preliminary iC-PN2656 PHASED ARRAY NONIUS ENCODER 26-256 Rev B2, Page 1/7 FEATURES APPLICATIONS ♦ Compact photosensor for high-resolution nonius scanning ♦ Phased-array design for 255/256/240 PPR (N/M/S channel) with excellent signal matching ♦ Reduced cross talk due to moderate track pitch ♦ 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 ♦ Space saving optoQFN and optoBGA packages (RoHS compliant) ♦ Low power consumption from single 4.5 to 5.5 V supply ♦ Operational temperature range of -40 to +110 °C ♦ Suitable code discs: LSHC4S 26-256N (glass 1 mm) OD ∅ 26 mm, ID ∅ 11.6 mm, optical radius 10.905 mm LSHC5S 26-256N (plastic 1.15 mm), OD ∅ 26 mm, ID ∅ 7 mm, optical radius 10.905 mm ♦ Absolute position encoders PACKAGES 15-pin optoBGA 6.2 mm x 5.2 mm x 1.7 mm 32-pin optoQFN 5 mm x 5 mm x 0.9 mm BLOCK DIAGRAM iC-PN2656 Copyright © 2010 iC-Haus http://www.ichaus.com preliminary iC-PN2656 PHASED ARRAY NONIUS ENCODER 26-256 Rev B2, Page 2/7 DESCRIPTION The optical encoder iC-PN2656 features 24 monolithically integrated photosensors arranged as a phased-array. The high transimpedance gain of typically 4 MΩ generates output signals of a few hundred millivolts already from illumination levels of 1 to 2 mW/cm2 . In most cases no additional measures must be considered to filter for noise and interferences. Analog nonius-scale encoders are the typical application for iC-PN2656. Its 3-track scanning features a phased-array of 8 photosensors 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. An output voltage of approximately 1 V is typical under low light conditions, for instance when iC-PN2656 is illuminated at only 1.3 mW/cm2 by an 740 nm LED. PACKAGES INFORMATION 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 All outputs are analog voltage outputs. preliminary iC-PN2656 PHASED ARRAY NONIUS ENCODER 26-256 Rev B2, Page 3/7 PIN CONFIGURATION oBGA LSH2C (6.2 mm x 5.2 mm) 1 2 3 PIN FUNCTIONS No. Name Function A2 A3 A4 B1 B2 B3 B4 C1 C2 C3 C4 D1 D2 D3 D4 4 A B C D +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 + PIN FUNCTIONS No. Name Function PIN CONFIGURATION oQFN32-5x5 (5 mm x 5 mm) 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 1 2 3 4 5 6 7 8 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 9 10 11 12 13 14 15 16 Package qualification optoQFN32-5x5 pending. 1 2 3 4 5 6 7 8 17 18 19 20 21 22 24 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 BP Backside pad (oQFN32-5x5 only): not intended as an electrical connection point; when using as shield a single link to GND is permissible. preliminary iC-PN2656 PHASED ARRAY NONIUS ENCODER 26-256 Rev B2, 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 -40 150 °C HBM, 100 pF discharged through 1.5 kΩ THERMAL DATA Item No. T01 Symbol Parameter Conditions Unit Min. Ta Operating Ambient Temperature Range package oBGA LSH2C package oQFN32-5x5* T02 Ts Storage Temperature Range package oBGA LSH2C, package oQFN32-5x5* T03 Tpk Soldering Peak Temperature package oBGA LSH2C Typ. Max. -40 -40 110 110 °C °C -40 110 °C 245 230 °C °C 245 230 °C °C (extended temperature range on request) 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. T04 Tpk Soldering Peak Temperature package oQFN32-5x5* tpk < 20 s, convection reflow tpk < 20 s, vapor phase soldering 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. preliminary iC-PN2656 PHASED ARRAY NONIUS ENCODER 26-256 Rev B2, 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 load, photocurrents within linear op. 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(λar) = 0.25 x S(λ)max 400 9.5 5.5 V 15 mA 11 V -0.3 V 950 nm Photosensors 101 λar Spectral Application Range 102 λpk Peak Sensitivity Wavelength 680 nm 103 Aph() Radiant Sensitive Area 0.11 mm2 104 S(λ) Spectral Sensitivity λLED = 740 nm 0.5 A/W 105 S(λpk)max Maximum Spectral Sensitivity λLED = λpk 0.55 A/W 106 E()mxr λLED = 740 nm, Vout() not saturated Irradiance For Maximum Signal Level 0.7 1.3 2.1 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 λLED = 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.. channel vs. corresponding N.. channel -0.2 0.2 % 210 ∆Vout()pn Signal Matching no illumination, any output vs. 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 preliminary iC-PN2656 PHASED ARRAY NONIUS ENCODER 26-256 Rev B2, Page 6/7 APPLICATION CIRCUITS Disc iC-PNxxxx iC-MN Figure 1: Application example of absolute encoder circuit. 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 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 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. preliminary iC-PN2656 PHASED ARRAY NONIUS ENCODER 26-256 Rev B2, Page 7/7 ORDERING INFORMATION Type Package Options Order Designation iC-PN2656 - iC-PN2656 chip 15-pin optoBGA, 6.2 mm x 5.2 mm, thickness 1.7 mm iC-PN2656 oBGA LSH2C 32-pin optoQFN, 5 mm x 5 mm, thickness 0.9 mm iC-PN2656 oQFN32-5x5 Suitable code discs 255/256/240 PPR LSHC4S 26-256N OD ∅ 26 mm, ID ∅ 11.6 mm, optical radius 10.905 mm (glass 1 mm) 255/256/240 PPR LSHC5S 26-256N OD ∅ 26 mm, ID ∅ 7 mm, optical radius 10.905 mm (plastic 1.15 mm) 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