Low-Power, 8-Channel,

Serial 10-Bit ADC

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3

ELECTRICAL CHARACTERISTICS (continued)

Internal compensation

0mA to 0.5mA output load

(Note 5)

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

0

mV

2.5

Load Regulation (Note 8)

ppm/°C

±30

VREF Tempco

mA

30

VREF Short-Circuit Current

V

4.066

4.096

4.126

VREF Output Voltage

pF

16

Input Capacitance

µA

±0.01

±1

Multiplexer Leakage Current

V

-2

2

Analog Input Voltage

(Note 6)

0

0

0

MHz

10

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

50mV

V

Input Current

200

350

µA

Input Resistance

12

20

k

Ω

Shutdown VREF Input Current

1.5

10

µA

Buffer Disable Threshold

REFADJ

50mV

V

Unipolar

Differential range

Internal compensation mode

0

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