he epc134/epc135/epc136/epc137/epc138/epc139 photo-receiver amplifier general description the epc13x family products are monolithic, integrated high sensi - tive photo-diode amplifiers for light-barrier, light-curtain, and the like applications. it amplifies current pulses from reverse-biased pin photodiodes (e.g. bp104 by osram) and discriminates the amplified input light pulse before driving the open-drain output stage. the device is controlled by an internal digital controller, which uses no external clock signal. the power supply of the device can be connected in anti-polar mode to decrease the wiring effort in matrix ope rated light-curtain products. the device has been optimized to uti lize the least count of external components. this device allows the design of short to long range light barriers from a few millimeters up to tens of meters. epc130/epc131 are the same devices but with an analog output. please refer to the corresponding data sheet epc130/epc131. features ? low current consumption ? digital output ? reverse polarity protection ? two-wire and open drain output interface ? high sensitivity (epc135/138) ? fast versions available (epc136/139) ? light reserve output (epc135/136) ? high sensitivity and light reserve output (epc134) ? csp6 package with very small footprint and standard qfn16 pack - age available applications ? light barriers ranging from millimeters to tens of meters ? light curtains ? smoke detectors ? liquid detectors ? heart beat monitors device selection table model output digital analog w/o fast high epc130 x x x epc131 x x x epc134 x x x x epc135 x x x x epc136 x x x x epc137 x x x x epc138 x x x x epc139 x x x x light reserve output response time sensitivity with slow low medium very high functional block diagram signal processor out amp pd cn controller vss ? 2011 espros photonics corporation characteristics subject to change without notice 1 datasheet epc13x digital - v2.1 www.espros.ch
he epc134/epc135/epc136/epc137/epc138/epc139 absolute maximum ratings (notes 1, 2) recommended operating conditions power supply voltage v dd voltage to any pin maximum power dissipation storage temperature range (t s ) lead temperature solder, 4 sec. (t l ) -5.5v to +5.5v -0.3 to v dd +0.3v 300mw -40c to +85c +260c power supply voltage (v dd ) operating temperature (t a ) humidity min. 4.0 -40 +5 max. 5.2 +85 +95 units v c % note 1: absolute maximum ratings indicate limits beyond which damage to the device may occur. recommended operating conditions indic - ate conditions for which the device is intended to be functional, but do not guarantee specific performance limits. for guaranteed specifica - tions and test conditions, see electrical characteristics. note 2: this device is a highly sensitive cmos ac current amplifier with an esd rating of jedec hbm class 0 (<250v). handling and as - sembly of this device should only be done at esd protected workstations. electrical characteristics v dd = 5.0 v, -40c < t a < +85c symbol parameter conditions/comments values units min. typ. max. v pp ripple on supply voltage epc135 epc138 sinusoidal 100khz, refer to other parameters 40 mv pp epc137 22 epc136 epc139 sinusoidal 800khz, refer to other parameters 110 epc134 45 i dd power supply current all slow no photo diode current 0.45 0.50 ma all fast 0.75 0.80 v pd reversed photodiode voltage relative to vdd vdd- 1.55 v i pd input pulse threshold (sensitivity) epc137 photodiode current pulse to generate an output pulse 40 na epc135 epc138 60 80 100 na epc134 200 400 600 na epc136 epc139 600 800 1000 na i pdres input pulse threshold re - serve epc134 - epc137 input pulse current relative to i pd to trigger the light re - serve output 150 % i pdmax input pulse current if input current is above this level, recovery time t rec is undefined (refer to section 'other parameters') 100 a i pddc dc light current range refer to section 'application information, ambient light' 0.0 3.0 ma c pd photodiode capacitance epc135 epc137 epc138 refer to section 'application information, photodiode capacitance' 15 50 pf epc134 epc136 epc139 30 40 i out output current (sink) when a light pulse above the threshold is detected -6.0 -8.0 -10.0 ma v por power-up threshold voltage the voltage at vdd when the device starts up and the startup time is running. 3.0 3.5 4.0 v v ipor hysteresis on power-up threshold voltage 0.5 0.75 1.0 v t init power-up startup time vdd slew rate >100v/ms 1.5 ms t off power-down time 1.5 ms ? 2011 espros photonics corporation characteristics subject to change without notice 2 datasheet epc13x digital - v2.1 www.espros.ch
