am336-2 AME, Inc., am336-2 Datasheet - Page 4

• Manufacturer Part Number: am336-2
• Description: Ic For Opto Detector - Analog Microelectronics
• Manufacturer: AME, Inc.

IC FOR OPTO DETECTOR
FUNCTIONAL DIAGRAM
FUNCTIONAL DESCRIPTION
GENERAL:
The AM 336 is designed for proximity and barrier applications with the possibility of external
synchronisation (mode selection by Pin P/B).
The circuit contains different functional modules.
Oscillator:
Oscillator thresholds refer to VCC/2, driver output for IR–LED, emitting–pulse length and duty
cycle adjusted by external components RO and CO.
Amplifier:
Current to voltage converter, ambient light rejection.
analog microelectronics
Figure 1: Functional circuit
Co
Cin
Ra
Ro
Ca
+
FO
P/B
IND
OUTA
ALR
INA
GN
Rtd1
+
+
+
Rb
+
Rtd2
C
D
Re
Rin
PROXIMITY
IRD
VR
BARRIER
RH
Rta
Rtb
VTB
VTA
I(Rd,Rh)
RD
A
B
Rd
Rh
+
D Q
D Q
+
+
T
FFA
FFB
:128
B
+
A
VCC
T1
VZ
:4
generatation
short circuit
pulse
T2
CSC
Csc
SC
A
B
+
T1
VS
A B SC LED
X X
L
L H
H H
L H
T2
current
regulation
H
L
H
T1
T2
L
H
+
+
+
AM 336
LED
QC
QO
RS
February 2005
Rs
+
+
4/12