AD7761 datasheet(25/76 Pages) AD

25 / 76 page

AD7761

Data Sheet

Rev. A | Page 24 of 75

–160

–140

–120

–100

–80

–60

–40

–20

NORMALIZED INPUT FREQUENCY (

fIN/fODR)

RESOLUTION LIMIT = –110dB

Figure 35. Sinc5 Filter Profile, Amplitude vs. fIN/fODR

SAMPLES

–4

–3

–2

–1

AINx

DOUTx

10000

20000

30000

40000

50000

60000

70000

Figure 36. Step Response, Sinc5 Filter

–40

–30

–20

–10

–

105

TEMPERATURE (°C)

COMMON-MODE COMPONENT, NO PRECHARGE (µA/V)

DIFFERENTIAL COMPONENT, NO PRECHARGE (µA/V)

TOTAL CURRENT, PRECHARGE ON (µA)

Figure 37. Analog Input Current vs. Temperature, Analog Input Precharge

Buffers On/Off

–80

–70

–60

–50

–40

–30

–20

–10

–40

105

TEMPERATURE (°C)

FAST, NO PRECHARGE

MEDIAN, NO PRECHARGE

FOCUS, NO PRECHARGE

FAST WITH PRECHARGE

MEDIAN WITH PRECHARGE

FOCUS WITH PRECHARGE

Figure 38. Reference Input Current vs. Temperature, Reference Precharge

Buffers On/Off

120

100

2.47

2.46

2.45

2.44

2.43

2.42

VCM (V)

AVDD1 = 5V, AVSS = 0V

VCM_VSEL = 10

PART TO PART DISTRIBUTION

Figure 39. VCM Output Voltage Distribution

–40

–25

–10

110

TEMPERATURE (°C)

FOCUS

FAST

MEDIAN

Figure 40. Supply Current vs. Temperature, AVDD1

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