ADS5287 datasheet(30/42 Pages) TI

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16384t (Group1)

Set1,Point1(of16)

Set1,Point2(of16)

Firstpointafteroverload(Set1)

Firstpointafteroverload(Set2)

Secondpointafteroverload(Set2)

Secondpointafteroverload(Set1)

Overload

Amplitude

NOTES:

Inputsinewavephaseisrepetitiveover16384clockcycles.

16suchrepetitivegroups(of16384clockcycles)arecaptured–atotalof262,144points.

Standarddeviationofeverysetof

areanalyzedoverthe16groups.

Worstcaseofallsuchstandarddeviationsareplottedinthegraphs.

firstandsecondpointsafteroverload

+FS

-FS

170

130

110

ClockFrequency(MSPS)

LVDD

AVDD

ZeroInputonAllChannels

InternalReferenceMode

150

0.6

0.5

0.4

0.3

0.2

0.1

OverloadSignalAmplitude(dBFS)

f =65MSPS

=5MHz

StandardDeviationof

2ndPointAfterOverload

StandardDeviationof

1stPointAfterOverload

ADS5287

SBAS428D – JANUARY 2008 – REVISED JUNE 2012

www.ti.com

TYPICAL CHARACTERISTICS (continued)

Typical values at +25°C. Minimum and maximum values are measured across the specified temperature range of TMIN =

–40°C to TMAX = +85°C, AVDD = 3.3V, LVDD = 1.8V, clock frequency = 10MSPS to 65MSPS, 50% clock duty cycle, –1dBFS

differential analog input, internal reference mode, ISET resistor = 56.2kΩ, and LVDS buffer current setting = 3.5mA, unless

otherwise noted.Typical values at +25°C.

AVDD AND LVDD POWER-SUPPLY CURRENTS

CLOCK FREQUENCY

OVERLOAD RECOVERY AT 65MSPS

Figure 28.

Figure 29.

Figure 30. Overload Recovery

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