7 Detailed Description

7.1 Overview

The TMP461-EP device is a digital temperature sensor that combines a local temperature measurement channel

and a remote-junction temperature measurement channel in a single VSSOP-10 package. The device is two-

wire and SMBus-interface–compatible with nine pin-programmable bus address options, and is specified over a

temperature range of –55°C to 125°C. The TMP461-EP device also contains multiple registers for programming

and holding configuration settings, temperature limits, and temperature measurement results.

7.2 Functional Block Diagram

TMP461-EP

SCL

SDA

THERM

D+

D–

V+

GND

ALERT/THERM2

6 x I

16 x I

Internal

BJT

ADC

Control Logic

Register Bank

Serial Interface

Oscillator

I

A0

A1

Figure 7-1. Functional Block Diagram

7.3 Feature Description

7.3.1 Temperature Measurement Data

The local and remote temperature sensors have a resolution of 12 bits (0.0625°C). Temperature data that

result from conversions within the default measurement range are represented in binary form, as shown in the

Standard Binary column of Table 7-1. Any temperatures above 127°C result in a value that rails to 127.9375

(7FFh). The device can be set to measure over an extended temperature range by changing bit 2 (RANGE) of

the configuration register from low to high. The change in measurement range and data format from standard

binary to extended binary occurs at the next temperature conversion. For data captured in the extended

temperature range configuration, an offset of 64 (40h) is added to the standard binary value, as shown in the

Extended Binary column of Table 7-1. This configuration allows measurement of temperatures as low as –64°C,

and as high as 191°C; however, most temperature-sensing diodes only operate within the range of –55°C to

150°C. Additionally, the TMP461-EP is specified only for ambient temperatures ranging from –55°C to 125°C;

parameters in the Section 6.1 table must be observed.

TMP461-EP

SNIS241 – SEPTEMBER 2025

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