MAX1108 datasheet(6/20 Pages) MAXIM

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µA

Single-Supply, Low-Power,

2-Channel, Serial 8-Bit ADCs

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ELECTRICAL CHARACTERISTICS—MAX1109 (continued)

(VDD = +4.5V to +5.5V; unipolar input mode; COM = GND, fSCLK = 500kHz, external clock (50% duty cycle); 10 clocks/conversion

cycle (50ksps); 1µF capacitor at REF, external +4.096V reference at REF; TA = TMIN to TMAX; unless otherwise noted. Typical values

are at TA = +25°C.)

CS = VDD

COUT

Three-State Output Capacitance

µA

±0.01

±10

Three-State Leakage Current

Figure 1, CLOAD = 100pF

Figure 2, CLOAD = 100pF

240

tDV

CS Fall to Output Enable

CONDITIONS

200

tDO

SCLK Fall to Output Data Valid

240

tTR

CS Rise to Output Disable

100

tDS

DIN to SCLK Setup Time

µs

1.0

tACQ

Acquisition Time

tDH

DIN to SCLK Hold Time

UNITS

MIN

TYP

MAX

SYMBOL

PARAMETER

ISINK = 5mA

ISINK = 16mA

0.4

4.5

5.5

VDD

Supply Voltage

0.8

VOL

Output Low Voltage

VDD = 4.5V to 5.5V,

CL = 10pF,

full-scale input

130

250

Power down, VDD = 4.5V to 5.5V (Note 9)

0.5

2.5

External reference = +4.096V,

full-scale input, VDD = 4.5V to 5.5V

±0.4

±4

PSR

Power-Supply Rejection (Note 10)

0.2

VHYST

Input Hysteresis

0.8

VIL

Threshold Voltage Low

VIH

Threshold Voltage High

µA

±1

IIH

Input Current High

CIN

Input Capacitance

ISOURCE = 0.5mA

VDD - 0.5

VOH

Output High Voltage

µA

±1

IIL

Input Current Low

IDD

µA

Supply Current (Notes 2, 8)

Internal reference

External reference

POWER REQUIREMENTS

DIGITAL INPUTS (DIN, SCLK, and CS)

DIGITAL OUTPUT (DOUT)

TIMING CHARACTERISTICS (Figures 8, 9, and 10)

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