preliminary iC-PD3948 5-CHAN. PHASED ARRAY SINE ENCODER 39-2048 Rev B4, Page 1/9 FEATURES APPLICATIONS ♦ Compact encoder sensor with differential scanning and sine outputs ♦ Phased-array design for 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 QFN 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 ♦ Code disc available (2048 PPR +C/D 1 PPR, diameter ∅39 mm) ♦ Incremental sine encoders with commutation information ♦ Motor feedback encoder ♦ AC and BLDC motor systems PACKAGES 32-pin optoQFN 15-pin optoBGA Chip 2.88 mm x 3.37 mm BLOCK DIAGRAM )%% )*+, 1! iC-PD3948 *+,+*+!%+ - )&./01+ $ "'(! - "'(! "# - $ !'(! - !'(! "% - $ "%&' - !% "%&' "% "'(! - "%&' !'(! "% $ !%&' !% - !% $ " - - !%&' $ # )* % $ $ !%&' )*'% $ "# " $ - " ! $ !# $ Copyright © 2009 iC-Haus !# ! !# - ! $ http://www.ichaus.com preliminary iC-PD3948 5-CHAN. PHASED ARRAY SINE ENCODER 39-2048 Rev B4, Page 2/9 DESCRIPTION iC-PD3948 is an optical sensor IC with integrated photodiodes whose signal currents are converted into output voltages by low-noise transimpedance amplifiers. Due to a high transimpedance gain of typically 4 MΩ, output signal voltages of several hundred Millivolts are obtained at illumination levels of just 1 to 3 mW/cm2 . In most cases complicated noise suppression measures are thus rendered unnecessary. As the pin names would suggest, iC-PD3948 is typically applied as a sine encoder for motor feedback systems. To this end, iC-PD3948 provides sine and cosine signals with both a high resolution of 2048 PPR (plus an additional index signal) and a low resolution of 1 PPR (at C/D). All code disc signal tracks are evaluated differentially; the high resolution sine signals are read by photodiodes in a phased array. The layout of the signal amplifiers is such that there is good paired channel matching, reducing the time and effort required for calibration to an absolute minimum. The spectral sensitivity ranges from visible to near infrared light, with the maximum sensitivity close to a wavelength of 680 nm. An output voltage of 1 V is typical in low light conditions, for instance when iCPD is illuminated at only 2 mW/cm2 by a 740 nm LED. A relatively low LED current is enough to operate the sensor, proving beneficial to the life expectancy of the LED at high operating temperatures. PACKAGES AND CHIP LAYOUT 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 PSIN NSIN PCOS NCOS Z NZ ND PD NC PC VRDC VRSC GND +4.5...5.5 V Supply Voltage Reference Voltage Output Sine Track + Sine Track Cosine Track + Cosine Track Z Index Signal Z Index Track D Track D Track + C Track C Track + D/C Track Reference S/C Track Reference Ground Notes: All outputs are analog voltage outputs. preliminary iC-PD3948 5-CHAN. PHASED ARRAY SINE ENCODER 39-2048 Rev B4, Page 3/9 PIN CONFIGURATION oQFN32-5x5, oQFN32-N5x5 (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 9 10 11 12 13 14 15 16 dra_pdxx-oqfn32-n_pack_2, 10:1 PIN CONFIGURATION oBGA LSH2C (6.2 mm x 5.2 mm) 1 2 3 PIN FUNCTIONS No. Name Function 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 VCC VREF PSIN NSIN PCOS NCOS Z NZ ND PD NC PC VRDC VRSC GND +4.5...5.5 V Supply Voltage Reference Voltage Output Sine Track + Sine Track Cosine Track + Cosine Track Z Index Signal Z Index Track D Track D Track + C Track C Track + D/C Track Reference S/C Track Reference 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. PIN FUNCTIONS No. Name Function 4 A B C D dra_lsh2c-pdxx_pack_2, 8:1 A2 A3 A4 B1 B2 B3 B4 C1 C2 C3 C4 D1 D2 D3 D4 VCC VREF GND PSIN NSIN VRDC VRSC PCOS NCOS NC PC Z NZ ND PD +4.5...5.5 V Supply Voltage Reference Voltage