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Analog Devices Inc. LT1019ACS8-5#TRPBF
- Part No.:
- LT1019ACS8-5#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Voltage Reference
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LT1019ACS8-5#TRPBF.pdf
- Description:
- IC VREF PRECISION 5V 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,287
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Product details
Overview
LT1019ACS8-5#TRPBF from Analog Devices (formerly Linear Technology) is a precision 5V bandgap voltage reference IC operating in series or shunt mode with ±0.05% initial output tolerance, 3ppm/°C typical temperature coefficient, and ultralow 0.5ppm/V line regulation. It sources/sinks up to 10mA and supports industrial temperature range (–40°C to +85°C) in SO-8 package for high-stability analog signal chains.
For engineers reviewing the LT1019ACS8-5#TRPBF datasheet, LT1019ACS8-5#TRPBF pinout, LT1019ACS8-5#TRPBF application, or LT1019ACS8-5#TRPBF equivalent, key selection criteria include tight TC over full industrial range, curvature-corrected drift performance, dual-mode operation without external components, and compatibility with legacy bandgap references in A/D converters and precision regulators.
Technical Context
The LT1019ACS8-5#TRPBF implements wafer-level trimmed thin-film curvature correction to achieve <5ppm/°C max TC across –40°C to +85°C and maintains <0.05% initial accuracy. Its dual-series/shunt topology enables both positive and negative output configurations without external circuitry.
It features 0.02Ω output impedance, 100% noise-tested 2.5ppm RMS (10Hz–1kHz), and thermal regulation of 0.5ppm/mW - critical for minimizing power-dissipation-induced drift in precision measurement systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 5.000V ±0.05% (guaranteed initial accuracy at 25°C) |
| Temp Coefficient | 3ppm/°C typical, ≤5ppm/°C max (–40°C to +85°C box method) |
| Line Regulation | 0.5ppm/V typical (enables stable output under ±10V input variation) |
| Load Regulation | 0.02mV/mA (0–10mA sourcing; ensures <200µV shift across full load) |
| Output Impedance | ≈0.02Ω (supports low-noise, high-PSRR analog front-ends) |
| Quiescent Current | 0.65–1.0mA (low power consumption without sacrificing stability) |
| Short-Circuit Duration | Indefinite below 20V input; 10 sec at 20–35V (robust fault handling) |
Pinout & Package
LT1019ACS8-5#TRPBF is housed in an 8-lead plastic SOIC (S8) package with standard JEDEC MS-012AC footprint (0.150" width). Pin 1 is marked with dot; pins 1–4 and 5–8 are on opposing sides. DNC pins are internally connected and must remain unconnected externally.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (DNC) | No-connect | Internally tied; external connection prohibited |
| 2 (INPUT) | Reference input node | Accepts input voltage ≥1.3V above output in series mode; floats in shunt mode |
| 3 (TEMP) | PTAT temperature monitor | Outputs ≈2.1mV/°C for relative temp sensing; loading <0.05%/µA avoids reference perturbation |
| 4 (GND) | Ground reference | Case ground terminal; serves as return for output current and trim network |
| 5 (DNC) | No-connect | Internally tied; external connection prohibited |
| 6 (DNC) | No-connect | Internally tied; external connection prohibited |
| 7 (OUTPUT) | Regulated 5V output | Sources/sinks up to 10mA; low-impedance node for ADC/DAC reference or regulator feedback |
| 8 (TRIM) | Voltage trim control | Accepts external potentiometer for ±3.5% to –13% adjustment of 5V output |
Key Features
| Feature | Design Value |
|---|---|
| Curvature-corrected bandgap | Reduces parabolic drift to ≤5ppm/°C over industrial range, eliminating need for external compensation |
| Dual-mode operation | Operates as series or shunt reference without external components - enables ±5V outputs and bridge excitation |
| Ultrahigh line rejection | 0.5ppm/V line regulation allows direct use with noisy or poorly regulated supplies in data acquisition systems |
| Low-output-impedance drive | 0.02Ω output impedance supports driving 10mA loads with <200µV droop - ideal for SAR ADC reference buffers |
| Trim-compatible legacy replacement | Direct plug-in substitute for AD580, REF-02, LM168, and MC1404 - preserves existing PCB layouts and calibration workflows |
Applications
| High-Precision Data Acquisition | Industrial Sensor Signal Conditioning |
|---|---|
|
Use Scenario: 16-bit SAR ADC system in programmable logic controller requiring sub-LSB error over –40°C to +85°C. IC Role / Device Role / Timing Role: Primary 5V reference for ADC VREF input and DAC feedback loop. Use Value: 3ppm/°C TC and 0.5ppm/V line regulation ensure <0.005% full-scale error contribution across temperature and supply variation. |
Use Scenario: Strain gauge Wheatstone bridge in load cell with ratiometric measurement. IC Role / Device Role / Timing Role: Excitation source and reference for instrumentation amplifier and ADC. Use Value: Dual-mode capability enables direct bridge biasing at 5V while maintaining identical reference potential - eliminates ratio errors from separate excitation/reference paths. |
| Precision Voltage Regulator Feedback | Calibration Equipment Reference |
|
Use Scenario: Low-drift 5V LDO used in metrology-grade power supply for op-amp test fixtures. IC Role / Device Role / Timing Role: Setpoint reference for error amplifier in closed-loop regulator. Use Value: 0.02Ω output impedance prevents gain error in feedback divider; ±0.05% initial tolerance reduces factory calibration burden. |
Use Scenario: Portable multimeter calibration module requiring traceable 5V reference with minimal warm-up drift. IC Role / Device Role / Timing Role: Master reference for internal DAC-based voltage generation and self-test. Use Value: 100% noise-tested 2.5ppm RMS noise and 0.5ppm/mW thermal regulation enable <10ppm total uncertainty after 1-hour stabilization. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT1027CS8-5#TRPBF | Zener-based, 0.5ppm/°C max TC, higher cost, no shunt mode | Better TC but lacks dual-mode flexibility; requires external current source in shunt config | Choose when ultra-low drift (<1ppm/°C) is mandatory and series-only operation suffices |
| LT1461ACS8-5#TRPBF | Bandgap, 3ppm/°C max TC, 50µA IQ, no TRIM pin, SO-8 | Lower power but no output adjustability; not drop-in for trim-dependent calibrations | Choose for battery-powered instruments where trim is unnecessary and quiescent current <100µA is critical |
Compared with LT1019ACS8-5#TRPBF, LT1027CS8-5#TRPBF delivers superior temperature stability but sacrifices shunt-mode operation and trim capability, while LT1461ACS8-5#TRPBF reduces power by 95% yet removes field calibration flexibility - making LT1019ACS8-5#TRPBF optimal for industrial systems needing robustness, adjustability, and proven legacy compatibility.
