ADS58C48IPFPR datasheet(6/70 Pages) TI

6 / 70 page

ADS58C48

SLAS689 – MAY 2010

www.ti.com

Table 1. SNR Enhancement with SNRBoost 3G Enabled(1)

SNR WITHIN SPECIFIED BANDWIDTH (dBFS)

BANDWIDTH,

IN DEFAULT MODE

MHz

WITH SNRBoost 3G ENABLED(2)(3)

(SNRBoost 3G Disabled)

MIN

TYP

MAX

MIN

TYP

MAX

69.7

72.3

69.8

71.8

74.5

72.8

75.4

72.8

74.4

76.8

(1)

SNRBoost 3G bath-tub centered at (3/4)xFs, -2 dBFS input applied at Fin = 140 MHz, sampling

frequency = 200 MSPS

(2)

Using suitable filters. See note on SNRBoost 3G in the SNR ENHANCEMENT USING SNRBOOST

section.

(3)

Specified by characterization.

ELECTRICAL CHARACTERISTICS

Typical values are at 25°C, AVDD = 1.8 V, DRVDD = 1.8 V, sampling frequency = 200 MSPS, 50% clock duty cycle, –1

dBFS differential analog input, SNRBoost disabled, LVDS and CMOS interfaces unless otherwise noted.

MIN and MAX values are across the full temperature range TMIN = –40°C to TMAX = 85°C, AVDD = 1.8 V, DRVDD = 1.8 V

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNITS

SNR

Fin= 20 MHz

66.7

dBFS

Signal to noise ratio,

Fin = 100 MHz

66.5

LVDS

Fin = 170 MHz

66.1

SINAD

Fin = 20 MHz

66.6

dBFS

Signal to noise and distortion ratio

Fin = 100 MHz

66.4

Fin = 170 MHz

65.9

SFDR

Fin = 20 MHz

dBc

Spurious free dynamic range

Fin = 100 MHz

Fin = 170 MHz

70.5

THD

Fin = 20 MHz

81.5

dBc

Total harmonic distortion

Fin = 100 MHz

82.5

Fin = 170 MHz

HD2

Fin = 20 MHz

dBc

Second harmonic distortion

Fin = 100 MHz

Fin = 170 MHz

70.5

HD3

Fin = 20 MHz

dBc

Third harmonic distortion

Fin = 100 MHz

Fin = 170 MHz

70.5

Worst Spur

Fin = 20 MHz

dBc

Other than second, third harmonics

Fin = 100 MHz

Fin = 170 MHz

76.5

IMD

F1 = 185 MHz, F2 = 190 MHZ, each tone at –7 dBFS

dBFS

2-tone inter-modulation distortion

Input overload recovery

Recovery to within 1% (of final value) for 6-dB overload with sine

clock

wave input

cycles

Crosstalk

With a full-scale 170MHz aggressor signal

Far channel

applied and no input on the victim channel

Near channel

PSRR

For 50-mVpp signal on AVDD supply

AC power supply rejection ratio

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