MAX1242BCSA datasheet(3/12 Pages) MAXIM

Part #	MAX1242BCSA

Description	2.7V to %.25V, Low-Power, 10-Bit Serial ADCs in SO-8

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Manufacturer	MAXIM [Maxim Integrated Products]

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+2.7V to +5.25V, Low-Power, 10-Bit

Serial ADCs in SO-8

_______________________________________________________________________________________

3

ELECTRICAL CHARACTERISTICS (continued)

(VDD = +2.7V to +5.25V; 73ksps; fSCLK = 2.1MHz (50% duty cycle); MAX1242—4.7µF capacitor at REF pin, MAX1243—external

reference; VREF = 2.5V applied to REF pin; TA = TMIN to TMAX; unless otherwise noted.)

Capacitive Bypass at REF

4.7

µF

Load Regulation (Note 5)

0.35

mV

0mA to 0.2mA output load

REF Temperature Coefficient

±30

ppm/°C

MAX1242

REF Short-Circuit Current

30

mA

REF Output Voltage

2.470

2.500

2.530

V

TA = +25°C (Note 4)

Power-Supply Rejection (Note 7)

PSR

VDD = VDD(min) to VDD(max), full-scale input

1.00

VDD +

50mV

Supply Current

IDD

3.0

0.8

VDD > 3.6V

ISINK = 16mA

Output Voltage High

SCLK, CS Input High Voltage

VIH

2.0

V

SCLK, CS Input Low Voltage

Capacitive Bypass at REF

0.1

µF

VIL

0.8

VDD ≤ 3.6V

V

VOH

VDD - 0.5

V

Three-State Leakage Current

IL

±0.01

±10

ISOURCE = 0.5mA

µA

CS = VDD

Three-State Output Capacitance

COUT

15

pF

CS = VDD (Note 6)

Output Voltage Low

VOL

0.4

V

PARAMETER

SYMBOL

MIN

TYP

MAX

UNITS

ISINK = 5MA

SHDN Input Mid Voltage

VSM

1.1

VDD - 1.1

V

SHDN Voltage, Floating

VFLT

VDD / 2

V

SHDN Max Allowed Leakage,

Mid Input

±100

SHDN = float

nA

SHDN = float

SCLK, CS Input Capacitance

Input Voltage Range

V

CIN

15

pF

SHDN Input High Voltage

VSH

VDD - 0.4

(Note 6)

V

SHDN Input Low Voltage

VSL

0.4

V

Input Resistance

SHDN Input Current

±4.0

18

25

k

Ω

REF Input Current in Shutdown

µA

SHDN = 0V or VDD

SCLK, CS Input Hysteresis

VHYST

±0.01

10

µA

SHDN = 0V

CONDITIONS

Input Current

0.2

V

SCLK, CS Input Leakage

IIN

±0.01

±1

100

150

µA

VIN = 0V or VDD

Operating mode (MAX1242)

VDD = 5.25V

Operating mode (MAX1243)

VDD = 5.25V

VDD = 3.6V

Power-down

VDD = 5.25V

VDD = 3.6V

Supply Voltage

VDD

V

VDD = 3.6V

1.9

10

3.5

15

±0.3

1.6

2.5

0.9

1.5

1.8

3.0

1.4

2.0

2.7

5.25

mA

µA

mV

Operating mode (MAX1242)

EXTERNAL REFERENCE (VREF = 2.5V)

INTERNAL REFERENCE (MAX1242 only)

DIGITAL INPUTS: SCLK, C

CS

S, S

SH

HD

DN

N

DIGITAL OUTPUT: DOUT

POWER REQUIREMENTS

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