IC-PD3948 ICHAUS | Alldatasheet
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Technical content
5-CHAN. PHASED ARRAY SINE ENCODER 39-2048 Rev B4, Page 1/9
FEATURES
♦ 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)
APPLICATIONS
♦ 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 /g1/g2/g1 /g1/g3/g4 /g5 /g1/g3/g6/g7/g8 /g1/g3/g8/g9/g2 /g1/g2/g4 /g1/g3/g6 /g1/g2/g6/g7/g8 /g1/g2/g6/g7/g8 /g1/g3/g1 /g1/g2/g6 /g1/g2/g8/g9/g2 /g10/g11/g12/g13 /g11/g12/g13/g12/g11/g12/g2/g6/g12 /g14 /g1/g3/g1 /g1/g2/g4 /g5 /g14 /g14 /g3/g6 /g5 /g14 /g10/g6/g6 /g3/g1 /g3/g6/g7/g8 /g4 /g14 /g5 /g14 /g14 /g14 /g3/g8/g9/g2 /g14 /g5 /g14 /g2/g6/g7/g8 /g10/g11/g1/g6 /g10/g7/g15/g16/g17/g18/g12 /g14 /g5 /g14 /g1/g2/g1 /g2/g1 /g18/g2/g1 /g1/g2/g6 /g5 /g1/g3/g6 /g5 /g14 /g10/g11/g8/g6 /g2/g4 /g1/g2/g8/g9/g2 /g5 /g5 /g5 iC-PD3948 /g2/g8/g9/g2 /g1/g3/g8/g9/g2 /g5 /g2/g6 /g1/g3/g4 /g1/g3/g6/g7/g8 /g5 Copyright © 2009 iC-Haus http://www.ichaus.com
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 Mil-
livolts are obtained at illumination levels of just 1 to 3 mW/cm 2. In most cases complicated noise sup- pression measures are thus rendered unnecessary. As the pin names would suggest, iC-PD3948 is typ- ically 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 res- olution of 1 PPR (at C/D). All code disc signal tracks are evaluated differentially; the high resolution sine signals are read by photo- diodes 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 iC- PD 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
2 VREF Reference Voltage Output
3 PSIN Sine Track +
4 NSIN Sine Track -
5 PCOS Cosine Track +
6 NCOS Cosine Track -
7 Z Z Index Signal
8 NZ Z Index Track -
9 ND D Track -
10 PD D Track +
11 NC C Track -
12 PC C Track +
13 VRDC D/C Track Reference
14 VRSC S/C Track Reference
15 GND Ground
Notes: All outputs are analog voltage outputs.
5-CHAN. PHASED ARRAY SINE ENCODER 39-2048 Rev B4, Page 3/9 PIN CONFIGURATION oQFN32-5x5, oQFN32-N5x5 (5 mm x 5 mm) dra_pdxx-oqfn32-n_pack_2, 10:1 9 10 11 12 13 14 15 16 32 31 30 29 28 27 26 25 PIN FUNCTIONS No. Name Function 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 CONFIGURATION oBGA LSH2C (6.2 mm x 5.2 mm) dra_lsh2c-pdxx_pack_2, 8:1 1 2 3 4 A B C D PIN FUNCTIONS No. Name Function A3 VREF Reference Voltage Output A4 GND Ground B1 PSIN Sine Track + B2 NSIN Sine Track - B3 VRDC D/C Track Reference B4 VRSC S/C Track Reference C1 PCOS Cosine Track + C2 NCOS Cosine Track - C3 NC C Track - C4 PC C Track + D1 Z Z Index Signal D2 NZ Z Index Track - D3 ND D Track - D4 PD D Track +
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 Symbol Parameter Conditions Unit No. 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 HBM, 100 pF discharged through 1.5 kΩ 2 kV G006 Tj Junction Temperature -40 150 °C G007 Ts Chip Storage Temperature -40 150 °C THERMAL DATA Item Symbol Parameter Conditions Unit No. Min. Typ. Max. T01 Ta Operating Ambient Temperature Rangepackage oBGA LSH2C -40 110 °C package oQFN32-N5x5 -40 110 °C package oQFN32-5x5* -40 110 °C (extended temperature range on request) T02 Ts Storage Temperature Range package oBGA LSH2C, -40 110 °C package oQFN32-N5x5, oQFN32-5x5* T03 Tpk Soldering Peak Temperature package oBGA LSH2C 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. T04 Tpk Soldering Peak Temperature package oQFN32-N5x5, oQFN32-5x5* 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.
