AD8270

Rev. 0 | Page 12 of 20

210

180

150

120

90

60

30

0

–600

–400

–200

0

200

400

600

N: 1043

MEAN: 4.6

SD: 134.5

0

1

2

345

6

7

8

9

10

TIME (s)

Figure 34. Typical Distribution of Op Amp Voltage Offset

Figure 37. Change in Op Amp Offset Voltage vs. Warm-Up Time

50pA/DIV

1s/DIV

100

80

60

40

20

0

310

315

320

325

330

335

340

N: 1043

MEAN: 321.6

SD: 6.9

Figure 38. 0.1 Hz to 10 Hz Current Noise of Internal Op Amp

Figure 35. Typical Distribution of Op Amp Bias Current

10

1

0.1

1

10

100

1k

10k

100k

FREQUENCY (Hz)

160

140

120

100

80

60

40

20

0

–9

–6

–3

0

3

6

9

12

N: 1043

MEAN: 0.31

SD: 2.59

Figure 39. Current Noise Spectral Density of Internal Op Amp

Figure 36. Typical Distribution of Op Amp Offset Current