AD7643BSTZ datasheet(13/29 Pages) AD

13 / 29 page

AD7643

Rev. 0 | Page 12 of 28

TYPICAL PERFORMANCE CHARACTERISTICS

3.0

–3.0

262144

CODE

2.5

2.0

1.5

1.0

0.5

–0.5

–1.0

–1.5

–2.0

–2.5

65536

131072

196608

Figure 5. Integral Nonlinearity vs. Code

40000

CODE IN HEX

35000

30000

25000

20000

15000

10000

5000

σ = 1.67

VREF = 2.5V

228

33606

26875

23521

17320

4848

3062

13376

6371

1295

488

Figure 6. Histogram of 131,072 Conversions of a DC Input at

the Code Center (External Reference)

2.0486

2.0484

2.0482

2.0480

2.0478

2.0476

2.0474

2.0472

2.0470

–55

125

105

–15

–35

TEMPERATURE (°C)

Figure 7. Typical Reference Voltage Output vs. Temperature (2 Units)

1.25

–1.0

262144

CODE

0.5

65536

131072

196608

1.0

–0.5

Figure 8. Differential Nonlinearity vs. Code

35000

CODE IN HEX

30000

25000

20000

15000

10000

5000

21 28 305 665

297 108 32

4726 5401

15505

18613

28621

24350

16141

3807

10173

2306

σ = 2.04

VREF = 2.048V

Figure 9. Histogram of 131,072 Conversions of a DC Input at

the Code Center (Internal Reference)

–12

–10

–8

–6

–4

–2

–55

125

105

–15

–35

TEMPERATURE (°C)

GAIN ERROR

ZERO ERROR

Figure 10. Zero Error, Gain Error vs. Temperature

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