HEDS-1200 Datasheet, PDF (3/8 Pages) Agilent(Hewlett-Packard) – Optical Reflective Sensors

Absolute Maximum Ratings @ T_A = 25°C
Parameter
Symbol HEDS-
Storage Temperature
Ts
1200
1300
Operating Temperature
T_A
1200
1300
Lead Soldering Temperature
1.6 mm from Seating Plane
1200
1300
Average LED Forward
Current
If
1200
1300
Peak LED Forward Current
Ifpk
1200
1300
Reverse LED Input Voltage
Vr
1200
1300
Photodiode Bias
(Id = 100 µA max)
Vd
1200
1300
Min.
- 40
- 40
-20
-20
10
- 0.3
- 0.3
Max.
+75
+75
+70
+70
260°C
for 10 sec.
40
50
40
75
2.5
5.0
20
20
Units
°C
°C
°C
°C
mA
mA
mA
mA
V
V
V
V
Fig. Notes
1
1
3
2
7
4
7
4
5
5
Notes:
1. Caution: The thermal constraints of the acrylic lens will not permit the use of conventional wave soldering procedures. The typical
preheat and post-cleaning temperatures and dwell times can subject the lens to thermal stresses beyond the absolute maximum ratings
and can cause it to defocus.
2. Derate Maximum Average Current linearly from 65°C by 6 mA/°C [HEDS-1300 only].
3. Non-linear effects make operation of the HEDS-1200 below 10 mA not advisable.
4. 1 KHz pulse rate, 300 mS pulse width.
5. All voltages referenced to Pin 4.
System Electrical/Optical Characteristics @ T_A = 25°C
Parameter
Symbol HEDS- Min. Typ. Max. Units Conditions
Fig. Notes
Reflected
Photocurrent
Ipr
1200 150 280 650 nA If = 35 mA, Vd = 0 1A, 2, 6 6
1300 150 280 650 nA See Binning Table 1B, 2, 6 6
Quality Factor
<Q> 1200 0.82 0.95 1.0
1300 0.82 0.95 1.0
If = 35 mA
1A
6, 7
1B
6, 7
Ipr Temperature
Ke
1200
- 0.005
1/°C If = 35 mA
8
Coefficient
1300
- 0.01
1/°C
8
System Optical Step
d
1200
0.13
mm
Response Size (OSR)
1300
0.19
mm
9A
9
9B
9
Maximum Signal
Point (MSP)
Zm
1200 4.01 4.27 4.62 mm Measured from
4
1300 4.01 4.27 4.52 mm Reference Plane
4
Effective Numerical
N.A.
1200
0.3
Aperture of
1300
0.3
Detector Lens
Notes:
6. Measured from a reflector coated with 99% diffuse reflective white paint (Kodak 6080) positioned 4.27 mm (0.168 in.) from the
sensor’s reference plane. Measured physically is the total photocurrent, Ipt, which consists of a signal (reflected from target)
component, Ipr, and a component induced by reflections internal to the sensor (stray), Ips. Ipr = Ipt - Ips.
7. <Q> = Ipr/Ipt
8. Photocurrent variation with temperature follows a natural exponential law: Ip(T) = Ip(To)*exp[Ke(T-To)]
9. OSR size is defined as the distance for the 10%-90% “step” response of Ipr as the sensor moves over an abrupt black-white edge,
or from opaque white to free space (no reflection).
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