5-CHAN. PHASED ARRAY SINE ENCODER 39-2048 Rev B4, Page 5/9
ELECTRICAL CHARACTERISTICS
Item Symbol Parameter Conditions Unit No. Min. Typ. Max. Total Device 001 VCC Permissible Supply Voltage 4.5 5.5 V 002 I(VCC) Supply Current no load, photocurrents within op. range 12 16 mA
003 Vc()hi Clamp-Voltage hi at all pinsI() = 4 mA 11 V
004 Vc()lo Clamp-Voltage lo at all pinsI() = -4 mA -1.2 -0.3 V Photosensors 101 λar Spectral Application Range Se(λar) = 0.25 x S(λ)max 400 950 nm 102 λpk Peak Sensitivity Wavelength 680 nm 103 Aph() Radiant Sensitive Area DPSIN, DNSIN, DPCOS, DNCOS 0.075 mm 2 DPC, DNC, DPD, DND 0.033 mm 2 DPZ, DNZ 0.042 mm 2 104 S(λ) Spectral Sensitivity λLED = 740 nm 0.5 A/W 105 S(λpk)max Maximum Spectral SensitivityλLED = λpk 0.55 A/W
106 E()mx Irradiance For Maximum Signal
λLED = 740 nm, Vout() not saturated DPSIN, DNSIN, DPCOS, DNCOS 1.2 2.0 3.2 mW/ cm 2 DPC, DNC, DPD, DND 3.0 4.5 6.5 mW/ cm 2 DPZ, DNZ 2.8 4.2 6.0 mW/ cm 2 Photocurrent Amplifiers
201 Iph() Permissible Photocurrent Operat-
202 η()r Photo Sensitivity (light-to-voltage conversion ratio) λLED = 740 nm 0.8 1.2 2.0 V/µW 203 Z() Equivalent Transimpedance GainZ = Vout() / Iph() 2.69 4.0 5.46 M Ω
204 TCz Temperature Coefficient of Tran-
-0.12 %/°C 209 ∆Z()pn Transimpedance Gain Matching Of Paired Amplifiers 210 ∆Vout()pnSignal Matching no illumination, any output to any output-35 35 mV 211 ∆Vout()pnSignal Matching no illumination, P vs. N path per diff. channel-2.5 2.5 mV 212 fc()hi Cut-off Frequency (-3 dB) 120 180 280 kHz
213 VNoise() RMS Output Noise illuminated to 500 mV signal level above dark
level, 500 kHz band width 0.5 mV Signal Outputs
301 Vout()mx Permissible Maximum Output
illumination to E()mxr, linear gain 2.45 2.72 3.02 V 302 Vout()d Dark Signal Level no illumination, load 20 kΩ vs. +2 V 600 770 1000 mV 303 Vout()acmxMaximum Signal Level Vout()acmx = Vout()mx - Vout()d 1.48 1.96 2.35 V
304 Isc()hi Short-Circuit Current hi load current to ground 100 420 800 µA
305 Isc()lo Short-Circuit Current lo load current to IC 250 480 700 µA
306 Ri() Internal Output Resistance 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
5-CHAN. PHASED ARRAY SINE ENCODER 39-2048 Rev B4, Page 6/9 Item Symbol Parameter Conditions Unit No. Min. Typ. Max. Reference Voltages VREF 501 Vout() Reference Voltage I(VREF) = 0...+1.6 mA 600 770 1000 mV 502 dVout() Load Balancing I(VREF) = 0...+1.6 mA -10 +10 mV
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
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 websitewww.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.
5-CHAN. PHASED ARRAY SINE ENCODER 39-2048 Rev B4, Page 9/9
ORDERING INFORMATION
Type Package Options Order Designation 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 PD2S 39-2048 For technical support, information about prices and terms of delivery please contact: iC-Haus GmbH Tel.: +49 (61 35) 92 92-0 Am Kuemmerling 18 Fax: +49 (61 35) 92 92-192 D-55294 Bodenheim Web: http://www.ichaus.com GERMANY E-Mail: sales@ichaus.com Appointed local distributors:http://www.ichaus.com/sales_partners