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Analog Devices Inc. LT1461BIS8-3.3#TRPBF
- Part No.:
- LT1461BIS8-3.3#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Voltage Reference
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LT1461BIS8-3.3#TRPBF.pdf
- Description:
- IC VREF SERIES 0.06% 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,816
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Product details
Overview
LT1461BIS8-3.3#TRPBF from Analog Devices is a micropower precision low-dropout series voltage reference delivering 3.3V output with ±0.06% initial accuracy, 7ppm/°C max temperature coefficient, 35µA supply current, and 50mA output drive capability. It operates across –40°C to +85°C and integrates shutdown control and thermal limiting for use in portable instrumentation and precision ADC/DAC biasing.
For engineers reviewing the LT1461BIS8-3.3#TRPBF datasheet, LT1461BIS8-3.3#TRPBF pinout, LT1461BIS8-3.3#TRPBF application, or LT1461BIS8-3.3#TRPBF equivalent, key selection considerations include guaranteed industrial-temperature performance, low dropout (≤300mV at 50mA), load regulation (≤30ppm/mA), thermal hysteresis (75ppm over –40°C to 85°C), and SO-8 package compatibility with standard PCB layout practices.
Technical Context
The LT1461BIS8-3.3#TRPBF uses curvature-compensated bandgap architecture with trimmed thin-film resistors to achieve stable 3.3V output across temperature. Its internal shutdown circuit enables full-load switching with ≤35µA quiescent current in disabled state and 200µs turn-on time.
It features active thermal shutdown at TJ ≈ 150°C and supports output capacitance down to 1µF for light loads or ≥2µF for 50mA operation. Line regulation is specified at 2–12ppm/V and load regulation at 12–30ppm/mA depending on grade and conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.3V ±0.06% (±1.98mV) - ensures stable bias for 12-bit+ data converters without calibration |
| Temp Coefficient | 7ppm/°C max - contributes ≤±588ppm error over –40°C to +85°C operating range |
| Supply Current | 35µA typical - enables multi-year battery life in low-power sensor nodes |
| Dropout Voltage | ≤300mV at 50mA - allows operation from 3.6V supply while maintaining full accuracy |
| Output Drive | 50mA min - supports direct driving of op-amp references or small LDOs |
| Shutdown Current | ≤35µA - reduces system standby power without external switch |
| Thermal Hysteresis | 75ppm over –40°C to 85°C - limits repeatability error in cyclic thermal environments |
Pinout & Package
LT1461BIS8-3.3#TRPBF is housed in an 8-lead plastic SOIC (SO-8) package with θJA = 190°C/W and JEDEC MS-012AC compliant footprint. Pin 1 is located at the top-left corner with dot marking; leads are gull-wing, surface-mount compatible.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Reference ground return - must connect to low-impedance analog ground plane |
| 2 | VIN | Input supply - requires ≥3.6V input for 3.3V output at full load with margin |
| 3 | SHDN | Active-low shutdown control - logic low ≤0.8V disables output; high ≥2.4V enables |
| 4–5, 7–8 | DNC | No-connect terminals - must remain unconnected per datasheet |
| 6 | VOUT | Regulated 3.3V output - requires ≥2µF ceramic capacitor for stability at 50mA load |
Key Features
| Feature | Design Value |
|---|---|
| Micropower operation | 35µA supply current enables >10-year battery life in coin-cell-powered IoT sensors |
| Low dropout | 300mV max dropout at 50mA allows use with single Li-ion or 3×AA supplies |
| Industrial temp range | –40°C to +85°C guaranteed operation supports deployment in factory automation and outdoor metering |
| Integrated shutdown | Logic-controlled disable reduces system standby current without external MOSFET or controller |
| Thermal protection | Internal thermal shutdown prevents damage during overload or poor heatsinking |
Applications
| Portable Data Acquisition | Precision Power Supply Monitoring |
|---|---|
Use Scenario: Battery-powered handheld multimeter measuring voltage, current, and resistance with 16-bit SAR ADC. IC Role / Device Role / Timing Role: Provides stable 3.3V reference for ADC and DAC, enabling <±0.01% measurement linearity. Use Value: 7ppm/°C drift and 0.06% initial accuracy eliminate need for on-board calibration across operating temperature. | Use Scenario: Industrial PLC module monitoring 24V DC rail voltage with ±0.1% tolerance requirement. IC Role / Device Role / Timing Role: Supplies precise 3.3V reference to comparator and ADC used in rail supervision circuit. Use Value: 50mA drive supports simultaneous biasing of multiple comparators and filtering op-amps without external buffer. |
| Medical Sensor Front-End | Automotive Body Control Module |
Use Scenario: Wearable ECG patch digitizing biopotential signals using low-noise instrumentation amplifier and 14-bit ADC. IC Role / Device Role / Timing Role: Serves as master reference for signal chain gain-setting and ADC conversion. Use Value: 35µA quiescent current extends wearable runtime; shutdown mode cuts reference contribution to sub-µA sleep current. | Use Scenario: BCM monitoring battery voltage, interior lighting PWM, and door lock actuator status in 12V automotive system. IC Role / Device Role / Timing Role: Supplies accurate 3.3V reference to microcontroller ADC and analog monitoring circuits. Use Value: –40°C to +85°C rating and AEC-Q100-compatible design ensure reliability in under-hood and cabin environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF3033AIDBZR | 3.3V, 0.2% initial accuracy, 50ppm/°C, 50µA supply current, SOT-23-3 | Larger initial error and drift; smaller package but no shutdown pin | Choose for cost-sensitive, space-constrained designs where ±0.2% accuracy suffices and shutdown is not required |
| ADR3433ARJZ-R7 | 3.3V, 0.1% initial accuracy, 10ppm/°C, 120µA supply current, SOT-23-5 | Higher supply current and wider drift spec; includes enable but no thermal shutdown | Prefer when higher output drive (>10mA) and enable functionality are needed, and thermal robustness is secondary |
Compared with REF3033AIDBZR and ADR3433ARJZ-R7, the LT1461BIS8-3.3#TRPBF offers superior initial accuracy (0.06% vs ≥0.1%), lower drift (7ppm/°C vs ≥10ppm/°C), integrated thermal shutdown, and lower quiescent current-making it optimal for high-precision, thermally demanding industrial and portable applications.
