EPC EPC134-QFN16 Photo-receiver amplifier Datasheet

He
epc134/epc135/epc136/epc137/epc138/epc139
Photo-receiver Amplifier
General Description
Features
The epc13x family products are monolithic, integrated high sensitive 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 operated light-curtain products. The device has
been optimized to utilize 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.
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
epc130/epc131 are the same devices but with an analog output. 
Please refer to the corresponding data sheet epc130/epc131.




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
Light
Reserve
Output
w/o
epc130
x
x
epc131
x
x
with
Response
Time
slow
fast
Sensitivity
low
medium
high
very
high
x
x
epc134
x
x
x
epc135
x
x
epc136
x
x
epc137
x
x
x
epc138
x
x
x
epc139
x
x
x
x
x
x
x
x
x
x
x
Functional Block Diagram
OUT
PD
AMP
SIGNAL
PROCESSOR
CN
CONTROLLER
© 2011 ESPROS Photonics Corporation
Characteristics subject to change without notice
1
VSS
Datasheet epc13x digital - V2.1
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He
epc134/epc135/epc136/epc137/epc138/epc139
Absolute Maximum Ratings (Notes 1, 2)
Recommended Operating Conditions
Power Supply Voltage V DD
-5.5V to +5.5V
Voltage to Any pin
-0.3 to VDD +0.3V
Min.
Max.
Units
Power Supply Voltage (V DD)
4.0
5.2
V
Maximum Power Dissipation
300mW
Storage Temperature Range (T S)
Lead Temperature solder, 4 sec. (T L)
-40°C to +85°C
Operating Temperature (T A)
-40°
+85°
C
+260°C
Humidity
+5
+95
%
Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Recommended operating conditions indicate conditions for which the device is intended to be functional, but do not guarantee specific performance limits. For guaranteed specifications 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
VDD = 5.0 V, -40°C < T A < +85°C
Symbol
Parameter
Conditions/Comments
Values
Min.
VPP
Ripple on Supply Voltage
epc135
epc138
Typ.
Sinusoidal 100kHz, refer to other parameters
40
Sinusoidal 800kHz, refer to other parameters
110
epc137
epc136
epc139
Power Supply Current
VPD
Reversed Photodiode Voltage
IPD
Input Pulse Threshold
(Sensitivity)
IPDres
Input Pulse Threshold Reserve
IPDmax
Input Pulse Current
IPDDC
DC Light Current Range
CPD
Photodiode Capacitance
45
All slow no photo diode current
0.45
0.50
All fast
0.75
0.80
relative to VDD
epc137
mVpp
22
epc134
IDD
Units
Max.
Photodiode current pulse to generate an output pulse
mA
VDD1.55
V
40
nA
epc135
epc138
60
80
100
nA
epc134
200
400
600
nA
epc136
epc139
600
800
1000
nA
epc134 - Input pulse current relative to I PD to trigger the light reepc137 serve output
150
If input current is above this level, recovery time t REC is
undefined (refer to section 'Other Parameters')
epc135
epc137
epc138
%
100
μA
refer to section 'Application Information, Ambient Light'
0.0
3.0
mA
refer to section 'Application Information, Photodiode
Capacitance'
15
50
pF
30
40
epc134
epc136
epc139
IOUT
Output Current (sink)
When a light pulse above the threshold is detected
-6.0
-8.0
-10.0
mA
VPOR
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
VIPOR
0.5
0.75
1.0
V
1.5
ms
1.5
ms
Hysteresis
on Power-up Threshold Voltage
tINIT
Power-up Startup Time
VDD slew rate >100V/ms
tOFF
Power-down Time
© 2011 ESPROS Photonics Corporation
Characteristics subject to change without notice
2
Datasheet epc13x digital - V2.1
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epc134/epc135/epc136/epc137/epc138/epc139
Symbol
tREC
Parameter
Recovery Time
Conditions/Comments
epc135
epc137
epc138
epc134
epc136
epc139
tOUT
Output Pulse Width at pin
OUT
epc135
epc137
epc138
Input Pulse Width at pin PD
epc135
epc137
epc138
epc134
epc136
epc139
trf
Input pulse slew rate
epc135
epc137
epc138
Max.
After the reception of a pulse current
(100nA<IPD<100μA) at pin PD until a next pulse can
be detected. It is to note that a higher input current
pulse may lead to a secondary output pulse and thus
a longer recovery time.
80
110
130
When a valid pulse at pin PD is detected.
17
22
28
1.5
2.0
2.5
Current pulse width at pin PD necessary to generate
an output pulse at pin OUT. The input sensitivity is de pendent on the input current pulse width (refer to the
section Applications and Other Parameters).
maximum rise and fall time of the current pulse at pin
PD in order to achieve the stated sensitivity.
epc134
epc136
epc139
RPD
Photodiode bias resistor
© 2011 ESPROS Photonics Corporation
Characteristics subject to change without notice
epc135
epc137
epc138
Units
Typ.
epc134
epc136
epc139
tPD
Values
Min.
μs
25
6
μs
μs
0.75
500
ns
50
refer to section 'Application Information, Photodiode
Resistor'
27
epc134
6.8
epc136
epc139
4.7
3
kΩ
Datasheet epc13x digital - V2.1
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epc134/epc135/epc136/epc137/epc138/epc139
Connection Diagrams
12
8
4
11
5
10
CN
13
6
PD
9
VSS
7
14
Top View
6
15
Top View
OUT
3
VN
5
2
16
1
VDD
1
6-Pin Chip Scale Package (CSP)
2
3
4
16-Pin QFN Package
6-Pin
CSP
16-Pin
QFN
Pin
Name
Description
1
16
OUT
2
3
VN
3
13
VDD
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. .
