TYPICAL APPLICATIONS (cont.)
BASIC CURRENT SOURCES
N-CHANNEL CURRENT SOURCE
P-CHANNEL CURRENT SOURCE
+
+
V
= +5V
V
= +5V
R
I
1/2 ALD1105
SET
SET
I
SOURCE
Q
Q
Q
3
4
Q
2
1
I
SOURCE
I
R
SET
1/2 ALD1105
SET
+
+
4
V
- Vt
V
- 1.0
SET
~
=
~
=
I
= I
=
SET
SOURCE
R
SET
R
SET
R
Q
Q
: N - Channel MOSFET
2
Q , Q : P - Channel MOSFET
1,
3
4
CASCODE CURRENT SOURCES
+
+
V
= +5V
V
= +5V
I
R
SET
SET
I
SOURCE
Q
Q
2
1
Q
4
Q
3
Q
3
Q
I
4
Q
Q
1
2
I
R
SET
SOURCE
SET
+
V
- 2Vt
SET
3
~
=
I
= I
=
SET
SOURCE
R
R
SET
Q , Q , Q , Q : N - Channel MOSFET
Q1, Q2, Q3, Q4: P - Channel MOSFET
(1/2 ALD1105 + ALD1117)
1
2
3
4
(1/2 ALD1105 + ALD1116)
ALD1105
Advanced Linear Devices
6 of 9
ALD [ ADVANCED LINEAR DEVICES ]
