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Analog Devices Inc. LT1461BIS8-3#TRPBF
- Part No.:
- LT1461BIS8-3#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Voltage Reference
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LT1461BIS8-3#TRPBF.pdf
- Description:
- IC VREF SERIES 0.06% 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,279
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Product details
Overview
LT1461BIS8-3#TRPBF from Analog Devices is a precision 3.0V low-dropout series voltage reference IC with ±0.06% initial accuracy, 7ppm/°C max temperature coefficient, and 35µA typical supply current. It delivers up to 50mA output drive while maintaining <300mV dropout at full load, enabling use in battery-powered instrumentation and high-accuracy ADC/DAC biasing circuits.
For engineers reviewing the LT1461BIS8-3#TRPBF datasheet, LT1461BIS8-3#TRPBF pinout, LT1461BIS8-3#TRPBF application, or LT1461BIS8-3#TRPBF equivalent, key selection criteria include industrial-temperature operation (–40°C to +85°C), shutdown control capability, thermal hysteresis performance (75ppm over –40°C to +85°C), and SO-8 package compatibility with standard PCB layout practices for precision analog systems.
Technical Context
The LT1461BIS8-3#TRPBF implements curvature-compensated bandgap architecture with trimmed thin-film resistors for stable 3.0V output. Its internal shutdown circuitry enables logic-level control (Pin 3) with <0.8V low threshold and <4µA leakage, allowing system-level power sequencing.
Designed for low-noise, low-drift applications, it achieves 9.6ppmRMS noise (10Hz–1kHz) and exhibits <12ppm/mA load regulation under 50mA sourcing. Thermal shutdown activates at ~150°C junction temperature, protecting against sustained overload conditions without external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.0V ±0.06% (±1.8mV) - ensures direct compatibility with 3.0V ADC reference inputs without calibration overhead |
| Tempco | 7ppm/°C max - limits drift to ≤525ppm over –40°C to +85°C operating range, supporting 14-bit system accuracy |
| Supply Current | 35µA typ / 50µA max - enables multi-year battery life in portable data loggers and sensor nodes |
| Dropout Voltage | 0.3V max at 50mA - allows operation from 3.3V rails with ≥300mV headroom, maximizing usable battery voltage |
| Output Drive | 50mA min sourcing - supports direct driving of op-amp bias networks and precision regulator error amplifiers |
| Shutdown Current | 35µA max - maintains ultra-low standby power while preserving fast wake-up (<200µs turn-on time) |
| Thermal Hysteresis | 75ppm over –40°C to +85°C - quantifies post-temperature-cycle output shift affecting repeatability in field-deployed instruments |
Pinout & Package
LT1461BIS8-3#TRPBF uses an 8-lead plastic SO (SO-8) package with θJA = 190°C/W and lead-free finish. Pin 1 is located at the top-left corner when viewing the top side with marking dot oriented left.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Reference ground return path; must connect to clean analog ground plane to minimize noise coupling |
| 2 | VIN | Input supply terminal; requires ≥1µF bypass capacitor within 2 inches to suppress supply ripple |
| 3 | SHDN | Active-low shutdown control; drives <4µA at 0.8V threshold, enabling microcontroller GPIO interfacing |
| 4 | DNC | No-connect terminal; must remain unconnected per datasheet to avoid parametric degradation |
| 5 | DNC | No-connect terminal; floating connection prevents unintended parasitic paths in high-impedance nodes |
| 6 | VOUT | Regulated 3.0V output; requires ≥2µF ceramic capacitor for stability under >1mA loads |
| 7 | DNC | No-connect terminal; isolation from adjacent pins reduces crosstalk in mixed-signal layouts |
| 8 | DNC | No-connect terminal; maintains symmetry and thermal balance across package body |
Key Features
| Feature | Design Value |
|---|---|
| Low Dropout Operation | 300mV max at 50mA enables use with 3.3V supplies while preserving ≥300mV margin for line regulation |
| Industrial Temperature Range | –40°C to +85°C guaranteed operation supports deployment in factory automation and outdoor monitoring equipment |
| Shutdown Control | Logic-compatible SHDN pin allows microcontroller-driven power cycling without external FETs or level shifters |
| High Output Drive | 50mA sourcing eliminates need for external buffer stages in precision regulator feedback loops |
| Thermal Shutdown Protection | Internal 150°C trip point prevents damage during sustained overload or poor heatsinking conditions |
| Low Long-Term Drift | 60ppm/√kHr aging rate ensures minimal calibration drift over 5+ years in deployed instrumentation |
Applications
| Portable Data Acquisition | Precision Power Supply Reference |
|---|---|
Use Scenario: Battery-powered handheld multimeter sampling 16-bit SAR ADC at 100ksps with auto-ranging. IC Role / Device Role / Timing Role: Provides stable 3.0V reference for ADC VREF input and DAC output scaling. Use Value: 7ppm/°C tempco and 35µA supply current extend battery life while maintaining ±0.01% measurement accuracy across operating temperature. |
Use Scenario: Programmable bench power supply requiring 0.01% output voltage stability over 0–30V range. IC Role / Device Role / Timing Role: Serves as master reference for error amplifier in linear regulator feedback loop. Use Value: 50mA output drive directly biases op-amp inputs without gain-stage buffering, reducing component count and thermal drift sources. |
| Automated Test Equipment | Industrial Sensor Signal Conditioning |
Use Scenario: PXI-based DAQ module performing simultaneous 12-channel thermocouple measurements. IC Role / Device Role / Timing Role: Supplies excitation voltage and reference for cold-junction compensation circuitry. Use Value: Shutdown capability synchronizes reference activation with channel scan timing, cutting system idle power by 92%. |
Use Scenario: 4–20mA transmitter conditioning RTD bridge outputs in oil & gas pipeline monitoring. IC Role / Device Role / Timing Role: Generates precise 3.0V bias for Wheatstone bridge and ADC reference. Use Value: 75ppm thermal hysteresis specification ensures repeatable calibration after field temperature cycling between –40°C and +85°C. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF3030AIDBZR | 3.0V, ±0.2% initial accuracy, 50ppm/°C tempco, SOT-23-3 package, 50µA supply current | Limited to 25mA output drive; no shutdown pin; smaller footprint but higher drift | Select for space-constrained designs where 12-bit accuracy suffices and shutdown is unnecessary |
| ADR3430ARJZ-R7 | 3.0V, ±0.1% initial accuracy, 10ppm/°C tempco, SOT-23-5 package, 45µA supply current | Includes enable pin but lacks thermal shutdown; requires external bypass capacitors | Choose when moderate tempco and enable functionality are prioritized over industrial temperature range |
Compared with REF3030AIDBZR and ADR3430ARJZ-R7, the LT1461BIS8-3#TRPBF provides superior initial accuracy (±0.06% vs ≥±0.1%), lower tempco (7ppm/°C vs ≥10ppm/°C), integrated thermal shutdown, and higher output drive-making it optimal for 14-bit+ industrial instrumentation where long-term stability and fault protection are critical.
