TYPICAL APPLICATIONS
CURRENT SOURCE MIRROR
CURRENT SOURCE WITH GATE CONTROL
+
V
= +5V
+
V
= +5V
+
V
= +5V
M
M
4
3
M
M
4
3
I
R
SET
SET
Digital Logic Control
of Current Source
I
R
SET
SET
I
SOURCE
R
SOURCE
ON
I
R
SOURCE
SOURCE
M
1
M
1
M
2
OFF
M1:
M3, M4:
ALD1102,
ALD1117,
1/2 ALD1103,
1/2 ALD1105,
1/2 ALD1101,
1/2 ALD1116,
1/2 ALD1109xx,
1/2 ALD2129xx,
1/4 ALD1103,
1/4 ALD1105,
1/4 ALD1106,
M1, M2:
ALD1101,
ALD1116,
ALD1109xx,
ALD2129xx,
1/2 ALD1103,
1/2 ALD1105,
1/2 ALD1106,
1/2 ALD1108xx, or
1/2 ALD2108xx
M3, M4:
ALD1102,
ALD1117,
1/2 ALD1103,
1/2 ALD1105,
1/2 ALD1107, or
1/2 ALD3107xx
+
R
V
- Vt
SET
I
= I
SET
=
SOURCE
1/2 ALD1107, or
1/2 ALD3107xx
where Vt = V
GS
- V
= V
GS(th)
DS
1/4 ALD1108xx, or
1/4 ALD2108xx
M , M : N - Channel MOSFET
1
2
M
: N - Channel MOSFET
: P - Channel MOSFET
1
M , M : P - Channel MOSFET
3
4
M
3,
M
4
CURRENT SOURCE MULTIPLICATION
DIFFERENTIAL AMPLIFIER
+
+
V
= +5V
V
= +5V
Package N
+
V
Package 1
R
I
R
SET
SOURCE
SET
I
= I x N
SET
SOURCE
PMOS PAIR
NMOS PAIR
M
M
3
4
M
M
M
3
M
M
N
1
2
SET
V
V
OUT
-
+
V
IN
IN
M
2
M
1
MSET, M1..MN:
N x ALD1101, N x ALD1116,
N x ALD1109xx, N x ALD2129xx,
N x ALD1103, N x ALD1106,
N x ALD1108xx, or
M1, M2:
ALD1101,
ALD1116,
ALD1109xx,
ALD2129xx,
1/2 ALD1103,
1/2 ALD1105,
1/2 ALD1106,
1/2 ALD1108xx, or
1/2 ALD2108xx
Current
Source
M3, M4:
ALD1102,
ALD1117,
1/2 ALD1103,
1/2 ALD1105,
1/2 ALD1107, or
1/2 ALD3107xx
N x ALD2108xx
All M's in the set are
from the same part number.
M , M : N - Channel MOSFET
1 2
M , M : P - Channel MOSFET
3 4
M
M ..M : N - Channel MOSFET
1 N
SET,
ALD212908A/ALD212908
Advanced Linear Devices
9 of 12
ALD [ ADVANCED LINEAR DEVICES ]
