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Analog Devices Inc. LT3092IDD#TRPBF
- Part No.:
- LT3092IDD#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Current Regulation/Management
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
LT3092IDD#TRPBF.pdf
- Description:
- IC CURRENT SOURCE 1% 8DFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,859
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Product details
Overview
LT3092IDD#TRPBF from Analog Devices is a 2-terminal programmable current source IC designed for precision biasing, sensor excitation, and intrinsic safety circuits. It delivers 0.5mA–200mA output current with 1% initial SET pin accuracy, <0.001%/V line regulation, and operates across 1.2V–40V input voltage range without requiring input or output capacitors.
For engineers reviewing the LT3092IDD#TRPBF datasheet, LT3092IDD#TRPBF pinout, LT3092IDD#TRPBF application, or LT3092IDD#TRPBF equivalent, key selection criteria include its resistor-programmable current setting, reverse-voltage/reverse-current protection, Kelvin-sensed current regulation (<10ppm/V), thermal shutdown, and suitability for floating or ground-referenced current sourcing in hazardous-area instrumentation.
Technical Context
The LT3092IDD#TRPBF implements a precision 10µA reference current source feeding the noninverting input of a high-gain power op-amp, enabling accurate current mirroring via external RSET/ROUT ratio. Its architecture achieves >100dB AC impedance and stable operation without bypass capacitors due to internal compensation and low-output-impedance buffering.
It supports true 2-terminal operation (IN/OUT only) with SET pin as high-impedance control node, features integrated reverse-battery and reverse-current protection, and maintains regulation down to 1.22V dropout at 10mA load. Thermal shutdown activates at 125°C junction temperature with hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current Range | 0.5mA to 200mA - set by external RSET/ROUT ratio; minimum 0.5mA required for regulation |
| Input Voltage Range | 1.2V to 40V - enables wide-supply compatibility including industrial 24V and automotive 12V systems |
| SET Pin Current Accuracy | ±1% initial tolerance - ensures precise current programming without calibration |
| Line Regulation | <0.001%/V typical - minimizes output current drift over input voltage variation |
| Dropout Voltage | 1.22V at 10mA, 1.45V at 200mA - defines minimum headroom needed between IN and OUT |
| Current Regulation | Better than 10ppm/V from 1.5V to 40V - guarantees stable current under varying supply conditions |
| Protection Features | Reverse-voltage, reverse-current, current limiting, thermal shutdown - eliminates need for external protection circuitry |
Pinout & Package
LT3092IDD#TRPBF is housed in an 8-lead 3mm × 3mm plastic DFN package (DD) with exposed pad tied internally to OUT. The exposed pad must be soldered to the PCB's OUT net for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN (Pins 7, 8) | Power Input | Supplies bias and load current; must be 1.2–1.45V above OUT depending on load |
| OUT (Pins 1, 2) | Current Output | Delivers regulated current; connects to exposed pad; serves as reference return for SET pin |
| SET (Pin 4) | Reference Control | Sinks precise 10µA current; voltage at this pin sets output current via RSET/ROUT ratio |
| NC (Pins 3, 5, 6) | No Connection | Internally unconnected; may be left floating or tied to OUT/GND without effect |
| Exposed Pad (Pin 9) | Output Terminal | Electrically and thermally connected to OUT pins; mandatory PCB connection for thermal performance |
Key Features
| Feature | Design Value |
|---|---|
| 2-Terminal Floating Operation | Enables series insertion into signal lines without ground reference-critical for intrinsic safety loop-powered sensors |
| Capacitor-Free Stability | Eliminates need for input/output bypass caps-reduces BOM count, avoids ESR-related instability, and simplifies layout |
| Resistor-Ratio Programming | Output current determined solely by RSET/ROUT ratio-enables temperature-tracking with matched resistors |
| Kelvin-Sensed Current Regulation | Measurement at package terminals ensures accuracy despite PCB trace resistance or contact losses |
| Reverse-Voltage Protection | Withstands –40V on IN relative to OUT-prevents damage during battery reversal or wiring faults |
| AEC-Q100 Qualified | Rated for automotive applications (–40°C to 125°C)-validates reliability for harsh-environment use |
Applications
| Loop-Powered 4–20mA Transmitters | Industrial Sensor Excitation |
|---|---|
Use Scenario: Powering and biasing RTD, strain gauge, or pressure sensor bridges in explosion-proof field instruments. IC Role / Device Role / Timing Role: 2-terminal floating current source providing stable excitation current independent of loop voltage variations. Use Value: Enables intrinsically safe design by eliminating energy-storing capacitors and maintaining compliance with IEC 60079-11. |
Use Scenario: Supplying precise, low-noise bias current to MEMS accelerometers or Hall-effect sensors in factory automation PLCs. IC Role / Device Role / Timing Role: GND-referenced programmable current source delivering calibrated excitation for ratiometric measurements. Use Value: Achieves <0.001%/V line regulation and <10ppm/V current regulation-minimizing measurement error across 24V supply rails. |
| Precision Current Limiting | Remote LED Driver |
Use Scenario: Protecting local 3.3V/5V supplies from overload in medical diagnostic equipment with multiple analog front-ends. IC Role / Device Role / Timing Role: In-line current limiter placed between regulator output and downstream loads. Use Value: Provides fast-acting, self-resetting current limit (200mA typ.) with thermal shutdown-no external sense resistor or FET required. |
Use Scenario: Driving remote indicator LEDs over long cables in building management systems. IC Role / Device Role / Timing Role: Floating 2-terminal current source inserted directly into LED cathode path. Use Value: Maintains constant LED brightness regardless of cable voltage drop-eliminates need for local regulation at endpoint. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar programmable current source applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT3092ETS8#TRPBF | Same core functionality but in 8-lead TSOT-23 package; higher θJA (57°C/W) vs. DFN (28°C/W); no exposed pad | Better suited for space-constrained PCBs where thermal load is light (<50mA continuous) | Select when board area is critical and thermal dissipation requirements are modest |
| LM334Z/NOPB | 3-terminal device requiring external bias; 1µA–10mA range; no reverse-protection; ±3% initial accuracy | Limited to low-current biasing; unsuitable for intrinsic safety or high-side sensing | Choose only for cost-sensitive, low-precision, low-power analog biasing where protection and accuracy are secondary |
Compared with LT3092ETS8#TRPBF, the LT3092IDD#TRPBF offers superior thermal performance and robustness for 200mA operation; compared with LM334Z/NOPB, it provides wider current range, integrated protection, and 10× better accuracy-making it the only viable option for certified industrial and automotive current-source designs.
