TMP411CD datasheet(20/61 Pages) TI2

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7.2 Functional Block Diagram

V+

SDA

D+

Control Logic

Oscillator

Internal

thermal

BJT

SCL

Serial Interface

GND

ADC

Bank

D-

THERM

Resistor

Decoder

Voltage

Regulator

n2×ID

n1×ID

ALERT /

THERM2

7.3 Feature Description

7.3.1 Series Resistance Cancellation

Figure 7-1 shows series resistance in an application circuit that results from printed circuit board (PCB) trace

resistance and remote line length. The TMP411/TMP411D automatically cancels the resistance, which prevents

a temperature offset.

The TMP411/TMP411D device cancels up to 3kΩ of series line resistance that eliminates the need for additional

characterization and temperature offset correction.

See Figure 6-8 (Figure 6-9 for new chip), Figure 6-10 (Figure 6-11 for new chip), Figure 6-25 and Figure 6-26 for

details on the effect of series resistance and power-supply voltage on sensed remote temperature error.

7.3.2 Differential Input Capacitance

The TMP411/TMP411D tolerates differential input capacitance of up to 1000pF with minimal change in

temperature error. The effect of capacitance on sensed remote temperature error is shown in Figure 6-12 (Figure

6-13 for new chip) and Figure 6-27.

7.3.3 Temperature Measurement Data

Temperature measurement data is taken over a default range of 0°C to 127°C for local and remote locations.

Measurements from –55°C to 150°C can be made locally and remotely by reconfiguring the TMP411/TMP411D

device for the extended temperature range. To change the TMP411/TMP411D configuration from the standard to

the extended temperature range, switch bit 2 (RANGE) of the Configuration Register from low to high.

TMP411, TMP411D

SBOS383E – DECEMBER 2006 – REVISED JULY 2025

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