MAX146ACAP(2001) 데이터 시트보기 (PDF) - Maxim Integrated
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MAX146ACAP Datasheet PDF : 24 Pages
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+2.7V, Low-Power, 8-Channel,
Serial 12-Bit ADCs
ELECTRICAL CHARACTERISTICS (continued)
(VDD = +2.7V to +3.6V (MAX146); VDD = +2.7V to +5.25V (MAX147); COM = 0; fSCLK = 2.0MHz; external clock (50% duty cycle); 15
clocks/conversion cycle (133ksps); MAX146—4.7µF capacitor at VREF pin; MAX147—external reference, VREF = 2.500 V applied to
VREF pin; TA = TMIN to TMAX; unless otherwise noted.)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX UNITS
Track/Hold Acquisition Time
tACQ
1.5
µs
Aperture Delay
30
ns
Aperture Jitter
<50
ps
Internal Clock Frequency
External Clock Frequency
SHDN = FLOAT
SHDN = VDD
Data transfer only
1.8
0.225
MHz
0.1
2.0
MHz
0
2.0
ANALOG/COM INPUTS
Input Voltage Range, Single-
Ended and Differential (Note 6)
Unipolar, COM = 0V
Bipolar, COM = VREF / 2
0 to VREF
V
±VREF / 2
Multiplexer Leakage Current
Input Capacitance
On/off leakage current, VCH_ = 0V or VDD
±0.01 ±1
µA
16
pF
INTERNAL REFERENCE (MAX146 only, reference buffer enabled)
VREF Output Voltage
TA = +25°C
VREF Short-Circuit Current
MAX146_C
VREF Temperature Coefficient
MAX146_E
MAX146_M
Load Regulation (Note 7)
0 to 0.2mA output load
Capacitive Bypass at VREF
Internal compensation mode
External compensation mode
Capacitive Bypass at REFADJ
REFADJ Adjustment Range
2.480
0
4.7
0.047
2.500
±30
±30
±30
0.35
±1.5
2.520 V
30
mA
±50
±60 ppm/°C
±80
mV
µF
µF
%
EXTERNAL REFERENCE AT VREF (Buffer disabled)
VREF Input Voltage Range
(Note 8)
1.0
VDD +
50mV
V
VREF Input Current
VREF Input Resistance
Shutdown VREF Input Current
VREF = 2.5V
100
150
µA
18
25
kΩ
0.01
10
µA
REFADJ Buffer Disable Threshold
VDD -
0.5
V
EXTERNAL REFERENCE AT REFADJ
Capacitive Bypass at VREF
Reference Buffer Gain
REFADJ Input Current
Internal compensation mode
External compensation mode
MAX146
MAX147
MAX146
MAX147
0
µF
4.7
2.06
V/V
2.00
±50
µA
±10
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