EPC100-CSP10 [EPC]
Light-Curtain Device with 2-Wire Bus Interface; 光帘装置，带有2线总线接口
| 型号： | EPC100-CSP10 |
| 厂家： | 
ESPROS PHOTONICS CORP |
| 描述： | Light-Curtain Device with 2-Wire Bus Interface |
| 文件： | 总9页 (文件大小：409K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
epc100
Light-Curtain Device with 2-Wire Bus Interface
General Description
Feature
The epc10x chip set is a general purpose CMOS integrated circuit
for light-curtain applications. epc100 is used on the receiver side
(Rx) whereas epc 101 is on the emitter side (Tx). Up to 1023
devices may be connected to two respectively four wires in paral-
lel. Each device can be individually addressed by an epc100 chip
which acts as the interface between a microcontroller and the 2-
wire bus. It manages the bus traffic between the microcontroller
and the individual Rx and Tx elements. Programmable fuses i.e.
for the address, sensitivity, LED light pulse width, etc. allow the
device to be parametrized in the final system (OTP memory).
Light pulse receiver
Bus transceiver
Advantageous wiring by communication over the power-supply lines
High sensitive input for photo-diode current signals, typ. 60nA
Scan period down to 30 µs
integrated clock generator
CSP10 package with very small footprint and standard QFN16 pack -
age available
Applications
Each chip can be put into 'standby mode' or 'operating mode' to re-
duce power consumption. During 'standby mode', power consump-
tion is reduced and the photo diode is shorted.
Light barriers ranging from millimeters to tens of meters
Light curtains
Smoke detectors
Liquid detectors
Refer to the separate Data Sheet of the epc101 transmitter chip
and to the Reference Manual epc10x for implementation, usage
and configuration information.
Functional Block Diagram
VDD
2-wire COM
Interface
Parameter
Memory
VDD33
Processor
VDD18
PD
SPI
Signal
Controller
Processor
f
D1
CS
SI
GND
SO
SC
© 2011 ESPROS Photonics Corporation
Characteristics subject to change without notice
1
Datasheet epc100 - V2.1
www.espros.ch
epc100
Absolute Maximum Ratings (Notes 1, 2)
Recommended Operating Conditions
Voltage to any pin except VDD
-0.3V to VDD+0.3 V
Min.
4.5
Max.
5.5
Units
Supply Voltage on 2-wire bus VDD
Programming Voltage on 2-wire bus VDD
Power Supply Voltage VDD33
-0.3V to +8.0V
-0.3V to +8.0V
-0.3V to +5.5V
-6mA to +6 mA
125mW
Operating Voltage on 2-wire bus VDD
Programming Voltage on VDD
V
V
V
7.0
8.0
Operating Supply Voltage VDD33
3.0
3.6
Input current at any pin except LED
Power consumption with maximum load
Storage Temperature Range (TS)
Lead Temperature solder, 4 sec. (TL)
-55°C to +155°C
+260°C
Operating Temperature (TO)
-40°
+5
+85
+95
°C
%
Relative Humidity (non-condensing)
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
VDD = 5.0 V, -40°C < TA < +85°C, if not otherwise specified
Symbol
Parameter
Conditions/Comments
Values
Typ.
Units
Min.
Max.
