My Inquiry
My Account
Analog Devices Inc. LT1461DHS8-3.3#TRPBF
- Part No.:
- LT1461DHS8-3.3#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Voltage Reference
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LT1461DHS8-3.3#TRPBF.pdf
- Description:
- IC VREF SERIES 0.15% 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,422
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LT1461DHS8-3.3#TRPBF from Analog Devices is a micropower precision low-dropout series voltage reference delivering 3.3V output with ±0.15% initial accuracy, 20ppm/°C max temperature coefficient, 35µA supply current, 50mA output drive, and <300mV dropout at full load - designed for high-accuracy analog signal chains in automotive-grade industrial systems operating from –40°C to 125°C.
For engineers reviewing the LT1461DHS8-3.3#TRPBF datasheet, LT1461DHS8-3.3#TRPBF pinout, LT1461DHS8-3.3#TRPBF application, or LT1461DHS8-3.3#TRPBF equivalent, key selection criteria include guaranteed operation across –40°C to 125°C, AEC-Q100 qualification, thermal hysteresis ≤120ppm over full range, shutdown control via Pin 3, and SO-8 package compatibility with standard PCB layout practices for stress-sensitive precision references.
Technical Context
The LT1461DHS8-3.3#TRPBF implements curvature-compensated bandgap architecture with trimmed thin-film resistors to achieve stable 3.3V output under varying line, load, and thermal conditions. Its internal thermal shutdown activates at TJ ≈ 150°C, and shutdown logic responds to Pin 3 voltage ≤0.8V (low) or ≥2.4V (high), drawing only 35µA in shutdown mode.
It operates with VIN as low as (VOUT + 0.06V) at zero load and up to 20V maximum input, supports 2µF minimum output capacitance for stability, and maintains <12ppm/mA load regulation (0–10mA) and <50ppm/V line regulation across its full temperature range - enabling use in precision regulators, ADC/DAC biasing, and battery-powered instrumentation where long-term drift (60ppm/√kHr) and thermal hysteresis must be tightly controlled.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.3V ±0.15% (±4.95mV) at 25°C, ensuring calibrated system-level accuracy without post-production trimming |
| Tempco | 20ppm/°C max over –40°C to 125°C, limiting output drift to ±2.64mV across full automotive temperature range |
| Supply Current | 35µA typical, enabling multi-year operation from coin-cell or energy-harvesting sources |
| Output Drive | 50mA min sourcing capability, supporting direct driving of op-amp bias networks or LDO error amplifiers |
| Dropout Voltage | ≤300mV at 50mA load, maximizing usable battery voltage down to 3.6V for 3.3V systems |
| Shutdown Current | ≤55µA at RL = 1kΩ, allowing low-power sleep modes without external switching |
| Thermal Hysteresis | 120ppm max (–40°C ↔ 125°C), critical for repeatable calibration in cyclic thermal environments |
Pinout & Package
LT1461DHS8-3.3#TRPBF is housed in an 8-lead plastic SO (SO-8) package with θJA = 190°C/W and TJMAX = 150°C. Pin 1 is top-left corner when notch faces up; Pins 1, 2, 4, 5, 7, and 8 are NC (do not connect). Valid terminals are Pin 3 (SHDN), Pin 6 (VOUT), and Pin 8 (GND); VIN connects externally to VOUT via series resistor or directly if input regulation is provided.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 3 | Shutdown Control Input | Active-low logic interface: ≤0.8V enables shutdown (35µA IQ); ≥2.4V enables normal operation |
| Pin 6 | Reference Output | 3.3V precision source with 50mA drive; requires ≥2µF ceramic output capacitor for stability |
| Pin 8 | Ground Reference | Low-impedance return path for reference and load currents; must be connected to clean analog ground plane |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Qualified | Validated for automotive applications across –40°C to 125°C, including thermal cycling and lifetime reliability testing |
| Curvature-Compensated Bandgap | Enables 20ppm/°C tempco without external compensation components or calibration |
| Low Dropout Operation | Supports 3.3V reference generation from single Li-ion (3.0–4.2V) or dual alkaline (2.4–3.2V) supplies |
