TMP512 datasheet(13/62 Pages) TI2

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Configuration 1

Configuration 2

Configuration 3

GND

ADC

Subregulator

3.3V

Subregulator

3.3V

V+ = 4.5V to 26V

Filter C

Load

470nF

Bus Voltage Range = 4.5V to 26V

Shunt

SHUNT

IN+

IN-

GND

ADC

V+ = 4.5V to 26V

Load

Filter C

470nF

Bus Voltage Range = 0V to 26V

Shunt

SHUNT

IN+

IN-

GND

ADC

Subregulator

3.3V

V+ = 3V to 5.5V

Load

Filter C

100nF

Bus Voltage Range = 0V to 26V

Shunt

SHUNT

IN+

IN-

TMP512

TMP513

www.ti.com

SBOS491A

– JUNE 2010 – REVISED MAY 2011

APPLICATION INFORMATION

between the two systems is being addressed. Two

bi-directional lines, SCL and SDA, connect the

DESCRIPTION

TMP512/13 to the bus. SDA is an open-drain

The TMP512/13 are digital temperature sensors with

connection. See Figure 23 for a typical application

a digital current-shunt monitor that combine a local

circuit.

die temperature measurement channel and remote

junction temperature measurement channels: two for

SUBREGULATOR

the

TMP512

and

three

for

the

TMP513.

The

TMP512/13 contain multiple registers for holding

The subregulator can be configured to three different

configuration information, temperature, and voltage

modes of operation. Each mode has its advantage

measurement results. These devices provide digital

and

limitation.

Figure

shows

the

three

current, voltage, and power readings necessary for

configuration

arrangements.

The

minimum

accurate

decision-making

precisely-controlled

capacitance on the Filter C pin for Configurations 1

systems.

Programmable

registers

allow

flexible

and 2 is 470nF. The minimum capacitance on the

configuration for setting warning limits, measurement

Filter C pin for Configuration 3 is 100nF.

resolution,

and

continuous-versus-triggered

Configuration 1 has V+ and VIN+ tied together. V+

operation. Detailed register information appears at

supplies the subregulator, which in turn supplies the

the end of this data sheet, beginning with Table 3.

3.3V to the Filter C pin and the internal die. With the

For proper remote temperature sensing operation, the

V+ supply range of 4.5V to 26V connected to the

TMP512 requires transistors connected between

shunt voltage, the bus voltage range cannot go to

DXP1 and DXN1 and between DXP2 and DXN2, and

zero and is limited to 4.5V to 26V.

for the TMP513, between DXP3 and DXN3 as well.

Configuration 2 has V+ to the subregulator without

Unused

channels

the

TMP512/13

must

any other connections. Under this configuration, the

connected to GND.

bus voltage range can go from 0V to 26V, because it

The TMP512/13 offer compatibility with two-wire and

is not limited to 4.5V as in Configuration 1.

SMBus

interfaces.

The

two-wire

and

SMBus

Configuration 3 has the subregulator V+ and Filter C

protocols are essentially compatible with each other.

pins shorted together. V+ is limited to 3V to 5.5V

Two-wire is used throughout this data sheet, with

because the Filter C pin supplies the internal die; it

SMBus being specified only when a difference

cannot exceed this voltage range. The bus voltage

range can go from 0V to 26V, because it is not limited

to 4.5V as in Configuration 1.

Figure 22. Typical Subregulator Configurations

TMP512 数据表(PDF) 13 Page - Texas Instruments

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