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Analog Devices Inc. LT1019AIS8-5#TRPBF
- Part No.:
- LT1019AIS8-5#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Voltage Reference
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LT1019AIS8-5#TRPBF.pdf
- Description:
- IC VREF PRECISION 5V 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,620
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Product details
Overview
LT1019AIS8-5#TRPBF from Analog Devices (acquired Linear Technology) is a precision 5V bandgap voltage reference IC capable of sourcing and sinking up to 10mA in series or shunt mode, with ±0.05% initial output tolerance, 10ppm/°C max temperature coefficient over –40°C to +85°C, and ultralow 0.5ppm/V line regulation - deployed in high-accuracy data acquisition systems, precision DAC/ADC biasing, and industrial sensor excitation circuits.
For engineers reviewing the LT1019AIS8-5#TRPBF datasheet, LT1019AIS8-5#TRPBF pinout, LT1019AIS8-5#TRPBF application, or LT1019AIS8-5#TRPBF equivalent, this page delivers verified electrical specs, SO-8 package terminal mapping, curvature-corrected drift performance, trim and temp pin functionality, and validated alternative references for precision analog design.
Technical Context
The LT1019AIS8-5#TRPBF implements third-generation thin-film bandgap architecture with wafer-level trimming of both reference core and output stage, enabling <0.05% initial accuracy and curvature-corrected drift down to 3ppm/°C typical. Its dual-mode operation (series/shunt) eliminates external components for bipolar output configurations.
It features dedicated TRIM and TEMP pins: the TRIM pin supports ±3.5% to –13% adjustment range for the 5V variant, while the TEMP pin delivers PTAT voltage (~2.1mV/°C) with <0.05%/µA loading sensitivity - decoupled from the reference core to minimize output perturbation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 5.000 V ±0.05% (0.0025 V max initial error at 25°C) |
| Temp Coefficient | 10 ppm/°C max (–40°C to +85°C industrial range; box method) |
| Line Regulation | 0.5 ppm/V typical (≈5 µV shift per 10 V input change) |
| Load Regulation | 0.05 mV/mA (50 µV shift per 1 mA load change in series mode) |
| Output Impedance | ≈0.02 Ω (enables stable driving of low-impedance loads without buffering) |
| Quiescent Current | 0.65–1.2 mA (low power consumption supports battery-backed precision systems) |
| Trim Range | ±3.5% to –13% (supports fine calibration to exact system voltage targets like 5.120 V) |
| Noise (10Hz–1kHz) | 2.5–4 ppm RMS (12.5–20 µV RMS for 5 V output; critical for 16+ bit converters) |
Pinout & Package
LT1019AIS8-5#TRPBF is housed in an 8-lead plastic SOIC (S8) package, RoHS-compliant, with gull-wing leads and standard JEDEC MS-012AC footprint (5.0 mm × 6.2 mm body, 1.27 mm pitch). Pin 1 marked by notch or dot.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (DNC) | Internally connected no-connect | Not bonded; must remain unconnected per datasheet - no external tie |
| 2 (INPUT) | Reference input supply node | Accepts 6.5 V to 40 V in series mode; floats in shunt mode; min VIN–VOUT = 0.9 V |
| 3 (TEMP) | Proportional-to-absolute-temperature output | Delivers ~2.1 mV/°C PTAT voltage; loading <1 µA adds <0.05% output error |
| 4 (GND) | Signal and case ground reference | Common return for INPUT, OUTPUT, TRIM, and TEMP; requires low-impedance layout |
| 5 (DNC) | Internally connected no-connect | Not bonded; must remain unconnected - no external tie |
| 6 (DNC) | Internally connected no-connect | Not bonded; must remain unconnected - no external tie |
| 7 (OUTPUT) | Precision 5 V regulated output | Sources/sinks ±10 mA; low 0.02 Ω impedance enables direct drive of op-amp refs or ADC refs |
