TMP112 datasheet(22/46 Pages) TI2

22 / 46 page

Frame 1 SMBus ALERT Response Address Byte

Frame 2 Target Address from Device

Start By

Controller

ACK By

Device

From

Device

NACK By

Controller

Stop By

Controller

SDA

SCL

ALERT

R/W

Status

The values of A0 and A1 are determined by the ADD0 pin.

Figure 7-6. Timing Diagram for SMBus ALERT

7.4 Device Functional Modes

7.4.1 Continuous-Conversion Mode

The default mode of the TMP112-Q1/TMP112D-Q1 device is continuous conversion mode. During continuous-

conversion mode, the ADC performs continuous temperature conversions and stores each results to the

temperature register, overwriting the result from the previous conversion. The conversion rate bits, CR1 and

CR0, configure the TMP112-Q1/TMP112D-Q1 device for conversion rates of 0.25Hz, 1Hz, 4Hz, or 8Hz. The

default rate is 4Hz. The TMP112-Q1 device has a typical conversion time of 26ms while TMP112D-Q1 has a

typical conversion time of 10ms. To achieve different conversion rates, the TMP112-Q1/TMP112D-Q1 device

makes a conversion and then powers down and waits for the appropriate delay set by CR1 and CR0. Table 7-5

lists the settings for CR1 and CR0.

Table 7-5. Conversion Rate Settings

CR1

CR0

CONVERSION RATE

0.25Hz

1Hz

4Hz (default)

8Hz

After a power up or general-call reset, the TMP112-Q1/TMP112D-Q1 device immediately begins a conversion

as shown in Figure 7-7. The first result is available after 26ms (typical) for TMP112-Q1 and 10ms (typical)

for TMP112D-Q1. The active quiescent current during conversion is 40μA (typical at 27°C) for TMP112-Q1

and 55μA (typical at 27°C) for TMP112D-Q1. The quiescent current during delay is 2.2μA (typical at 27°C) for

TMP112-Q1 and 2.6μA (typical at 27°C) for TMP112D-Q1.

Start of

Conversion

Startup

Delay

(1)

26ms /10ms

The delay is set by CR1 and CR0 bits in the configuration register.

Figure 7-7. Conversion Start

TMP112-Q1, TMP112D-Q1

SLOS887G – SEPTEMBER 2014 – REVISED MAY 2025

www.ti.com

Submit Document Feedback

Product Folder Links: TMP112-Q1 TMP112D-Q1

TMP112 Datasheet(PDF) 22 Page - Texas Instruments

TMP112 Datasheet(HTML) 22 Page - Texas Instruments

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46

Datasheet Download

Link URL