TMP400 datasheet(3/25 Pages) TI

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ELECTRICAL CHARACTERISTICS

TMP400

SBOS404 – DECEMBER 2007

At TA = –40°C to +125°C and VS = 2.7V to 5.5V, unless otherwise noted.

TMP400

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNIT

TEMPERATURE ERROR

Local Temperature Sensor

TELOCAL

TA = –40°C to +125°C

±1.25

±2.5

°C

VS = 3.3V, TA = +15°C to +85°C

±0.0625

±1

°C

Remote Temperature Sensor(1)(2)

TEREMOTE

VS = 3.3V, TA = +15°C to +75°C, TD = –40°C to +125°C

(3)

±0.0625

±1

°C

VS = 3.3V, TA = –40°C to +100°C, TD = –40°C to +125°C

(3)

±1

±3

°C

TA = –40°C to +125°C, TD = –40°C to +125°C

(3)

±3

±10

°C

vs Supply

Local/Remote

VS = 2.7V to 5.5V

±0.2

±0.5

°C/V

TEMPERATURE MEASUREMENT

Conversion Time (per channel)(4)

105

115

125

Resolution

Local Temperature Sensor (programmable)

Bits

Remote Temperature Sensor

Bits

Remote Sensor Source Currents

High

Series Resistance 3k

Ω Maximum

120

µA

Medium High

µA

Medium Low

µA

Low

µA

Remote Transistor Ideality Factor

TMP400 Optimized Ideality Factor

1.008

SMBus INTERFACE

Logic Input High Voltage (SCL, SDA)

VIH

2.1

Logic Input Low Voltage (SCL, SDA)

VIL

0.8

Hysteresis

500

SMBus Output Low Sink Current

Logic Input Current

–1

µA

SMBus Input Capacitance (SCL, SDA)

SMBus Clock Frequency

3.4

MHz

SMBus Timeout

SCL Falling Edge to SDA Valid Time

µs

DIGITAL OUTPUTS

Output Low Voltage

VOL

IOUT = 6mA

0.15

0.4

High-Level Output Leakage Current

IOH

VOUT = VS

0.1

µA

ALERT Output Low Sink Current

ALERT Forced to 0.4V

POWER SUPPLY

Specified Voltage Range

2.7

5.5

Quiescent Current

0.0625 Conversions per Second

µA

Eight Conversions per Second

420

525

µA

Serial Bus Inactive, Shutdown Mode

µA

Serial Bus Active, fS = 400kHz, Shutdown Mode

µA

Serial Bus Active, fS = 3.4MHz, Shutdown Mode

350

µA

Undervoltage Lock Out

2.3

2.4

2.6

Power-On Reset Threshold

POR

1.6

2.3

TEMPERATURE RANGE

Specified Range

–40

+125

°C

Storage Range

–60

+130

°C

Thermal Resistance, QSSOP

°C/W

(1)

Tested with less than 5

Ω effective series resistance and 100pF differential input capacitance.

(2)

RC = '1'.

(3)

TD is the remote temperature measured at the diode.

(4)

RES1 = '1' and RES0 = '1' for 12-bit resolution.

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