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Analog Devices Inc. LT3092IDD#PBF
- Part No.:
- LT3092IDD#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Current Regulation/Management
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
LT3092IDD#PBF.pdf
- Description:
- IC CURRENT SOURCE 1% 8DFN
- Quantity:
- Payment:
- Shipping:
Inventory:360
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Product details
Overview
LT3092IDD#PBF from Analog Devices is a 2-terminal programmable current source IC with 10µA SET pin reference current, ±2mV offset voltage, <0.001%/V line regulation, 1.2V–40V input range, and 200mA maximum output-used in intrinsic safety circuits, remote sensor biasing, and precision current limiting.
For engineers reviewing the LT3092IDD#PBF datasheet, LT3092IDD#PBF pinout, LT3092IDD#PBF application, or LT3092IDD#PBF equivalent, this page delivers verified electrical parameters, DFN-8 package terminal mapping, real-world use scenarios, and two validated alternative parts for industrial and automotive current-source designs.
Technical Context
The LT3092IDD#PBF implements a precision Kelvin-sensed current regulation architecture using a 10µA zero-TC reference current source feeding the noninverting input of a high-gain power op-amp. Output current is set by resistor ratio (IOUT = 10µA × RSET/ROUT + 10µA), enabling stable 0.5mA–200mA operation without input/output capacitors.
It features reverse-battery and reverse-current protection, thermal shutdown with hysteresis, and operates across –40°C to +125°C. The device maintains better than 10ppm/V current regulation from 1.5V to 40V input-to-output differential and supports floating, ground-referred, or in-line configurations.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current Range | 0.5mA to 200mA - programmable via external resistor ratio; minimum 0.5mA required for regulation. |
| SET Pin Reference Current | 10µA ±1% - stable zero-TC current source used to generate VSET; enables accurate IOUT scaling. |
| Offset Voltage (VOUT – VSET) | ±2mV max - determines absolute current accuracy at low output levels and impacts error in RSET/ROUT ratio. |
| Line Regulation | <0.001%/V typical - ensures stable output current despite input voltage variation from 1.2V to 40V. |
| Dropout Voltage | 1.22V @ 10mA, 1.45V @ 200mA - minimum VIN–VOUT headroom needed to sustain regulation; defines usable supply margin. |
| Input Voltage Range | 1.2V to 40V - supports wide-supply applications including battery-powered and industrial rails. |
| Thermal Shutdown Threshold | Junction temperature >125°C - protects against sustained overload; hysteresis prevents oscillation near trip point. |
Pinout & Package
LT3092IDD#PBF uses an 8-lead 3mm × 3mm plastic DFN package (DD) with exposed pad tied internally to OUT. Pin 9 (exposed pad) must be soldered to PCB copper connected to OUT for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN (Pins 7, 8) | Power Input | Bias and load current supply path; requires 1.2V–40V above OUT to maintain regulation. |
| OUT (Pins 1, 2) | Current Output Terminal | High-impedance current sink/source node; connects to exposed pad (Pin 9); sets output compliance limit. |
| SET (Pin 4) | Reference Input | Noninverting input of internal op-amp; sinks precise 10µA; voltage here programs output current via RSET. |
| NC (Pins 3, 5, 6) | No Connection | Internally unconnected; may be left floating or tied to OUT/IN/GND without functional impact. |
Key Features
| Feature | Design Value |
|---|---|
| Capacitor-free stability | Operates reliably without input or output bypass capacitors-critical for intrinsic safety and surge-sensitive systems. |
| Reverse-voltage protection | Withstands ±40V on IN relative to OUT-prevents damage during battery misconnection or polarity reversal. |
| 2-terminal floating configuration | Enables series insertion into signal lines (e.g., 4–20mA loops) without ground reference, simplifying isolation design. |
| Low temperature drift | SET pin current drift <10ppm/°C - ensures stable output current over –40°C to +125°C operating range. |
| Programmable current limiter | Replaces discrete current-limit circuits with single IC; eliminates need for sense resistors, op-amps, and MOSFETs. |
Applications
| 4–20mA Loop Transmitter | Intrinsic Safety Barrier |
|---|---|
Use Scenario: Driving a 4–20mA current loop in hazardous-area instrumentation where energy storage must be minimized. IC Role / Device Role / Timing Role: 2-terminal floating current source placed in series with loop; regulates loop current independent of load impedance and supply variation. Use Value: Eliminates need for isolated DC-DC converters or Zener-based barriers; meets IEC 60079-11 spark-energy limits due to no required bulk capacitance. |
Use Scenario: Providing certified safe power to field sensors in Zone 0/1 explosive atmospheres. IC Role / Device Role / Timing Role: GND-referred current source supplying bias to explosion-proof pressure/temperature transducers. Use Value: Complies with intrinsic safety requirements by limiting fault energy-no capacitor discharge hazard due to capacitor-free operation. |
| Remote Sensor Biasing | Precision Local Current Limiter |
Use Scenario: Powering RTDs, bridge sensors, or photodiodes located meters from controller PCB via long cables. IC Role / Device Role / Timing Role: In-line current source inserted between supply and sensor; rejects cable voltage drop and noise. Use Value: Maintains constant excitation current despite IR drop up to 40V; immune to EMI-induced errors common in unshielded runs. |
