TMP435 datasheet(3/35 Pages) TI1

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TMP435

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SBOS495A – MARCH 2010 – REVISED APRIL 2010

ELECTRICAL CHARACTERISTICS

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

TMP435

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNIT

TEMPERATURE ERROR

Local Temperature Sensor

TELOCAL

TA = –40°C to +125°C

±1.25

±2.5

°C

TA = +0°C to +100°C, VS = 3.3V

±0.25

±1

°C

Remote Temperature Sensor(1)

TEREMOTE

TA = 0°C to +100°C, TDIODE = –40°C to +150°C, VS = 3.3V

±0.25

±1

°C

TA = –40°C to +100°C, TDIODE = –40°C to +150°C, VS = 3.3V

±0.5

±1.5

°C

TA = –40°C to +125°C, TDIODE = –40°C to +150°C

±3

±5

°C

vs Supply (Local/Remote)

VS = 2.7V to 5.5V

±0.2

±0.5

°C/V

TEMPERATURE MEASUREMENT

Conversion Time (per channel)

Local Channel

Remote Channel

RC = 1

126

137

MBeta Correction Enabled (2)

RC = 0

RC = 1

100

MBeta Correction Disabled (3)

RC = 0

Resolution

Local Channel

Bits

Remote Channel

Bits

Remote Sensor Source Currents

High

120

Series Resistance (beta correction) (4)

Medium High

Medium Low

Low

Remote Transistor Ideality Factor

TMP435 optimized ideality factor

1.000(2)

1.008(3)

Beta Correction Range

0.1

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

SDA Output Low Voltage

VOL

IOUT = 6mA

0.15

0.4

Logic Input Current

≤ VIN ≤ 6V

–1

SMBus Input Capacitance (SCL, SDA)

SMBus Clock Frequency

3.4

MHz

SMBus Timeout

SCL Falling Edge to SDA Valid Time

DIGITAL OUTPUTS

Output Low Voltage

VOL

IOUT = 6mA

0.15

0.4

High-Level Output Leakage Current

IOH

VOUT = VS

0.1

ALERT/THERM2 Output Low Sink Current

ALERT/THERM2 Forced to 0.4V

THERM Output Low Sink Current

THERM2 Forced to 0.4V

(1)

Tested with less than 5

Ω effective series resistance and 100pF differential input capacitance. TA is the ambient temperature of the

TMP435. TDIODE is the temperature at the remote diode sensor.

(2)

Beta correction configuration set to '1000' and sensor is GND collector-connected (PNP collector to ground).

(3)

Beta correction configuration set to '0111' or sensor is diode-connected (base shorted to collector).

(4)

If beta correction is disabled ('0111'), then up to 1k

Ω of series line resistance is cancelled; if beta correction is enabled ('1xxx'), up to

300

Ω is cancelled.

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