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Analog Devices Inc. LT1461BCS8-3#TRPBF
- Part No.:
- LT1461BCS8-3#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Voltage Reference
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LT1461BCS8-3#TRPBF.pdf
- Description:
- IC VREF SERIES 0.06% 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,779
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Product details
Overview
LT1461BCS8-3#TRPBF from Analog Devices is a precision 3.0V low-dropout micropower series voltage reference in an 8-lead SOIC package, featuring ±0.06% initial accuracy, 7ppm/°C max temperature coefficient, 35µA typical supply current, 50mA output drive, and <300mV dropout at full load - deployed in high-resolution ADC/DAC biasing and portable precision regulators.
For engineers reviewing the LT1461BCS8-3#TRPBF datasheet, LT1461BCS8-3#TRPBF pinout, LT1461BCS8-3#TRPBF application, or LT1461BCS8-3#TRPBF equivalent, key selection criteria include guaranteed operation from –40°C to 85°C, shutdown control capability, thermal hysteresis performance under PCB stress, and compatibility with 2µF output capacitance for stable transient response.
Technical Context
The LT1461BCS8-3#TRPBF implements curvature-compensated bandgap architecture with trimmed thin-film resistors for precision, delivering 3.0V nominal output with monotonic temperature behavior across its specified industrial range. Its internal thermal shutdown activates at ~150°C junction temperature, and the SHDN pin enables logic-controlled output disable with sub-35µA quiescent current in shutdown mode.
It operates as a series reference requiring input voltage ≥ (VOUT + 0.5V), supports up to 50mA sourcing load, and maintains <12ppm/mA load regulation and <8ppm/V line regulation - enabling direct use in closed-loop precision regulator feedback paths without external buffering.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.0V ±0.06% (±1.8mV) - ensures ≤12-bit INL error contribution in 12-bit ADC systems without calibration |
| Tempco | 7ppm/°C max over –40°C to 85°C - limits drift to ≤525ppm (1.575mV) across full industrial range |
| Supply Current | 35µA typ / 50µA max - enables >1-year battery life in 10µA sleep-mode IoT sensor nodes |
| Dropout Voltage | ≤300mV at 50mA load - allows operation from 3.3V rail with ≥300mV headroom, maximizing battery utilization |
| Output Drive | 50mA min sourcing - directly drives op-amp reference inputs, DAC references, and small LDO error amplifiers |
| Shutdown Current | ≤35µA at RL = 1kΩ - reduces system standby power while preserving fast wake-up (<200µs turn-on) |
| Noise (0.1–10Hz) | 8ppmP-P (24µV P-P at 3V) - suitable for 16-bit SAR ADCs with <1LSB noise floor requirement |
Pinout & Package
LT1461BCS8-3#TRPBF uses an 8-lead plastic SOIC (SO-8) package with standard JEDEC MS-012AC outline, 190°C/W θJA, and lead-free finish. Pin 1 is located at the top-left corner with notch or dot marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Reference ground return - must connect to quiet analog ground plane with low-impedance path |
| 2 | VIN | Input supply - requires ≥3.3V minimum; bypassed with ≥1µF ceramic capacitor near pin |
| 3 | SHDN | Active-low shutdown control - <0.5V disables output; ≥2.4V enables normal operation |
| 4–5, 7–8 | DNC | Do Not Connect - internally unused; must remain floating or grounded per layout guidelines |
| 6 | VOUT | Precision 3.0V output - requires ≥2µF ceramic output capacitor for stability under 50mA loads |
Key Features
| Feature | Design Value |
|---|---|
| Curvature-compensated bandgap | Enables 7ppm/°C tempco without external trimming, reducing calibration overhead in production test |
| Trimmed thin-film resistors | Delivers ±0.06% initial accuracy - eliminates need for post-package laser trimming in most applications |
| Thermal shutdown protection | Activates at ~150°C TJ to prevent damage during overload or poor heatsinking - critical for unattended embedded systems |
| Logic-compatible shutdown | Accepts standard 3.3V/5V CMOS logic levels on SHDN pin - simplifies interface with microcontrollers and FPGAs |
| High PSRR (≥60dB @ 1kHz) | Rejects switching regulator ripple and digital noise - enables clean reference in mixed-signal SoM designs |
Applications
| Portable Data Acquisition | Precision Industrial Sensor Transmitters |
|---|---|
Use Scenario: Battery-powered handheld multimeter sampling 16-bit sigma-delta ADC with auto-ranging. IC Role / Device Role / Timing Role: Provides stable 3.0V reference for ADC conversion and internal DAC-based offset correction. Use Value: 35µA supply current extends 2xAA battery life beyond 18 months; 50mA drive supports simultaneous biasing of ADC, PGA, and analog front-end. | Use Scenario: 4–20mA loop-powered pressure transmitter operating in harsh factory environments. IC Role / Device Role / Timing Role: Supplies precise 3.0V reference to bridge sensor signal conditioning and 12-bit DAC for current loop modulation. Use Value: –40°C to 85°C guaranteed operation ensures reliability across ambient extremes; thermal hysteresis <75ppm prevents calibration drift after thermal cycling. |
| Medical Point-of-Care Glucose Meter | Automotive Cabin Air Quality Sensor Module |
Use Scenario: CE-certified glucose meter using amperometric biosensor with low-power MCU and display. IC Role / Device Role / Timing Role: Serves as excitation reference for transimpedance amplifier and ADC reference in dual-slope conversion. Use Value: 8ppmP-P low-frequency noise ensures <1mg/dL measurement resolution; shutdown mode reduces idle current to <35µA between tests. | Use Scenario: AEC-Q200-compliant CO₂ and VOC sensor module mounted near HVAC ducts in vehicle cabin. IC Role / Device Role / Timing Role: Provides regulated 3.0V supply and reference for NDIR optical detector and analog signal chain. Use Value: AEC-Q100 qualification (via LT1461DHS8 family) validates robustness; 7ppm/°C tempco meets automotive grade accuracy requirements over –40°C to 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 max tempco, 50µA supply current, SOT-23-3 package | Limited to 25mA output; no shutdown pin; smaller footprint but higher drift and lower accuracy | Select when board space is constrained and ±0.2% accuracy suffices; avoid in high-precision metrology or wide-temp industrial use |
| ADR3430ARJZ-R7 | 3.0V, ±0.1% initial accuracy, 10ppm/°C max tempco, 120µA supply current, SOT-23-5 package with enable | Higher quiescent current; no thermal shutdown; requires external bypass cap for stability | Prefer where tighter initial tolerance than REF3030 is needed but thermal protection is not critical; verify layout for noise sensitivity |
Compared with REF3030AIDBZR and ADR3430ARJZ-R7, the LT1461BCS8-3#TRPBF delivers superior accuracy (±0.06% vs ≥±0.1%), lower tempco (7ppm/°C vs ≥10ppm/°C), integrated thermal shutdown, and higher output drive - making it optimal for industrial and portable instrumentation where long-term stability and fault resilience are mandatory.
