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Analog Devices Inc. LT1461ACS8-5#TRPBF
- Part No.:
- LT1461ACS8-5#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Voltage Reference
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LT1461ACS8-5#TRPBF.pdf
- Description:
- IC VREF SERIES 0.04% 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,494
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Product details
Overview
LT1461ACS8-5#TRPBF from Analog Devices is a 5V, low-dropout micropower precision voltage reference IC with 0.04% initial accuracy, 3ppm/°C max temperature coefficient, and 35µA supply current. It delivers up to 50mA output drive while maintaining <300mV dropout at zero load, enabling high-accuracy ADC/DAC biasing and precision regulator applications in battery-powered instrumentation.
For engineers reviewing the LT1461ACS8-5#TRPBF datasheet, LT1461ACS8-5#TRPBF pinout, LT1461ACS8-5#TRPBF application, or LT1461ACS8-5#TRPBF equivalent, this device supports critical low-power, high-stability analog subsystems where thermal regulation, shutdown control, and AEC-Q100-compliant operation (in higher-grade variants) are essential selection criteria.
Technical Context
The LT1461ACS8-5#TRPBF implements curvature-compensated bandgap architecture with trimmed thin-film resistors for precision output stability. Its internal thermal shutdown activates at ~150°C junction temperature, and the SHDN pin enables logic-controlled power-down with ≤35µA shutdown current.
It operates across 0°C to 70°C ambient, supports input voltages from (VOUT + 0.3V) to 20V, and achieves 12ppm/mA load regulation and 2ppm/V line regulation - enabling direct use in high-resolution data acquisition systems without additional buffering.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 5.000V ±0.04% (±2mV), calibrated at 25°C for high-accuracy DAC/ADC reference rails |
| Tempco | 3ppm/°C max over 0°C–70°C - ensures ≤150µV drift across full operating range |
| Supply Current | 35µA typical - enables multi-year operation from coin-cell batteries in portable sensors |
| Dropout Voltage | ≤300mV at IOUT = 0mA - maximizes usable battery voltage down to 5.3V before regulation loss |
| Output Drive | 50mA min sourcing capability - directly powers op-amp bias networks or small LDOs |
| Load Regulation | 12ppm/mA - introduces only 0.6mV error at full 50mA load, critical for precision feedback paths |
| Shutdown Current | ≤35µA - allows system-level power gating without external switches |
Pinout & Package
LT1461ACS8-5#TRPBF uses an 8-lead plastic SO (SO-8) package with exposed pad not connected. Pin 1 is VIN, Pin 3 is SHDN, Pin 4 is GND, Pin 6 is VOUT, and Pins 2,5,7,8 are DNC (do not connect).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VIN | Main power input; accepts 5.3V–20V with ≥0.3V headroom above VOUT |
| 3 | SHDN | Active-low shutdown control; ≥2.4V = active, ≤0.5V = shutdown mode |
| 4 | GND | Analog ground reference; must be low-impedance connection to minimize noise coupling |
| 6 | VOUT | Stable 5V reference output; requires ≥2µF ceramic output capacitor for stability |
| 2,5,7,8 | DNC | No internal connection; must remain unconnected per datasheet to avoid malfunction |
Key Features
| Feature | Design Value |
|---|---|
| Trimmed initial accuracy | 0.04% max error enables 14-bit system calibration without trimming |
| Low thermal hysteresis | 40ppm max over 0°C–70°C cycle - preserves calibration integrity after thermal cycling |
| Integrated thermal shutdown | Protects against sustained overload by limiting TJ to ~150°C, preventing permanent drift shift |
| High PSRR | ≥60dB ripple rejection at 100Hz - suppresses switching regulator noise in mixed-signal PCBs |
| Wide input range | Operates from (VOUT + 0.3V) to 20V - compatible with 5V, 12V, and 19V supply rails |
Applications
| Portable Data Loggers | Precision Industrial Sensors |
|---|---|
Use Scenario: Battery-powered environmental monitoring node measuring temperature, humidity, and gas concentration with 16-bit ADC. IC Role / Device Role / Timing Role: Primary 5V reference for SAR ADC and signal-chain op-amps, providing stable excitation and conversion基准. Use Value: 35µA quiescent current extends 2xAA battery life beyond 5 years; 3ppm/°C tempco ensures <1LSB error across –20°C to 60°C field deployment. | Use Scenario: 4–20mA loop-powered transmitter with HART communication and local display. IC Role / Device Role / Timing Role: Reference for DAC generating precise current setpoint and for analog front-end gain calibration. Use Value: 50mA output drive powers internal LDOs and display backlight drivers; shutdown pin enables HART modem sleep mode without external FET. |
| Medical Patient Monitors | Automotive Body Control Modules |
Use Scenario: Portable ECG/SpO₂ unit requiring clinical-grade analog signal fidelity and FDA-compliant long-term stability. IC Role / Device Role / Timing Role: Master reference for simultaneous sampling of multiple biopotential channels and internal self-test circuits. Use Value: 0.04% initial accuracy and 60ppm/√kHr long-term drift meet IEC 60601-2-27 stability requirements; thermal hysteresis <40ppm prevents calibration drift during patient-warm-up cycles. | Use Scenario: In-vehicle infotainment power management IC with integrated ADC for rail monitoring and thermal sensing. IC Role / Device Role / Timing Role: 5V reference for 12-bit ADC measuring 5V, 3.3V, and 1.8V supply margins and die temperature. Use Value: AEC-Q100 qualified variants (e.g., LT1461DHS8-5) ensure automotive reliability; SO-8 package supports reflow-compatible assembly in high-vibration environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF5050AIDR | 5V, 0.05% initial accuracy, 3ppm/°C, 950µA supply current, SO-8 | Higher power consumption limits use in ultra-low-power designs | Select when higher PSRR (>85dB) and lower noise (3.8µVRMS) outweigh quiescent current constraints |
| ADR4550BRZ | 5V, 0.02% initial accuracy, 2ppm/°C, 950µA supply current, SO-8 | Lacks shutdown pin and thermal protection; requires external enable circuitry | Choose for metrology-grade accuracy where continuous operation and board space permit larger decoupling |
Compared with REF5050AIDR and ADR4550BRZ, the LT1461ACS8-5#TRPBF provides unique micropower operation (35µA vs >900µA) with integrated shutdown and thermal safety - making it optimal for portable, battery-constrained, and safety-critical embedded systems where power budget and fault resilience are primary design drivers.
