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Analog Devices Inc. LT1019IS8-5#TRPBF
- Part No.:
- LT1019IS8-5#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Voltage Reference
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LT1019IS8-5#TRPBF.pdf
- Description:
- IC VREF PRECISION 5V 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,284
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Product details
Overview
LT1019IS8-5#TRPBF from Analog Devices (acquired Linear Technology) is a precision 5V bandgap voltage reference IC operating in series or shunt mode with ±3.5% to –13% output trim range, 10ppm/°C max temperature coefficient over –40°C to 85°C, and ultralow 0.5ppm/V line regulation - used in high-accuracy ADC/DAC biasing, precision regulators, and bridge excitation circuits.
For engineers reviewing the LT1019IS8-5#TRPBF datasheet, LT1019IS8-5#TRPBF pinout, LT1019IS8-5#TRPBF application, or LT1019IS8-5#TRPBF equivalent, this page delivers verified specifications, industrial-grade package mapping (SO-8), real-world thermal regulation data (0.5ppm/mW), and two validated alternative references for design-in decisions.
Technical Context
The LT1019IS8-5#TRPBF employs wafer-level thin-film trimming for both reference and output voltage, enabling <0.05% initial tolerance and curvature-corrected drift performance. Its dual-mode operation (sourcing/sinking up to 10mA) eliminates external components for positive/negative output configurations.
It features a dedicated TEMP pin delivering PTAT voltage (~2.1mV/°C) with <0.05%/µA loading sensitivity, and a TRIM pin supporting wide-range adjustment without degrading TC - critical for calibration-critical instrumentation and metrology systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 5.000 V ±0.05% initial tolerance - enables direct replacement of REF-02, AD581, LM168 in 5V reference designs. |
| Temp Coefficient | 10 ppm/°C max (–40°C to 85°C) - ensures ≤0.5 mV drift across full industrial range. |
| Line Regulation | 0.5 ppm/V typical - rejects input ripple better than 110 dB up to 400 Hz, critical for noisy supply environments. |
| Output Impedance | ≈0.02 Ω - maintains stable voltage under dynamic load steps up to 10 mA without external buffering. |
| Quiescent Current | 1.0 mA typical - balances low power consumption with fast settling and low noise performance. |
| Trim Range | +3.5% / –13% for LT1019-5 - supports factory calibration to exact system voltage targets like 5.120 V for 12-bit DACs. |
| Noise (0.1–10 Hz) | 2.5 ppm P-P - minimizes low-frequency errors in precision weigh scales and strain gauge interfaces. |
Pinout & Package
LT1019IS8-5#TRPBF is housed in an 8-lead plastic SOIC (S8) package with gull-wing leads, JEDEC MS-012 compliant, 150°C max junction temperature, and 150°C/W θJA.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (DNC) | No-connect internal | Internally tied; must remain unconnected per datasheet - prevents parasitic coupling or latch-up. |
| 2 (INPUT) | Reference input node | Accepts 6V to 40V supply in series mode; floats in shunt mode - enables bidirectional configuration flexibility. |
| 3 (TEMP) | PTAT temperature monitor | Outputs ~2.1 mV/°C; loading <1 µA adds <0.05% error - usable for thermal compensation without reference degradation. |
| 4 (GND) | Ground reference | Case ground connection; Kelvin-sense point for load regulation measurement - critical for sub-mV accuracy. |
| 5 (DNC) | No-connect internal | Internally tied; no external connection permitted - avoids unintended feedback paths. |
| 6 (DNC) | No-connect internal | Internally tied; must be left floating - preserves internal curvature correction integrity. |
| 7 (OUTPUT) | Regulated 5V output | Sources/sinks ±10 mA; low-Z output drives ADC reference inputs directly without buffer op-amps. |
| 8 (TRIM) | Voltage trim control | Adjusts output ±3.5% to –13%; compatible with standard potentiometer networks for system-level calibration. |
Key Features
| Feature | Design Value |
|---|---|
| Curvature-corrected bandgap | Reduces parabolic drift to ≤10 ppm/°C box specification - outperforms standard bandgaps by >2× over full industrial range. |
| Series/shunt dual-mode operation | Eliminates need for external pass transistors or shunt resistors - simplifies PCB layout for ±5V reference generation. |
| Ultrahigh line rejection (≈0.5 ppm/V) | Enables direct use after switching regulators without LC filtering - reduces BOM count in portable instrumentation. |
| 100% noise tested | Guarantees ≤4 ppm RMS (10 Hz–1 kHz) and ≤2.5 ppm P-P (0.1–10 Hz) - meets metrology-grade signal chain requirements. |
| Industrial temperature range (–40°C to 85°C) | Validated performance across full range with 10 ppm/°C TC - suitable for outdoor sensors and motor control enclosures. |
Applications
| High-Accuracy Data Acquisition | Precision Bridge Excitation |
|---|---|
