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XTR305IRGWT

4-20mA loop transmitter, 16-bit DAC, 12-60V, SPI, current/voltage out, TSSOP-20

2850

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Pieza del fabricante：

XTR305IRGWT

Paquete：

TSSOP-20 (6.50 x 4.40 x 1.00 mm)

Marca：

Categorías de productos：

Circuitos integrados de interfaz

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Descripción

Productos

The XTR305IRGWT from Texas Instruments is a 4-20mA current loop transmitter with voltage output capability for industrial process control. It includes a precision DAC, loop driver, and fault protection in a TSSOP-20 package operating from 12V to 60V loop supply.

Especificaciones

Función	4-20mA current loop transmitter
Output Mode	Current (4-20mA) or Voltage
Loop Supply	12 V to 60 V
Output Current Range	0 mA to 24 mA
Output Voltage Range	0 V to 12 V
DAC Resolution	16-bit
Accuracy	+/-0.1% FSR typical
Interface	SPI (50MHz)
Fault Protection	Overcurrent, open-loop, overtemperature
Temperatura de funcionamiento	-40°C to +125°C
Paquete	TSSOP-20

Características

4-20mA current loop and voltage output transmitter with integrated 16-bit DAC
12-60V wide loop supply range for industrial process control

Aplicaciones

4-20mA process control transmitter for industrial automation

Introducción del producto:XTR305IRGWT Presentación del producto

The XTR305IRGWT from Texas Instruments is a complete 4-20mA current loop transmitter with an integrated 16-bit DAC, voltage output option, and comprehensive fault protection. The device operates from a 12V to 60V loop supply and can output current from 0 to 24mA or voltage from 0 to 12V. The 16-bit DAC provides +/-0.1% FSR accuracy for precise current or voltage control. An SPI interface running at up to 50MHz allows fast updates from the host microcontroller. Built-in fault detection includes open-loop, overcurrent, overtemperature, and power-supply monitoring with a dedicated fault output pin. The device is designed for industrial process control applications where reliable 4-20mA current loop communication is required. The TSSOP-20 package provides a compact footprint for space-constrained transmitter modules.

Principio de funcionamiento:XTR305IRGWT Principio de funcionamiento

The XTR305IRGWT operates as a digitally controlled 4-20mA current loop transmitter. (1) DAC: The 16-bit R-2R DAC converts the digital SPI input code to an analog voltage that drives the output stage. The DAC output is buffered and scaled to the desired output range. (2) Current Output: In current mode, the output stage drives the loop current by regulating the voltage across an internal sense resistor. The loop current is proportional to the DAC code, with 4mA at zero-scale and 20mA at full-scale (or custom ranges). (3) Voltage Output: In voltage mode, the output stage drives a voltage output from 0 to 12V, suitable for voltage-mode process control systems. (4) Fault Detection: The device continuously monitors for fault conditions including open loop (broken wire), overcurrent (short circuit), overtemperature, and undervoltage. The FAULT output pin is driven low when any fault is detected, and the fault type can be read via SPI. (5) Loop Power: The device is powered entirely from the loop supply voltage (12-60V), requiring no separate logic supply. An internal LDO generates the low-voltage supplies needed by the DAC and logic.

Descripción de la clavija:XTR305IRGWT Definición y funciones de las clavijas

Pin	Nombre	Función
1-2	VLOOP/LO	Loop supply and loop return
3-4	IOUT/COMM	Current output and common
5-6	VOUT/SENSE	Voltage output and sense
7-10	SPI	SCLK, SDI, SDO, CS
11	FALLO	Fault output (active low)