TMP141 datasheet(10/24 Pages) TI

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TMP141

SBAS347A − MARCH 2005 − REVISED JULY 2006

www.ti.com

APPLICATIONS INFORMATION

Table 1. Register Set Summary

ADDRESS

RESET

VALUE

BIT POSITION (MSB to the left. In a transmission, the MSB is sent first.)

ADDRESS

(hex)

NAME

R/W

VALUE

(hex)

Device

Number

1(1)

Not Available (this register is 8 bits long)

Reserved

See Table 2

Device

Number

1(1)

Not Available (this register is 8 bits long)

AS2

AS1

AS0

Manufacturer

104C

Device ID

Revision ID

Device ID

Capabilities

Reserved

Function 1

Capabilities

Status

Not Available (this register is 8 bits long)

BER

ORUN

SF1

Device

Control

R/W

Reserved

ENAB

Res

Low

Pwr

Shut

Down

Reset

Device

Control

R/W

ENAB

Low

Pwr

Shut

Down

Reset

Temperature

Capabilities

014A

Reserved

Internal

Sense

ROUT

Size

Sign

Result is10 Bits

Resolution Is 0.25

°C

Capabilities

014A

Temperature

Readout

Sign

°C 32°C 16°C 8°C

°C

0.5

°C

0.25

°C

Reserved

Temperature

Readout

Sign

°C 32°C 16°C 8°C

°C

0.5

°C

0.25

°C

Temperature

Control

R/W

EN_S

AT_E

Temperature

Control

R/W

EN_S

AT_E

B−1F

Reserved

Undefined

Conversion

Rate

R/W

2(2)

Not Available (this register is 8 bits long)

Conversion

Rate

21−3F

Undefined

(1) See Table 2 for the value of register 0 at Reset.

(2) See Table 4 for the conversion rate settings.

created from the inputs at the address pins. The result is

placed in Register 0 according to Table 2.

Table 2. Device Number—Assignments

ADD1:ADD0

AS2:AS0

BITS 2:0

001

010

011

100

ADD1 and ADD0 are the physical pins used to define the

address to which the TMP141 responds to—they are not

the actual addresses. AS2:AS0 is the address to which the

device responds.

Device number 000b is the broadcast address reserved for

communicating with all devices, and can be responded to

by all slave devices. The TMP141 ignores a broadcast

Read transaction. A broadcast Write message may be

used to write to the Device Control Register, which is the

only register which responds to broadcast messages (see

the Device Control Register description).

The Manufacturer ID for Texas Instruments is 104Ch.

The device ID is unique for each device produced by TI.

Bits 10:0 contain 8Dh, which is the identifier for the

TMP141. Bits 15:11 identify the revision of the die and will

be incremented upon device revision.

Function 1 for the TMP141 is temperature measurement;

this is the only function defined for the TMP141. This

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