VPP Ripple on supply voltage, peak to peak
2-wire interface Vdet
Input pulse IPD NST
36nA
---
70
150
350
600
1.4
2.0
mV
mV
mV
mV
mA
mA
50mV
100mV
200mV
48nA
72nA
108nA
IDD_IDLE Current consumption
IDD_OP Current consumption
in idle mode
in operation mode IPD = 0 mA
Vdet Detection level for 2-wire interface
50
200
9.8
mV
mA
IMOD Modulation current for 2-wire interface
IPDDC DC Photo Diode Current
6.4
8.0
90
generated by ambient light
2
mA
nA
IPD NST Input Pulse Threshold (Photo Current Photodiode current pulse to generate an output signal
24
108
Sensitivity)
(only OUT=1), configurable (refer to the Reference
Manual epc10x)
IPD RST Input Pulse Threshold (Photo Current Photodiode current pulse to generate an output signal
nA
µA
Sensitivity)
(OUT=1 & OUTH=1)
IPulse Maximum Input Pulse Current
If the input current is above this level, the TRelax is un-
defined (refer to section 'Other Parameters')
100
TPulse LED pulse length
TRelax Relaxation time
IN_Imin Input related noise
IN_Imax Input related noise
1
10
50
15
20
µs
µs
After a strong current pulse (Ipulse = 100µA)
@ IPDDC =0
7
nARMS
nARMS
MHz
%
@ IPDDC =IPDDC Max
fclk
Reference clock
Internal oscillator
32
7
dfclk Temperature drift of the oscillator
VPUP Power-up Threshold Voltage
The voltage at VDD33 when the device starts up
2.4
3
VDD
V
VIH
VIL
High level input voltage
Low level input voltage
0.7 *VDD
GND
V
0.3 *VDD
10
V
ILEAKD Input leakage current
VOH Output high voltage
VOL Output low voltage
ISCK/LED Source current
µA
V
@ 4mA sink except pin SCK/LED
@ 4mA source
VDD- 0.5
0.5
1.3
V
@ PIN SCK / LED
0.7
0.1
30
mA
V
VHist Schmitt Trigger Hysteresis
RPU Pull-Up Resistor
200
kΩ
© 2011 ESPROS Photonics Corporation
Characteristics subject to change without notice
2
Datasheet epc100 - V2.1
www.espros.ch
epc100
Connection Diagrams
2 1
1 1
0 1
9
9
8
7
6
VDD33
EN/
SI
LED/
SCK
OUTN/
SO
AOUT/
OUTH
Top View
10 VDD18
Top View
5
VDD
1
GND
2
PD
3
CS
4
1
2
4
3
10-Pin Chip Scale Package (CSP)
16-Pin QFN Package
10-Pin 16-Pin
PIN Name
Type
Description
CSP
QFN
1
2
3
4
5
9
7
6
4
2
VDD
GND
PD
Power supply Positive power supply for regulator and positive terminal of the 2-wire interface.
Power supply Negative power supply pin.
Analog Input Photo diode input.
CS
Digital Input
SPI Interface: Chip Select. Active low, with pull up
AOUT
OUTH
Analog Out
Digital Out
Amplified and filtered signal of the photo diode (push-pull) or
light reserve output (open drain) with 50 % threshold voltage above the threshold of the
OUT output.
6
7
8
9
1
SO
SI
Digital Output SPI Interface: Serial out
15
14
12
Digital Input
Digital Input
SPI Interface: Serial input
SPI Interface: Shift Clock
SCK
VDD33
Power supply Positive power supply for analog and digital. If the the device is supplied by V DDR, a
Decoupling
power supply filter capacitor is connected to this pin.
1.8 V regulator output. Do not use this pin, except for a decoupling capacitor.
Not connected. Connect this pin with VSS.
10
n/a
n/a
n/a
n/a
n/a
n/a
10
3
VDD18
NC
NC
NC
NC
NC
NC
Analog Out
5
Not connected. Connect this pin with VSS.
8
Not connected. Connect this pin with VSS.
11
13
16
Not connected. Connect this pin with VSS.
Not connected. Connect this pin with VSS.
Not connected. Connect this pin with VSS.
© 2011 ESPROS Photonics Corporation
Characteristics subject to change without notice
3
Datasheet epc100 - V2.1
www.espros.ch
epc100
Other Parameters
(typical values, Tamb = 25°C, VDD = 5.0V)
120
110
100
90
80
70
60
50
40
0
1
2
3
4
5
6
Pulse width [us]
Figure 1: Input Sensitivity vs. LED pulse length
Threshold
Threshold
OUTH
OUTN
OUTH
OUTN
OUTN
OUTH
OUTN
OUTH
Figure 2: OUTN and OUTH threshold operation
Figure 3: Typical light curtain receiver edge circuit
© 2011 ESPROS Photonics Corporation
Characteristics subject to change without notice
4
Datasheet epc100 - V2.1
www.espros.ch
epc100
Overview Functional Description
Light Curtain Receiver in a 2-Wire Configuration
ITE
VDD
RTE
Rx Element 1
Rx Element 2
Rx Element n
VDD
VDD
VDD
VDD
epc100
epc100
epc100
epc100
VDD µC
VDD33
VDD33
VDD33
VDD33
I
R
R
R
n
F
1
2
PD
PD
PD
SI
VDD18
VDD18
VDD18
SO
SCK
µC
CS
GND
GND
GND
GND
GND
Figure 4: Typical light curtain receiver edge circuit
The epc100 device can be operated in two different modes:
a) Photo Current Receivers
It detects current pulses of the photo diode generated by light pulses and transmits the information using the 2-wire bus to a central con-
troller, i.e. a micro controller. The devices operating as this photo current receivers are designated in the schematic diagram above as R1 to
Rn.
b) 2-Wire Bus Interface of the Central Controller
It manages the 2-wire bus traffic between the micro controller and the individual photo current receivers. The device operating as the inter-
face unit is designated as IF.
