MAX149A Просмотр технического описания (PDF) - Maxim Integrated
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MAX149A Datasheet PDF : 23 Pages
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+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
DIGITAL INPUTS (DIN, SCLK, CS, SHDN)
DIN, SCLK, CS Input High Voltage
VIH
DIN, SCLK, CS Input Low Voltage
DIN, SCLK, CS Input Hysteresis
DIN, SCLK, CS Input Leakage
DIN, SCLK, CS Input Capacitance
VIL
VHYST
IIN
CIN
CONDITIONS
VDD ≤ 3.6V
VDD > 3.6V
VIN = 0 or VDD
(Note 10)
SHDN Input High Voltage
VSH
MIN TYP MAX UNITS
2.0
V
3.0
0.8
V
0.2
V
±0.01 ±1
µA
15
pF
VDD -
0.4
V
SHDN Input Mid Voltage
VSM
1.1
VDD -
1.1
V
SHDN Input Low Voltage
SHDN Input Current
SHDN Voltage, Unconnected
SHDN Maximum Allowed
Leakage, Mid Input
VSL
IS
VFLT
SHDN = 0 or VDD
SHDN = unconnected
SHDN = unconnected
0.4
V
±4.0
µA
VDD/2
V
±100
nA
DIGITAL OUTPUTS (DOUT, SSTRB)
Output-Voltage Low
VOL
ISINK = 5mA
ISINK = 16mA
0.4
V
0.8
Output-Voltage High
VOH ISOURCE = 0.5mA
VDD -
0.5
V
Three-State Leakage Current
Three-State Output Capacitance
IL
COUT
CS = VDD
CS = VDD (Note 10)
±0.01 ±10
µA
15
pF
POWER REQUIREMENTS
Positive Supply Voltage
VDD
2.70
5.25
V
Operating mode, full-scale VDD = 5.25V
input (Note 11)
VDD = 3.6V
1.6
3.0
mA
1.2
2.0
Positive Supply Current
IDD
Full power-down
VDD = 5.25V
VDD = 3.6V
3.5
15
1.2
10
µA
Fast power-down (MAX149)
30
70
Supply Rejection (Note 12)
PSR
Full-scale input, external reference =
2.500V, VDD = 2.7V to 5.25V
±0.3
mV
4 _______________________________________________________________________________________
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