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Analog Devices Inc. LT1461CCS8-3.3#TRPBF
- Part No.:
- LT1461CCS8-3.3#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Voltage Reference
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LT1461CCS8-3.3#TRPBF.pdf
- Description:
- IC VREF SERIES 0.08% 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:5,937
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Product details
Overview
LT1461CCS8-3.3#TRPBF from Analog Devices is a micropower precision low-dropout series voltage reference delivering 3.3V output with ±0.08% initial accuracy, 12ppm/°C max temperature coefficient, 35µA supply current, <300mV dropout at 50mA, and shutdown control - used in high-resolution ADC/DAC biasing, portable instrumentation, and precision regulator feedback paths.
For engineers reviewing the LT1461CCS8-3.3#TRPBF datasheet, LT1461CCS8-3.3#TRPBF pinout, LT1461CCS8-3.3#TRPBF application, or LT1461CCS8-3.3#TRPBF equivalent, key selection criteria include guaranteed 0°C to 70°C operation, SO-8 package thermal performance, load regulation ≤30ppm/mA, and shutdown current ≤35µA - all critical for battery-powered and calibration-sensitive designs.
Technical Context
The LT1461CCS8-3.3#TRPBF implements curvature-compensated bandgap architecture with trimmed thin-film resistors for stable 3.3V output across temperature. Its internal thermal shutdown activates at ~150°C junction temperature, and the SHDN pin enables logic-controlled power gating with <4µA leakage at 0.8V input.
It operates as a two-terminal series reference (VIN–GND path) with active output drive capability up to 50mA, supporting direct use in precision regulator topologies without external pass devices. Line regulation is specified at 8ppm/V over 0.5V–20V input range, and output noise is 8ppmP-P (0.1Hz–10Hz).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.3V ±0.08% (±2.64mV) - ensures stable reference for 14-bit+ data converters without trimming |
| Tempco | 12ppm/°C max - limits drift to ±0.83mV over 0°C–70°C ambient range |
| Supply Current | 35µA typical - enables multi-year battery life in always-on sensor nodes |
| Dropout Voltage | ≤300mV at 50mA - allows operation from single-cell Li-ion (3.0V min) while maintaining full accuracy |
| Load Regulation | ≤30ppm/mA - contributes only ±1.5mV error across full 50mA output swing |
| Shutdown Current | ≤35µA - maintains ultra-low standby power without external switches |
| Output Noise | 8ppmP-P (0.1Hz–10Hz) - supports sub-16-bit resolution in low-frequency measurement systems |
Pinout & Package
LT1461CCS8-3.3#TRPBF uses an 8-lead plastic SO (SO-8) package with exposed pad not connected internally. Pin 1 is VIN, Pin 3 is SHDN, Pin 4 is GND, Pin 6 is VOUT; Pins 2, 5, 7, and 8 are DNC (do not connect) and must remain unconnected per datasheet.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | VIN | Main input supply terminal; accepts 3.6V–20V with ≥300mV headroom over VOUT |
| Pin 3 | SHDN | Active-low shutdown control; <0.5V disables output, >2.4V enables operation |
| Pin 4 | GND | Analog ground reference; must be low-impedance connection to minimize noise coupling |
| Pin 6 | VOUT | Regulated 3.3V output; capable of sourcing up to 50mA with <30ppm/mA load regulation |
| Pins 2,5,7,8 | DNC | No internal connection; must remain floating - soldering or routing causes parametric shift |
Key Features
| Feature | Design Value |
|---|---|
| Micropower operation | 35µA supply current enables >10-year battery life in 10µA sleep-cycle systems |
| Low dropout | 300mV max dropout at full 50mA load preserves usable voltage range in energy-constrained supplies |
| Trimmed thin-film resistors | Enable ±0.08% initial accuracy without external calibration in production test |
| Curvature compensation | Reduces temperature-induced nonlinearity to ≤12ppm/°C across commercial temp range |
| Thermal shutdown | Protects against sustained overload by limiting junction temperature to ~150°C |
Applications
| High-Resolution Data Acquisition | Portable Precision Instrumentation |
|---|---|
Use Scenario: 16-bit SAR ADC in handheld multimeter requiring stable reference under varying battery voltage and ambient temperature. IC Role / Device Role / Timing Role: Primary voltage reference for ADC internal conversion core and external analog front-end gain stages. Use Value: 12ppm/°C tempco and 30ppm/mA load regulation ensure <0.01% total error contribution across operating conditions. | Use Scenario: Battery-powered pH meter with auto-calibration routine requiring consistent 3.3V bias for electrode signal conditioning. IC Role / Device Role / Timing Role: Reference source for op-amp bias networks and microcontroller ADC reference input. Use Value: 35µA quiescent current extends alkaline battery life beyond 2 years; shutdown mode reduces standby draw to ≤35µA. |
| Precision Linear Regulator Feedback | Industrial Sensor Signal Chain |
Use Scenario: Low-noise 3.3V LDO for FPGA I/O banks where reference stability directly impacts digital timing margins. IC Role / Device Role / Timing Role: Setpoint generator for external PMOS pass transistor in adjustable LDO configuration. Use Value: 8ppmP-P low-frequency noise prevents jitter in clock recovery circuits downstream of regulated supply. | Use Scenario: 4–20mA transmitter with HART modulation requiring stable 3.3V rail for DAC and isolator ICs. IC Role / Device Role / Timing Role: Master reference for 12-bit DAC and isolated RS-485 transceiver biasing. Use Value: Guaranteed operation from 0°C to 70°C and 300mV dropout allow direct use from 5V system rail without intermediate regulators. |
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% initial accuracy, 50ppm/°C tempco, 4.5µA supply current, SOT-23-3 package | Lower power but higher drift; no shutdown pin; limited to ≤10mA output | Preferred for ultra-low-power sensor nodes where 50ppm/°C drift is acceptable and PCB space is constrained |
| ADR3433ARJZ-R7 | 3.3V, ±0.1% initial accuracy, 10ppm/°C tempco, 120µA supply current, SOT-23-5 package with enable | Higher supply current; tighter tempco than LT1461C grade but no thermal shutdown | Suitable when 10ppm/°C stability is prioritized over micropower and fault protection |
Compared with REF3333AIDBVR and ADR3433ARJZ-R7, the LT1461CCS8-3.3#TRPBF delivers superior initial accuracy (±0.08% vs ±0.1%), lower tempco than REF3333, integrated thermal shutdown, and 50mA drive - making it optimal for precision regulator and high-load ADC reference roles where robustness and accuracy outweigh minimal power savings.