Availability
LT1461BIS8-3#TRPBF is available at Aetrix Electronics and suitable for portable instrumentation, precision power supplies, automated test equipment, and industrial sensor signal conditioning requiring stable component supply across extended temperature ranges.
Supply support for LT1461BIS8-3#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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, communications, automotive, and consumer markets since 1965.
The LT1461 family was engineered specifically for micropower, high-accuracy voltage reference applications demanding low dropout, wide temperature operation, and robust output drive-targeting precision data conversion and regulation systems.
FAQ
What is the maximum load current supported by the LT1461BIS8-3#TRPBF?
The LT1461BIS8-3#TRPBF guarantees minimum 50mA sourcing capability under specified conditions (VIN ≥ VOUT + 2.5V). It can deliver up to 100mA short-circuit current, though thermal shutdown activates if junction temperature exceeds ~150°C. For continuous 50mA operation, ensure adequate PCB copper area or heatsinking given its 190°C/W thermal resistance.
Does the LT1461BIS8-3#TRPBF require external capacitors for stability?
Yes, the LT1461BIS8-3#TRPBF requires both input and output capacitors. A minimum 1µF ceramic capacitor on VIN (within 2 inches) serves as supply bypass, while ≥2µF on VOUT is mandatory for stability under loads >1mA. Omitting the output capacitor causes oscillation and output inaccuracy, as confirmed in the Applications Information section.
How does the shutdown feature operate on the LT1461BIS8-3#TRPBF?
The LT1461BIS8-3#TRPBF enters shutdown when Pin 3 (SHDN) is pulled below 0.5V, reducing supply current to ≤35µA. It resumes normal operation within 200µs when SHDN rises above 2.4V. The pin draws <4µA at 0.8V, enabling direct interface with 3.3V or 5V logic outputs without level-shifting circuitry.
What is the thermal hysteresis specification for the LT1461BIS8-3#TRPBF?
The LT1461BIS8-3#TRPBF exhibits 75ppm thermal hysteresis over the –40°C to +85°C temperature range, measured as output voltage shift after cycling between extremes and returning to 25°C. This value reflects worst-case behavior of soldered units on PCBs and impacts repeatability in field-deployed instruments subjected to ambient temperature swings.
Can the LT1461BIS8-3#TRPBF be used in automotive applications?
The LT1461BIS8-3#TRPBF is rated for –40°C to +85°C operation and meets industrial reliability standards, but it is not AEC-Q100 qualified. For automotive applications, Analog Devices offers the LT1461DHS8-3#TRPBF variant (–40°C to +125°C, AEC-Q100 Grade 1), which shares identical electrical specifications but undergoes additional automotive-grade qualification testing.
LT1461BIS8-3#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Reference Type:
- Series
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 3V
- Voltage - Output (Max):
- -
- Current - Output:
- 100 mA
- Tolerance:
- ±0.06%
- Temperature Coefficient:
- 7ppm/°C
- Noise - 0.1Hz to 10Hz:
- 8ppmp-p
- Noise - 10Hz to 10kHz:
- 9.6ppmrms
- Voltage - Input:
- 3.5V ~ 20V
- Current - Supply:
- 70µA
- Current - Cathode:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SO
LT1461BIS8-3#TRPBF FAQ
1.How can I place an order for LT1461BIS8-3#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1461BIS8-3#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 LT1461BIS8-3#TRPBF reliable?
The price and inventory of LT1461BIS8-3#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1461BIS8-3#TRPBF is usually 5 days.
3.What payment methods are accepted for LT1461BIS8-3#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1461BIS8-3#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1461BIS8-3#TRPBF?
LT1461BIS8-3#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1461BIS8-3#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 LT1461BIS8-3#TRPBF?
For technical support, including LT1461BIS8-3#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1461BIS8-3#TRPBF requirements.
6.How does Aetrix verify that LT1461BIS8-3#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT1461BIS8-3#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 LT1461BIS8-3#TRPBF meets industry standards.
7.What is the process for return or replacement of LT1461BIS8-3#TRPBF?
All LT1461BIS8-3#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1461BIS8-3#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 LT1461BIS8-3#TRPBF part is unused and in its original packaging.
Return procedure for LT1461BIS8-3#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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