MAX1272 Datasheet, PDF (3/20 Pages) Maxim Integrated Products – Fault-Protected, 12-Bit ADCs with Software-Selectable Input Range

Fault-Protected, 12-Bit ADCs
with Software-Selectable Input Range
ELECTRICAL CHARACTERISTICS (continued)
(V_DD = 4.75V to 5.25V, unipolar/bipolar input range, external reference mode, V_REF = 4.096V, C_REF = 1.0µF, f_SCLK = 1.4MHz,
50% duty cycle, C_LOAD = 50pF, T_A = T_MIN to T_MAX, unless otherwise noted. Typical values are at T_A = +25°C.)
PARAMETERS
SYMBOL
CONDITIONS
MIN TYP MAX UNITS
±10V (MAX1272) or ±V_REF (MAX1273)
5
range
±5V (MAX1272) or ±V_REF / 2 (MAX1273)
2.5
range
Small-Signal Bandwidth
BW_-3dB
0 to 10V (MAX1272) or 0 to V_REF (MAX1273)
2.5
range
MHz
0 to 5V (MAX1272) or 0 to V_REF / 2
(MAX1273) range
1.25
Input Voltage Range
(Tables 2, 3)
RNG = 1
MAX1272
RNG = 0
Unipolar
RNG = 1
MAX1273
RNG = 0
V_IN
RNG = 1
MAX1272
RNG = 0
Bipolar
RNG = 1
MAX1273
RNG = 0
Input Current
Input Capacitance
0 to 10V range
MAX1272
0 to 5V range
Unipolar
MAX1273 ^{0 to VREF range}
I_IN
0 to V_REF / 2 range
±10V range
MAX1272
±5V range
Bipolar
MAX1273 ^{±VREF range}
±V_REF / 2 range
INTERNAL REFERENCE
REF Output Voltage
V_REF
REF Output Tempco
MAX127_ C
TC V_{REF MAX127_ E}
Output Short-Circuit Current
REF shorted to GND
Load Regulation
0 to 0.5mA output current
Capacitive Bypass at REF
REFERENCE INPUT (Reference buffer disabled, reference input applied to REF)
Input Voltage Range
0
10
0
5
0
V_REF
0
V_REF / 2
V
-10
+10
-5
+5
-V_REF
-V_REF / 2
+V_REF
+V_REF / 2
-10
+860
-10
+430
-10
+10
-10
-1400
+10
µA
+860
-720
+430
-1400
+10
-720
+10
40
pF
4.036
1
4.096
±15
±30
40
0.7
4.156
V
ppm/°C
mA
10
mV
µF
2.40
4.18
V
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