THMC50SSOPDBQ datasheet(6/32 Pages) TI

6 / 32 page

THMC50

REMOTE/LOCAL TEMPERATURE MONITOR AND

FAN CONTROLLER WITH SMBus INTERFACE

SLIS090 – JULY 1999

POST OFFICE BOX 655303

• DALLAS, TEXAS 75265

dc electrical characteristics, VCC3 = V(VCC3AUX) = 3.3 V, TA = 25°C (unless otherwise noted)

(continued)

analog output: FAN_SPD/NTEST_IN

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNITS

VOUT

Output voltage range

2.5

Total unadjusted error (TUE) (see Note 5)

IL = –2 mA

–3%

Full-scale error

–3%

±1%

Zero error, LSB

No load

Differential nonlinearity (DNL), LSB (monotonic by design)

DAC setting

× 16 to 0 × FF

–1

Integral nonlinearity, LSB

±1

C(LOAD)

Maximum external load capacitance allow to insure DAC

stability

Design parameter only –

not tested

I(SOURCE) Output source current

DAC setting

× 16 to 0 × FF

–2

I(SINK)

Output sink current

DAC setting

× 16 to 0 × FF

NOTE 5: Total unadjusted error (TUE) includes offset, gain, and linearity errors of the DAC.

remote thermal diode sensing

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNITS

T(RES)

Temperature resolution

°C

I(DIODE)

Diode source current

REMOTE_DIODE+ = REMOTE_DIODE– + 0.65 V,

high level

130

µA

(DIODE)

Low level

I(RATIO)

Diode source current ratio

High level/low level

9.8

10.2

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