Availability
LT1461BIS8-3.3#TRPBF is available at Aetrix Electronics and suitable for portable instrumentation, precision power monitoring, and medical sensor front-end designs requiring stable component supply with industrial-temperature support and long-term reliability.
Supply support for LT1461BIS8-3.3#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 healthcare markets.
The LT1461 family was designed specifically for precision voltage reference applications demanding micropower operation, low drift, and robust industrial-temperature performance-enabling high-resolution data acquisition without external trimming or calibration.
FAQ
What is the maximum load current supported by the LT1461BIS8-3.3#TRPBF?
The LT1461BIS8-3.3#TRPBF supports a minimum output current of 50mA under specified conditions. It can deliver up to 100mA short-circuit current, though sustained operation above 50mA requires careful thermal management due to its SO-8 package's 190°C/W junction-to-ambient thermal resistance. For continuous 50mA operation, input voltage must exceed VOUT by ≥0.5V to maintain regulation and avoid thermal shutdown.
Does the LT1461BIS8-3.3#TRPBF require external capacitors, and if so, what values?
Yes, the LT1461BIS8-3.3#TRPBF requires both input and output capacitors for stability. A minimum 1µF ceramic capacitor is required on VIN (bypass), and a minimum 2µF ceramic capacitor is required on VOUT for full 50mA load capability. For loads ≤1mA, 1µF on VOUT may suffice. These values are specified in the Applications Information section and validated across temperature and line/load transients.
How does the shutdown function operate on the LT1461BIS8-3.3#TRPBF?
The LT1461BIS8-3.3#TRPBF shutdown pin (Pin 3) is active-low. Driving it to ≤0.8V disables the output and reduces supply current to ≤35µA. The part resumes normal operation within 200µs after SHDN rises to ≥2.4V. During shutdown, VOUT is high-impedance-not actively pulled low-so external pull-down may be needed if sinking is required in system sleep states.
What is the thermal hysteresis specification for the LT1461BIS8-3.3#TRPBF?
The LT1461BIS8-3.3#TRPBF exhibits 75ppm thermal hysteresis over the –40°C to +85°C temperature range, as measured on soldered units per datasheet Figure G30. This represents the maximum reversible output shift observed after cycling between extremes and returning to 25°C, and is critical for applications requiring repeatable measurements across thermal cycles.
Is the LT1461BIS8-3.3#TRPBF qualified for automotive applications?
No, the LT1461BIS8-3.3#TRPBF is rated for industrial temperature (–40°C to +85°C) but is not AEC-Q100 qualified. For automotive use, Analog Devices offers the LT1461DHS8-3.3#WTRPBF variant, which carries the #W suffix and meets AEC-Q100 Grade 1 requirements (–40°C to +125°C) with controlled manufacturing and automotive reliability reporting.
LT1461BIS8-3.3#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):
- 3.3V
- 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:
- 3.8V ~ 20V
- Current - Supply:
- 70µA
- Current - Cathode:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SO
LT1461BIS8-3.3#TRPBF FAQ
1.How can I place an order for LT1461BIS8-3.3#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1461BIS8-3.3#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 LT1461BIS8-3.3#TRPBF reliable?
The price and inventory of LT1461BIS8-3.3#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1461BIS8-3.3#TRPBF is usually 5 days.
3.What payment methods are accepted for LT1461BIS8-3.3#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1461BIS8-3.3#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1461BIS8-3.3#TRPBF?
LT1461BIS8-3.3#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1461BIS8-3.3#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 LT1461BIS8-3.3#TRPBF?
For technical support, including LT1461BIS8-3.3#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1461BIS8-3.3#TRPBF requirements.
6.How does Aetrix verify that LT1461BIS8-3.3#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT1461BIS8-3.3#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 LT1461BIS8-3.3#TRPBF meets industry standards.
7.What is the process for return or replacement of LT1461BIS8-3.3#TRPBF?
All LT1461BIS8-3.3#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1461BIS8-3.3#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 LT1461BIS8-3.3#TRPBF part is unused and in its original packaging.
Return procedure for LT1461BIS8-3.3#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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