AD7942 datasheet(9/16 Pages) AD

9 / 16 page

AD7684

Rev. A | Page 9 of 16

TYPICAL PERFORMANCE CHARACTERISTICS

–3

–2

–1

16384

32768

49152

65536

CODE

POSITIVE INL = +0.83LSB

NEGATIVE INL = –1.07LSB

Figure 7. Integral Nonlinearity vs. Code

151

94794

18557

17388

182

20000

40000

60000

80000

100000

120000

FFFD FFFE FFFF

0000

0001

0002

0003

0004

0005

CODE IN HEX

VDD = REF = 2.5V

Figure 8. Histogram of a DC Input at the Code Center

–

180

–

160

–

140

–

120

–

100

–

010

FREQUENCY (kHz)

16384 POINT FFT

VDD = REF = 5V

fS = 100kSPS

fIN = 20.43kHz

Figure 9. FFT Plot

–3

–2

–1

16384

32768

49152

65536

CODE

POSITIVE DNL = +0.9LSB

NEGATIVE DNL = –0.45LSB

Figure 10. Differential Nonlinearity vs. Code

123872

4150

3050

50000

100000

150000

FFFB

FFFC

FFFD

FFFE

FFFF

CODE IN HEX

VDD = REF = 5V

Figure 11. Histogram of a DC Input at the Code Center

–

180

–

160

–

140

–

120

–

100

–

010

FREQUENCY (kHz)

16384 POINT FFT

VDD = REF = 2.5V

fS = 100kSPS

fIN = 20.43kHz

Figure 12. FFT Plot

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