Use Scenario: Protecting FPGA I/O banks or analog front-ends from overcurrent during hot-plug or ESD events. IC Role / Device Role / Timing Role: Adjustable current limiter placed in series with supply rail to sensitive circuitry. Use Value: Limits fault current to exact value (e.g., 100mA) without tripping upstream fuses; faster response than polyfuses. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 2-terminal programmable current source applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT3094EDD#PBF | Higher PSRR (120dB vs 90dB), lower noise (0.8µVRMS), 300mA max output; adds enable pin and improved thermal performance. | Suitable for noise-sensitive precision DAC biasing and medical sensor excitation where ripple rejection exceeds 90dB. | Choose LT3094EDD#PBF when higher output current, lower noise, or enable control is required-same DFN-8 footprint but not pin-compatible. |
| LM334Z/NOPB | 3-terminal device (adj, in, out); 1µA–10mA range; requires external resistor for setpoint; no reverse-protection or thermal shutdown. | Used in low-power lab equipment and temperature-compensated references where cost and simplicity outweigh protection needs. | Choose LM334Z/NOPB only for sub-10mA, non-safety-critical applications; requires redesign for reverse-protection and thermal management. |
Compared with LT3092IDD#PBF, LT3094EDD#PBF offers higher performance at cost premium and layout change, while LM334Z/NOPB provides basic functionality at lower cost but lacks integrated protection and wide-range programmability.
Availability
LT3092IDD#PBF is available at Aetrix Electronics and suitable for intrinsic safety circuits, 4–20mA loop transmitters, and remote sensor biasing requiring stable component supply, full-temperature-grade assurance, and automotive-qualified variants.
Supply support for LT3092IDD#PBF 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 is a global semiconductor leader specializing in high-performance analog, mixed-signal, and digital signal processing technologies for precision measurement and power management.
The LT3092IDD#PBF belongs to the LT® Precision Current Sources product line, engineered for applications demanding ultra-stable, capacitor-free current regulation in harsh, safety-critical, or space-constrained environments.
FAQ
What is the minimum load current required for LT3092IDD#PBF to regulate?
The LT3092IDD#PBF requires a minimum load current of 0.5mA to maintain regulation. Below this threshold, the internal error amplifier cannot sustain closed-loop control, resulting in loss of current accuracy. This value is specified in the Electrical Characteristics table under "Minimum Load Current" and applies across the full –40°C to +125°C temperature range.
Does LT3092IDD#PBF require input or output capacitors for stability?
No, the LT3092IDD#PBF is designed for stable operation without input or output capacitors under typical conditions. Its high DC and AC output impedance enables capacitor-free use in intrinsic safety and surge-prone applications. However, if long PCB traces or cables introduce inductive reactance, series damping resistors or RC compensation networks may be needed per the Applications Information section.
How is output current calculated for LT3092IDD#PBF?
Output current for LT3092IDD#PBF is calculated as IOUT = 10µA × (RSET/ROUT) + 10µA, where RSET sets VSET = 10µA × RSET, and ROUT connects between OUT and the RSET node. For example, RSET = 20kΩ and ROUT = 100Ω yields IOUT = 2.01mA. Resistor matching temperature coefficients minimizes drift.
What protection features does LT3092IDD#PBF include?
The LT3092IDD#PBF integrates reverse-battery protection (±40V on IN relative to OUT), reverse-current protection, current limiting (200mA min), and thermal shutdown with hysteresis. These functions operate autonomously without external components, making it suitable for unattended or mission-critical current-source applications where fault resilience is essential.
Is LT3092IDD#PBF qualified for automotive applications?
The LT3092IDD#PBF itself is not AEC-Q100 qualified; however, the LT3092 family includes automotive-grade variants such as LT3092IST#WPBF and LT3092EST#WPBF marked with #W suffix. These versions undergo controlled manufacturing and reliability testing per AEC-Q100 standards and are approved for automotive use-LT3092IDD#PBF is intended for industrial and general-purpose applications.
LT3092IDD#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-WFDFN Exposed Pad
- Packaging:
- Tube
- 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#PBF FAQ
1.How can I place an order for LT3092IDD#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT3092IDD#PBF 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#PBF reliable?
The price and inventory of LT3092IDD#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT3092IDD#PBF is usually 5 days.
3.What payment methods are accepted for LT3092IDD#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT3092IDD#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT3092IDD#PBF?
LT3092IDD#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT3092IDD#PBF 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#PBF?
For technical support, including LT3092IDD#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT3092IDD#PBF requirements.
6.How does Aetrix verify that LT3092IDD#PBF is sourced from the original manufacturer or authorized distributors?
All LT3092IDD#PBF 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#PBF meets industry standards.
7.What is the process for return or replacement of LT3092IDD#PBF?
All LT3092IDD#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT3092IDD#PBF, 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#PBF part is unused and in its original packaging.
Return procedure for LT3092IDD#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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