MAX148_09 datasheet(4/23 Pages) MAXIM

Part #	MAX148

Description	2.7V to 5.25V, Low-Power, 8-Channel, Serial 10-Bit ADCs

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Manufacturer	MAXIM [Maxim Integrated Products]

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+2.7V to +5.25V, Low-Power, 8-Channel,

Serial 10-Bit ADCs

4 ______________________________________________________________________________________

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

CONDITIONS

MIN

TYP

MAX

UNITS

DIGITAL INPUTS (DIN, SCLK, CS, SHDN)

DIN, SCLK, CS Input High Voltage

VIH

VDD ≤ 3.6V

2.0

V

VDD > 3.6V

3.0

DIN, SCLK, CS Input Low Voltage

VIL

0.8

V

DIN, SCLK, CS Input Hysteresis

VHYST

0.2

V

DIN, SCLK, CS Input Leakage

IIN

VIN = 0 or VDD

±0.01

±1

μA

DIN, SCLK, CS Input Capacitance

CIN

(Note 10)

15

pF

SHDN Input High Voltage

VSH

VDD -

0.4

V

SHDN Input Mid Voltage

VSM

1.1

VDD -

1.1

V

SHDN Input Low Voltage

VSL

0.4

V

SHDN Input Current

IS

SHDN = 0 or VDD

±4.0

μA

SHDN Voltage, Unconnected

VFLT

SHDN = unconnected

VDD/2

V

SHDN Maximum Allowed

Leakage, Mid Input

SHDN = unconnected

±100

nA

DIGITAL OUTPUTS (DOUT, SSTRB)

Output-Voltage Low

VOL

ISINK = 5mA

0.4

V

ISINK = 16mA

0.8

Output-Voltage High

VOH

ISOURCE = 0.5mA

VDD -

0.5

V

Three-State Leakage Current

IL

CS = VDD

±0.01

±10

μA

Three-State Output Capacitance

COUT

CS = VDD (Note 10)

15

pF

POWER REQUIREMENTS

Positive Supply Voltage

VDD

2.70

5.25

V

Positive Supply Current

IDD

Operating mode, full-scale

input (Note 11)

VDD = 5.25V

1.6

3.0

mA

VDD = 3.6V

1.2

2.0

Full power-down

VDD = 5.25V

3.5

15

μA

VDD = 3.6V

1.2

10

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

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