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Analog Devices Inc. LT1461BCS8-4#TRPBF
- Part No.:
- LT1461BCS8-4#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Voltage Reference
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LT1461BCS8-4#TRPBF.pdf
- Description:
- IC VREF SERIES 0.06% 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,039
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Product details
Overview
LT1461BCS8-4#TRPBF from Analog Devices is a micropower precision low-dropout series voltage reference delivering 4.096V output with ±0.06% initial accuracy, 7ppm/°C max temperature coefficient, and 35µA typical supply current. It provides 50mA output drive capability and supports shutdown control, making it suitable for high-accuracy data acquisition systems requiring stable excitation in portable instrumentation.
For engineers reviewing the LT1461BCS8-4#TRPBF datasheet, LT1461BCS8-4#TRPBF pinout, LT1461BCS8-4#TRPBF application, or LT1461BCS8-4#TRPBF equivalent, key selection criteria include guaranteed 0°C to 70°C operation, SO-8 package compatibility, thermal hysteresis ≤75ppm over –40°C to 85°C, and load regulation of 30ppm/mA up to 50mA.
Technical Context
The LT1461BCS8-4#TRPBF uses curvature-compensated bandgap architecture with trimmed thin-film resistors to achieve tight initial accuracy and low drift. Its internal shutdown circuit enables full-load current switching with <35µA quiescent current in disabled state.
It features thermal shutdown at 150°C junction temperature and operates with dropout voltage as low as 130mV at 1mA load. Line regulation is specified at 8ppm/V and output noise is 8ppmP-P (0.1Hz–10Hz), supporting high-resolution ADC/DAC biasing without added filtering.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 4.096V ±0.06% - Enables precise 12-bit DAC/ADC full-scale calibration without trimming. |
| Temp Coefficient | 7ppm/°C max - Ensures ≤0.35mV drift over 0°C to 70°C ambient range. |
| Supply Current | 35µA typ - Supports battery-powered devices with multi-year runtime at µA-level sleep currents. |
| Dropout Voltage | 0.13V at 1mA - Permits operation from single-cell Li-ion (3.0V min) while maintaining reference stability. |
| Output Drive | 50mA min - Directly powers precision op-amp buffers or drives multiple SAR ADC references. |
| Load Regulation | 30ppm/mA - Limits output shift to ≤1.5mV across full 50mA load range. |
| Shutdown Current | 35µA max - Maintains ultra-low power state during system sleep without external switch. |
Pinout & Package
LT1461BCS8-4#TRPBF is housed in an 8-lead plastic SO (SO-8) package with standard 1.27mm pitch, JEDEC MS-012AC compliant, and rated for θJA = 190°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (NC) | No Connect | Internally unconnected; must remain floating per datasheet. |
| 2 (VIN) | Input Supply | Accepts 4.396V–20V input; dropout headroom defined relative to VOUT. |
| 3 (SHDN) | Shutdown Control | Active-low logic input; ≥2.4V enables, ≤0.5V disables output and reduces supply current. |
| 4 (GND) | Analog Ground | Reference return path; requires low-impedance connection to minimize ground bounce errors. |
| 5 (NC) | No Connect | Internally unconnected; must remain floating. |
| 6 (VOUT) | Reference Output | 4.096V precision source; requires ≥2µF ceramic output capacitor for stability under 50mA loads. |
| 7 (NC) | No Connect | Internally unconnected; must remain floating. |
| 8 (NC) | No Connect | Internally unconnected; must remain floating. |
Key Features
| Feature | Design Value |
|---|---|
| Low Dropout Operation | 0.13V at 1mA enables use with 4.2V Li-ion batteries while preserving full 4.096V accuracy. |
| Thermal Shutdown Protection | Activates at ~150°C junction temperature to prevent damage during overload or poor heatsinking. |
| High Output Drive | 50mA sourcing capability eliminates need for external buffer in most precision regulator designs. |
| Shutdown Functionality | Reduces supply current to ≤35µA while retaining fast 200µs wake-up time for responsive power management. |
| Stable Under Load Transients | Maintains ≤20mV deviation during 50mA load steps with 2µF output capacitance. |
Applications
| Portable Data Loggers | Industrial Process Transmitters |
|---|---|
Use Scenario: Battery-powered environmental sensor nodes recording temperature, pressure, and humidity at 16-bit resolution over multi-year deployments. IC Role / Device Role / Timing Role: Provides stable 4.096V reference for successive-approximation ADCs and excitation for RTD/thermistor bridges. Use Value: 7ppm/°C drift ensures ≤0.7mV error over operating range; 35µA supply current extends battery life beyond 5 years. | Use Scenario: 4–20mA loop-powered field transmitters converting analog sensor outputs to digital values for PLC communication. IC Role / Device Role / Timing Role: Supplies precision reference for sigma-delta ADCs and programmable gain amplifiers in isolated signal chains. Use Value: 50mA output drive powers internal isolators and DACs; shutdown mode reduces loop current during diagnostics. |
| Medical Patient Monitors | Test & Measurement Equipment |
Use Scenario: Portable ECG and pulse oximetry units requiring clinical-grade accuracy and low-noise analog front ends. IC Role / Device Role / Timing Role: Serves as master reference for dual-slope or SAR ADCs digitizing biopotential signals with >14-bit ENOB. Use Value: 8ppmP-P noise (0.1–10Hz) prevents reference-induced artifacts in sub-µV bio-signal measurements. | Use Scenario: Benchtop multimeters and calibration sources needing traceable DC voltage standards with minimal thermal drift. IC Role / Device Role / Timing Role: Delivers 4.096V reference for high-resolution DACs generating calibrated test voltages. Use Value: ±0.06% initial accuracy and 7ppm/°C TC meet ANSI C12.1 Class 0.1 metering requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF43FH4096IDR | 4.096V, 0.05% initial accuracy, 3ppm/°C TC, 100µA supply current, SO-8 | Higher accuracy and lower drift but higher quiescent current; no shutdown function | Select when absolute long-term stability outweighs power budget constraints. |
| ADR444BRZ | 4.096V, 0.04% initial accuracy, 3ppm/°C TC, 750µA supply current, SO-8 | Superior TC and accuracy but 21× higher supply current; no shutdown | Choose for lab-grade instruments where power is not constrained and drift must be minimized. |
Compared with REF43FH4096IDR and ADR444BRZ, the LT1461BCS8-4#TRPBF trades 1–2ppm/°C higher temperature coefficient and 0.01–0.02% lower initial accuracy for 21× lower supply current and integrated shutdown-making it optimal for portable, battery-sensitive systems where moderate drift is acceptable.
