
MAX1157/MAX1159/MAX1175
14-Bit, 135ksps, Single-Supply ADCs with
Bipolar Analog Input Range
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3
ELECTRICAL CHARACTERISTICS (continued)
(AVDD = DVDD = +5V ±5%, external reference = +4.096V, CREF = 10F, CREFADJ = 0.1F, VREFADJ = AVDD, TA = TMIN to TMAX,
unless otherwise noted. Typical values are at TA = +25°C.)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
MAX1157,
0
≤ VAIN ≤ +10V
Normal/shutdown
mode
-0.1
+2.0
Normal operation
-1.8
+1.2
MAX1159,
-10V
≤ VAIN ≤ +10V
Shutdown mode
-1.8
+1.8
Normal operation
-1.8
+0.4
Input Current
IAIN
MAX1175,
-5V
≤ VAIN ≤ +5V
Shutdown mode
-1.8
+1.8
mA
MAX1159, VAIN = +10V, shutdown mode to
operating mode
0.5
0.7
Input Current Step at Power-Up
IPU
MAX1175, VAIN = +5V, shutdown mode to
operating mode
1
1.4
mA
Input Capacitance
CIN
10
pF
INTERNAL REFERENCE
REF Output Voltage
VREF
4.056
4.096
4.136
V
REF Output Tempco
±35
ppm/°C
REF Short-Circuit Current
IREF-SC
±10
mA
EXTERNAL REFERENCE
REF and REFADJ Input Voltage
Range
3.8
4.2
V
REFADJ Buffer Disable Threshold
AVDD -
0.4
AVDD -
0.1
V
Normal mode, fSAMPLE = 135ksps
60
100
REF Input Current
IREF
Shutdown mode (Note 1)
±0.1
±10
A
REFADJ Input Current
IREFADJ
REFADJ = AVDD
16
A
DIGITAL INPUTS/OUTPUTS
Output High Voltage
VOH
ISOURCE = 0.5mA, DVDD = +2.7V to +5.25V,
AVDD = +5.25V
DVDD -
0.4
V
Output Low Voltage
VOL
ISINK = 1.6mA, DVDD = +2.7V to +5.25V,
AVDD = +5.25V
0.4
V
Input High Voltage
VIH
0.7
×
DVDD
V
Input Low Voltage
VIL
0.3
×
DVDD
V
Input Leakage Current
Digital input = DVDD or 0V
-1
+1
A
Input Hysteresis
VHYST
0.2
V
Input Capacitance
CIN
15
pF
Three-State Output Leakage
IOZ
±10
A
Three-State Output Capacitance
COZ
15
pF