EMC1701 datasheet(13/54 Pages) SMSC

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High-Side Current-Sense and Internal 1°C Temperature Monitor

Datasheet

SMSC EMC1701

Revision 1.2 (09-27-10)

DATASHEET

APPLICATION NOTE: The EMC1701 is trimmed at the 80mV range for best accuracy.

2.2

SMBus Electrical Specifications

Threshold Accuracy

(±)

VTH_ERR

VTH = 80mV

INTERNAL TEMPERATURE MONITOR

Temperature

Accuracy (±)

0.25

°C

-5°C < TA < 85°C

°C

-40°C < TA < 85°C

Temperature

Resolution

0.125

°C

CONVERSION TIMES

First Conversion

Ready

tCONV_T

180

300

Time after power up before

temperature and voltage

measurements updated and

PRATIO updated

SMBus Delay

tSMB_D

Time before SMBus

communications should be sent

by host

DIGITAL I/O PINS (SMCLK, SMDATA, THERM, ALERT)

Input High Voltage

VIH

2.0

SMCLK, SMDATA

OD pins pulled up to VPULLUP

Input Low Voltage

VIL

0.8

Output Low Voltage

VOL

0.4

OD pin pulled to VPULLUP

4 mA current sink

Table 2.3 SMBus Electrical Specifications

VDD= VBUS = 3V to 24V, VPULLUP = 3V to 5.5V, TA = -40°C to 85°C Typical values are at TA = 27°C unless

otherwise noted.

CHARACTERISTIC

SYMBOL

MIN

TYP

MAX

UNITS

CONDITIONS

SMBUS INTERFACE

Input Capacitance

CIN

410

SMBUS TIMING

Clock Frequency

fSMB

400

kHz

Spike Suppression

tSP

Table 2.2 Electrical Specifications (continued)

VDD = VBUS = 3V TO 24V, VPULLUP = 3V TO 5.5V, TA = -40°C TO 85°C,

ALL TYPICAL VALUES AT VDD = VPULLUP = 3.3V, VBUS = 12V, AND TA = 27°C UNLESS OTHERWISE NOTED.

CHARACTERISTIC

SYMBOL

MIN

TYP

MAX

UNIT

CONDITIONS

EMC1701 Datasheet(PDF) 13 Page - SMSC Corporation

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