TMP103CYFFR datasheet(6/23 Pages) TI

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I/O

Control

Interface

SCL

SDA

Temperature

Configuration

LOW

HIGH

Pointer

TMP103

0.01mF

V+

GND

SCL

SDA

Two-Wire

Controller

TMP103

SBOS545A

– FEBRUARY 2011 – REVISED MARCH 2011

www.ti.com

APPLICATION INFORMATION

GENERAL DESCRIPTION

To maintain accuracy in applications that require air

or surface temperature measurement, care should be

The TMP103 is a digital output temperature sensor in

taken to isolate the package from ambient air

a wafer chip-scale package (WCSP) that is optimal

temperature.

for thermal management and thermal profiling. The

TMP103

includes

two-wire

interface

that

POINTER REGISTER

compatible with both I2C and SMBus interfaces. In

addition, the TMP103 has the capability of executing

Figure 7 shows the internal register structure of the

multiple device access (MDA) commands that allow

TMP103. The 8-bit Pointer Register of the device is

multiple TMP103s to respond to a single global bus

used to address a given data register. The Pointer

command. MDA commands reduce communication

time and power in a bus that contains multiple

data registers should respond to a read or write

TMP103 devices. The TMP103 is specified over a

command. Table 1 identifies the bits of the Pointer

temperature range of

–40ºC to +125 ºC.

P7 must always be '0'. Table 2 describes the pointer

The TMP103 serial interface is designed to support

address of the registers available in the TMP103.

up to eight TMP103 devices on a single bus. The

Power-up reset value of P1/P0 is '00'. By default, the

TMP103 is offered with eight internal interface

TMP103 reads the temperature on power-up.

addresses. Each unique address option can be used

as a location or temperature zone designator. The

TMP103 responds to standard I2C/SMBus slave

protocols that allow the internal registers to be written

to or read from on an individual basis. The TMP103

also responds to MDA commands that allow all the

devices on the bus to be written to or read from,

without having to send the individual address and

commands to each device.

Pull-up resistors are required on SCL and SDA. A

0.01

μF bypass capacitor is also recommended, as

shown in Figure 6.

Figure 7. Internal Register Structure

Table 1. Pointer Register Byte

Table 2. Pointer Addresses

NOTE: SCL and SDA pins require pull-up resistors.

Figure 6. Typical Connections

Temperature Register (Read Only)

Configuration Register (Read/Write)

The temperature sensor in the TMP103 is the chip

itself. Thermal paths run through the package bumps

TLOW Register (Read/Write)

as well as the package. The lower thermal resistance

THIGH Register (Read/Write)

of metal causes the bumps to provide the primary

thermal path.

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