TMP175-Q1, TMP75-Q1

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SBOS759 – NOVEMBER 2015

7.5.3.3 Converter Resolution (R1/R0)

The Converter Resolution bits control the resolution of the internal analog-to-digital (ADC) converter. This control

allows the user to maximize efficiency by programming for higher resolution or faster conversion time. Table 10

identifies the resolution bits and the relationship between resolution and conversion time.

Table 10. Resolution of the TMP175-Q1 and TMP75-Q1

CONVERSION TIME

R1

R0

RESOLUTION

(Typical)

0

0

9 bits (0.5°C)

27.5 ms

0

1

10 bits (0.25°C)

55 ms

1

0

11 bits (0.125°C)

110 ms

1

1

12 bits (0.0625°C)

220 ms

7.5.4 High- and Low-Limit Registers

In comparator mode (TM = 0), the ALERT pin of the TMP175-Q1 and TMP75-Q1 becomes active when the

temperature equals or exceeds the value in THIGH and generates a consecutive number of faults according to

fault bits F1 and F0. The ALERT pin remains active until the temperature falls below the indicated TLOW value for

the same number of faults.

In interrupt mode (TM = 1), the ALERT pin becomes active when the temperature equals or exceeds THIGH for a

consecutive number of fault conditions. The ALERT pin remains active until a read operation of any register

occurs, or the device successfully responds to the SMBus alert response address. The ALERT pin is also

cleared if the device is placed in shutdown mode. When cleared, the ALERT pin only becomes active again by

the temperature falling below TLOW. When the temperature falls below TLOW, the ALERT pin becomes active and

remains active until cleared by a read operation of any register or a successful response to the SMBus alert

response address. When the ALERT pin is cleared, the above cycle repeats, with the ALERT pin becoming

active when the temperature equals or exceeds THIGH. The ALERT pin can also be cleared by resetting the

device with the General-Call Reset command. This action also clears the state of the internal registers in the

device, returning the device to comparator mode (TM = 0).

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Product Folder Links: TMP175-Q1 TMP75-Q1