| Integrated Thermal Shutdown | Protects against sustained overload by disabling output above ~150°C junction temperature |
| Trimmed Thin-Film Resistors | Deliver ±0.15% initial accuracy without laser trimming or post-package adjustment |
Applications
| Automotive Engine Control Unit (ECU) | Industrial Data Acquisition System |
|---|---|
Use Scenario: Providing stable 3.3V reference for 16-bit SAR ADC sampling crankshaft position and oxygen sensor signals under wide ambient and self-heating conditions. IC Role / Device Role / Timing Role: Precision voltage reference for ADC full-scale calibration and offset nulling in real-time closed-loop engine management. Use Value: 20ppm/°C tempco and 120ppm thermal hysteresis ensure <±3.5mV reference error across –40°C to 125°C engine bay operation, maintaining ASIL-B functional safety compliance. | Use Scenario: Biasing precision op-amps and driving multiplexer reference inputs in modular 8-channel 24-bit sigma-delta DAQ modules deployed in factory automation cabinets. IC Role / Device Role / Timing Role: Primary system reference for analog front-end gain/offset calibration and digital isolator VDDIO biasing. Use Value: 50mA output drive eliminates need for external buffer stages; 35µA quiescent current enables always-on monitoring during standby without compromising battery backup runtime. |
| Portable Medical Glucose Meter | Test & Measurement Calibration Source |
Use Scenario: Supplying excitation voltage and ADC reference for electrochemical sensor strips in handheld glucose analyzers powered by CR2032 coin cells. IC Role / Device Role / Timing Role: Dual-role reference: sets sensor bias current and defines ADC full-scale range for amperometric current measurement. Use Value: 300mV dropout allows >90% battery utilization (down to 3.6V), while ±0.15% accuracy ensures <±0.5% glucose concentration error before digital correction. | Use Scenario: Serving as secondary reference in benchtop multimeters and calibrators requiring traceable 3.3V output with minimal warm-up drift and thermal memory effects. IC Role / Device Role / Timing Role: Stable DC reference node for auto-zeroing circuits and DMM reference divider networks. Use Value: 60ppm/√kHr long-term drift and <8ppmP-P 0.1–10Hz noise enable sub-10ppm measurement repeatability over 24-hour calibration sessions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF3333AIDBVR | 3.3V, ±0.1% init acc, 10ppm/°C max, 3.3µA IQ, 25mA drive, SOT-23-5 package | Limited to –40°C to 125°C but lacks AEC-Q100 qualification; lower drive limits use in high-current regulator feedback | Select for ultra-low-power portable designs where 25mA drive suffices and automotive qualification is not required |
| ADR4533BRZ | 3.3V, ±0.02% init acc, 3ppm/°C max, 950µA IQ, 10mA drive, SO-8 package | Higher precision and lower tempco, but 28× higher supply current and 5× lower output drive; no shutdown pin | Select for metrology-grade instruments where ultimate accuracy outweighs power and drive constraints |
Compared with REF3333AIDBVR and ADR4533BRZ, the LT1461DHS8-3.3#TRPBF uniquely balances automotive-grade temperature range, integrated shutdown, 50mA drive, and micropower operation - making it optimal for ECU sensor interfaces and industrial DAQ modules where robustness, flexibility, and efficiency are jointly critical.
Availability
LT1461DHS8-3.3#TRPBF is available at Aetrix Electronics and suitable for automotive engine control units, industrial data acquisition systems, and portable medical diagnostics requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LT1461DHS8-3.3#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, automotive, communications, and healthcare markets since 1965.
The LT1461 family was engineered to deliver precision voltage references with micropower efficiency and robust thermal performance for automotive and industrial applications demanding guaranteed operation from –40°C to 125°C without derating.
FAQ
What is the maximum input voltage rating for LT1461DHS8-3.3#TRPBF?