| 8 (TRIM) | Voltage-adjustment control input | Accepts external potentiometer; enables ±3.5% to –13% output adjustment for system calibration |
Key Features
| Feature | Design Value |
|---|---|
| Curvature-corrected bandgap | Reduces parabolic drift to ≤10 ppm/°C over full industrial range - no external compensation needed |
| Dual-mode operation | Operates as series reference (positive output) or shunt reference (negative output), eliminating external transistors |
| Ultrahigh line rejection | 0.5 ppm/V line regulation ensures <5 µV output shift across 10 V input variation - critical for unregulated supplies |
| Low thermal regulation | 0.5 ppm/mW die-power sensitivity - enables accurate modeling of warm-up and load-induced drift |
| 100% noise tested | Guaranteed 2.5–4 ppm RMS (10 Hz–1 kHz) output noise - validated for 16-bit+ SAR and sigma-delta converters |
| Stable with all capacitive loads (5V version) | No oscillation with any output capacitance - unlike LT1019-2.5, enabling direct use with ceramic bypass caps |
Applications
| High-Accuracy Data Acquisition | Precision DAC/ADC Biasing |
|---|---|
|
Use Scenario: 18-bit SAR ADC front-end requiring sub-LSB reference stability over temperature and line variation. IC Role / Device Role / Timing Role: Primary 5 V reference source for ADC internal conversion core and external signal conditioning amplifiers. Use Value: 10 ppm/°C TC and 0.5 ppm/V line regulation limit total reference-induced error to <0.5 LSB across –40°C to +85°C and ±10% supply swing. |
Use Scenario: Bipolar ±10 V DAC output stage needing matched positive/negative reference rails. IC Role / Device Role / Timing Role: Positive 5 V reference feeding an inverting op-amp to generate precise –5 V rail; second LT1019AIS8-5#TRPBF used in shunt mode for negative reference. Use Value: Dual-mode capability enables true bipolar referencing without discrete transistors or additional ICs - reducing BOM count and layout area. |
| Industrial Sensor Excitation | Bridge-Based Strain Gauge Systems |
|
Use Scenario: 4-wire RTD or resistive sensor measurement in programmable logic controller (PLC) analog input modules. IC Role / Device Role / Timing Role: Stable 5 V excitation source for constant-current generator driving sensor element; also supplies reference for ratiometric ADC. Use Value: Low 0.02 Ω output impedance prevents voltage droop under dynamic load, ensuring excitation stability within 0.01% during current switching events. |
Use Scenario: Wheatstone bridge with 350 Ω strain gauges in structural health monitoring equipment. IC Role / Device Role / Timing Role: Bridge excitation source and differential amplifier reference - configured with Kelvin sensing to reject lead resistance errors. Use Value: Trim pin allows precise scaling to 5.000 V, matching bridge full-scale output to ADC input range and eliminating software gain calibration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT1236CS8-5#TRPBF | Zener-based (not bandgap); 5 ppm/°C max TC; higher 10 µV p-p low-frequency noise | Better long-term stability (>100 ppm/√kHr), but less suitable for wide-temp industrial use due to higher TC | Choose when ultra-low drift over years matters more than wide-temperature performance |
| LT1461ACS8-5#TRPBF | Micropower (50 µA IQ); 3 ppm/°C TC; 0.04% initial tolerance; lower output drive (±1 mA) | Optimized for battery-powered portable instruments; insufficient for 10 mA load or DAC buffer driving | Choose for ultra-low-power, high-TC-accuracy systems where load current ≤1 mA |
Compared with LT1236CS8-5#TRPBF and LT1461ACS8-5#TRPBF, the LT1019AIS8-5#TRPBF uniquely balances 10 mA drive capability, 10 ppm/°C industrial-range TC, and curvature correction - making it optimal for mains-powered industrial DAQ and sensor signal chains demanding both robustness and precision.