From the point of view of the micro controller, the whole system looks like a single device with several addressable photo diodes. The micro
controller activates one photo diode and fetches the results after a predefined time. Each sensor device has two different operation modes: A
standby and an operating mode. During the standby mode the power consumption is reduced and the DC current generated in the photo di -
ode is shorted. During the operation mode, the micro controller addresses one device after the other and fetches the result. The result con-
tains the information whether a light pulse has been received in a predefined receive window or not. It also contains the time point when the
light pulse has been received in respect to the receive window.
The receiver channel detects current pulses which are generated by light pulses in the photo diodes. The detection circuitry has two trigger
levels, hereinafter called thresholds, which form a digital signal from the analog current change. The lower threshold is called OUTN (normal)
whereas the upper level is called OUTH (high). Both trigger thresholds can be configured individually per chip. Please refer to Figure 2 and to
the Reference Manual epc10x which contains the configuration information.
© 2011 ESPROS Photonics Corporation
Characteristics subject to change without notice
5
Datasheet epc100 - V2.1
www.espros.ch
epc100
Application Information
Schematic Circuit of one Node
Figure 5 shows the schematic circuit of one node on a light curtain system. A node consists of four components only: The receiver chip ep-
c100, a photo diode and two supply voltage decoupling capacitors.
2-wire bus: positive terminal
VDD
epc100
VDD33
PD
VDD18
GND
C1
C2
PD
2-wire bus: negative terminal
Figure 5: Schematic circuit of one node
Recommended Components Values
PD: PIN photo diode, i.e., epc300, epc310, epc320, epc330 (refer to the separate available data sheet epc3xx), or similar
C1: 100nF ceramic capacitor
C2: 4.7nF ceramic capacitor
Design Precautions
The sensitivity at pin PD is very high in order to achieve a long operation range of light curtains 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 to the photo diode as short as possible (a few mm only!). This track should be kept
away from sources emitting electromagnetic noise which may induce unwanted signals. It is strongly recommended to
cover the chip and the photodiode with a metal shield. A recommended part is shown in Figure 6.
The pins at the bottom are to solder the shield to the PCB with electrical connection to GND. The hole in the front is
the opening window for the photo diode. The back side of the PCB below the sensitive area (PD, epc100) shall be a
polygon connected to GND to shield the circuit from the back side. The capacitors shall be of high mechanical stability
(no piezoelectric effect) in order to avoid unwanted voltage modulation by mechanical shock or vibration.
Figure 6: Recommen-
ded EMC shield
Ambient Light
Photodiode DC current is generated by ambient light, e.g. sun light. DC currents at pin PD do not generate an output signal. However, if I
is above the stated value, the input is saturated which blocks the detection of AC current pulses.
PDDC
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
6
Datasheet epc100 - V2.1
www.espros.ch
epc100
Layout Information (all measures in mm,
)
CSP-10 Package
Mechanical Dimensions
Layout Recommendations
1.9 +0.0/-0.1
0.1524
∅ 0.12
Bottom View
∅ 0.3
Pin 1
0.5
0.5
Solder balls Sn97.5Ag2.5
0.15
0.5
0.5
2.5
no solder mask inside this area
QFN-16 Package
1.9
Bottom View
Top view
0.5
0.25
2.9 - 3.1
0.3
© 2011 ESPROS Photonics Corporation
Characteristics subject to change without notice
7
Datasheet epc100 - V2.1
www.espros.ch
epc100
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
Pin 1
4
8
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.
Ordering Information
Part Number
Package
CSP10
QFN16
CSP10
QFN16
RoHS compliance
Packaging Method
epc100-CSP10
epc100-QFN16
epc101-CSP10
epc101-QFN16
Yes
Yes
Yes
Yes
Reel
Reel
Reel
Reel
© 2011 ESPROS Photonics Corporation
Characteristics subject to change without notice
8
Datasheet epc100 - V2.1
www.espros.ch
epc100
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
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
9
Datasheet epc100 - V2.1
www.espros.ch
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