Availability
LT1461BCS8-4#TRPBF is available at Aetrix Electronics and suitable for portable instrumentation, industrial process transmitters, and medical monitoring equipment requiring stable component supply with consistent lead times and full traceability.
Supply support for LT1461BCS8-4#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, Inc. is a global semiconductor leader specializing in high-performance analog, mixed-signal, and digital signal processing technologies.
The LT1461 family was designed for precision voltage referencing in low-power, high-accuracy measurement systems-emphasizing micropower operation, low dropout, and robust thermal performance across commercial temperature ranges.
FAQ
What is the maximum load current supported by the LT1461BCS8-4#TRPBF?
The LT1461BCS8-4#TRPBF guarantees minimum output current capability of 50mA under specified conditions (VIN = VOUT + 2.5V). It can deliver higher currents with increased input headroom, though thermal limits apply. The device includes thermal shutdown protection that activates near 150°C junction temperature to prevent damage during sustained overload.
Does the LT1461BCS8-4#TRPBF require external capacitors, and if so, what values?
Yes, the LT1461BCS8-4#TRPBF requires both input and output bypass capacitors. A minimum 1µF ceramic capacitor is recommended on VIN, and a minimum 2µF ceramic capacitor is required on VOUT for stability under full 50mA load. These values are validated in the datasheet's Typical Application circuits and transient response figures.
What is the operating temperature range for the LT1461BCS8-4#TRPBF?
The LT1461BCS8-4#TRPBF is specified for operation from 0°C to 70°C, as indicated by the "C" grade suffix in its part number. It remains functional across –40°C to 125°C per Absolute Maximum Ratings, but parametric performance (e.g., accuracy, drift) is only guaranteed within the 0°C to 70°C range.
How does the shutdown feature of the LT1461BCS8-4#TRPBF operate?
The LT1461BCS8-4#TRPBF enters shutdown when Pin 3 (SHDN) is pulled to ≤0.5V, reducing supply current to ≤35µA. It resumes normal operation within 200µs after SHDN rises to ≥2.4V. During shutdown, VOUT is disabled and high-impedance; the part retains ability to sink small currents via internal circuitry.
Is the LT1461BCS8-4#TRPBF compatible with lead-free reflow processes?
Yes, the LT1461BCS8-4#TRPBF carries the "#TRPBF" suffix, indicating RoHS-compliant, lead-free finish and packaging qualified for standard Pb-free reflow profiles (JEDEC J-STD-020). Its SO-8 package withstands peak temperatures up to 260°C for 10 seconds, matching IPC/JEDEC specifications for lead-free assembly.
LT1461BCS8-4#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):
- 4.096V
- 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:
- 4.596V ~ 20V
- Current - Supply:
- 70µA
- Current - Cathode:
- -
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SO
LT1461BCS8-4#TRPBF FAQ
1.How can I place an order for LT1461BCS8-4#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1461BCS8-4#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 LT1461BCS8-4#TRPBF reliable?
The price and inventory of LT1461BCS8-4#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1461BCS8-4#TRPBF is usually 5 days.
3.What payment methods are accepted for LT1461BCS8-4#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1461BCS8-4#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1461BCS8-4#TRPBF?
LT1461BCS8-4#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1461BCS8-4#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 LT1461BCS8-4#TRPBF?
For technical support, including LT1461BCS8-4#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1461BCS8-4#TRPBF requirements.
6.How does Aetrix verify that LT1461BCS8-4#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT1461BCS8-4#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 LT1461BCS8-4#TRPBF meets industry standards.
7.What is the process for return or replacement of LT1461BCS8-4#TRPBF?
All LT1461BCS8-4#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1461BCS8-4#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 LT1461BCS8-4#TRPBF part is unused and in its original packaging.
Return procedure for LT1461BCS8-4#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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