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MAX1147 Datasheet(PDF) 3 Page - Maxim Integrated Products

Part # MAX1147
Description  Multichannel, True-Differential, Serial, 14-Bit ADCs
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Manufacturer  MAXIM [Maxim Integrated Products]
Direct Link  https://www.maximintegrated.com/en.html
Logo MAXIM - Maxim Integrated Products

MAX1147 Datasheet(HTML) 3 Page - Maxim Integrated Products

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Multichannel, True-Differential,
Serial, 14-Bit ADCs
_______________________________________________________________________________________
3
ELECTRICAL CHARACTERISTICS (continued)
(VDD = 5V (MAX1146/MAX1148), VDD = 3.3V (MAX1147/MAX1149), SHDN = VDD, VCOM = 0, fSCLK = 2.1MHz, external clock (50%
duty cycle), 18 clocks/conversion (116ksps), VREFADJ = VDD, CREF = 2.2µF, external +4.096V reference at REF (MAX1146/
MAX1148), external 2.500V reference at REF (MAX1147/MAX1149), TA = TMIN to TMAX, unless otherwise noted. Typical values are at
TA = +25°C.)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
18 clocks/conversion
60.3
Internal clock mode,
fSCLK = 2.1MHz
24 clocks/conversion
51.5
18 clocks/conversion
116.66
Throughput Rate
fSAMPLE
External clock mode,
fSCLK = 2.1MHz
24 clocks/conversion
87.50
ksps
T/H Acquisition Time
tACQ
1.4
µs
Aperture Delay
tAD
20
ns
Aperture Jitter
tAJ
<50
ps
External clock mode
0.1
2.1
Serial Clock Frequency
fSCLK
Internal clock mode
0
2.1
MHz
Internal Clock Frequency
2.1
MHz
ANALOG INPUTS (CH0–CH7, COM)
Unipolar, COM = 0
0
VREF
Input Voltage Range, Single-
Ended and Differential (Note 6)
Bipolar, COM = VREF / 2, single-ended
±VREF / 2
V
Multiplexer Leakage Current
On/off-leakage current, VCH_ = 0 to VDD
±0.01
±1
µA
Input Capacitance
18
pF
INTERNAL REFERENCE (CREF = 2.2µF, CREFADJ = 0.01µF)
MAX1147/MAX1149, TA = +25°C
2.480
2.500
2.520
REF Output Voltage
VREF
MAX1146/MAX1148, TA = +25°C
4.076
4.096
4.116
V
REF Short-Circuit Current
IREFSC
REF = DGND
20
mA
MAX114_ BC _ _
±30
±50
VREF Tempco (Note 7)
MAX114_ BE _ _
±40
±60
ppm/°C
Load Regulation
0 to 0.2mA output load (Note 8)
2.0
mV
Capacitive Bypass at REF
2µF
Capacitive Bypass at REFADJ
0.01
µF
REFADJ Output Voltage
1.250
V
REFADJ Input Range
±18
mV
REFADJ Logic High
Pull REFADJ high to disable the internal
bandgap reference and reference buffer
VDD -
0.25V
V
MAX1147/MAX1149
2.000
Reference Buffer Voltage Gain
MAX1146/MAX1148
3.277
V/V


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