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Analog Devices Inc. LT1461CCS8-5#TRPBF
- Part No.:
- LT1461CCS8-5#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Voltage Reference
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LT1461CCS8-5#TRPBF.pdf
- Description:
- IC VREF SERIES 0.08% 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:5,676
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Product details
Overview
LT1461CCS8-5#TRPBF from Analog Devices is a 5V, low-dropout micropower precision voltage reference in an 8-lead SOIC package, featuring ±0.08% initial accuracy, 12ppm/°C max temperature coefficient, 35µA typical supply current, 50mA output drive, and <300mV dropout at 50mA - designed for high-accuracy analog signal chains in battery-powered instrumentation and precision regulators.
For engineers reviewing the LT1461CCS8-5#TRPBF datasheet, LT1461CCS8-5#TRPBF pinout, LT1461CCS8-5#TRPBF application, or LT1461CCS8-5#TRPBF equivalent, key selection criteria include its guaranteed 0°C to 70°C operation, shutdown functionality (Pin 3), thermal hysteresis performance (≤120ppm over –40°C to 125°C), and compatibility with 2µF output capacitance for stability under dynamic loads.
Technical Context
The LT1461CCS8-5#TRPBF implements curvature-compensated bandgap architecture with trimmed thin-film resistors to achieve low drift and high DC accuracy. Its internal shutdown control enables full-load switching with ≤35µA quiescent current in sleep mode, while thermal limiting protects against junction temperatures exceeding 150°C.
It operates with input voltages from (VOUT + 0.3V) to 20V, supports load currents up to 50mA with only 12ppm/mA load regulation, and maintains line regulation of ≤12ppm/V across its specified input range - making it suitable for precision ADC/DAC biasing where supply rejection and thermal stability are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 5.000V ±0.08% (±4mV) at 25°C - ensures stable reference for 14-bit+ data converters without calibration. |
| Tempco | 12ppm/°C max (0°C to 70°C) - limits drift to ±0.84mV over full commercial range, preserving system accuracy. |
| Supply Current | 35µA typ / 50µA max - enables multi-year battery life in portable measurement devices. |
| Dropout Voltage | ≤300mV at 50mA - allows operation from single Li-ion or two alkaline cells with full reference performance. |
| Output Drive | 50mA min sourcing capability - directly drives op-amp buffers, DAC references, or low-power regulators without external gain stages. |
| Shutdown Current | ≤35µA at RL = 1kΩ - enables ultra-low-power system sleep modes with fast wake-up (<200µs). |
| Noise (0.1–10Hz) | 8ppmP-P (≈40µV) - compatible with high-resolution 16-bit SAR and delta-sigma ADCs requiring clean reference rails. |
Pinout & Package
LT1461CCS8-5#TRPBF uses an 8-lead plastic SOIC (S8) package with exposed pad not connected. Pin 1 is top-left corner (notch-marked), and Pins 1, 2, 4, 5, 6, 7, and 8 are internally unused (DNC). Only Pins 3 (SHDN), 4 (GND), 6 (VOUT), and 8 (VIN) are functional.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 3 | Shutdown Control Input | Active-low logic interface: ≤0.5V disables output and reduces supply current to ≤35µA; ≥2.4V enables normal operation. |
| Pin 4 | Ground Reference | Low-impedance return path for reference core and output stage; must be tied to clean analog ground plane. |
| Pin 6 | Reference Output | Stable 5V source capable of sourcing 50mA; requires ≥2µF ceramic output capacitor for transient stability. |
| Pin 8 | Input Supply | Accepts 5.3V to 20V input; dropout as low as 300mV enables efficient use of marginal supply headroom. |
Key Features
| Feature | Design Value |
|---|---|
| Trimmed Thin-Film Resistors | Enable ±0.08% initial accuracy without external calibration - reduces BOM count and test time in production. |
| Curvature-Compensated Bandgap | Delivers 12ppm/°C max tempco over 0°C to 70°C - eliminates need for software temperature compensation in industrial sensors. |
| Integrated Thermal Shutdown | Activates at TJ ≈ 150°C to prevent damage during overload or poor heatsinking - avoids catastrophic failure in unattended systems. |
| Low-Noise Output Stage | 8ppmP-P (0.1–10Hz) noise floor - supports 16-bit+ resolution without degrading SNR in precision data acquisition. |
| High PSRR | ≥60dB ripple rejection up to 1kHz - rejects switching regulator noise without additional LC filtering in mixed-signal PCBs. |
Applications
| Portable Multimeter Front-End | Precision Industrial DAC Reference |
|---|---|
Use Scenario: Handheld digital multimeter measuring DC voltage with 0.01% basic accuracy and auto-ranging over 200mV–1000V ranges. IC Role / Device Role / Timing Role: Primary 5V reference for 24-bit delta-sigma ADC and internal scaling amplifiers. Use Value: ±0.08% initial accuracy and 12ppm/°C tempco ensure calibrated accuracy holds across operating temperature without field recalibration. | Use Scenario: 16-bit current-output DAC driving 4–20mA loop transmitters in programmable logic controller (PLC) analog output modules. IC Role / Device Role / Timing Role: Stable 5V reference for DAC VREF input and op-amp feedback networks in precision I/V conversion. Use Value: 50mA output drive directly powers DAC reference and buffer circuitry, eliminating discrete pass transistors and reducing layout sensitivity. |
| Battery-Powered Data Logger | Medical ECG Signal Chain Bias |
Use Scenario: Low-power environmental sensor node logging temperature, humidity, and pressure every 10 seconds using coin-cell battery (CR2032). IC Role / Device Role / Timing Role: Micropower 5V reference for rail-to-rail op-amps and SAR ADC sampling sensor signals. Use Value: 35µA supply current extends battery life beyond 5 years; shutdown mode reduces current to ≤35µA during sleep intervals. | Use Scenario: Portable electrocardiogram (ECG) monitor digitizing biopotential signals with >100dB common-mode rejection and <1µV RMS noise. IC Role / Device Role / Timing Role: Ultra-low-noise 5V reference for instrumentation amplifier biasing and ADC reference voltage. Use Value: 8ppmP-P (40µV) low-frequency noise prevents baseline wander and preserves ST-segment fidelity in diagnostic-grade waveforms. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADR4550BRZ | 5.0V output, ±0.02% initial accuracy, 3ppm/°C max tempco, 950µA supply current, SOIC-8 | Higher accuracy and lower drift, but 27× higher quiescent current - unsuitable for battery operation | Select when ultimate DC precision outweighs power budget; requires redesign for thermal management due to higher dissipation. |
| REF5050AIDR | 5.0V output, ±0.05% initial accuracy, 3ppm/°C max tempco, 950µA supply current, SOIC-8 | Lower tempco and better long-term stability, but no shutdown function and higher supply current | Prefer for mains-powered test equipment where drift and aging dominate error budgets; incompatible with low-power shutdown sequencing. |
Compared with ADR4550BRZ and REF5050AIDR, the LT1461CCS8-5#TRPBF trades absolute accuracy and ultra-low drift for micropower operation and integrated shutdown - enabling compact, long-life designs where 0.08% initial error and 12ppm/°C drift are acceptable within system-level calibration.
