EPC137-CSP6 EPC [Espros Photonics corp], EPC137-CSP6 Datasheet - Page 7

• Manufacturer Part Number: EPC137-CSP6
• Description: Photo-receiver Amplifier
• Manufacturer: EPC [Espros Photonics corp]

He
Functional Description
Power-up Sequence
If V
light on the photo diode flows into the pin PD. After the time tINIT, the device is ready to receive AC light pulses.
Power-down Sequence
When VDD goes down, the device is turned off when V
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
pulse is generated. The length of the output pulse is given by t
waiting time is too short, the device is not ready to receive the next pulse. Thus, no output pulse is appears at pin OUT.
© 2011 ESPROS Photonics Corporation
Characteristics subject to change without notice
DD
reaches V
IR LED Pulse
POR
Out Signal
PD Signal
, the startup sequence is initiated. After the time t
Startup
PD bias
Period
Out
V
V
DD
DD
T
IR LED
T
PD
t
OUT
t
OFF
V
V
POR
POR -
t
epc134/epc135/epc136/epc137/epc138/epc139
DD
OUT
is below V
V
Power-down sequence
IPOR
Light pulse reception
Power-up sequence
t
OUT
Out
. After a waiting time given by t
t
POR
REC
DEL
minus V
, the photo diode bias circuit is enabled. Thus, a current generated by
7
t
INIT
2
reserve threshold triggered
nd
pulse indicates light
IPOR
.
false pulses may occur
REC
Ready
, the next light pulse can be sent. If the
Datasheet epc13x digital - V2.1
www.espros.ch
PD
, an output