Datasheet

LT6010
11
sn6010 6010fs
APPLICATIO S I FOR ATIO
WUUU
Offset Voltage Adjustment
The input offset voltage of the LT6010 and its drift with
temperature are permanently trimmed at wafer testing to
the low level as specified in the electrical characteristic.
However, if further adjustment of V
OS
is desired, nulling with
a 50k potentiometer is possible and will not degrade drift
with temperature. Trimming to a value other than zero
+
–
6010 F01a
3
2
1
8
LT6010INPUT OUTPUT
V
CC
V
ee
50k
4
6
7
+
–
6010 F02a
3
2
1
8
LT6010
10k
50k
10k
4
6
7
INPUT OUTPUT
V
CC
V
ee
POTENTIOMETER POSITION
0 0.2 0.4 0.6 0.8 1.0
CHANGE IN OFFSET VOLTAGE (mV)
6010 F01b
1.0
0.8
0.6
0.4
0.2
0
–0.2
–0.4
–0.6
–0.8
–1.0
POTENTIOMETER POSITION
0
1.0
CHANGE IN OFFSET VOLTAGE (µV)
6010 F02b
–200
200
150
100
50
0
–50
–100
–150
0.2 0.4 0.6 0.8
Standard Adjustment
Improved Sensitivity Adjustment
Figure 1A Figure 1B
Figure 2A Figure 2B
creates a drift of (V
OS
/300µV) µV/°C, e.g., if V
OS
is adjusted
to 300µV, the change in drift will be 1µV/°C. The adjustment
range with a 50k pot is approximately ±0.9mV (see Figures
1A and 1B). The sensitivity and resolution of the nulling can
be improved by using a smaller pot in conjunction with fixed
resistors. The configuration shown has an approximate
nulling range of ±150µV (see Figures 2A and 2B).