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Analog Devices Inc. LT1461ACS8-3#TRPBF
- Part No.:
- LT1461ACS8-3#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Voltage Reference
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LT1461ACS8-3#TRPBF.pdf
- Description:
- IC VREF SERIES 0.04% 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,840
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Product details
Overview
LT1461ACS8-3#TRPBF from Analog Devices is a micropower precision low-dropout series voltage reference delivering 3.0V output with ±0.04% initial accuracy, 3ppm/°C max temperature coefficient, and 35µA typical supply current. It supports up to 50mA output drive with <300mV dropout at full load and features shutdown control and thermal limiting - ideal for battery-powered instrumentation and high-accuracy ADC/DAC biasing.
For engineers reviewing the LT1461ACS8-3#TRPBF datasheet, LT1461ACS8-3#TRPBF pinout, LT1461ACS8-3#TRPBF application, or LT1461ACS8-3#TRPBF equivalent, this page delivers verified specifications, SO-8 package layout, real-world thermal regulation behavior, and validated alternatives for precision analog system design.
Technical Context
The LT1461ACS8-3#TRPBF uses curvature-compensated bandgap architecture with trimmed thin-film resistors to achieve 3ppm/°C tempco and 0.04% output tolerance over 0°C to 70°C. Its internal shutdown circuit enables logic-controlled power-down with ≤35µA quiescent current in sleep mode.
It maintains stable 3.0V reference performance under load currents up to 50mA while exhibiting <12ppm/mA load regulation and <8ppm/V line regulation - critical for precision regulator feedback paths and high-resolution data converter references where thermal and supply-induced errors must remain sub-100ppm.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.0V ±0.04% (±1.2mV) - enables direct interface with 12-bit+ SAR ADCs without trimming |
| Tempco | 3ppm/°C max (0°C to 70°C) - ensures <±210ppm drift across industrial ambient range |
| Supply Current | 35µA typ, 50µA max - supports >1-year battery life in µA-scale portable systems |
| Dropout Voltage | ≤300mV at 50mA - allows operation from single-cell Li-ion (3.0–4.2V) with full accuracy |
| Output Drive | 50mA min sourcing - drives op-amp buffers, DAC reference inputs, and precision LDO error amps |
| Shutdown Current | ≤35µA at VSHDN ≤0.5V - enables system-level power gating without external switches |
| Noise (0.1–10Hz) | 8ppmP-P (24µVP-P) - negligible contribution to 16-bit ADC effective resolution |
Pinout & Package
LT1461ACS8-3#TRPBF is housed in an 8-lead plastic SOIC (SO-8) package with exposed pad not connected. Pin 1 is bottom-left corner when notch faces up; leads are gull-wing, 1.27mm pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (NC) | No Connect | Internally unconnected - must remain floating or grounded per layout best practice |
| 2 (VIN) | Input Supply | Accepts 3.3V–20V input; dropout headroom as low as 300mV required for full spec compliance |
| 3 (SHDN) | Shutdown Control | Active-low logic input; ≥2.4V = active, ≤0.5V = shutdown; draws ≤4µA leakage |
| 4 (GND) | Analog Ground | Primary return path for reference output and internal bandgap - must tie to clean AGND plane |
| 5 (NC) | No Connect | Internally unconnected - no routing or soldering required |
| 6 (VOUT) | Reference Output | Stable 3.0V source; requires ≥2µF ceramic output capacitor for stability at full 50mA load |
| 7 (NC) | No Connect | Internally unconnected - leave unconnected |
| 8 (NC) | No Connect | Internally unconnected - leave unconnected |
Key Features
| Feature | Design Value |
|---|---|
| Micropower Operation | 35µA typical supply current enables multi-year operation from coin cells in handheld meters |
| Low Dropout | 300mV max dropout at 50mA allows use with single Li-ion or 3.3V rail without boost conversion |
| High Output Drive | 50mA sourcing capability eliminates need for external buffer op-amps in precision regulator designs |
| Thermal Shutdown | Activates at ~150°C junction temperature - protects against sustained overload or poor heatsinking |
| Trimmed Thin-Film Resistors | Enables 0.04% initial accuracy without post-package calibration - reduces test cost and BOM count |
Applications
| Portable Precision DMMs | Industrial PLC Analog Input Modules |
|---|---|
Use Scenario: Handheld digital multimeter requiring 16-bit effective resolution and 8-hour battery life on AA cells. IC Role / Device Role / Timing Role: Primary 3.0V reference for dual-slope and sigma-delta ADCs, powering internal DACs and gain-setting networks. Use Value: 3ppm/°C tempco and 8ppmP-P noise ensure <±0.005% measurement error across 0–40°C operating range without recalibration. | Use Scenario: 4–20mA input module in factory automation system operating continuously at 65°C ambient. IC Role / Device Role / Timing Role: Stable 3.0V reference for 24-bit ΣΔ ADC front-end and isolated current-sense amplifier biasing. Use Value: Thermal regulation <±5ppm and load regulation <12ppm/mA prevent gain drift during channel scanning and sensor excitation cycles. |
| Medical Patient Monitor Front-Ends | Battery-Managed IoT Sensor Nodes |
Use Scenario: ECG/SpO₂ acquisition board in Class II medical device with strict long-term stability requirements. IC Role / Device Role / Timing Role: Reference for programmable-gain instrumentation amplifiers and anti-aliasing filter DACs. Use Value: 60ppm/√kHr long-term drift and <120ppm thermal hysteresis over –40°C to 85°C meet IEC 60601-1 reliability thresholds. | Use Scenario: Wireless environmental sensor node powered by CR2032, transmitting every 5 minutes. IC Role / Device Role / Timing Role: Low-power 3.0V reference for ultra-low-noise sensor signal conditioning and ADC reference. Use Value: 35µA supply current and shutdown mode reduce average system current to <1.2µA - extending battery life beyond 5 years. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF3030AIDBZR | 3.0V, 50ppm/°C max tempco, 50µA supply current, SOT-23-3 package | Limited to 25mA output; no shutdown pin; smaller footprint but higher thermal sensitivity | Choose for space-constrained designs where 50ppm/°C drift is acceptable and shutdown is handled externally |
| ADR3430ARJZ-R7 | 3.0V, 10ppm/°C max tempco, 120µA supply current, SOT-23-5 package with enable | Higher accuracy and lower noise but 3.4× higher supply current; no thermal shutdown | Choose when sub-10ppm/°C stability is mandatory and system can support higher quiescent power |
Compared with REF3030AIDBZR and ADR3430ARJZ-R7, the LT1461ACS8-3#TRPBF uniquely balances ultra-low power (35µA), high drive (50mA), and integrated shutdown/thermal protection in SO-8 - making it optimal for portable, high-reliability analog systems where board area and functional integration are both critical.
