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3

1.5V to 3.6V, 416ksps, 1-Channel True-Differential/

2-Channel Single-Ended, 8-Bit, SAR ADCs

ELECTRICAL CHARACTERISTICS (continued)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

Throughput Rate

12 clocks per conversion, includes power-

up acquisiton and conversion time

416

ksps

Power-Up and Acquisition Time

Three SCLK cycles

600

ns

Aperture Delay

8ns

Aperture Jitter

30

ps

Serial-Clock Frequency

0.1

5.0

MHz

ANALOG INPUTS (AIN+, AIN-, AIN1, AIN2)

Unipolar

0

Input Voltage Range

Bipolar, MAX1391 only, (AIN+ - AIN-)

V

Common-Mode Input Voltage

Range

Bipolar, MAX1391 only, [(AIN+) + (AIN-)] / 2

0

V

Input Leakage Current

Channel not selected, or conversion

stopped, or in shutdown mode

±1.5

µA

Input Capacitance

16

pF

REFERENCE INPUT (REF)

REF Input Voltage Range

0.6

0.05

V

REF Input Capacitance

24

pF

REF DC Leakage Current

0.025

±2.5

µA

REF Input Dynamic Current

416ksps

20

60

µA

DIGITAL INPUTS (SCLK,

CS, OE, CH1/CH2, UNI/BIP)

Input-Voltage Low

0.3 x

V

Input-Voltage High

0.7 x

V

Input Hysteresis

0.06 x

V

Input Leakage Current

±1

µA

CS, OE

1

Input Capacitance

CH1/CH2, UNI/BIP

12.5

pF

DIGITAL OUTPUT (DOUT)

Output-Voltage Low

0.1 x

V

Output-Voltage High

0.9 x

V

Tri-State Leakage Current

±1

µA

Tri-State Output Capacitance

10

pF

POWER SUPPLY

Positive Supply Voltage

1.5

3.6

V