TMP435ADGST datasheet(16/35 Pages) TI1

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TMP435

SBOS495A – MARCH 2010 – REVISED APRIL 2010

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Table 5. Configuration Register 1 Bit Descriptions

CONFIGURATION REGISTER 1

(Read = 03h, Write = 09h, POR = 00h)

BIT

NAME

FUNCTION

POWER-ON RESET VALUE

0 = ALERT Enabled

MASK

1 = ALERT Masked

0 = Run

1 = Shut Down

0 = ALERT Mode

AL/TH

1 = THERM Mode

4, 3

Reserved

—

0 = 0°C to +127°C

Temperature Range

1 =

−55°C to +150°C

1, 0

Reserved

—

The

LEN

bit

enables

the

local

temperature

Configuration Register 2

measurement channel. If LEN = '1', the local channel

is enabled; if LEN = '0', the local channel is disabled.

Configuration

(pointer

address

1Ah)

controls which temperature measurement channels

The

REN

bit

enables

external

temperature

are enabled and whether the external channels have

measurement channel 1 (connected to pins 1 and 2.)

the resistance correction feature enabled or not.

If REN = '1', the external channel is enabled; if REN =

'0', the external channel is disabled.

The RC bit enables the resistance correction feature

for the external temperature channels. If RC = '1',

The temperature measurement sequence is local

series resistance correction is enabled; if RC = '0',

channel, external channel 1, shutdown, and delay (to

resistance

correction

disabled.

Resistance

set conversion rate, if necessary). The sequence

correction should be enabled for most applications.

starts over with the local channel. If any of the

However, disabling the resistance correction may

channels are disabled, they are skipped in the

yield slightly improved temperature measurement

sequence.

Table

summarizes

the

bits

noise performance, and reduce conversion time by

Configuration Register 2.

about 50%, which could lower power consumption

when conversion rates of two per second or less are

selected.

space

Table 6. Configuration Register 2 Bit Descriptions

CONFIGURATION REGISTER 2

(Read/Write = 1A, POR = 1Ch)

BIT

NAME

FUNCTION

POWER-ON RESET VALUE

7, 6, 5

Reserved

—

0 = External channel 1 disabled

REN

1 = External channel 1 enabled

0 = Local channel disabled

LEN

1 = Local channel enabled

0 = Resistance correction

disabled

1 = Resistance correction

enabled

1, 0

Reserved

—

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