7 Detailed Description

7.1 Overview

The TMP110 is a digital output temperature sensor that comes factory calibrated for accuracy. The device

features a two-wire, SMBus and I2C compatible interface with two modes of operation: continuous conversion

mode and one-shot conversion mode, designed for thermal management and thermal protection applications.

The TMP110 also includes an alert status register with individual high and low thresholds. Depending on the

application requirement the 5th pin is either a device address input pin for multiple devices on the same bus or

an open-drain alert output pin for thermal switch application.

7.2 Functional Block Diagram

SCL

GND

SDA

Digital Core

Temperature

sensor circuit

ADD0

Oscillator

Register Bank

ADC

Internal

thermal

BJT

V+

Figure 7-1. Address Variant

SCL

GND

SDA

Digital Core

Temperature

sensor circuit

Oscillator

Register Bank

ADC

Internal

thermal

BJT

V+

ALERT

Figure 7-2. Alert Variant

7.3 Feature Description

7.3.1 Digital Temperature Output

The digital output from each temperature measurement is stored in the read-only temperature register. The

temperature register of the TMP110 device is configured as a 12-bit, read-only register (configuration register

EM bit = 0), or as a 13-bit, read-only register (configuration register EM bit = 1) that stores the output of the most

recent conversion. Note that the EM bit defaults to 0 (12-bit format). As this value limits the highest temperature

digital code, the device output is as shown in Table 7-1.

TMP110

SNIS233 – FEBRUARY 2024

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