DS3920 Maxim, DS3920 Datasheet - Page 4

• Manufacturer Part Number: DS3920
• Description: The DS3920 precision current mirror is designed for avalanche photodiode (APD) and PIN photodiode biasing and monitoring applications
• Manufacturer: Maxim

(T
A
= +25°C, unless otherwise noted.)
A
B
A: CH1, 1V/div, I
A: CH2; 5V/div, I
TRANSIENT RESPONSE
(V
MIRIN
MIROUT
MIR
500ns/div
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= 75µA TO 1.5mA
= 40V)
CH1
CH2
= 375µA TO 7.5mA
0V
0V
5kΩ
CH2
MIR
100kΩ
CH1: 2V/div
CH2: 2V/div
MIRIN
D.U.T
40V
(V
MIROUT
DS3920 toc07
MIRIN
CH1
5kΩ
STARTUP DELAY
= 5V, I
200µs/div
MIROUT
CH1
CH2
5kΩ
0V
0V
R2
Typical Operating Characteristics (continued)
CH1
MIR
= 1µA)
MIRIN
D.U.T
5V
CH1: 20V/div
CH2: 20V/div
MIROUT
DS3920 toc10
(V
CH2
R1
4.6MΩ
BIAS
STARTUP DELAY
= 40V, I
200µs/div
MIROUT
CH1
CH2
5kΩ
R2
0V
0V
CH1
MIR
= 1µA)
MIRIN
D.U.T
40V
MIROUT
DS3920 toc08
CH1: 2V/div
CH2: 2V/div
(V
CH2
R1
38MΩ
MIRIN
Fast Current Mirror
STARTUP DELAY
= 5V, I
200µs/div
MIROUT
CH1
CH2
0V
0V
5kΩ
R2
= 2.5mA)
CH1
CH1: 20V/div
CH2: 20V/div
(V
MIR
MIRIN
D.U.T
MIRIN
5V
MIROUT
DS3920 toc11
CH2
R1
1.7kΩ
STARTUP DELAY
= 40V, I
200µs/div
MIROUT
DS3920
5kΩ
R2
CH1
MIR
= 2.5mA)
D.U.T
MIRIN
40V
MIROUT
DS3920 toc09
CH2
R1
15.6kΩ