MAX1425_11 Datasheet, PDF (5/16 Pages) Maxim Integrated Products – 10-Bit, 20Msps ADC Separate Digital Supply Input for 3V Logic Compatibility

10-Bit, 20Msps ADC
ELECTRICAL CHARACTERISTICS (continued)
Note 1:
Note 2:
Note 3:
Note 4:
Note 5:
Note 6:
Note 7:
Note 8:
Internal reference, REFIN bypassed to AGND with a 0.1µF capacitor.
External +2.5V reference applied to REFIN.
Internal reference disabled. V_REFIN = 0, V_REFP = 3.25V, V_CML = 2.25V, and V_REFN = 1.25V.
Measured as the ratio of the change in midscale offset voltage for a ±5% change in V_AVDD using the internal reference.
IMD is measured with respect to either of the fundamental tones.
Specifies the common-mode range of the differential input signal supplied to the MAX1425.
Defined as the input frequency at which the fundamental component of the output spectrum is attenuated by 3dB.
V_REFIN is internally biased to +2.5V through a 5kΩ resistor.
Typical Operating Characteristics
(V_AVDD = V_CMLP = +5V, V_DVDD = +3.3V, V_CMLN = V_AGND = 0V, internal reference, digital output load = 35pF, f_CLK = 20Msps (50%
duty cycle), for dynamic performance 0dB is full scale, T_A = +25°C, unless otherwise noted.)
INTEGRAL NONLINEARITY vs. CODE
0.8
f_INP = 2MHz
0.6
0.4
0.2
0
-0.2
DIFFERENTIAL NONLINEARITY vs. CODE
0.6
f_INP = 2MHz
0.4
0.2
0
ANALOG INPUT BANDWIDTH
(FULL POWER)
0
-1.0
-2.0
-3.0
-4.0
-0.4
-5.0
-0.6
-0.2
-6.0
-0.8
-0.4
-1.0
-7.0
-1.2
0
200 400 600 800 1000
CODE
-0.6
0
200 400 600 800 1000
CODE
-8.0
0.01 0.1
1 10 100 1000 10,000
BANDWIDTH (MHz)
INTERMODULATION DISTORTION
vs. FREQUENCY
0
-20
ff_CCLLKK ^==2200MMHHzz
ff11 == ^{55..0011MMHHzz}
-40
ff22 == ^{55..0033MMHHzz}
-60
SIGNAL-TO-NOISE PLUS DISTORTION
vs. POWER (f_IN = 2.003MHz)
60
40
SIGNAL-TO-NOISE RATIO PLUS DISTORTION
vs. POWER (f_IN = 5.009MHz)
60
40
-80
20
20
-100
-120
-140
0 1 2 3 4 5 6 7 8 9 10
FREQUENCY (MHz)
0
-60
-45
-30
-15
0
INPUT (dB)
0
-60
-45
-30
-15
0
INPUT (dB)
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