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.
Negative power supply pin through a reverse-polarity protection diode.
Positive power supply pin.
PIN Connections QFN16-VEED1VN4
LST
26.05.2011
Page 1
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© 2011 ESPROS Photonics Corporation
Characteristics subject to change without notice
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Datasheet epc13x digital - V2.1
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epc134/epc135/epc136/epc137/epc138/epc139
Other Parameters
(typical values, T amb = 25°C, VDD = 5.0V)
epc135/epc138
1.2
1.0
Relative Sensitivity
Relative Sensitivity
1.0
0.8
0.6
0.4
0.2
0.8
0.6
0.4
0.2
0.0
0.0
2
1000.0
4
6
8 10 12 14
Emitting Pulse Length (μs)
16
0.4
epc135/epc138
Max. Ripple Voltage on VDD(mVpp)
0
Max. Ripple Voltage on VDD(mVpp)
epc136/epc139
1.2
100.0
10.0
1.0
1E+04
100000.0
0.5
0.6 0.7 0.8 0.9
1
Emitting Pulse Length (μs)
1.1
epc136/epc139
10000.0
1000.0
100.0
10.0
1E+07
1.0
1E+04 1E+05 1E+06 1E+07 1E+08
Frequency (Hz)
Max. ripple voltage on VDD until output is triggered
Max. ripple voltage on VDD until output is triggered
1E+05
1E+06
Frequency (Hz)
© 2011 ESPROS Photonics Corporation
Characteristics subject to change without notice
5
Datasheet epc13x digital - V2.1
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epc134/epc135/epc136/epc137/epc138/epc139
epc134
1.2
1.0
Relative Sensitivity
1.0
Relative Sensitivity
epc137
1.2
0.8
0.6
0.4
0.2
0.8
0.6
0.4
0.2
0.0
0.0
0.4
0.5
0.6
0.7
0.8
0.9
1
1.1
0
2
10000.0
epc134
Max. Ripple Voltage on VDD(mVpp)
Max. Ripple Voltage on VDD(mVpp)
Emitting Pulse Length (μs)
1000.0
100.0
10.0
1.0
1E+04
1E+05
1E+06
Frequency (Hz)
1E+07
Max. ripple voltage on VDD until output is triggered
© 2011 ESPROS Photonics Corporation
Characteristics subject to change without notice
1000.0
4
6
8 10 12 14
Emitting Pulse Length (μs)
16
epc137
100.0
10.0
1.0
1E+04
1E+05
1E+06
Frequency (Hz)
1E+07
Max. ripple voltage on VDD until output is triggered
6
Datasheet epc13x digital - V2.1
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epc134/epc135/epc136/epc137/epc138/epc139
Functional Description
Power-up Sequence
If VDD reaches VPOR, 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.
VDD
VPOR
Startup
Period
Ready
tINIT
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 VPOR minus VIPOR.
VDD
VPOR - VIPOR
PD bias
tOFF
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 tREC, 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.
TIR LED
IR LED Pulse
T
PD
PD Signal
Out Signal
tOUT
tOUT
2nd pulse indicates light
reserve threshold triggered
tOUT
t
REC
Light pulse reception
© 2011 ESPROS Photonics Corporation
Characteristics subject to change without notice
7
Datasheet epc13x digital - V2.1
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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:
+VLED
Light path
D2
D1
C1
C3
R1
VDD
PD
OUT
epc13x
Type
T1
from digital
oscillator or
μC output
VN
CN
C2
digital output
to logic, PLC
or μC
VSS
R2
GND LED
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 (IPDres), a second pulse at the output is generated. The length of the output pulse is given by t OUT. Once a light pulse is generated 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:
The 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.
Recommended EMC
shield
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
IPDDC 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
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
.
He
epc134/epc135/epc136/epc137/epc138/epc139
Layout Information (all measures in mm,
)
CSP-6 Package
Mechanical Dimensions
Layout Recommendations
∅ 0.12
Designed
Approved
Scale
Page
Part Name
0.1524
<Name>
26.02.2009
<Name>
<Data>
M 1:1
DIN A4
1
Part No.
<x000 000>
<Partname>
∅ 0.3
0.43
1.56
0.56
solder balls
Sn97.5Ag2.5
0.3
1.4 +0.0/-0.1
Pin 1
0.14 ±0.01
0.43
1.0 +0.0/-0.1
0.56
File: Unbenannt
0.43
0.43
1.98
no solder mask inside this area
QFN-16 Package
Bottom View
0.25
Top view
1.9
2.9 - 3.1
1.9
0.5
0.1-0.2
0.02
0.9
2.9 - 3.1
0.25
LST
Mechanical dimension QFN16 Package
0.3
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 .
© 2011 ESPROS Photonics Corporation
Characteristics subject to change without notice
9
Datasheet epc13x digital - V2.1
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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 (TL) should not exceed +260°C 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. General 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.
CSP6 Tape
QFN16 Tape
Pin 1
12
8
Pin 1
2
8
epc does not guarantee that there are no empty cavities.
CSP6
QFN16
Tape
Thus,Tape
the pick-and-place machine
the presence
of a chip during
Pin 1 should do check
Pinpicking.
1
8
Order Information
Package
RoHS compliance
Packaging Method
CSP6
Yes
Reel
QFN16
Yes
Reel
epc135-CSP6
CSP6
Yes
epc135-QFN16
QFN16
Yes
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
epc134-QFN16
© 2011 ESPROS Photonics Corporation
Characteristics subject to change without notice
4
10
12
Part Number
epc134-CSP6
Reel
8
Reel
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 epc’s 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 epc’s 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
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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
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Datasheet epc13x digital - V2.1
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