is not guaranteed. Beyond these ratings device damage may occur. Item Symbol Parameter Conditions Unit No. Min. Max. G001 VCC Voltage at VCC V G002 I(VCC) Current in VCC ma G003 V() Pin Voltage, all signal outputs -0.3 VCC+0.3 V G004 I() Pin Current, all signal outputs ma G005 Vd() ESD Susceptibility, all pins HBM, 100 pf discharged through 1.5 kω 2 kv G006 Tj Junction Temperature C G007 Ts Chip Storage Temperature C THERMAL DATA Item Symbol Parameter Conditions Unit No. Min. Typ. Max. T01 Ta Operating Ambient Temperature Range package obga LS2C C package oqfn32-5x5* C (extended temperature range on request) T02 Ts Storage Temperature Range package obga LS2C C package oqfn32-5x5* C T03 Tpk Soldering Peak Temperature package obga LS2C T04 Tpk Soldering Peak Temperature package oqfn32-5x5* tpk < 20 s, convection reflow 245 C tpk < 20 s, vapor phase soldering 230 C TOL (time on label) 8 h; Please refer to customer information file No. 7 for details. tpk < 20 s, convection reflow 245 C tpk < 20 s, vapor phase soldering 230 C MSL 5A (max. floor live 24 h at 30 C and 60 % RH); Please refer to customer information file No. 7 for details. *) Package qualification pending. 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.
6 Rev C2, Page 6/8 ELECTRICAL CHARACTERISTICS Operating conditions: VCC = V, Tj = C, unless otherwise stated Item Symbol Parameter Conditions Unit No. Min. Typ. Max. Total Device 001 VCC Permissible Supply Voltage V 002 I(VCC) Supply Current in VCC, dark E() = 0 2 ma Tj = 27 C 1.5 ma 003 I(VCC) Supply Current in VCC λ LED = λpk, E() = 0.1 mw/cm 2 4 ma Tj = 27 C 2.2 ma 004 Vc()hi Clamp-Voltage hi at all pins I() = 4 ma 11 V 005 Vc()lo Clamp-Voltage lo at all pins I() = -4 ma V Photosensors 101 E()mxr Permissible Irradiance λ LED = λpk 0.2 mw/ cm Aph() Radiant Sensitive Area 0.8 mm x 0.3 mm per sensor 0.24 mm λar Spectral Application Range Se(λar) = 0.25 x S(λ)max nm see Figure λpk Peak Sensitivity Wavelength see Figure nm 105 S(λ) Spectral Sensitivity λ LED = λpk 0.45 A/W Photocurrent Amplifiers 201 Iph() Permissible Photocurrent Operating Range 202 η()r Photo Sensitivity (light-to-voltage conversion ratio) per sensor na λ LED = 740 nm A/W 203 CR() Photocurrent Gain CR() = Iout() / Iph() fc()hi Cut-off Frequency (-3 db) khz 205 Iout()m Channel Matching deviation from mean value % 206 Iout()m Channel Cross Talk only one photosensor illuminated at the same time Current Source Outputs 301 Vout() Permissible Output Voltage (Operating Range) 0 % 1 VCC Iout() Permissible Output Current Vout() = 1 V... VCC V -50 µa VCC = V, Vout() = 1 V... VCC - 2 V -200 µa 303 tr(), tf() Output Current Rise/Fall Time Iph: na, 1T settling (63%); Vout() = constant 0.7 µs CL = 30 pf, RL() = 10 kω 0.8 µs 304 Iout()0 Output Dark Current µa V Figure 1: Relative spectral response Figure 2: Typical directional characteristics
7 Rev C2, Page 7/8 APPLICATION CIRCUITS Figure 3: Optical encoder application example. Here, the sine-to-digital converter ic-nv is employed to output spike-free encoder quadrature signals featuring a minimum transition distance. ic-haus expressly reserves the right to change its products and/or specifications. An info letter gives details as to any amendments and additions made to the relevant current specifications on our internet website this letter is generated automatically and shall be sent to registered users by . 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 and does not assume liability for any errors or omissions in these 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.
8 Rev C2, Page 8/8 ORDERING INFORMATION Type Package Options Order Designation - chip 14-pin optobga 6.2 mm x 5.2 mm 14-pin optobga 6.2 mm x 5.2 mm 32-pin optoqfn 5 mm x 5 mm, thickness 0.9 mm glass lid on-chip reticle glass lid obga LS2C obga LS2C-xR oqfn32-5x5 For technical support, information about prices and terms of delivery please contact: ic-haus GmbH Tel.: +49 (61 35) Am Kuemmerling 18 Fax: +49 (61 35) D Bodenheim Web: GERMANY sales@ichaus.com Appointed local distributors:
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