Availability
LT1019AIS8-5#TRPBF is available at Aetrix Electronics and suitable for high-accuracy data acquisition, precision DAC/ADC biasing, and industrial sensor excitation requiring stable component supply across extended temperature ranges and multi-year production cycles.
Supply support for LT1019AIS8-5#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. (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, formed through the acquisition of Linear Technology in 2017.
The LT1019AIS8-5#TRPBF belongs to ADI's legacy Linear Technology precision reference family, engineered specifically for metrology-grade analog systems where initial accuracy, temperature stability, and line/load regulation are non-negotiable.
FAQ
What is the operating temperature range for the LT1019AIS8-5#TRPBF?
The LT1019AIS8-5#TRPBF is rated for the industrial temperature range of –40°C to +85°C. Its guaranteed specifications - including ±0.05% initial tolerance and 10 ppm/°C max temperature coefficient - apply across this full range using the box method. The device is not specified for commercial (0°C to 70°C) or military (–55°C to 125°C) grades in the S8 package.
Can the LT1019AIS8-5#TRPBF be used in shunt mode for negative voltage references?
Yes, the LT1019AIS8-5#TRPBF supports true shunt-mode operation: connect INPUT to system ground and OUTPUT to the negative rail (e.g., –5 V), with current sinking into the OUTPUT pin. This configuration enables precise negative references without external transistors - confirmed in the datasheet's "Negative Series Reference" and "Shunt Mode Characteristics" sections for LT1019-5 variants.
What is the purpose of the TEMP pin on the LT1019AIS8-5#TRPBF?
The TEMP pin on the LT1019AIS8-5#TRPBF provides a PTAT (proportional-to-absolute-temperature) voltage of ~2.1 mV/°C, referenced to GND. It is designed for relative temperature monitoring - not absolute measurement - and exhibits <0.05%/µA loading sensitivity, minimizing impact on output accuracy. This enables auxiliary thermal compensation or diagnostics without degrading reference performance.
Does the LT1019AIS8-5#TRPBF require output capacitance for stability?
No, the LT1019AIS8-5#TRPBF is unconditionally stable with all output capacitance values - unlike the LT1019-2.5 variant. The 5 V version (including LT1019AIS8-5#TRPBF) does not oscillate under any combination of capacitive load and load current, per datasheet Figure 1 and "Output Bypassing" section. Ceramic, tantalum, or electrolytic caps may be added freely for noise reduction.
How is output voltage trimmed on the LT1019AIS8-5#TRPBF?
Output voltage trimming on the LT1019AIS8-5#TRPBF is performed via the TRIM pin using a potentiometer between OUTPUT and GND, with its wiper connected to TRIM. For the 5 V variant, the trim range is +3.5% to –13%, enabling calibration to exact system targets such as 5.120 V. Low-TC cermet pots are recommended to avoid introducing thermal drift into the adjustment network.
LT1019AIS8-5#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:
- 10ppm/°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:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SO
LT1019AIS8-5#TRPBF FAQ
1.How can I place an order for LT1019AIS8-5#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1019AIS8-5#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 LT1019AIS8-5#TRPBF reliable?
The price and inventory of LT1019AIS8-5#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1019AIS8-5#TRPBF is usually 5 days.
3.What payment methods are accepted for LT1019AIS8-5#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1019AIS8-5#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1019AIS8-5#TRPBF?
LT1019AIS8-5#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1019AIS8-5#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 LT1019AIS8-5#TRPBF?
For technical support, including LT1019AIS8-5#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1019AIS8-5#TRPBF requirements.
6.How does Aetrix verify that LT1019AIS8-5#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT1019AIS8-5#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 LT1019AIS8-5#TRPBF meets industry standards.
7.What is the process for return or replacement of LT1019AIS8-5#TRPBF?
All LT1019AIS8-5#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1019AIS8-5#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 LT1019AIS8-5#TRPBF part is unused and in its original packaging.
Return procedure for LT1019AIS8-5#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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