Datasheet

TMP431
TMP432
www.ti.com SBOS441F –SEPTEMBER 2009–REVISED AUGUST 2013
Conversion Rate Register
TMP431/32 return to shutdown mode when that
conversion completes. The value of the data sent in
The Conversion Rate Register (pointer address 0Ah)
the write command is irrelevant and is not stored by
controls the rate at which temperature conversions
the TMP431/32. When the TMP431/32 are in
are performed. This register adjusts the idle time
shutdown mode, an initial 200ps is required before a
between conversions but not the conversion timing
one-shot command can be given. (Note: When a
itself, thereby allowing the TMP431/32 power
shutdown command is issued, the TMP431/32 shut
dissipation to be balanced with the temperature
down immediately, aborting the current conversion.)
register update rate. Table 9 shows the conversion
This wait time only applies to the 200ps immediately
rate options and corresponding current consumption.
following shutdown. One-shot commands can be
issued without delay thereafter.
One-Shot Conversions
When the TMP431/32 are in shutdown mode (SD = 1
in the Configuration Register 1), a single conversion
on both channels is started by writing any value to
the One-Shot Start Register, pointer address 0Fh.
This write operation starts one conversion; the
Table 9. Conversion Rate Register
CONVERSION RATE REGISTER (Read = 04h, Write = 0Ah, POR = 07h)
AVERAGE I
Q
(TYP)
(μA)
R7 R6 R5 R4 R3 R2 R1 R0 CONVERSION/SEC V
S
= 2.7V V
S
= 5.5V
0 0 0 0 0 0 0 0 0.0625 11 32
0 0 0 0 0 0 0 1 0.125 17 38
0 0 0 0 0 0 1 0 0.25 28 49
0 0 0 0 0 0 1 1 0.5 47 69
0 0 0 0 0 1 0 0 1 80 103
0 0 0 0 0 1 0 1 2 128 155
0 0 0 0 0 1 1 0 4 190 220
07h to 0Fh 8 373 413
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