Output Ground Sine Track + Sine Track D/C Track Reference S/C Track Reference Cosine Track + Cosine Track C Track C Track + Z Index Signal Z Index Track D Track D Track + preliminary iC-PD3948 5-CHAN. PHASED ARRAY SINE ENCODER 39-2048 Rev B4, Page 4/9 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 Ta Operating Ambient Temperature Range package oBGA LSH2C package oQFN32-N5x5 package oQFN32-5x5* T02 Ts Storage Temperature Range package oBGA LSH2C, package oQFN32-N5x5, oQFN32-5x5* T03 Tpk Soldering Peak Temperature package oBGA LSH2C Unit Min. Typ. Max. -40 -40 -40 110 110 110 °C °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-N5x5, 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-PD3948 5-CHAN. PHASED ARRAY SINE ENCODER 39-2048 Rev B4, Page 5/9 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 no load, photocurrents within op. range 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 12 5.5 V 16 mA 11 V -0.3 V 950 nm Photosensors 101 λ ar Spectral Application Range 102 103 λ pk Peak Sensitivity Wavelength Aph() Radiant Sensitive Area DPSIN, DNSIN, DPCOS, DNCOS DPC, DNC, DPD, DND DPZ, DNZ 104 S(λ ) Spectral Sensitivity 105 106 S(λ pk)max Maximum Spectral Sensitivity E()mx λ LED = 740 nm, Vout() not saturated DPSIN, DNSIN, DPCOS, DNCOS 1.2 2.0 3.2 DPC, DNC, DPD, DND 3.0 4.5 6.5 DPZ, DNZ 2.8 4.2 6.0 Irradiance For Maximum Signal Level 680 nm 0.075 0.033 0.042 mm2 mm2 mm2 λ LED = 740 nm 0.5 A/W λ LED = λ pk 0.55 A/W mW/ cm2 mW/ cm2 mW/ cm2 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 Of Paired Amplifiers 210 ∆Vout()pn Signal Matching no illumination, any output to any output 211 ∆Vout()pn Signal Matching no illumination, P vs. N path per diff. channel 212 fc()hi Cut-off Frequency (-3 dB) 213 VNoise() RMS Output Noise illuminated to 500 mV signal level above dark level, 500 kHz band width 280 nA 1.2 2.0 V/µW 4.0 5.46 -0.12 P.. channel vs. corresponding N.. channel -0.2 MΩ %/°C 0.2 % -35 35 mV -2.5 2.5 mV 280 kHz 120 180 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 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 Signal References VRSC, VRDC 401 Vout() Reference Voltage 600 770 1000 mV 402 Isc()hi Short-Circuit Current hi current to ground 100 420 800 µA 403 Isc()lo Short-Circuit Current lo current to IC 250 480 700 µA 404 Ri() Internal Output Resistance 70 110 180 Ω preliminary iC-PD3948 5-CHAN. PHASED ARRAY SINE ENCODER 39-2048 Rev B4, Page 6/9 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. 770 1000 mV +10 mV Reference Voltages VREF 501 Vout() Reference Voltage I(VREF) = 0...+1.6 mA 600 502 dVout() Load Balancing I(VREF) = 0...+1.6 mA -10 503 Isc()hi Short-Circuit Current hi current to ground 200 420 800 µA 504 Isc()lo Short-Circuit Current lo current to IC 2 4.5 10 mA iC-PD3948 preliminary 5-CHAN. PHASED ARRAY SINE ENCODER 39-2048 Rev B4, Page 7/9 APPLICATION CIRCUITS iC-MSB Disc iC-PD3948 iC-MSB Figure 1: Application example motor feedback encoder iC-MSB Disc iC-TW3 iC-PD3948 Figure 2: Application example motor feedback encoder iC-PD3948 preliminary 5-CHAN. PHASED ARRAY SINE ENCODER 39-2048 Rev B4, Page 8/9 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-PD3948 5-CHAN. PHASED ARRAY SINE ENCODER 39-2048 Rev B4, Page 9/9 ORDERING INFORMATION Type Package Options iC-PD3948 - iC-PD3948 chip 32-pin optoQFN, 5 mm x 5 mm x 0.9 mm (backside paddle exposed) iC-PD3948 oQFN32-5x5 32-pin optoQFN 5 mm x 5 mm x 1.4 mm iC-PD3948 oQFN32-N5x5 15-pin optoBGA 6.2 mm x 5.2 mm iC-PD3948 oBGA LSH2C Code Disc 2048+1 PPR OD/ID ∅39/13 mm Order Designation PD2S 39-2048 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