company blog about ADI LT3092IST 200mA 2-Terminal Programmable Current Source

ADI LT3092IST 200mA 2-Terminal Programmable Current Source

Shenzhen Mingjiada Electronics Co., Ltd, as a world-renowned authorised independent distributor of electronic components, specialises in supplying ADI's high performance LT3092IST 200mA 2-terminal programmable current source chip.

ADI LT3092IST Programmable Current Source Product Details
LT3092IST is a high-performance programmable two-terminal current source from ADI in a 3-pin SOT-223 package designed for applications requiring precision current control. As a key member of the Power Management Integrated Circuit (PMIC) family, the device excels in scenarios such as sensor driving, remote powering and local power management.

LT3092IST is a programmable 2-terminal current source. It requires only two resistors to set an output current between 0.5mA and 200mA. A multitude of analog techniques lend themselves to actively programming the output current. LT3092IST is stable without input and output capacitors, offering high DC and AC impedance. This feature allows operation in intrinsically safe applications.

The SET pin features 1% initial accuracy and low temperature coefficient. Current regulation is better than 10ppm/V from 1.5V to 40V.

LT3092IST can operate in a 2-terminal current source configuration in series with signal lines. It is ideal for driving sensors, remote supplies, and as a precision current limiter for local supplies.

Specification Of LT3092IST
Sensing Method:Low Side
Supply Voltage - Max:40 V
Supply Voltage - Min:1.2 V
Operating Supply Current:300 uA
Accuracy:1 %
Minimum Operating Temperature:- 40 C
Maximum Operating Temperature:+ 125 C
Unit Weight:505.850 mg

Key Features and Technical Innovations Of LT3092IST
The LT3092IST integrates a number of advanced technologies that set it apart from its competitors:
Wide-range programmable current output: Only two external resistors are required to set the output current range from 0.5mA to 200mA, making the design flexible and easy to use.
Outstanding current accuracy: The SET pin provides 1% initial accuracy and a low temperature coefficient, which ensures that the current output is stable and reliable. Reliability
Excellent line regulation performance: in the 1.5V to 40V input range, the current regulation is better than 10ppm/V, which significantly reduces the impact of voltage fluctuations on the output
Wide Input Voltage Range: supports 1.2V to 40V input voltage, adaptable to a wide range of power supply environments
Simplified Design: Stable operation without the need for input and output capacitors, reducing the number of external components and PCB area
High Impedance Characteristics: High impedance characteristics: High DC and AC impedance, especially suitable for intrinsically safe applications.

Advanced Protection Functions Of LT3092IST
The LT3092IST has built-in multiple protection mechanisms, which greatly improves the reliability and safety of the system:
Reverse Voltage Protection: Prevents damage to the device due to the reversal of power supply.
Reverse Current Protection: Avoids faults caused by reverse current flow under abnormal working conditions.
Current Limit: Automatically limits the maximum output current to protect the load and the device itself. device itself
Thermal shutdown protection: automatically shuts down the output when the temperature exceeds the safety threshold to prevent overheating damage

Typical application scenarios of the LT3092IST
The ADI LT3092IST programmable current source plays a key role in many industrial, automotive, and consumer electronics fields due to its high accuracy, high reliability, and design flexibility.

Sensor Driving and Signal Conditioning
In industrial sensors and environmental monitoring equipment, LT3092IST performs well as a precision current source:
Temperature Sensors: Provide stable excitation current for RTDs and thermocouples to ensure the accuracy of temperature measurements
Pressure Sensors: Drive MEMS pressure sensors for high-resolution pressure monitoring
Photodetectors: Provide a constant current for the photosensitive element to improve the detection of optical signals Signal-to-noise ratio of optical signal detection
4-20mA transmitter: builds the core current source of two-wire industrial transmitters to achieve the remote transmission of process variables

Power management and distribution system
LT3092IST has unique advantages as a precision current limiter and distributed power supply in power supply systems:
Intrinsically safe circuit: utilizes its high impedance characteristics for intrinsically safe equipment in hazardous environments
LED driver: provides constant current for LED strings to ensure the brightness of the LEDs. LED drivers: Provide constant current to LED strings to ensure consistent brightness and long life
Remote power supply: Power remote devices over long cables, with current source characteristics compensating for line voltage drop
Power redundancy system: Even out current flow in multiple parallel applications to improve system reliability

Test Measurement & Instrumentation
In precision test equipment, the LT3092IST provides a highly stable current reference:
Semiconductor tester: Provides a programmable excitation current calibration source for device testing. Semiconductor Testers: Providing programmable excitation current for device testing
Calibration Sources: Acting as a secondary standard current source for instrument calibration
Data Acquisition Systems: Providing accurate bias currents for analogue front-ends to improve measurement accuracy
Laboratory Power Supplies: Building programmable current source modules for R&D testing needs

Automotive Electronics and Communications Equipment
The LT3092IST's wide temperature range (-40°C to +125°C) and high reliability make it suitable for harsh environments In-vehicle sensors: for TPMS, position sensors, and other automotive electronics systems
Communication base stations: to provide bias current for RF modules to ensure signal quality
Networking equipment: as a current limiter in power management circuits for routers and switches
5G infrastructure: to support the power requirements of 5G small base stations and optical modules