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MAX1425_11 Datasheet, PDF (3/16 Pages) Maxim Integrated Products – 10-Bit, 20Msps ADC Separate Digital Supply Input for 3V Logic Compatibility
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10-Bit, 20Msps ADC
ELECTRICAL CHARACTERISTICS (continued)
(VAVDD = VCMLP = +5V, VDVDD = +3.3V, VCMLN = VAGND = VDGND = 0V, internal reference, digital output load = 35pF, fCLK = 20MHz
(50% duty cycle), TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.)
PARAMETER
SYMBOL
ANALOG INPUT (INP, INN, CML)
Input Resistance
RIN
Input Capacitance
CIN
Input Common-Mode Voltage
Range
VCMVR
CONDITIONS
Either input to ground
Either input to ground
CML (Note 6)
MIN TYP MAX UNITS
3.5
kΩ
8
pF
2.25
±10%
V
Differential Input Range
DR
VINP - VINN
Small-Signal Bandwidth
SSBW (Note 7)
Large-Signal Bandwidth
LSBW (Note 7)
REFERENCE (VREFIN = 0; REFP, REFN, CML applied externally)
Input Resistance
RIN
REFIN (Note 8)
Input Capacitance
CIN
REFIN
Differential Reference
VREFP - VREFN
Input Current
IIN
REFP, CML, REFN
Input Capacitance
CIN REFP, CML, REFN
REFP Input Range
±2
V
400
MHz
150
MHz
6.5
kΩ
10
pF
2.0
V
-325
325
µA
15
pF
3.25
±10%
V
CML Input Range
2.25
±10%
V
REFN Input Range
1.25
±10%
V
REFERENCE OUTPUTS (REFP, CML, REFN; external +2.5V reference)
Positive Reference Voltage
VREFP
Common-Mode Reference
Voltage
VCML
3.25
V
2.25
V
Negative Reference Input
Voltage
VREFN
1.25
V
Differential Reference
Differential Reference
Temperature Coefficient
VREFP - VREFN, TA = +25°C
1.9
2.0
±50
2.1
V
ppm/°C
REFERENCE OUTPUTS (REFP, CML, REFN; internal +2.5V reference)
Positive Reference
VREFP (Note 1)
Common-Mode Reference
Voltage
VCML (Note 1)
3.25
V
2.25
V
Negative Reference
Differential Reference
Differential Reference
Temperature Coefficient
VREFN
(Note 1)
VREFP - VREFN, TA = +25°C
1.25
V
1.8
2
2.2
V
±150
ppm/°C
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