he epc134/epc135/epc136/epc137/epc138/epc139 sym - bol parameter conditions/comments values units min. typ. max. t rec recovery time epc135 epc137 epc138 after the reception of a pulse current (100na he epc134/epc135/epc136/epc137/epc138/epc139 connection diagrams top view 6 5 4 1 2 3 vss pd cn out vn vdd pin connections qfn16-veed- 1vn4 lst top view 26.05.2011 page 1 file: this document is confidential and protected by law and international trades. it must not be shown to any third party nor be copied in any form without our written permission . 1 2 3 4 5 6 7 8 9 10 11 12 1 3 1 4 1 5 1 6 6-pin chip scale package (csp) 16-pin qfn package 6-pin csp 16-pin qfn pin name description 1 16 out open drain pull down output pin. the output transistor is active if a photo-current signal is detected. please note that there is no internal pull-up resistor. 2 3 vn negative power supply pin through a reverse-polarity protection diode. 3 13 vdd positive power supply pin. 4 8 cn external capacitor for background light current regulator. 5 11 pd anode of photo diode. this is the analog input of the amplifier/filter circuitry. 6 5 vss negative power supply pin. n/a 1 nc not connected. n/a 2 nc not connected. n/a 4 nc not connected. n/a 6 nc not connected. n/a 7 nc not connected. n/a 9 nc not connected. n/a 10 nc not connected. n/a 12 nc not connected. n/a 14 nc not connected. n/a 15 nc not connected. . ? 2011 espros photonics corporation characteristics subject to change without notice 4 datasheet epc13x digital - v2.1 www.espros.ch
he epc134/epc135/epc136/epc137/epc138/epc139 other parameters (typical values, t amb = 25c, v dd = 5.0v) 0 2 4 6 8 10 12 14 16 0.0 0.2 0.4 0.6 0.8 1.0 1.2 epc135/epc138 emitting pulse length (s) r e l a t i v e s e n s i t i v i t y 1e+04 1e+05 1e+06 1e+07 1.0 10.0 100.0 1000.0 epc135/epc138 frequency (hz) m a x . r i p p l e v o l t a g e o n v d d ( m v p p ) max. ripple voltage on vdd until output is triggered 0.4 0.5 0.6 0.7 0.8 0.9 1 1.1 0.0 0.2 0.4 0.6 0.8 1.0 1.2 epc136/epc139 emitting pulse length (s) r e l a t i v e s e n s i t i v i t y 1e+04 1e+05 1e+06 1e+07 1e+08 1.0 10.0 100.0 1000.0 10000.0 100000.0 epc136/epc139 frequency (hz) m a x . r i p p l e v o l t a g e o n v d d ( m v p p ) max. ripple voltage on vdd until output is triggered ? 2011 espros photonics corporation characteristics subject to change without notice 5 datasheet epc13x digital - v2.1 www.espros.ch
he epc134/epc135/epc136/epc137/epc138/epc139 0.4 0.5 0.6 0.7 0.8 0.9 1 1.1 0.0 0.2 0.4 0.6 0.8 1.0 1.2 epc134 emitting pulse length (s) r e l a t i v e s e n s i t i v i t y 1e+04 1e+05 1e+06 1e+07 1.0 10.0 100.0 1000.0 10000.0 epc134 frequency (hz) m a x . r i p p l e v o l t a g e o n v d d ( m v p p ) max. ripple voltage on vdd until output is triggered 0 2 4 6 8 10 12 14 16 0.0 0.2 0.4 0.6 0.8 1.0 1.2 epc137 emitting pulse length (s) r e l a t i v e s e n s i t i v i t y 1e+04 1e+05 1e+06 1e+07 1.0 10.0 100.0 1000.0 epc137 frequency (hz) m a x . r i p p l e v o l t a g e o n v d d ( m v p p ) max. ripple voltage on vdd until output is triggered ? 2011 espros photonics corporation characteristics subject to change without notice 6 datasheet epc13x digital - v2.1 www.espros.ch
he epc134/epc135/epc136/epc137/epc138/epc139 functional description power-up sequence if v dd reaches v por , the startup sequence is initiated. after the time t del , the photo diode bias circuit is enabled. thus, a current generated by light on the photo diode flows into the pin pd. after the time tinit, the device is ready to receive ac light pulses. v dd v por t init startup period ready out false pulses may occur power-up sequence power-down sequence when vdd goes down, the device is turned off when v dd is below v por minus v ipor . v dd v por - v ipor t off pd bias power-down sequence light pulse reception a light pulse on the photo diode generates a current puls into the pin pd of the device. if the current pulse exceeds the threshold i pd , an output pulse is generated. the length of the output pulse is given by t out . after a waiting time given by t rec , the next light pulse can be sent. if the waiting time is too short, the device is not ready to receive the next pulse. thus, no output pulse is appears at pin out. ir led pulse t ir led t pd pd signal out signal t out t rec t out t out 2 nd pulse indicates light reserve threshold triggered light pulse reception ? 2011 espros photonics corporation characteristics subject to change without notice 7 datasheet epc13x digital - v2.1 www.espros.ch
