TMP451

SBOS686 – JUNE 2013

www.ti.com

Conversion Rate Register

The conversion rate register (read address 04h, write address 0Ah) controls the rate at which temperature

conversions are performed. This register adjusts the idle time between conversions but not the conversion time

itself, thereby allowing the TMP451 power dissipation to be balanced with the temperature register update rate.

Table 6 describes the conversion rate options and corresponding time between conversions. The default value of

the register is 08h, which gives a default rate of 16 conversions per second.

Table 6. Conversion Rate Register

CONVERSION RATE REGISTER (READ = 04h, WRITE = 0Ah, POR = 08h)

VALUE

CONVERSIONS PER SECOND

TIME (SECONDS)

00h

0.0625

16

01h

0.125

8

02h

0.25

4

03h

0.5

2

04h

1

1

05h

2

0.5

06h

4

0.25

07h

8

0.125

08h

16 (default)

0.0625 (default)

09h

32

0.03125

One-Shot Start Register

When the TMP451 is in shutdown mode (SD = '1' in the configuration register), a single conversion is started by

writing any value to the one-shot start register, pointer address 0Fh. This write operation starts one conversion

and comparison cycle on both the local and the remote sensors. The TMP41 returns to shutdown mode when

the cycle completes. The value of the data sent in the write command is irrelevant and is not stored by the

TMP451.

14

Submit Documentation Feedback

Copyright © 2013, Texas Instruments Incorporated

Product Folder Links: TMP451