ADS1626IPAPR datasheet(14/37 Pages) TI

14 / 37 page

ADS1625

ADS1626

SBAS280E − JUNE 2003 − REVISED MAY 2007

www.ti.com

TYPICAL CHARACTERISTICS (continued)

All specifications at TA = 25°C, AVDD = 5V, DVDD = IOVDD = 3V, fCLK = 40MHz, External VREF = +3V, VCM = 2.0V, and RBIAS = 37kΩ,

unless otherwise noted.

SIGNAL−TO−NOISE RATIO

vs INPUT COMMON−MODE VOLTAGE

1.5

1.9

1.7

2.1

2.3

2.9

2.5

2.7

Input Common−Mode Voltage, V

CM (V)

IN = − 6dBFS

IN =100kHz

IN = − 2dBFS

TOTAL HARMONIC DISTORTION

vs INPUT COMMON−MODE VOLTAGE

1.5

1.9

1.7

2.1

2.3

2.9

2.5

2.7

Input Common−Mode Voltage, V

CM (V)

−80

−85

−90

−95

−100

−105

−110

IN = − 6dBFS

IN =100kHz

IN = − 2dBFS

SPURIOUS−FREE DYNAMIC RANGE

vs INPUT COMMON−MODE VOLTAGE

1.5

1.9

1.7

2.1

2.3

2.9

2.5

2.7

Input Common−Mode Voltage, V

CM (V)

110

105

100

IN = −6dBFS

IN = − 2dBFS

IN =100kHz

SIGNAL−TO−NOISE RATIO

vs CLK FREQUENCY

CLK Frequency, f

CLK (MHz)

IN = 100kHz, −6dBFS

BIAS =30kΩ

BIAS =37kΩ

BIAS =45kΩ

BIAS =50kΩ

BIAS =60kΩ

TOTAL HARMONIC DISTORTION

vs CLK FREQUENCY

−75

−80

−85

−90

−95

−100

−105

CLK Frequency, f

CLK (MHz)

IN = 100kHz, −6dBFS

BIAS =30kΩ

BIAS =37kΩ

BIAS =45kΩ

BIAS =50kΩ

BIAS = 60kΩ

SPURIOUS−FREE DYNAMIC RANGE

vs CLK FREQUENCY

110

105

100

CLK Frequency, f

CLK (MHz)

IN = 100kHz, −6dBFS

BIAS =30kΩ

BIAS =37kΩ

BIAS = 45kΩ

BIAS =50kΩ

BIAS =60kΩ

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