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MAX148B View Datasheet(PDF) - Maxim Integrated

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Description
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MAX148B Datasheet PDF : 23 Pages
1 2 3 4 5 6 7 8 9 10 Next Last
+2.7V to +5.25V, Low-Power, 8-Channel,
Serial 10-Bit ADCs
ELECTRICAL CHARACTERISTICS (continued)
(VDD = +2.7V to +5.25V; COM = 0; fSCLK = 2.0MHz; external clock (50% duty cycle); 15 clocks/conversion cycle (133ksps);
MAX149—4.7FF capacitor at VREF pin; MAX148—external reference, VREF = 2.500V applied to VREF pin; TA = TMIN to TMAX, unless
otherwise noted.)
PARAMETER
SYMBOL
CONVERSION RATE (continued)
Internal Clock Frequency
CONDITIONS
SHDN = unconnected
SHDN = VDD
External Clock Frequency
Data transfer only
ANALOG/COM INPUTS
Input Voltage Range, Single-
Ended and Differential (Note 6)
Unipolar, COM = 0
Bipolar, COM = VREF/2
Multiplexer Leakage Current
On/off leakage current, VCH_ = 0 or VDD
Input Capacitance
INTERNAL REFERENCE (MAX149 Only, Reference Buffer Enabled)
VREF Output Voltage
VREF Short-Circuit Current
TA = +25°C (Note 7)
VREF Temperature Coefficient
MAX149
Load Regulation (Note 8)
0 to 0.2mA output load
Capacitive Bypass at VREF
Internal compensation mode
External compensation mode
Capacitive Bypass at REFADJ
REFADJ Adjustment Range
EXTERNAL REFERENCE AT VREF (Buffer Disabled)
VREF Input Voltage Range
(Note 9)
VREF Input Current
VREF Input Resistance
Shutdown VREF Input Current
VREF = 2.500V
REFADJ Buffer-Disable Threshold
EXTERNAL REFERENCE AT REFADJ
Capacitive Bypass at VREF
Reference Buffer Gain
REFADJ Input Current
Internal compensation mode
External compensation mode
MAX149
MAX148
MAX149
MAX148
MIN TYP MAX UNITS
1.8
0.225
0.1
2.0
1
2.0
MHz
MHz
0 to VREF
V
±VREF/2
±0.01 ±1
μA
16
pF
2.470
0
4.7
0.01
2.500
±30
0.35
±1.5
2.530
30
V
mA
ppm/°C
mV
μF
μF
%
1.0
VDD +
50mV
V
100 150
μA
18
25
kΩ
0.01
10
µA
VDD -
0.5
V
0
µF
4.7
2.06
V/V
2.00
±50
µA
±10
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