Availability
LT1461BCS8-3#TRPBF is available at Aetrix Electronics and suitable for portable instrumentation, industrial sensor transmitters, and medical point-of-care devices requiring stable component supply with guaranteed –40°C to 85°C operation and AEC-Q100-aligned reliability.
Supply support for LT1461BCS8-3#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 precision instrumentation, industrial automation, and communications markets.
The LT1461 family was designed for applications demanding micropower operation without sacrificing precision - targeting battery-powered test equipment, portable medical devices, and high-accuracy sensor signal chains where low dropout, low drift, and robust thermal behavior are essential.
FAQ
What is the maximum load current supported by the LT1461BCS8-3#TRPBF?
The LT1461BCS8-3#TRPBF supports a minimum output current of 50mA while maintaining specified accuracy and regulation. It can deliver up to 100mA short-circuit current, but sustained operation above 50mA may increase self-heating and affect long-term drift and thermal hysteresis. For continuous 50mA loads, ensure adequate PCB copper area and consider thermal derating above 85°C ambient.
Does the LT1461BCS8-3#TRPBF require external capacitors, and if so, what values?
Yes, the LT1461BCS8-3#TRPBF requires both input and output capacitors for stability. A minimum 1µF ceramic capacitor is required on VIN (pin 2), and a minimum 2µF ceramic capacitor on VOUT (pin 6) is mandatory for loads ≥1mA. These capacitors must be placed within 5mm of their respective pins using X7R or C0G dielectrics; omitting or undersizing them risks oscillation and degraded load transient response.
How does the shutdown function operate on the LT1461BCS8-3#TRPBF?
The LT1461BCS8-3#TRPBF shutdown pin (pin 3) is active-low: pulling it below 0.5V disables the output and reduces supply current to ≤35µA, while driving it ≥2.4V enables normal operation. The part powers up in approximately 200µs after SHDN rises above threshold. No external pull-up is required - the pin has internal bias, but a 100kΩ pull-up is recommended for noise immunity in noisy environments.
What is the thermal hysteresis specification for the LT1461BCS8-3#TRPBF?
The LT1461BCS8-3#TRPBF exhibits ≤75ppm thermal hysteresis over the –40°C to 85°C cycle, measured as output voltage deviation after returning to 25°C. This value reflects worst-case behavior for parts soldered onto PCBs; socketed parts show lower hysteresis. Layout techniques such as corner mounting and board slotting around the SO-8 package reduce hysteresis impact in high-accuracy systems.
Is the LT1461BCS8-3#TRPBF qualified for automotive applications?
The LT1461BCS8-3#TRPBF itself is rated for –40°C to 85°C operation and is not AEC-Q100 qualified. However, the pin-compatible LT1461DHS8-3#TRPBF variant is AEC-Q100 Grade 0 qualified (–40°C to 125°C) and supports automotive use. For automotive designs, specify the D-grade part; the B-grade LT1461BCS8-3#TRPBF is intended for industrial and portable instrumentation only.
LT1461BCS8-3#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:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SO
LT1461BCS8-3#TRPBF FAQ
1.How can I place an order for LT1461BCS8-3#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1461BCS8-3#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 LT1461BCS8-3#TRPBF reliable?
The price and inventory of LT1461BCS8-3#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1461BCS8-3#TRPBF is usually 5 days.
3.What payment methods are accepted for LT1461BCS8-3#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1461BCS8-3#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1461BCS8-3#TRPBF?
LT1461BCS8-3#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1461BCS8-3#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 LT1461BCS8-3#TRPBF?
For technical support, including LT1461BCS8-3#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1461BCS8-3#TRPBF requirements.
6.How does Aetrix verify that LT1461BCS8-3#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT1461BCS8-3#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 LT1461BCS8-3#TRPBF meets industry standards.
7.What is the process for return or replacement of LT1461BCS8-3#TRPBF?
All LT1461BCS8-3#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1461BCS8-3#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 LT1461BCS8-3#TRPBF part is unused and in its original packaging.
Return procedure for LT1461BCS8-3#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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