AD7641ASTRL 데이터 시트보기 (PDF) - Analog Devices

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AD7641ASTRL

18-Bit, 2 MSPS SAR ADC

Analog Devices 

AD7641

TYPICAL PERFORMANCE CHARACTERISTICS

3.0

2.5

2.0

1.5

1.0

0.5

0

–0.5

–1.0

–1.5

–2.0

–2.5

–3.0

0

65536

131072

196608

CODE

Figure 5. Integral Nonlinearity vs. Code

262144

40000

35000

30000

25000

34844

31003

24739

σ = 1.55

20000

15000

10000

10938

5000

4730

11

683

002

272

0

16207

5248

2124

232 39 0 0

CODE IN HEX

Figure 6. Histogram of 261,120 Conversions of a DC Input at

the Code Center (External Reference)

2.0530

2.0525

2.0520

2.0515

2.0510

2.0505

2.0500

2.0495

2.0490

2.0485

2.0480

–55 –35 –15 5

25 45 65 85 105 125

TEMPERATURE (°C)

Figure 7. Typical Reference Voltage Output vs. Temperature (3 Units)

2.0

1.5

1.0

0.5

0

–0.5

–1.0

–1.5

–2.0

0

30000

25000

20000

65536

131072

196608

CODE

Figure 8. Differential Nonlinearity vs. Code

262144

24731

23436

22225

18995

σ = 2.02

15000

10000

12922

10846

5000

2105

912

1 1 52 117

0

8219

4688

1171

58951 10 1

CODE IN HEX

Figure 9. Histogram of 261,120 Conversions of a DC Input at

the Code Center (Internal Reference)

20

18

16

–FS

14

12

10

8

6

4

2

0

–2

–4

ZERO-ERROR

–6

–8

–10

–12

–14

–16

+FS

–18

–20

–55 –35 –15 5 25 45 65 85 105 125

TEMPERATURE (°C)

Figure 10. Zero Error, Positive and Negative Full Scale vs. Temperature

Rev. 0 | Page 12 of 28

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