90

85

80

75

70

65

60

55

ClockDutyCycle(%)

35

65

50

45

40

55

SNR(dBFS)

SFDR(dBc)

f =65MHz

f

=10MHz

S

IN

60

95

85

80

75

70

60

ClockDutyCycle(%)

20

80

50

40

30

60

SNR(dBFS)

SFDR(dBc)

f =65MHz

f

=10MHz

S

IN

90

70

65

90

85

80

75

70

65

60

ExternalReferenceCommon-ModeVoltage,(REF +REF )/2(V)

T

B

1.35

1.65

1.50

1.45

1.40

SNR(dBFS)

SFDR(dBc)

f =65MHz

f

=10MHz

S

IN

1.55

1.60

Externalreferencedifferentialvoltagemaintainedat2V.

90

85

80

75

70

65

60

VoltageonV

(V)

CM

1.35

1.65

1.50

1.45

1.40

SNR(dBFS)

SFDR(dBc)

f =65MHz

f

=10MHz

S

IN

1.55

1.60

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.

DYNAMIC PERFORMANCE

DYNAMIC PERFORMANCE

vs

vs

EXTERNAL REFERENCE COMMON-MODE VOLTAGE

EXTERNAL REFERENCE FORCED THROUGH VCM

Figure 20.

Figure 21.

DYNAMIC PERFORMANCE

DYNAMIC PERFORMANCE

vs

vs

CLOCK DUTY CYCLE

CLOCK DUTY CYCLE

(DCC DISABLED)

(DCC ENABLED)

Figure 22.

Figure 23.

28

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