FEATURES

Output

INDICATOR PIN

CHANNELS

IA

Current Copy

OPA

Load

DRV

IA

OUT

SET

I

MON

V

−

DGND

V+

XTR300

Digital

Control

OD

M2

M1

Error

Flags

EF

CM

EF

LD

EF

OT

(Optional)

Input Signal

1k

Ω

GND1

GND3

1k

Ω

GND2

Figure 1. XTR300 Basic Diagram

APPLICATIONS

OUTPUT

Patents Pending

DESCRIPTION

The XTR300 is a complete output driver for industrial and

process control applications. The output can be configured

as current or voltage by the digital I/V select pin. No

external

shunt resistor is required. Only external

gain-setting resistors and a loop compensation capacitor

are required.

The separate driver and receiver channels provide

flexibility. The Instrumentation Amplifier (IA) can be used

for remote voltage sense or as a high-voltage, high-

impedance measurement channel. In voltage output

mode, a copy of the output current is provided, allowing

calculation of load resistance.

The digital output selection capability, together with the

error flags and monitor pins, make remote configuration

and troubleshooting possible. Fault conditions on the

output and on the IA input as well as over-temperature

conditions are indicated by the error flags. The monitoring

pins provide continuous feedback about load power or

impedance. For additional protection, the maximum output

current is limited and thermal protection is provided.

Digital communication like HART

 can be modulated onto

the input signal. The receive signal applied to the output

can be detected at the monitor pins in both current and

voltage

output

modes.

In

addition

to

HART

communication, the device offers system or sensor

configuration through the signal connector.

The XTR300 is specified over the −40

°C to +85°C

industrial temperature range and for supply voltage up to

40V.

XTR300

SBOS336B − JUNE 2005 − REVISED MARCH 2006

Industrial Analog Current/Voltage

OUTPUT DRIVER

PRODUCTION DATA information is current as of publication date. Products

conform to specifications per the terms of Texas Instruments standard warranty.

Production processing does not necessarily include testing of all parameters.

www.ti.com

Copyright

 2005−2006, Texas Instruments Incorporated

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments

semiconductor products and disclaimers thereto appears at the end of this data sheet.

HART is a registered trademark of the HART Communication Foundation.

All other trademarks are the property of their respective owners.