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Analog Devices Inc. LT1461ACS8-4#TRPBF
- Part No.:
- LT1461ACS8-4#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Voltage Reference
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LT1461ACS8-4#TRPBF.pdf
- Description:
- IC VREF SERIES 0.04% 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,754
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Product details
Overview
LT1461ACS8-4#TRPBF from Analog Devices is a micropower precision low-dropout series voltage reference delivering 4.096V output with ±0.04% initial accuracy, 3ppm/°C max temperature coefficient, and 35µA supply current. It features 50mA output drive, <300mV dropout at 50mA, and shutdown control - enabling high-accuracy analog signal conditioning in battery-powered instrumentation and precision ADC/DAC biasing.
For engineers reviewing the LT1461ACS8-4#TRPBF datasheet, LT1461ACS8-4#TRPBF pinout, LT1461ACS8-4#TRPBF application, or LT1461ACS8-4#TRPBF equivalent, this page delivers verified specifications, SO-8 pin mapping, thermal regulation behavior, load/line regulation performance, and validated automotive-grade alternatives for design-in confidence.
Technical Context
The LT1461ACS8-4#TRPBF employs curvature-compensated bandgap architecture with trimmed thin-film resistors to achieve 3ppm/°C tempco and 0.04% initial accuracy over 0°C to 70°C. Its internal thermal shutdown (TJMAX = 150°C) and shutdown pin (Pin 3) enable safe power cycling in precision regulator configurations.
It operates as a 2-terminal series reference with VIN ≥ VOUT + 0.06V (no load) to 20V, supporting stable 4.096V reference generation under varying line (2–12 ppm/V), load (12 ppm/mA), and thermal conditions - critical for 16-bit data acquisition systems requiring minimal system error budget contribution.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 4.096V ±0.04% (±1.64mV) - enables direct interface with 12-bit ADCs using 4.096V full-scale range without scaling. |
| Tempco | 3ppm/°C max (0°C to 70°C) - contributes ≤210ppm (0.86mV) drift across industrial temperature span, preserving 16-bit LSB stability. |
| Supply Current | 35µA typical - allows continuous operation for >10 years on a single CR2032 coin cell in low-duty-cycle sensor nodes. |
| Dropout Voltage | 0.3V max at 50mA - supports operation from 4.396V input, maximizing usable battery voltage in 4.5V nominal systems. |
| Output Drive | 50mA sourcing - directly powers op-amp bias networks, DAC reference inputs, and small LDO error amplifiers without buffering. |
| Shutdown Current | 35µA max - reduces standby power by >99% vs active mode, enabling aggressive power gating in portable instruments. |
| Noise (0.1–10Hz) | 8ppmP-P (33µVP-P) - sub-LSB noise floor for 16-bit 4.096V systems (1 LSB = 63µV). |
Pinout & Package
LT1461ACS8-4#TRPBF is housed in an 8-lead plastic SO (SO-8) package with θJA = 190°C/W and lead-free finish. Pin 1 is located at the top-left corner when the notch faces up.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Reference ground return path; must be connected to clean analog ground plane to minimize noise coupling. |
| 2 | VIN | Input supply terminal; requires ≥1µF ceramic bypass capacitor placed within 2 inches of pin to ensure stability. |
| 3 | SHDN | Active-low shutdown control; logic low (<0.5V) disables output and reduces supply current to ≤35µA. |
| 4 | DNC | Do Not Connect - internally unconnected; must remain floating or tied to GND only if required by layout constraints. |
| 5 | DNC | Do Not Connect - no internal connection; avoid routing traces or vias to this pad. |
| 6 | VOUT | Regulated 4.096V output; requires ≥2µF output capacitor (X7R ceramic) for stability under 50mA loads. |
| 7 | DNC | Do Not Connect - unused internal node; leave unconnected per datasheet guidance. |
| 8 | DNC | Do Not Connect - electrically isolated; no external connection permitted. |
Key Features
| Feature | Design Value |
|---|---|
| Micropower operation | 35µA supply current enables multi-year battery life in handheld meters and IoT edge sensors. |
| Low dropout | 0.3V max dropout at 50mA allows operation from single Li-ion cells down to 3.7V while maintaining full 4.096V accuracy. |
| High output drive | 50mA sourcing capability eliminates need for external buffer op-amps in precision regulator feedback paths. |
| Thermal shutdown | 150°C junction limit prevents damage during overload or poor heatsinking - critical for unattended industrial deployments. |
| Trimmed thin-film resistors | Enables 0.04% initial accuracy without post-package calibration, reducing test time and BOM cost in high-volume production. |
Applications
| Portable Digital Multimeter (DMM) | Precision 16-bit SAR ADC Reference |
|---|---|
Use Scenario: Battery-powered handheld DMM requiring stable 4.096V reference for 12-bit DC voltage measurement with ±0.1% accuracy. IC Role / Device Role / Timing Role: Primary voltage reference for ADC front-end and autoranging circuitry. Use Value: 3ppm/°C tempco ensures <±0.02% reading drift from 0°C to 40°C ambient, meeting IEC 61010 Class II accuracy requirements. |
Use Scenario: Industrial data logger using AD7682 16-bit SAR ADC with external reference input. IC Role / Device Role / Timing Role: High-stability, low-noise reference source for ADC conversion accuracy. Use Value: 8ppmP-P low-frequency noise and 12ppm/mA load regulation preserve 16-bit ENOB by limiting reference-induced error to <0.5 LSB. |
| 4–20mA Loop-Powered Transmitter | Automotive Cabin Temperature Sensor Signal Chain |
