+VS
100µA
IOUT
5
4
50µA
In
Out
Mirror
Com
3
100µA
–VS
FIGURE 3. 50µA Current Source.
300µA
400µA
200µA
100µA
100µA
100µA
100µA
5
4
100µA
100µA
In
Out
5
4
In
Out
Mirror
Mirror
Com
3
Com
3
Compliance = 4V
Compliance = 4V
(a)
(b)
(c)
FIGURE 4. 200µA, 300µA, and 400µA Floating Current Sources.
Compliance to
Ground
+VS
+VS
Compliance to
–VS + 5V
Compliance to
–VS + 5.1V
50µA
100µA
27kΩ
50µA
50µA
5
4
In
Out
5
4
Mirror
In
Out
5
4
Com
3
Mirror
In
Out
Mirror
Com
3
0.01µF
Com
3
100µA
5.1V
1N4689
100kΩ
100µA
100µA
–VS
(a)
–VS
–VS
(b)
(c)
FIGURE 5. 50µA Current Sinks.
®
6
REF200
BB [ BURR-BROWN CORPORATION ]
