UCD9244RGCT datasheet(4/40 Pages) TI2

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UCD9244

SLVSAL6A

– NOVEMBER 2010 – REVISED FEBRUARY 2011

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ELECTRICAL CHARACTERISTICS (Continued)

over operating free-air temperature range (unless otherwise noted)

PARAMETER

TEST CONDITIONS

MIN

NOM

MAX

UNIT

DIGITAL INPUTS/OUTPUTS

Dgnd

VOL

Low-level output voltage

IOL = 6 mA

(1), V

33DIO = 3 V

+0.25

V33DIO

VOH

High-level output voltage

IOH = -6 mA

(2), V

33DIO = 3 V

–0.6V

VIH

High-level input voltage

V33DIO = 3V

2.1

3.6

VIL

Low-level input voltage

V33DIO = 3.5 V

1.4

SYSTEM PERFORMANCE

VRESET

Voltage where device comes out of reset

V33D Pin

2.3

2.4

tRESET

Pulse width needed for reset

nRESET pin

µs

Vref commanded to be 1V, at 25

°C AFEgain = 4,

Setpoint Reference Accuracy

–10

1V input to EAP/N measured at output of the

EADC(3)

VRefAcc

Setpoint Reference Accuracy over

–40°C to 125°C

–20

temperature

AFEgain = 4 compared to

VDiffOffset

Differential offset between gain settings

–4

AFEgain = 1, 2, or 8

240 + 1

tDelay

Digital Compensator Delay

240

switching

cycle

FSW

Switching Frequency

15.260

2000

kHz

Accuracy

–5%

Duty

Max and Min Duty Cycle

100%

V33Slew

Minimum V33 slew rate

V33 slew rate between 2.3V and 2.9V

0.25

V/ms

tretention

Retention of configuration parameters

TJ = 25 °C

100

Years

Write_Cycles

Number of nonvolatile erase/write cycles

TJ = 25 °C

K cycles

All rails configured to accept VID messages(4)

RateVID

Max VID message rate

All rails configured to accept 6-bit VID messages(4)

msg/msec

All rails configured to accept 8-bit VID messages(5)

(1)

The maximum IOL, for all outputs combined, should not exceed 12 mA to hold the maximum voltage drop specified.

(2)

The maximum IOH, for all outputs combined, should not exceed 48 mA to hold the maximum voltage drop specified.

(3)

With default device calibration. PMBus calibration can be used to improve the regulation tolerance.

(4)

VID message rate on each interface. Measured over a 1.0 msec interval

(5)

VID message rate on PMBus interface.

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