MAX1421(2001) Ver la hoja de datos (PDF) - Maxim Integrated
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MAX1421 Datasheet PDF : 17 Pages
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12-Bit, 40Msps, +3.3V, Low-Power ADC
with Internal Reference
ELECTRICAL CHARACTERISTICS (continued)
(VAVDD = VDVDD = +3.3V, AGND = DGND = 0, VIN = ±1.024V, differential input voltage at -0.5dB FS, internal reference,
fCLK = 40MHz (50% duty cycle), digital output load CL ≈ 10pF, TA = TMIN to TMAX, unless otherwise noted. Typical values are at
TA = +25°C.)
PARAMETER
SYMBOL
CONDITIONS
Differential Gain
Differential Phase
ANALOG INPUTS (INP, INN, CML)
Input Resistance
Input Capacitance
Common-Mode Input Level,
(Note 5)
DG
DP
RIN
CIN
VCML
Either input to ground
Either input to ground
Common-Mode Input Voltage
Range, (Note 5)
VCMVR
Differential Input Range
Small-Signal Bandwidth
Large-Signal Bandwidth
VIN
BW-3dB
FPBW-3dB
VINP - VINN (Note 6)
(Note 7)
(Note 7)
Over-Voltage Recovery
OVR 1.5 ✕ FS input
INTERNAL REFERENCE (REFIN bypassed with 0.22µF in parallel with 1nF)
Common-Mode Reference Input
Voltage
VCML At CML
MIN TYP MAX UNITS
±1
%
±0.25
degrees
32.5
4
VAVDD
× 0.5
VCML
±5%
±VDIFF
400
150
1
kΩ
pF
V
V
V
MHz
MHz
Clock
Cycle
VAVDD
✕ 0.5
V
Positive Reference Voltage
Range
VREFP At REFP
VCML
+ 0.512
V
Negative Reference Voltage
Range
VREFN At REFN
VCML
V
- 0.512
Differential Reference Voltage
Range
VDIFF
VDIFF = VREFP - VREFN
1.024
±5%
V
Differential Reference
Temperature Coefficient
EXTERNAL REFERENCE
REFIN Input Resistance
REFIN Input Capacitance
REFIN Reference Input Voltage
REFTC
RIN
CIN
VREFIN
(Note 8)
±100
5
10
2.048
±10%
ppm/°C
kΩ
pF
V
Differential Reference Voltage
VDIFF VDIFF = (VREFP - VREFN)
0.95 ✕
VREFIN/2
VREFIN/2
1.05 ✕
VREFIN/2
V
EXTERNAL REFERENCE (VREFIN = AGND, reference voltage applied to REFP, REFN and CML)
REFP, REFN, CML Input Current
IIN
-200
200
µA
REFP, REFN, CML Input
Capacitance
CIN
15
pF
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