Datasheet

REF02
Rev. I | Page 10 of 16
OUTPUT ADJUSTMENT
The REF02 trim terminal can be used to adjust the output
voltage over a 5 V ± 300 mV range. This feature lets the system
designer trim system errors by setting the reference to a voltage
other than 5 V. The output also can be set to exactly 5.00 V or to
5.12 V for binary applications.
Adjustment of the output does not significantly affect the
temperature performance of the device. The temperature
coefficient change is approximately 0.7 ppm/°C for 100 mV of
output adjustment.
U1
REF02
V
IN
V
OUT
TEMP
TRIM
GND
V
IN
V
O
pot
10kΩ
R2
1kΩ
R1
470kΩ
00375-027
Figure 14. Output Adjustment Circuit
00375-F-014
V
IN
GND
–18V
+18V
4
2
REF02
Figure 15. Burn-In Circuit
00375-F-015
V
IN
GND
REF02
V
O
TRIMTEMP
0.1µF
5kΩ
OP02
10kΩ
10kΩ
+15V
–15V
+15V
+5V
–5V
4
53
6
2
Figure 16. ±5 V Reference
00375-F-016
REF02
R1
5.6kΩ
R2
5.6kΩ
2
+5V
4
6
2
OP02
–
+
3
4
6
7
–9V
V
REF
V
O
+
+2.5V
+V
O
–2.5V
V
O
+ =
(V
REF
),
R1
R1 + R2
V
O
– =
(V
REF
)
R2
R1 + R2
Figure 17. ±2.5 V Reference