he epc134/epc135/epc136/epc137/epc138/epc139 application information light barrier application the following circuit is recommended to operate the epc134/135/136/137/138/139 as a photo diode amplifier in a single beam light barrier: d2 c1 r1 epc13x pd cn out vn vss vdd type t1 r2 gnd led from digital oscillator or c output +vled d1 c2 c3 digital output to logic, plc or c light path recommended components values r1: 27k(epc135/137/138), 6.8k(epc134) and 4.7k (epc136/139) (bias resistor). sensitivity can be reduced by the reduction of this resistor. r2: dependent on the required led current c1: usually not needed. may be up to 100 pf (refer to section 'photodiode capacitance'). c2: 33nf (dc input current filter capacitor) c3: 100nf or greater (power supply filter capacitor) d1: pin photo diode, bp104 (osram) or similar devices d2: ir led, tsml1000 (vishay) or similar devices working principle the ir led d2 emits light pulses which are sent towards the photo diode d1. if there is no obstacle between the two devices, the light pulse generates an ac current (i pd ) in the reverse biased photo diode d1 into the pin pd. i pd is proportional to the power of the light pulse. if i pd is greater than the trigger threshold of the circuitry in the device, a pulse at the pin out is generated. if i pd is greater than the trigger threshold for the light reserve (i pdres ), a second pulse at the output is generated. the length of the output pulse is given by t out . once a light pulse is gen - erated by the ir led, a next light pulse must not be generated until the recovery time t rec (max.). design precautions the sensitivity at pin pd is very high in order to achieve a long operation range of light barriers even without lenses in front of the ir led and/or the photo diode. thus, the pin pd is very sensitive to emi. special care should be taken to keep the pcb track at pin pd as short as possible (a few mm only!). this track should be kept away from the ir led signal tracks and from other sources which may induce unwanted signals. it is strongly recommended to cover the chip, the photodiode and all passive components around the chip with a metal shield. a recommended part is shown in the following figure: t he pins at the bottom are to solder the shield to the pcb with electrical connection to vdd. the hole in the front is the opening window for the photo diode. the back side of the pcb below the sensitive area (d1, c1, r1, epc13x) shall be a polygon connected to vdd to shield the circuit from the back side. c1 must be of high mechanical stability (no piezoelectric effect) in order to avoid unwanted signals by mechanical shock or vibration. ambient light photodiode dc current can be generated by ambient light, e.g. sun light. dc currents at pin pd do not generate an output signal. however, if i pddc is above the stated value, the input is saturated which blocks the detection of ac current pulses. photodiode capacitance if the photodiode capacitance is below the specified value, the system becomes more sensitive to power supply ripple voltage at higher fre - quencies (>200khz). this sensitivity can be reduced by a parallel capacitor to the photodiode. however, this measure reduces the detection sensitivity. if the photo diode capacity is above the specified value, a lower detection sensitivity and a higher sensitivity spread results. ? 2011 espros photonics corporation characteristics subject to change without notice 8 datasheet epc13x digital - v2.1 www.espros.ch recommended emc shield
he epc134/epc135/epc136/epc137/epc138/epc139 layout information (all measures in mm, m 1:1 din a4 part name part no. designed approved scale page t h i s d o c u m e n t i s c o n f i d e n t i a l a n d p r o t e c t e d b y l a w a n d i n t e r n a t i o n a l t r a d e s . i t m u s t n o t b e s h o w n t o a n y t h i r d p a r t y n o r b e c o p i e d i n a n y f o r m w i t h o u t o u r w r i t t e n p e r m i s s i o n . file: unbenannt 1 26.02.2009 ) csp-6 package mechanical dimensions layout recommendations 0.43 0.43 0 . 5 6 ? 0.12 1.4 +0.0/-0.1 1 . 0 + 0 . 0 / - 0 . 1 0 . 3 0 . 1 4 0 . 0 1 solder balls sn97.5ag2.5 pin 1 0.43 0.43 0 . 5 6 ? 0.3 1.98 1 . 5 6 no solder mask inside this area 0.1524 qfn-16 package mechanical dimension qfn16 package lst mechanical dimension sot23-6l lst top view 2 . 9 - 3 . 1 0.3 2.9 - 3.1 0 . 1 - 0 . 2 1.9 0.25 01.02.2010 page 1 file: unbenannt this document is confidential and protected by law and international trades. it must not be shown to any third party nor be copied in any form without our written permission . 0.5 0 . 9 0 . 0 2 bottom view 0 . 2 5 1 . 9 ? 2011 espros photonics corporation characteristics subject to change without notice 9 datasheet epc13x digital - v2.1 www.espros.ch
he epc134/epc135/epc136/epc137/epc138/epc139 reflow solder profile for infrared or conventional soldering the solder profile has to follow the recommendations of ipc/jedec j-std-020c (min. revision c) for pb-free assembly for both types of packages. the peak soldering t emperature (t l ) should not exceed +260c for a maximum of 4 sec. packaging information (all measures in mm) tape & reel information the devices are mounted on embossed tape for automatic placement systems. the tape is wound on 178 mm (7 inch) or 330 mm (13 inch) reels and individually packaged for shipment. g eneral tape-and-reel specification data are available in a separate data sheet and indicate the tape sizes for various package types. further tape-and-reel specifications can be found in the electronic industries association (eia) standard 481-1, 481-2, 481-3. pin 1 8 pin 1 1 2 8 2 csp6 tape qfn16 tape pin 1 8 pin 1 1 2 8 4 csp6 tape qfn16 tape epc does not guarantee that there are no empty cavities. thus, the pick-and-place machine should do check the presence of a chip during picking. order information part number package rohs compliance packaging method epc134-csp6 csp6 yes reel epc134-qfn16 qfn16 yes reel epc135-csp6 csp6 yes reel epc135-qfn16 qfn16 yes reel epc136-csp6 csp6 yes reel epc136-qfn16 qfn16 yes reel EPC137-CSP6 csp6 yes reel epc137-qfn16 qfn16 yes reel epc138-csp6 csp6 yes reel epc138-qfn16 qfn16 yes reel epc139-csp6 csp6 yes reel epc139-qfn16 qfn16 yes reel ? 2011 espros photonics corporation characteristics subject to change without notice 10 datasheet epc13x digital - v2.1 www.espros.ch
