TMP411DEDDFR datasheet(35/61 Pages) TI2

35 / 61 page

If AL or TH = 1, the ALERT /THERM2 pin implements a THERM function ( THERM2). In this mode, THERM2

functions similarly to the THERM pin, except that the local high limit and remote high limit registers are used for

the thresholds. THERM2 goes low when RHIGH or LHIGH is set.

The temperature range is set by configuring bit 2 of the Configuration Register. Setting this bit low configures

the TMP411/TMP411D device for the standard measurement range (0°C to 127°C). Temperature conversions

are stored in the standard binary format. Setting bit 2 high configures the TMP411/TMP411D for the extended

measurement range (−55°C to +150°C). Temperature conversions are stored in the extended binary format, as

listed in Table 7-1.

The remaining bits of the Configuration Register are reserved and must be set to 0. The power-on-reset value for

this register is 00h. Table 8-3 lists the Configuration Register bits.

Table 8-3. Configuration Register Bit Descriptions

CONFIGURATION REGISTER (READ = 03h, WRITE = 09h, POR = 00h)

BIT

NAME

FUNCTION

POWER-ON-RESET VALUE

MASK

0 = ALERT enabled

1 = ALERT masked

0 = Run

1 = Shutdown

AL or TH

0 = ALERT mode

1 = THERM mode

4, 3

Reserved

—

Temperature range

0 = 0°C to 127°C

1 = –55°C to 150°C

1, 0

Reserved

—

8.7 Resolution Register

The RES1 and RES0 bits (resolution bits 1 and 0) of the Resolution Register set the resolution of the local

temperature measurement channel. Remote temperature measurement channel resolution is not effected.

Changing the local channel resolution affects the conversion time and rate of the TMP411 only. The Resolution

resolution bits for the Resolution Register.

Table 8-4. Resolution Register: Local Channel Programmable Resolution

RESOLUTION REGISTER (READ = 1Ah, WRITE = 1Ah, POR = 1Ch)

RES1

RES0

RESOLUTION

CONVERSION TIME

(TYPICAL)

TMP411 (Legacy chip)

CONVERSION TIME

(TYPICAL)

TMP411 (New chip)

TMP411D

9 Bits (0.5°C)

12.5ms

17.7ms

10 Bits (0.25°C)

25ms

17.7ms

11 Bits (0.125°C)

50ms

17.7ms

12 Bits (0.0625°C)

100ms

17.7ms

Bits 2 through 4 of the resolution register must be set to 1. Bits 5 through 7 of the resolution register must be set

to 0. The power-on-reset value of this register is 1Ch.

8.8 Conversion Rate Register

The Conversion Rate Register controls the rate at which temperature conversions are performed. The register

adjusts the idle time between conversions but not the conversion timing, which allows the TMP411/TMP411D

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TMP411, TMP411D

SBOS383E – DECEMBER 2006 – REVISED JULY 2025

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