LTC6945 datasheet(5/36 Pages) LINER

5 / 36 page

2270f

LTC2270

INTERNAL REFERENCE CHARACTERISTICS The l denotes the specifications which apply over the

full operating temperature range, otherwise specifications are at TA = 25°C. (Note 5)

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

VCM Output Voltage

IOUT = 0

0.5 • VDD – 25mV

0.5 • VDD

0.5 • VDD + 25mV

VCM Output Temperature Drift

±25

ppm/°C

VCM Output Resistance

–600μA < IOUT < 1mA

VREF Output Voltage

IOUT = 0

1.230

1.250

1.270

VREF Output Temperature Drift

±25

ppm/°C

VREF Output Resistance

–400μA < IOUT < 1mA

VREF Line Regulation

1.7V < VDD < 1.9V

0.6

mV/V

DYNAMIC ACCURACY The l denotes the specifications which apply over the full operating temperature range,

otherwise specifications are at TA = 25°C. AIN = –1dBFS. (Note 5)

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

SNR

Signal-to-Noise Ratio

1.4MHz Input

5MHz Input

30MHz Input

70MHz Input

82.3

84.1

83.8

82.7

dBFS

SFDR

Spurious Free Dynamic Range, 2nd Harmonic

1.4MHz Input

5MHz Input

30MHz Input

70MHz Input

dBFS

Spurious Free Dynamic Range, 3rd Harmonic

1.4MHz Input

5MHz Input

30MHz Input

70MHz Input

dBFS

Spurious Free Dynamic Range, 4th Harmonic or Higher

1.4MHz Input

5MHz Input

30MHz Input

70MHz Input

110

105

100

dBFS

S/(N+D)

Signal-to-Noise Plus Distortion Ratio

1.4MHz Input

5MHz Input

30MHz Input

70MHz Input

81.9

83.9

83.7

82.0

dBFS

Crosstalk

10MHz Input

–110

dBc

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