MAX192BCAP datasheet(3/24 Pages) MAXIM

3 / 24 page

Low-Power, 8-Channel,

Serial 10-Bit ADC

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ELECTRICAL CHARACTERISTICS (continued)

(VDD = 5V ±5%, fCLK = 2.0MHz, external clock (50% duty cycle), 15 clocks/conversion cycle (133ksps), 4.7µF capacitor at VREF pin,

TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.)

Internal compensation

0mA to 0.5mA output load

TA = +25°C (Note 7)

(Note 5)

On/off leakage current; VIN = 0V, 5V

Bipolar

Used for data transfer only

Internal compensation (Note 5)

External compensation, 4.7µF

Single-ended range (unipolar only)

Common-mode range (any input)

CONDITIONS

2.5

Load Regulation (Note 8)

ppm/°C

±30

VREF Tempco

VREF Short-Circuit Current

4.066

4.096

4.126

VREF Output Voltage

Input Capacitance

µA

±0.01

±1

Multiplexer Leakage Current

-VREF

+VREF

-2

Analog Input Voltage

(Note 6)

VREF

VDD

MHz

External Clock Frequency

0.1

0.4

0.1

2.0

UNITS

MIN

TYP

MAX

SYMBOL

PARAMETER

Capacitive Bypass at VREF

External compensation

4.7

µF

Internal compensation

0.01

Capacitive Bypass at REFADJ

External compensation

0.01

µF

REFADJ Adjustment Range

±1.5

Input Voltage Range

2.5

VDD +

50mV

Input Current

200

350

µA

Input Resistance

Ω

Shutdown VREF Input Current

1.5

µA

Buffer Disable Threshold

REFADJ

VDD -

50mV

Unipolar

Differential range

Internal compensation mode

Capacitive Bypass at VREF

External compensation mode

4.7

µF

Reference-Buffer Gain

1.678

V/V

REFADJ Input Current

±50

µA

ANALOG INPUT

INTERNAL REFERENCE (reference buffer enabled)

EXTERNAL REFERENCE AT VREF (buffer disabled, VREF = 4.096V)

EXTERNAL REFERENCE AT REFADJ

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