2 / 2 page
VO = Log (IIN) + 4
2
+ 4VC + ß (IIN)
Anti-Log
Element
X4
0.875V
3.56KΩ
∑
Output
9
2
Input
10
-10
10
-9
10
-8
10
-7
10
-6
10
-5
10
-4
10
-3
0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
2 5
2 5
2 5
2 5
2 5
2 5
2 5
2
5
Input Current (Amperes)
OUTPUT VOLTAGE
vs.
INPUT CURRENT/OPTICAL POWER
-70
-60
-50
-40
-30
-20
-10
0
-70
-60
-50
-40
-30
-20
-10
0
Optical Input Power (dBm)
VC
7
4
VREF
+5V
1.25V
REF.
VO
6
8
3
5
VDD
+5V
VEE
-5V
IIN
GND. GND.
1.25 Volts
Calibration
Adjustment
10KΩ
6.81KΩ
FUNCTIONAL BLOCK
DIAGRAM OT THE
DN135
EQUATION RELATING THE OUTPUT
VOLTAGE OF THE DN135 TO THE
INPUT CURRENT.
VO = Log (IIN)
2
+ 5.5 + ß (IIN)
When VC = 0.875 V
IIN is in Amperes
or
Input
Current
Amperes
Volts
1
100
10
1
100
10
1
mA
µ
A
µ
A
µ
A
nA
nA
nA
100
pA
4.000
3.500
3.000
2.500
2.000
1.500
1.000
0.500
Output
Voltage
1
+0.012
±
0.002
±
0.000
±
0.001
±
0.002
±
0.002
±
0.002
±
0.005
Volts
Output
Voltage Tol.
1. This is the output voltage after the DN135 has been
calibrated to produce an output voltage of 3.000
Volts with an input current of 10µA at an ambient
temperature of 25°C.
1
OUTPUT VOLTAGE VS.
INPUT CURRENT FOR THE DN135
T= 25°C
T= 25°C
+0.024
±
0.010
±
0.010
±
0.010
±
0.010
±
0.010
±
0.020
±
0.150
Volts
Output
Voltage Tol.
1
T= -20°C
to +75°C
ß =0.010 ± .002
at 25°C. The effect
of ß on the output
voltage is very small
when the input current
is less than 100µA.
™
Page 2
Last Updated 6/25/01
1004 Mallory Way • Carson City, NV 89701 • Phone: 702-882-7721 • Fax: 702-882-7675 • E-mail: info@thermoptics.com • http://www.thermoptics.com
English ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
