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MAX1425

10-Bit, 20Msps ADC

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ELECTRICAL CHARACTERISTICS (continued)

Note 1: Internal reference, REFIN bypassed to AGND with a 0.1µF capacitor.

Note 2: External +2.5V reference applied to REFIN.

Note 3: Internal reference disabled. V

REFIN

= 0, V

REFP

= 3.25V, V

CML

= 2.25V, and V

REFN

= 1.25V.

Note 4: Measured as the ratio of the change in midscale offset voltage for a ±5% change in V

using the internal reference.

Note 5: IMD is measured with respect to either of the fundamental tones.

Note 6: Specifies the common-mode range of the differential input signal supplied to the MAX1425.

Note 7: Defined as the input frequency at which the fundamental component of the output spectrum is attenuated by 3dB.

Note 8: V

REFIN

is internally biased to +2.5V through a 5kΩ resistor.

Typical Operating Characteristics

= V

CMLP

= +5V, V

= +3.3V, V

CMLN

= V

AGND

= 0, internal reference, digital output load = 35pF, f

CLK

= 20Msps (50%

duty cycle), for dynamic performance 0dB is full scale, T

= +25°C, unless otherwise noted.)

-1.2

-0.6

-0.8

-1.0

-0.4

-0.2

0.2

0.4

0.6

0.8

0 400200 600

800

1000

INTEGRAL NONLINEARITY vs. CODE

MAX1425-01

CODE

INL (LSB)

INP

= 2MHz

-0.6

-0.2

-0.4

0.2

0.4

0.6

0 400200 600

800

1000

DIFFERENTIAL NONLINEARITY vs. CODE

MAX1425-02

CODE

DNL (LSB)

INP

= 2MHz

-8.0

-6.0

-7.0

-5.0

-4.0

-3.0

-2.0

-1.0

0.01 10.1 10 100 1000 10,000

ANALOG INPUT BANDWIDTH

(FULL POWER)

MAX1425-03

BANDWIDTH (MHz)

AMPLITUDE (dB)

-140

-100

-120

-60

-80

-20

-40

042681537910

INTERMODULATION DISTORTION

vs. FREQUENCY

MAX1425-04

FREQUENCY (MHz)

MAGNITUDE (dB)

CLK

= 20MHz

f1 = 5.01MHz

f2 = 5.03MHz

CLK

= 20MHz

f1 = 5.01MHz

f2 = 5.03MHz

SIGNAL-TO-NOISE PLUS DISTORTION

vs. POWER (f

= 2.003MHz)

MAX1425-05

INPUT (dB)

SINAD (dB)

-60 -30-45 -15 0

SIGNAL-TO-NOISE RATIO PLUS DISTORTION

vs. POWER (f

= 5.009MHz)

MAX1425-06

INPUT (dB)

SNDR (dB)

-60 -30-45 -15 0

1 2 3 4 5 6 7 8 9 10 ... 15 16

10-Bit, 20Msps ADC 1

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