AD8274
CONFIGURATIONS
The AD8274 can be configured in several ways; see Figure 40 to Figure 47. Because these configurations rely on the internal, matched
resistors, all of these configurations have excellent gain accuracy and gain drift. Note that the AD8274 internal op amp is stable for noise
gains of 1.5 and higher, so the AD8274 should not be placed in a unity-gain follower configuration.
12kΩ
12kΩ
6kΩ
12kΩ
6kΩ
2
3
5
6
2
5
6
–IN
OUT
OUT
6kΩ
12kΩ
6kΩ
3
1
1
+IN
+IN
V
= ½ (V
IN+
− V )
IN−
OUT
V
= ½ V
IN
OUT
Figure 44. Noninverting Amplifier, G = ½
Figure 40. Difference Amplifier, G = ½
6kΩ
6kΩ
12kΩ
12kΩ
6kΩ
6kΩ
12kΩ
12kΩ
5
1
2
6
5
1
2
6
–IN
+IN
OUT
OUT
3
3
+IN
V
= 2 (V
IN+
− V )
IN−
OUT
V
= 2 V
IN
OUT
Figure 41. Difference Amplifier, G = 2
Figure 45. Noninverting Amplifier, G = 2
12kΩ
6kΩ
12kΩ
6kΩ
2
5
6
2
5
6
–IN
OUT
OUT
6kΩ
6kΩ
1
1
3
+IN
12kΩ
12kΩ
3
V
= 1½ V
IN
OUT
V
= –½ V
IN
OUT
Figure 46. Noninverting Amplifier, G = 1.5
Figure 42. Inverting Amplifier, G = −½
6kΩ
12kΩ
6kΩ
12kΩ
5
2
5
2
6
–IN
OUT
OUT
6
12kΩ
6kΩ
3
12kΩ
6kΩ
1
+IN
3
1
V
= 3 V
OUT
IN
V
= –2 V
IN
OUT
Figure 47. Noninverting Amplifier, G = 3
Figure 43. Inverting Amplifier, G = −2
Rev. C | Page 13 of 16
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