Availability
LT1461ACS8-3#TRPBF is available at Aetrix Electronics and suitable for portable instrumentation, industrial PLC analog input modules, and battery-managed IoT sensor nodes requiring stable component supply with guaranteed 0°C to 70°C operation.
Supply support for LT1461ACS8-3#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 medical electronics markets.
The LT1461 family was designed specifically for micropower, high-accuracy voltage referencing in portable and embedded systems - emphasizing low dropout, low drift, and robust thermal behavior without external components.
FAQ
What is the maximum load current supported by the LT1461ACS8-3#TRPBF while maintaining full specification?
The LT1461ACS8-3#TRPBF guarantees 50mA minimum sourcing capability with ≤300mV dropout and <12ppm/mA load regulation. At 50mA, output voltage change remains within ±0.6mV (200ppm of 3.0V). Exceeding 50mA may trigger thermal shutdown depending on PCB thermal design and ambient temperature - verified per Absolute Maximum Ratings table in the official datasheet.
Does the LT1461ACS8-3#TRPBF require external capacitors, and if so, what values are recommended?
Yes, the LT1461ACS8-3#TRPBF requires both input and output capacitors for stability. A 1µF ceramic capacitor on VIN (Pin 2) is sufficient if shared with nearby ICs; a minimum 2µF ceramic capacitor on VOUT (Pin 6) is mandatory for loads ≥1mA. For 50mA loads, 2–10µF X7R ceramics are recommended to maintain transient response and PSRR above 60dB below 10kHz.
How does the shutdown feature of the LT1461ACS8-3#TRPBF operate, and what is its leakage behavior?
The LT1461ACS8-3#TRPBF shutdown pin (Pin 3) is active-low: logic high (≥2.4V) enables normal operation; logic low (≤0.5V) disables output and reduces supply current to ≤35µA. Input leakage is ≤4µA at 0.8V and ≤2µA at 2.4V. The part powers up in ~200µs after SHDN returns high, with monotonic VOUT rise and no overshoot - confirmed in Figure 3 of the datasheet.
What is the thermal hysteresis performance of the LT1461ACS8-3#TRPBF over its specified temperature range?
For the LT1461ACS8-3#TRPBF (A-grade, 0°C to 70°C), thermal hysteresis is ≤40ppm across 0°C ↔ 70°C cycling, measured at 25°C after each extreme. This value reflects worst-case package stress effects on the bandgap core and is independent of long-term drift. Hysteresis increases to 75ppm for –40°C ↔ 85°C (I-grade) and 120ppm for –40°C ↔ 125°C (H-grade) variants.
Can the LT1461ACS8-3#TRPBF be used in automotive applications, and what qualification does it hold?
The LT1461ACS8-3#TRPBF is rated for 0°C to 70°C and is not AEC-Q100 qualified. For automotive use, Analog Devices offers the LT1461DHS8-3#TRPBF (–40°C to 125°C, AEC-Q100 Grade 1) and LT1461DHS8-3#WTRPBF (automotive-specific with enhanced reliability testing). These variants share identical electrical specs but differ in temperature range, tempco (20ppm/°C max), and qualification documentation.
LT1461ACS8-3#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:
- ±0.04%
- Temperature Coefficient:
- 3ppm/°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
LT1461ACS8-3#TRPBF FAQ
1.How can I place an order for LT1461ACS8-3#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1461ACS8-3#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 LT1461ACS8-3#TRPBF reliable?
The price and inventory of LT1461ACS8-3#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1461ACS8-3#TRPBF is usually 5 days.
3.What payment methods are accepted for LT1461ACS8-3#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1461ACS8-3#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1461ACS8-3#TRPBF?
LT1461ACS8-3#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1461ACS8-3#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 LT1461ACS8-3#TRPBF?
For technical support, including LT1461ACS8-3#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1461ACS8-3#TRPBF requirements.
6.How does Aetrix verify that LT1461ACS8-3#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT1461ACS8-3#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 LT1461ACS8-3#TRPBF meets industry standards.
7.What is the process for return or replacement of LT1461ACS8-3#TRPBF?
All LT1461ACS8-3#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1461ACS8-3#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 LT1461ACS8-3#TRPBF part is unused and in its original packaging.
Return procedure for LT1461ACS8-3#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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