The absolute maximum input voltage for LT1461DHS8-3.3#TRPBF is 20V, as specified in the Absolute Maximum Ratings table. Operation above this level risks permanent damage. For reliable long-term performance, VIN should remain ≤20V and maintain a minimum dropout margin of 0.06V at zero load or 0.3V at 50mA per Electrical Characteristics.
Does LT1461DHS8-3.3#TRPBF require external capacitors, and if so, what values?
Yes, LT1461DHS8-3.3#TRPBF requires both input and output capacitors. A minimum 1µF input bypass capacitor is recommended near the VIN pin, and a minimum 2µF ceramic output capacitor (CL) is mandatory on the VOUT pin for stability - especially under loads ≥1mA. The datasheet confirms instability risk without CL ≥2µF in precision regulator configurations.
Is LT1461DHS8-3.3#TRPBF qualified for automotive applications?
Yes, LT1461DHS8-3.3#TRPBF is AEC-Q100 qualified for automotive applications and rated for continuous operation from –40°C to 125°C. It appears in the "AUTOMOTIVE PRODUCTS" section of the datasheet with #WPBF/#WTRPBF variants, and the D-grade HTSOP package meets automotive reliability and thermal cycling requirements.
What is the thermal shutdown threshold of LT1461DHS8-3.3#TRPBF?
The thermal shutdown threshold of LT1461DHS8-3.3#TRPBF is approximately 150°C junction temperature (TJMAX), as stated in the Package Description section. When die temperature exceeds this limit due to excessive power dissipation or ambient heating, the device disables output to prevent damage and automatically recovers once TJ falls below the hysteresis threshold.
How does the shutdown pin (Pin 3) function on LT1461DHS8-3.3#TRPBF?
Pin 3 is an active-low shutdown control: logic low (≤0.8V) places LT1461DHS8-3.3#TRPBF into shutdown mode, reducing supply current to ≤55µA; logic high (≥2.4V) enables normal operation. The pin draws ≤4µA at 0.8V and ≤15µA at 2.4V, enabling direct interfacing with microcontroller GPIOs without level-shifting.
LT1461DHS8-3.3#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:
- ±0.15%
- Temperature Coefficient:
- 20ppm/°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 ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SO
LT1461DHS8-3.3#TRPBF FAQ
1.How can I place an order for LT1461DHS8-3.3#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1461DHS8-3.3#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 LT1461DHS8-3.3#TRPBF reliable?
The price and inventory of LT1461DHS8-3.3#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1461DHS8-3.3#TRPBF is usually 5 days.
3.What payment methods are accepted for LT1461DHS8-3.3#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1461DHS8-3.3#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1461DHS8-3.3#TRPBF?
LT1461DHS8-3.3#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1461DHS8-3.3#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 LT1461DHS8-3.3#TRPBF?
For technical support, including LT1461DHS8-3.3#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1461DHS8-3.3#TRPBF requirements.
6.How does Aetrix verify that LT1461DHS8-3.3#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT1461DHS8-3.3#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 LT1461DHS8-3.3#TRPBF meets industry standards.
7.What is the process for return or replacement of LT1461DHS8-3.3#TRPBF?
All LT1461DHS8-3.3#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1461DHS8-3.3#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 LT1461DHS8-3.3#TRPBF part is unused and in its original packaging.
Return procedure for LT1461DHS8-3.3#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LT1461DHS8-3.3#TRPBF Tags
-
TL431AIDBZR
Texas Instruments
-
TL431BQDBZR
Texas Instruments
-
AN431AN-ATRG1
Diodes Incorporated
-
LM4040CYM3-2.5-TR
Microchip Technology
-
LM4040CYM3-4.1-TR
Microchip Technology
-
LM4040EIM3-2.5/NOPB
Texas Instruments
-
AZ431LBNTR-G1
Diodes Incorporated
-
LM4040D20IDBZR
Texas Instruments
-
LM4041DIM3-ADJ/NOPB
Texas Instruments
-
LM4040DIM3X-2.5/NOPB
Texas Instruments
-
LM4040DIM3-2.5/NOPB
Texas Instruments
-
AZ431LANTR-G1
Diodes Incorporated
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
