Overview
The XTR106U/2K5 is a monolithic 4mA to 20mA, two-wire current transmitter designed by Texas Instruments for cost-optimized bridge sensor applications. This device integrates complete bridge excitation, instrumentation amplifier, sensor linearization, and current output circuitry. It is optimized for use in various industrial and process control environments, offering high accuracy and low drift characteristics.
Key Specifications
| Parameter | Test Conditions | Min | Max | Units | |
|---|---|---|---|---|---|
| Output Current Range | 4 | 20 | mA | ||
| Supply Voltage Range | 7.5 | 36 | V | ||
| Bridge Excitation References | 2.5V, 5V | V | |||
| Regulator Output Voltage | 5.1 | V | |||
| Span Drift | TA = −40°C to +85°C | ±25 | ppm/°C | ||
| Offset Drift | TA = −40°C to +85°C | 0.25 | μV/°C | ||
| Power Supply Rejection Ratio (PSR) | 110 | dB | |||
| Common Mode Rejection Ratio (CMR) | 86 | dB | |||
| Package Options | 14-pin DIP, 14-pin SOIC |
Key Features
- Low total unadjusted error
- 2.5V and 5V bridge excitation references
- 5.1V regulator output
- Low span drift: ±25ppm/°C maximum
- Low offset drift: 0.25μV/°C
- High PSR: 110dB minimum
- High CMR: 86dB minimum
- Wide supply range: 7.5V to 36V
- Second-order linearization correction for bridge nonlinearity
- Available in 14-pin DIP and SOIC packages
Applications
- Field transmitter and sensor
- Factory automation
- Compatible with HART modem
- Pressure and temperature bridge transmitters
- Industrial process control
- SCADA remote data acquisition
- Weighing systems
- Strain gauge transmitters
- Accelerometers
Q & A
- What is the primary function of the XTR106U/2K5?
The XTR106U/2K5 is a 4mA to 20mA, two-wire current transmitter designed for bridge sensor applications, providing bridge excitation, instrumentation amplifier, sensor linearization, and current output circuitry.
- What are the available bridge excitation references for the XTR106U/2K5?
The device offers 2.5V and 5V bridge excitation references.
- What is the range of the supply voltage for the XTR106U/2K5?
The supply voltage range is from 7.5V to 36V.
- What are the key specifications for span and offset drift?
The span drift is ±25ppm/°C maximum, and the offset drift is 0.25μV/°C.
- What are the package options for the XTR106U/2K5?
The device is available in 14-pin DIP and 14-pin SOIC packages.
- What is the purpose of the linearization correction circuitry in the XTR106U/2K5?
The linearization correction circuitry provides second-order correction to the transfer function, achieving up to a 20:1 improvement in nonlinearity.
- What are some common applications for the XTR106U/2K5?
Common applications include field transmitter and sensor, factory automation, pressure and temperature bridge transmitters, industrial process control, SCADA remote data acquisition, weighing systems, strain gauge transmitters, and accelerometers.
- How does the XTR106U/2K5 handle reverse-voltage protection?
The device allows for reverse-voltage protection using a diode bridge circuit or a single diode in series with the loop supply voltage to protect against reverse output connection lines.
- What is the temperature range for the XTR106U/2K5?
The device operates from –40°C to +125°C and is specified for the –40°C to +85°C temperature range.
- How does the XTR106U/2K5 achieve high accuracy in measurements?
The device achieves high accuracy through its low total unadjusted error, low span and offset drift, and high PSR and CMR.