Availability
LT1461CCS8-3.3#TRPBF is available at Aetrix Electronics and suitable for precision data acquisition, portable instrumentation, and industrial sensor signal chains requiring stable component supply with traceable lot-level documentation and long-term lifecycle support.
Supply support for LT1461CCS8-3.3#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.
The LT1461 family was designed specifically for micropower, high-accuracy voltage reference applications demanding low dropout, wide temperature stability, and robust output drive - targeting precision measurement, portable instrumentation, and calibration-critical systems.
FAQ
What is the maximum output current capability of the LT1461CCS8-3.3#TRPBF?
The LT1461CCS8-3.3#TRPBF provides a minimum output current of 50mA under specified conditions (VIN = VOUT + 2.5V). It can deliver up to 100mA short-circuit current, but sustained operation above 50mA requires careful thermal management due to SO-8 package limitations and thermal shutdown activation near 150°C junction temperature. The LT1461CCS8-3.3#TRPBF datasheet specifies 50mA as the rated continuous output.
Does the LT1461CCS8-3.3#TRPBF require external capacitors for stability?
Yes, the LT1461CCS8-3.3#TRPBF requires both input and output bypass capacitors. A minimum 1µF input capacitor (CIN) is needed for supply decoupling, and a minimum 2µF output capacitor (CL) is mandatory for frequency compensation and transient stability - especially at loads ≥1mA. Omitting CL risks oscillation and degraded load regulation. The LT1461CCS8-3.3#TRPBF application circuit explicitly specifies these values in its basic connection diagram.
What is the operating temperature range for the LT1461CCS8-3.3#TRPBF?
The LT1461CCS8-3.3#TRPBF is specified for commercial-grade operation from 0°C to 70°C. This is confirmed in the ORDER INFORMATION table, where "LT1461CCS8-3.3#TRPBF" is listed with "SPECIFIED TEMPERATURE RANGE: 0°C to 70°C". While the device remains functional from –40°C to 125°C per Absolute Maximum Ratings, parametric guarantees (accuracy, tempco, load regulation) apply only within the 0°C–70°C range for this C-grade variant.
How does the shutdown function work on the LT1461CCS8-3.3#TRPBF?
The LT1461CCS8-3.3#TRPBF shutdown pin (Pin 3) is active-low: pulling it below 0.5V disables the output and reduces supply current to ≤35µA, while leaving it open or driving it ≥2.4V enables normal operation. The shutdown feature allows full-load current switching and system-level power-down control. During shutdown, VOUT drops to near-GND, and turn-on time is approximately 200µs after SHDN rises above threshold. This behavior is documented in the Applications Information section of the LT1461CCS8-3.3#TRPBF datasheet.
Is the LT1461CCS8-3.3#TRPBF RoHS-compliant and lead-free?
Yes, the LT1461CCS8-3.3#TRPBF carries the "#TRPBF" suffix, which Analog Devices designates for lead-free, RoHS-compliant packaging with tape-and-reel delivery. The "PBF" element confirms Pb-free finish, and the part meets JEDEC J-STD-020 moisture sensitivity level 3 requirements. Full compliance documentation, including material declarations and test reports, is available through Analog Devices' official product page for LT1461CCS8-3.3#TRPBF.
LT1461CCS8-3.3#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:
- ±0.08%
- Temperature Coefficient:
- 12ppm/°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:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SO
LT1461CCS8-3.3#TRPBF FAQ
1.How can I place an order for LT1461CCS8-3.3#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1461CCS8-3.3#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 LT1461CCS8-3.3#TRPBF reliable?
The price and inventory of LT1461CCS8-3.3#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1461CCS8-3.3#TRPBF is usually 5 days.
3.What payment methods are accepted for LT1461CCS8-3.3#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1461CCS8-3.3#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1461CCS8-3.3#TRPBF?
LT1461CCS8-3.3#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1461CCS8-3.3#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 LT1461CCS8-3.3#TRPBF?
For technical support, including LT1461CCS8-3.3#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1461CCS8-3.3#TRPBF requirements.
6.How does Aetrix verify that LT1461CCS8-3.3#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT1461CCS8-3.3#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 LT1461CCS8-3.3#TRPBF meets industry standards.
7.What is the process for return or replacement of LT1461CCS8-3.3#TRPBF?
All LT1461CCS8-3.3#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1461CCS8-3.3#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 LT1461CCS8-3.3#TRPBF part is unused and in its original packaging.
Return procedure for LT1461CCS8-3.3#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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