ADS1258IPHPREP datasheet(4/57 Pages) TI

4 / 57 page

ADS1258-EP

SBAS445C – MARCH 2009 – REVISED DECEMBER 2009

www.ti.com

ELECTRICAL CHARACTERISTICS (continued)

All specifications at TA = –55°C to 125°C, AVDD = 2.5 V, AVSS = –2.5 V, DVDD = 3.3 V, fCLK = 16 MHz (external clock) or

fCLK = 15.729 MHz (internal clock), OPA227 buffer between MUX outputs and ADC inputs, VREF = 4.096 V, and VREFN =

–2.5 V, unless otherwise noted.

PARAMETER

CONDITIONS

MIN

TYP(1)

MAX

UNIT

VIH

0.7 DVDD

DVDD

VIL

DGND

0.3 DVDD

Logic Levels

VOH

IOH = 2 mA

0.8 DVDD

DVDD

VOL

IOL = 2 mA

DGND

0.2 DVDD

Input Leakage

VIN = DVDD, GND

μA

Frequency

0.1

MHz

Master Clock Input (CLKIO)

Duty Cycle

Crystal Frequency

32.768

kHz

Clock Output Frequency

15.729

MHz

Crystal Oscillator

(see the Crystal Oscillator

Start-Up Time (Clock Output

150

section)

Valid)

Clock Output Duty Cycle

Power Supply

DVDD

2.7

5.25

AVSS

–2.6

AVDD

AVSS + 4.75

AVSS + 5.25

External

TA = –40°C to 105°C

0.25

0.6

Clock

TA = –55°C to 125°C

0.25

0.75

Operation

Internal Oscillator Operation,

0.04

DVDD Supply Current

Clock Output Disabled

Internal Oscillator Operation,

1.4

Clock Output Enabled(4)

Power-Down(5)

µA

Converting

8.2

Standby

5.6

AVDD, AVSS Supply Current

Sleep

2.1

Power-Down

µA

Converting

Standby

Power Dissipation

Sleep

Power-Down

μW

(4)

CLKIO load = 20 pF.

(5)

No clock applied to CLKIO.

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