Availability
LT3092IDD#TRPBF is available at Aetrix Electronics and suitable for loop-powered transmitters, industrial sensor excitation, precision current limiting, and remote LED driving requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LT3092IDD#TRPBF includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Analog Devices, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.
The LT3092IDD#TRPBF belongs to Analog Devices' Linear Technology precision current source product line, engineered specifically for applications demanding capacitor-free stability, intrinsic safety compliance, and programmable 2-terminal operation in harsh environments.
FAQ
What is the minimum load current required for LT3092IDD#TRPBF to maintain regulation?
The LT3092IDD#TRPBF requires a minimum load current of 0.5mA to remain in regulation. Below this threshold, the internal error amplifier cannot sustain closed-loop control, and output current becomes unregulated. This value is specified in the Electrical Characteristics table and confirmed across the full –40°C to 125°C operating temperature range for the IDD grade.
Can LT3092IDD#TRPBF operate without input or output capacitors?
Yes, the LT3092IDD#TRPBF is explicitly designed for stable operation without input or output capacitors. Its internal compensation and high DC/AC output impedance eliminate the need for external bypass components-enabling use in intrinsically safe circuits where energy storage is prohibited. Stability is maintained across all specified load and input voltage conditions per the datasheet.
How is output current programmed on the LT3092IDD#TRPBF?
Output current on the LT3092IDD#TRPBF is programmed using two external resistors: RSET connected between SET and OUT, and ROUT connected between OUT and load. With a precise 10µA current sourced from the SET pin, IOUT = (10µA × RSET) / ROUT + 10µA. The ratio of RSET to ROUT determines the final current, enabling accurate, temperature-tracked settings.
Does LT3092IDD#TRPBF provide reverse-voltage protection?
Yes, the LT3092IDD#TRPBF includes integrated reverse-voltage protection, allowing it to withstand up to –40V on the IN pin relative to OUT without damage or reverse current flow. This feature protects against battery misconnection or field-wiring errors in industrial and automotive applications-eliminating the need for external diodes or protection ICs.
What thermal considerations apply to LT3092IDD#TRPBF in the DFN package?
The LT3092IDD#TRPBF in the 3mm × 3mm DFN package has θJA = 28°C/W and θJC = 10°C/W. To maintain safe operation at 200mA, the exposed pad must be soldered to a large copper pour connected to the OUT net. Without adequate PCB copper area, junction temperature can exceed 125°C, triggering thermal shutdown. Layout guidelines specify minimum pad size and via count in the Applications Information section.
LT3092IDD#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-WFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Current Source
- Sensing Method:
- -
- Accuracy:
- ±1%
- Voltage - Input:
- 1.2V ~ 40V
- Current - Output:
- 200mA
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-DFN (3x3)
LT3092IDD#TRPBF FAQ
1.How can I place an order for LT3092IDD#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT3092IDD#TRPBF on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for LT3092IDD#TRPBF reliable?
The price and inventory of LT3092IDD#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT3092IDD#TRPBF is usually 5 days.
3.What payment methods are accepted for LT3092IDD#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT3092IDD#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT3092IDD#TRPBF?
LT3092IDD#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT3092IDD#TRPBF order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for LT3092IDD#TRPBF?
For technical support, including LT3092IDD#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT3092IDD#TRPBF requirements.
6.How does Aetrix verify that LT3092IDD#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT3092IDD#TRPBF products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that LT3092IDD#TRPBF meets industry standards.
7.What is the process for return or replacement of LT3092IDD#TRPBF?
All LT3092IDD#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT3092IDD#TRPBF, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The LT3092IDD#TRPBF part is unused and in its original packaging.
Return procedure for LT3092IDD#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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