TMP114 datasheet(18/41 Pages) TI

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7.4 Device Functional Modes

The TMP118 can be configured to operate in continuous or shutdown mode. This flexibility enables designers to

balance the requirements of power efficiency and performance.

7.4.1 Continuous Conversion Mode

When the Shutdown bit is set to 0b in the configuration register, the device operates in continuous conversion

mode. Figure 7-7 shows the device in a continuous conversion cycle. In this mode, the device performs

conversion at fixed intervals and updates the temperature result register at the end of every conversion, The

typical active conversion time is 11ms (with no averaging).

Start of

conversion

Ac ve conversion me

(tACT)

Standby Time

(tSTANDBY)

Conversion Period

(tConv_Period)

Figure 7-7. Continuous Conversion Cycle Timing Diagram

The Conversion_Rate[1:0] bits in the configuration register controls the rate at which the conversions are

performed. The device typically consumes 55µA during conversion and 750nA during the low power standby

period. By decreasing the rate at which conversions are performed, the application can benefit from reduced

average current consumption in continuous mode.

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

Average Current = ((IDD_ACTIVE × tACT) + (IDD_SB × tSTANDBY)) / tConv_Period

(1)

Where

• tACT = Active conversion time

• tConv_Period = Conversion Period

• tSTANDBY = Standby time between conversions calculated as tConv_Period - tACT

TMP118

SNIS237 – DECEMBER 2024

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TMP114 Datasheet(PDF) 18 Page - Texas Instruments