he epc134/epc135/epc136/epc137/epc138/epc139 important notice espros photonics ag and its subsidiaries (epc) reserve the right to make corrections, modifications, enhancements, improvements, and other changes to its products and services at any time and to discontinue any product or service without notice. customers should obtain the latest relevant information before placing orders and should verify that such information is current and complete. all products are sold subject to epcs terms and conditions of sale supplied at the time of order acknowledgment. epc warrants performance of its hardware products to the specifications applicable at the time of sale in accordance with epcs standard war - ranty. testing and other quality control techniques are used to the extent epc deems necessary to support this warranty. except where man - dated by government requirements, testing of all parameters of each product is not necessarily performed. epc assumes no liability for applications assistance or customer product design. customers are responsible for their products and applications using epc components. to minimize the risks associated with customer products and applications, customers should provide adequate design and operating safeguards. epc does not warrant or represent that any license, either express or implied, is granted under any epc patent right, copyright, mask work right, or other epc intellectual property right relating to any combination, machine, or process in which epc products or services are used. in - formation published by epc regarding third-party products or services does not constitute a license from epc to use such products or services or a warranty or endorsement thereof. use of such information may require a license from a third party under the patents or other intellectual property of the third party, or a license from epc under the patents or other intellectual property of epc. resale of epc products or services with statements different from or beyond the parameters stated by epc for that product or service voids all express and any implied warranties for the associated epc product or service. epc is not responsible or liable for any such statements. epc products are not authorized for use in safety-critical applications (such as life support) where a failure of the epc product would reasonably be expected to cause severe personal injury or death, unless officers of the parties have executed an agreement specifically governing such use. buyers represent that they have all necessary expertise in the safety and regulatory ramifications of their applications, and acknowledge and agree that they are solely responsible for all legal, regulatory and safety-related requirements concerning their products and any use of epc products in such safety-critical applications, notwithstanding any applications-related information or support that may be provided by epc. further, buyers must fully indemnify epc and its representatives against any damages arising out of the use of epc products in such safety- critical applications. epc products are neither designed nor intended for use in military/aerospace applications or environments unless the epc products are spe - cifically designated by epc as military-grade or "enhanced plastic." only products designated by epc as military-grade meet military specifica - tions. buyers acknowledge and agree that any such use of epc products which epc has not designated as military-grade is solely at the buyer's risk, and that they are solely responsible for compliance with all legal and regulatory requirements in connection with such use. epc products are neither designed nor intended for use in automotive applications or environments unless the specific epc products are desig - nated by epc as compliant with iso/ts 16949 requirements. buyers acknowledge and agree that, if they use any non-designated products in automotive applications, epc will not be responsible for any failure to meet such requirements. ? 2011 espros photonics corporation characteristics subject to change without notice 11 datasheet epc13x digital - v2.1 www.espros.ch
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