Availability
LT1461ACS8-5#TRPBF is available at Aetrix Electronics and suitable for precision data acquisition, portable medical instrumentation, and industrial sensor transmitters requiring stable component supply with guaranteed 0°C to 70°C performance.
Supply support for LT1461ACS8-5#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 low-power, high-accuracy voltage reference applications demanding micropower operation, low thermal drift, and robust output drive - targeting portable instrumentation, precision regulators, and A/D converter biasing.
FAQ
What is the maximum input voltage for LT1461ACS8-5#TRPBF?
The absolute maximum input voltage for LT1461ACS8-5#TRPBF is 20V. Operation is specified for VIN between (VOUT + 0.3V) = 5.3V and 20V. Exceeding 20V risks permanent damage per Absolute Maximum Ratings. For reliable long-term operation, maintain VIN ≤19V with adequate derating margin, especially under high ambient temperature conditions where thermal stress increases.
Does LT1461ACS8-5#TRPBF require external capacitors?
Yes, LT1461ACS8-5#TRPBF requires both input and output capacitors for stability. A minimum 1µF ceramic capacitor on VIN (within 2 inches of the part) serves as supply bypass. A minimum 2µF ceramic capacitor on VOUT is mandatory for frequency compensation and transient response; omitting it causes oscillation or excessive overshoot during load steps. The datasheet specifies CIN = 1µF and CL = 2µF for all performance curves.
Can LT1461ACS8-5#TRPBF be used in automotive applications?
The LT1461ACS8-5#TRPBF is rated for 0°C to 70°C and is not AEC-Q100 qualified. For automotive use, select the LT1461DHS8-5#WTRPBF variant, which is manufactured under controlled automotive processes, qualified to AEC-Q100 Grade 0 (–40°C to 125°C), and shipped with automotive reliability reports. Using LT1461ACS8-5#TRPBF in automotive environments voids warranty and risks thermal failure outside its specified range.
What is the typical turn-on time for LT1461ACS8-5#TRPBF?
The typical turn-on time for LT1461ACS8-5#TRPBF is 200µs, measured from SHDN rising above 2.4V to VOUT settling within 0.1% of final value under 25mA load and CL = 2µF. This fast wake-up supports duty-cycled sensor nodes and intermittent measurement systems. Turn-on time increases slightly with larger output capacitance or heavier loads but remains under 500µs for CL ≤10µF and IOUT ≤50mA.
How does thermal hysteresis affect LT1461ACS8-5#TRPBF accuracy?
Thermal hysteresis for LT1461ACS8-5#TRPBF is 40ppm maximum over 0°C to 70°C cycling, meaning output voltage may shift up to ±200µV depending on prior thermal history. This occurs due to mechanical stress relaxation in the SO-8 package and PCB mounting. To minimize impact, mount the device near board edges or use PCB slots around the footprint - techniques that reduce hysteresis-induced errors to <10ppm in validated layouts.
LT1461ACS8-5#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):
- 5V
- Voltage - Output (Max):
- -
- Current - Output:
- 100 mA
- Tolerance:
- ±0.04%
- Temperature Coefficient:
- 3ppm/°C
- Noise - 0.1Hz to 10Hz:
- 8ppmp-p
- Noise - 10Hz to 10kHz:
- 9.6ppmrms
- Voltage - Input:
- 5.5V ~ 20V
- Current - Supply:
- 70µA
- Current - Cathode:
- -
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SO
LT1461ACS8-5#TRPBF FAQ
1.How can I place an order for LT1461ACS8-5#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1461ACS8-5#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 LT1461ACS8-5#TRPBF reliable?
The price and inventory of LT1461ACS8-5#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1461ACS8-5#TRPBF is usually 5 days.
3.What payment methods are accepted for LT1461ACS8-5#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1461ACS8-5#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1461ACS8-5#TRPBF?
LT1461ACS8-5#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1461ACS8-5#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 LT1461ACS8-5#TRPBF?
For technical support, including LT1461ACS8-5#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1461ACS8-5#TRPBF requirements.
6.How does Aetrix verify that LT1461ACS8-5#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT1461ACS8-5#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 LT1461ACS8-5#TRPBF meets industry standards.
7.What is the process for return or replacement of LT1461ACS8-5#TRPBF?
All LT1461ACS8-5#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1461ACS8-5#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 LT1461ACS8-5#TRPBF part is unused and in its original packaging.
Return procedure for LT1461ACS8-5#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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