Availability
LT1461CCS8-5#TRPBF is available at Aetrix Electronics and suitable for portable instrumentation, precision industrial DACs, battery-powered data loggers, and medical biosignal conditioning requiring stable component supply with traceable lot history and RoHS-compliant packaging.
Supply support for LT1461CCS8-5#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, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, communications, automotive, and healthcare markets since 1965.
The LT1461 family was engineered for applications demanding high DC accuracy, low power, and robust thermal performance - particularly in portable test equipment, precision data acquisition, and regulated power subsystems where reference stability directly impacts measurement integrity.
FAQ
What is the maximum load current supported by the LT1461CCS8-5#TRPBF?
The LT1461CCS8-5#TRPBF guarantees ≥50mA output sourcing capability under specified conditions (VIN ≥ VOUT + 2.5V). It can deliver short-circuit current up to 100mA, but sustained operation above 50mA requires careful thermal design due to SOIC package limitations (θJA = 190°C/W). Derating is recommended above 25mA ambient >70°C.
Does the LT1461CCS8-5#TRPBF require external capacitors, and if so, what values?
Yes - the LT1461CCS8-5#TRPBF requires both input and output capacitors for stability. A minimum 1µF ceramic capacitor is needed on VIN (Pin 8), and ≥2µF ceramic is required on VOUT (Pin 6) for loads up to 50mA. The datasheet confirms 2µF output capacitance ensures stable transient response during 50mA load steps, as shown in Figure 2 of the application information section.
What is the operating temperature range for the LT1461CCS8-5#TRPBF?
The LT1461CCS8-5#TRPBF is specified for 0°C to 70°C operation (Commercial grade). This is confirmed in the ORDER INFORMATION table, where LT1461CCS8-5#TRPBF is explicitly listed with "0°C to 70°C" under Specified Temperature Range. Full functionality is guaranteed from –40°C to 125°C per Absolute Maximum Ratings, but parametric performance is only assured across the commercial range.
How does the shutdown feature of the LT1461CCS8-5#TRPBF behave electrically?
The shutdown pin (Pin 3) is active-low: logic low ≤0.5V places the LT1461CCS8-5#TRPBF in shutdown mode, reducing supply current to ≤35µA while disabling VOUT. Logic high ≥2.4V enables normal operation. Input current is ≤4µA at 0.8V and ≤15µA at 2.4V, allowing direct interfacing with CMOS logic or microcontroller GPIO without level-shifting.
Is the LT1461CCS8-5#TRPBF pin-compatible with other members of the LT1461 family?
Yes - all LT1461 variants in the S8 package (including LT1461ACS8-5#TRPBF, LT1461BCS8-5#TRPBF, and LT1461CCS8-5#TRPBF) share identical 8-lead SOIC pinouts and terminal assignments. Only Pins 3 (SHDN), 4 (GND), 6 (VOUT), and 8 (VIN) are functional; all others are DNC. This allows drop-in replacement across accuracy/tempco grades without PCB modification.
LT1461CCS8-5#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:
- ±0.08%
- Temperature Coefficient:
- 12ppm/°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
LT1461CCS8-5#TRPBF FAQ
1.How can I place an order for LT1461CCS8-5#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1461CCS8-5#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 LT1461CCS8-5#TRPBF reliable?
The price and inventory of LT1461CCS8-5#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1461CCS8-5#TRPBF is usually 5 days.
3.What payment methods are accepted for LT1461CCS8-5#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1461CCS8-5#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1461CCS8-5#TRPBF?
LT1461CCS8-5#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1461CCS8-5#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 LT1461CCS8-5#TRPBF?
For technical support, including LT1461CCS8-5#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1461CCS8-5#TRPBF requirements.
6.How does Aetrix verify that LT1461CCS8-5#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT1461CCS8-5#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 LT1461CCS8-5#TRPBF meets industry standards.
7.What is the process for return or replacement of LT1461CCS8-5#TRPBF?
All LT1461CCS8-5#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1461CCS8-5#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 LT1461CCS8-5#TRPBF part is unused and in its original packaging.
Return procedure for LT1461CCS8-5#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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