TMP116 datasheet(13/46 Pages) TI1

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Shutdown

15.5 ms

(One-Shot Conversion)

(Active Current Consumption Active Conversion Time) + (Standby Current Consumption Standby Time)

Conversion Cycle Time

TMP116, TMP116N

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SBOS740 – MAY 2017

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Device Functional Modes (continued)

Use Equation 1 to calculate the average current consumption of the device in continuous mode.

(1)

7.4.1.3 Continuous Conversion Mode (CC)

When the MOD[1:0] bits are set to 00, the TMP116 operates in continuous conversion mode. In this mode, the

device continuously performs temperature conversions as illustrated in Figure 19 and updates the temperature

result register at the end of every conversion. As described in the Conversion Cycle section, every conversion

cycle consists of an active conversion period followed by a standby period whose duration can be configured

using the CONV and AVG bits in the configuration register based on the temperature accuracy, power

consumption, and temperature update rate tradeoffs of the application that the device is used in. At the end of a

conversion, the Data_Ready flag in the configuration register is set. The Data_Ready flag is cleared by reading

the configuration register or the temperature result register. Therefore, the Data_Ready flag can be used to

determine when the conversion completes so that an external controller can synchronize reading the result

pin by setting the DR/nAlert_EN bit in the configuration register.

7.4.1.4 Shutdown Mode (SD)

When 01 is written to the MOD[1:0] bits in the configuration register, the device instantly aborts the currently

running conversion and enters a low-power shutdown mode. In this mode, the device powers down all active

circuitry and can be used in conjunction with the OS mode to perform temperature conversions. In SD mode, the

device typically consumes only 250 nA, which makes the TMP116 suitable for low-power consumption

applications, such as battery-operated systems.

7.4.1.5 One-Shot Mode (OS)

When in shutdown mode, a single conversion can be performed by writing 10 to MOD[1:0] bits in the

configuration register, referred to as a one-shot conversion. After completing a one-shot conversion, the device

returns to the low-power shutdown mode. A one-shot conversion cycle only consists of active conversion time

and no standby period unlike CC mode. Thus, the duration of a one-shot conversion is only affected by the

settings in the AVG bits. The CONV bits do not affect the duration of a one-shot conversion. Figure 21 shows a

timing diagram for this mode with an AVG setting of 00. At the end of a one-shot conversion, the Data_Ready

flag in the configuration register is set. Therefore, the Data_Ready flag can be used to determine when the

conversion completes. The Data_Ready flag is cleared by performing an I2C read on the configuration register or

temperature result register. The state of the Data_Ready flag can also be monitored on the ALERT pin by setting

the DR/nAlert_EN bit in the configuration register.

Figure 21. One-Shot Timing Diagram

7.4.2 Therm and Alert Functions

The TMP116 can be used to detect if the temperature has crossed a certain temperature limit or if the device is

within a certain temperature range by using the therm or alert functions built into the device. At the end of every

conversion, the TMP116 compares the converted temperature result to the values stored in the low limit register

and high limit register and sets or clears the corresponding status flags in the configuration register, as described

in this section.

TMP116 Datasheet(PDF) 13 Page - Texas Instruments

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