Availability
LT1019ACS8-5#TRPBF is available at Aetrix Electronics and suitable for high-precision data acquisition, industrial sensor conditioning, and calibration equipment requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LT1019ACS8-5#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 (via acquisition of Linear Technology) designs high-performance analog ICs for precision signal conditioning, power management, and data conversion.
The LT1019 product line delivers third-generation curvature-corrected bandgap references optimized for industrial and test equipment demanding low TC, tight initial tolerance, and dual-mode operational flexibility.
FAQ
What is the maximum load current supported by the LT1019ACS8-5#TRPBF in series mode?
The LT1019ACS8-5#TRPBF can source or sink up to 10mA continuously in either series or shunt mode. At 10mA load, minimum input/output differential remains 1.3V, enabling reliable operation with input voltages as low as 6.3V while maintaining 5V output regulation and <0.05% accuracy.
Does the LT1019ACS8-5#TRPBF require external capacitors for stability?
No - the LT1019ACS8-5#TRPBF is internally compensated and stable with all output capacitance values for 4.5V, 5V, and 10V versions. Unlike the 2.5V variant, the LT1019ACS8-5#TRPBF does not oscillate under any combination of load current and capacitor value, simplifying layout in precision analog systems.
How is the TEMP pin used on the LT1019ACS8-5#TRPBF, and what is its sensitivity?
The TEMP pin on the LT1019ACS8-5#TRPBF provides a PTAT voltage ≈2.1mV/°C (≈620mV at 25°C) for relative temperature monitoring. Loading this pin induces <0.05%/µA change in reference output, making it far less sensitive than prior bandgap references - suitable for buffered monitoring without degrading reference accuracy.
Can the LT1019ACS8-5#TRPBF be used as a negative shunt reference?
Yes - the LT1019ACS8-5#TRPBF supports negative shunt operation by connecting INPUT to system ground and OUTPUT to negative rail. In this configuration, it regulates –5V with same 0.05% initial tolerance and 5ppm/°C max TC, enabling precision bipolar signal chains without additional components.
What is the trim range for the LT1019ACS8-5#TRPBF, and how is it implemented?
The LT1019ACS8-5#TRPBF offers a nominal trim range of +3.5% to –13% around 5.000V, implemented via external potentiometer between OUTPUT and GND with wiper connected to TRIM pin. This wide range maintains compatibility with legacy references like REF-02 while allowing fine calibration in production test fixtures.
LT1019ACS8-5#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, Shunt
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 5V
- Voltage - Output (Max):
- -
- Current - Output:
- 10 mA
- Tolerance:
- ±0.05%
- Temperature Coefficient:
- 5ppm/°C
- Noise - 0.1Hz to 10Hz:
- 2.5ppmp-p
- Noise - 10Hz to 10kHz:
- 2.5ppmrms
- Voltage - Input:
- 6.5V ~ 40V
- Current - Supply:
- 1.3mA
- Current - Cathode:
- 800 µA
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SO
LT1019ACS8-5#TRPBF FAQ
1.How can I place an order for LT1019ACS8-5#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1019ACS8-5#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 LT1019ACS8-5#TRPBF reliable?
The price and inventory of LT1019ACS8-5#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1019ACS8-5#TRPBF is usually 5 days.
3.What payment methods are accepted for LT1019ACS8-5#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1019ACS8-5#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1019ACS8-5#TRPBF?
LT1019ACS8-5#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1019ACS8-5#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 LT1019ACS8-5#TRPBF?
For technical support, including LT1019ACS8-5#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1019ACS8-5#TRPBF requirements.
6.How does Aetrix verify that LT1019ACS8-5#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT1019ACS8-5#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 LT1019ACS8-5#TRPBF meets industry standards.
7.What is the process for return or replacement of LT1019ACS8-5#TRPBF?
All LT1019ACS8-5#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1019ACS8-5#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 LT1019ACS8-5#TRPBF part is unused and in its original packaging.
Return procedure for LT1019ACS8-5#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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