5
Application Information
NOTE:
Tested Offset Adjustment Range is |VOS + 1mV| minimum referred to output. Typical range is ±4mV with RP = 10k.
FIGURE 3. SUGGESTED OFFSET VOLTAGE ADJUSTMENT
NOTE: Low resistances are preferred for low noise applications as a 1k
resistor has 4nV/√Hz of thermal noise. Total resistances of greater than
10k
on either input can reduce stability. In most high resistance applications, a few picofarads of capacitance across the feedback resistor will
improve stability.
FIGURE 4. SUGGESTED STABILITY CIRCUITS
Typical Performance Curves Unless Otherwise Specied: TA = 25oC, VSUPPLY = ±15V
FIGURE 5. OFFSET VOLTAGE DRIFT vs TEMPERATURE
FIGURE 6. NOISE CHARACTERISTICS
1
2
3
4
6
5
-
+
10K
RP
V+
8
7
R1
C3
R3
R2
+
-
R1
R3
CS
R2
+
-
TEMPERATURE (oC)
OFFSET
V
O
L
T
A
GE
(
V)
-60
-40
-20
0
20
40
60
80
120
100
-60
-50
-40
-30
-20
-10
0
10
30
20
VS = ±15V, TA = 25
oC
NOISE VOLTAGE
NOISE CURRENT
1M
100K
10K
1K
100
10
1
FREQUENCY (Hz)
0
2
4
6
8
10
12
NOISE
VOLTAGE
(nV/
√Hz)
NOISE
CURRENT
(pA/
√Hz)
0
1
2
3
4
5
6
HA-5137A