Pole at
106Hz
G = 1
1500pF
RG2
10kΩ
RG2
1MΩ
RG1
10kΩ
5
VI–N
2
3
5
2
VI–N
10kΩ
VO
6
10kΩ
VO
VI+N
6
INA146
1
8
1N4684 (3.3V)
1N914
VI+N
3
Output clamps at
approximately ±4V.
INA146
1
8
22nF
Pole at
720Hz
FIGURE 5. Output Clamp.
FIGURE 4. Noise Filtering.
RG2
10kΩ
5
R1
R2
VI–N
2
0V ≤ VO ≤ 5V
10kΩ
VO
6
R3
R4
3
VI+N
INA146
8
1
1N914
(1)
5.0V
Voltage
Reference
or analog-to-digital VS
1N914
(1)
NOTE: (1) 1/2 OPA2342 with VS connected to +5V and GND.
FIGURE 6. Precision Clamp.
®
10
INA146