Low-Power, 14-Bit Analog-to-Digital Converters

with Parallel Interface

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3

ELECTRICAL CHARACTERISTICS (continued)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

INTERNAL REFERENCE

REF Output Voltage

4.056

4.096

4.136

V

REF Output Tempco

±35

ppm/°C

REF Short-Circuit Current

±10

mA

Capacitive Bypass at REFADJ

0.1

µF

Capacitive Bypass at REF

1µF

REFADJ Input Leakage Current

20

µA

EXTERNAL REFERENCE

REFADJ Buffer Disable

Threshold

To power-down the internal reference

0.4

0.1

V

REF Input Voltage Range

Internal reference disabled (Note 3)

3.8

0.2

V

14

25

REF Input Current

Shutdown mode

±0.1

µA

DIGITAL INPUTS/OUTPUTS (

CS, R/C, EOC, D0–D13, RESET, HBEN)

Input High Voltage

0.7 x

Input Low Voltage

0.3 x

V

Input Leakage Current

±0.1

±1

µA

Input Hysteresis

0.1

V

Input Capacitance

15

pF

Output High Voltage

0.4

V

Output Low Voltage

0.4

V

Three-State Leakage Current

D0–D13

±0.1

±10

µA

Three-State Output

Capacitance

15

pF

POWER REQUIREMENTS

Analog Supply Voltage

4.75

5.25

V

Digital Supply Voltage

2.7

V

165ksps

3.2

3.6

100ksps

2.6

10ksps

1.9

Internal reference

1ksps

1.8

165ksps

2.4

2.8

100ksps

1.8

10ksps

0.8

Analog Supply Current

External reference

1ksps

0.2

mA