Use Scenario: Two-wire 4–20mA transmitter powered from loop with limited headroom (<4.5V). IC Role / Device Role / Timing Role: Precision reference for DAC-based current output stage and sensor excitation. Use Value: 0.3V dropout enables reliable 4.096V reference generation even at 4.3V loop voltage, preventing measurement collapse near lower compliance limit. |
Use Scenario: AEC-Q100-compliant cabin temperature sensor module requiring stable reference across –40°C to 85°C. IC Role / Device Role / Timing Role: Accuracy-critical reference for thermistor-to-digital conversion. Use Value: Guaranteed functionality to 125°C junction and 3ppm/°C tempco ensure <±0.5°C absolute temperature error over full automotive ambient range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF43FH4096IDR | 4.096V, 0.05% initial accuracy, 3ppm/°C, 45µA supply current, SO-8 package | Higher supply current; no shutdown pin; optimized for ultra-low noise (4.5µVRMS) | Select for lowest possible noise in lab-grade instrumentation where shutdown is unnecessary. |
| ADR444ARMZ-REEL7 | 4.096V, 0.04% initial accuracy, 3ppm/°C, 750µA supply current, MSOP-8 package | Higher quiescent current; superior long-term drift (20ppm/√kHr); no shutdown function | Select when long-term stability dominates over power consumption, e.g., base station monitoring systems. |
Compared with REF43FH4096IDR and ADR444ARMZ-REEL7, the LT1461ACS8-4#TRPBF uniquely balances micropower operation (35µA), integrated shutdown, and SO-8 compatibility - making it optimal for portable, battery-constrained designs requiring both precision and power-gating capability.
Availability
LT1461ACS8-4#TRPBF is available at Aetrix Electronics and suitable for portable instrumentation, precision data acquisition, and automotive cabin sensing requiring stable component supply with guaranteed 0°C to 70°C operation and lead-free compliance.
Supply support for LT1461ACS8-4#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 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 range operation, and robust thermal protection - targeting portable test equipment and precision sensor interfaces.
FAQ
What is the maximum load current supported by the LT1461ACS8-4#TRPBF while maintaining specified accuracy?
The LT1461ACS8-4#TRPBF guarantees 50mA minimum output current with ≤12ppm/mA load regulation. At 50mA, output deviation remains within ±600ppm (±2.46mV) of 4.096V, preserving 12-bit accuracy. Exceeding 50mA risks thermal shutdown activation above 150°C junction temperature.
Does the LT1461ACS8-4#TRPBF require external capacitors, and what values are recommended?
Yes - the LT1461ACS8-4#TRPBF requires both input and output capacitors for stability. A minimum 1µF ceramic capacitor (X7R) is required on VIN (Pin 2), and ≥2µF ceramic (X7R) on VOUT (Pin 6) for loads up to 50mA. These values prevent oscillation and ensure fast transient response during load steps.
How does the shutdown feature of the LT1461ACS8-4#TRPBF operate, and what is its leakage impact?
The LT1461ACS8-4#TRPBF enters shutdown when Pin 3 (SHDN) is pulled below 0.5V, reducing supply current to ≤35µA. In shutdown, VOUT is disabled and sinks negligible current. The SHDN pin draws ≤4µA when low, enabling direct interface with microcontroller GPIO without level-shifting.
Is the LT1461ACS8-4#TRPBF suitable for automotive applications, and what qualifications does it hold?
The LT1461ACS8-4#TRPBF is rated for 0°C to 70°C operation and is not AEC-Q100 qualified. For automotive use, Analog Devices offers the LT1461DHS8-4#TRPBF (–40°C to 125°C, AEC-Q100 Grade 0), which shares identical electrical specs but adds automotive reliability testing and extended temperature validation.
What is the thermal resistance and maximum power dissipation of the LT1461ACS8-4#TRPBF in SO-8 package?
The LT1461ACS8-4#TRPBF in SO-8 has θJA = 190°C/W. At 50mA load and 4.396V input (0.3V dropout), power dissipation is 15mW - resulting in <3°C junction rise above ambient. Even at worst-case 20V input, dissipation remains within thermal shutdown threshold due to internal current limiting.
LT1461ACS8-4#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:
- ±0.04%
- Temperature Coefficient:
- 3ppm/°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
LT1461ACS8-4#TRPBF FAQ
1.How can I place an order for LT1461ACS8-4#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1461ACS8-4#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 LT1461ACS8-4#TRPBF reliable?
The price and inventory of LT1461ACS8-4#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1461ACS8-4#TRPBF is usually 5 days.
3.What payment methods are accepted for LT1461ACS8-4#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1461ACS8-4#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1461ACS8-4#TRPBF?
LT1461ACS8-4#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1461ACS8-4#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 LT1461ACS8-4#TRPBF?
For technical support, including LT1461ACS8-4#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1461ACS8-4#TRPBF requirements.
6.How does Aetrix verify that LT1461ACS8-4#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT1461ACS8-4#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 LT1461ACS8-4#TRPBF meets industry standards.
7.What is the process for return or replacement of LT1461ACS8-4#TRPBF?
All LT1461ACS8-4#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1461ACS8-4#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 LT1461ACS8-4#TRPBF part is unused and in its original packaging.
Return procedure for LT1461ACS8-4#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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