Use Scenario: 16-bit SAR ADC front-end requiring stable 5V reference for ±0.005% full-scale accuracy. IC Role / Device Role / Timing Role: Primary voltage reference source for ADC VREF pin, directly sourcing 1mA while rejecting supply ripple. Use Value: 0.5 ppm/V line regulation and 10 ppm/°C TC ensure <±0.8 LSB error contribution over temperature and line variation. |
Use Scenario: Wheatstone bridge in load cell interface where excitation stability dictates measurement resolution. IC Role / Device Role / Timing Role: Low-noise, low-drift 5V excitation source sinking 5mA into bridge arms with Kelvin sensing. Use Value: 2.5 ppm P-P (0.1–10 Hz) noise and <0.05% initial tolerance enable <10 ppm bridge output resolution. |
| Precision Regulator Feedback | Calibrated DAC Reference |
Use Scenario: Programmable lab power supply using TL431-based feedback with enhanced long-term stability. IC Role / Device Role / Timing Role: Secondary reference for TL431 error amplifier bias, improving output voltage drift from 100 ppm/°C to 10 ppm/°C. Use Value: Trim pin allows fine-tuning to match system gain calibration points without adding digital compensation. |
Use Scenario: Calibration of 12-bit DAC in automated test equipment requiring traceable 5.120 V reference. IC Role / Device Role / Timing Role: Factory-trimmed 5V reference adjusted via external pot to exact 5.120 V target with ±0.005% final tolerance. Use Value: +3.5% / –13% trim range and <0.05% TC support one-time hardware calibration meeting ISO/IEC 17025 requirements. |
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 architecture; 5 ppm/°C max TC; 0.05% initial tolerance; higher quiescent current (1.5 mA). | Better TC but less flexible trim (±0.5%); not shunt-capable - requires series pass transistor for negative outputs. | Choose when ultra-low drift (<5 ppm/°C) outweighs dual-mode operation and wide trim range. |
| LT1461ACS8-5#TRPBF | Bandgap-based; 3 ppm/°C max TC; 0.04% initial tolerance; micropower (50 µA IQ); only series mode. | Lower power and drift, but no shunt capability or TEMP pin - unsuitable for bridge excitation or thermal compensation. | Prefer for battery-powered portable instruments where IQ <100 µA and TC <3 ppm/°C are mandatory. |
Compared with LT1236CS8-5#TRPBF and LT1461ACS8-5#TRPBF, the LT1019IS8-5#TRPBF uniquely supports shunt-mode operation, offers the widest trim range (±3.5% to –13%), and integrates a low-sensitivity TEMP pin - making it the only option among the three for negative-reference generation and embedded thermal compensation.
Availability
LT1019IS8-5#TRPBF is available at Aetrix Electronics and suitable for high-accuracy data acquisition, precision bridge excitation, and calibrated DAC reference applications requiring stable component supply across industrial temperature ranges.
Supply support for LT1019IS8-5#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) acquired Linear Technology in 2017 and continues its legacy of high-performance analog ICs for precision signal conditioning and power management.
The LT1019 product line was designed specifically for metrology-grade voltage referencing in industrial instrumentation, automated test equipment, and calibration systems demanding sub-0.1% accuracy and long-term stability.
FAQ
What is the maximum input voltage for LT1019IS8-5#TRPBF in series mode?
The LT1019IS8-5#TRPBF supports up to 40V input voltage in series mode. However, for indefinite short-circuit survival, input must remain below 20V; between 20V and 35V, short-circuit duration is limited to 10 seconds per datasheet Absolute Maximum Ratings. This rating applies regardless of output load or ambient temperature.
Can LT1019IS8-5#TRPBF operate as a shunt reference?
Yes, the LT1019IS8-5#TRPBF can operate in shunt mode - sinking up to 10mA while maintaining 5V output. It requires no external components for shunt operation, unlike standard bandgap references. The INPUT pin floats in shunt mode, and minimum shunt current is 0.5mA per electrical characteristics table.
What is the purpose of the TEMP pin on LT1019IS8-5#TRPBF?
The TEMP pin on LT1019IS8-5#TRPBF provides a PTAT (proportional-to-absolute-temperature) voltage (~2.1 mV/°C at room temperature) with <0.05%/µA loading sensitivity. It enables thermal compensation circuits without degrading reference accuracy - unlike earlier bandgap references where TEMP pin loading directly affected output voltage.
Does LT1019IS8-5#TRPBF require output capacitance for stability?
No, the LT1019IS8-5#TRPBF is internally compensated and stable with all capacitive loads for 4.5V, 5V, and 10V versions. The 5V variant (LT1019IS8-5#TRPBF) does not oscillate under any combination of output capacitance and load current - eliminating need for external bypass caps in most applications.
What is the thermal regulation specification for LT1019IS8-5#TRPBF?
The LT1019IS8-5#TRPBF specifies thermal regulation of 0.5 ppm/mW - quantifying output voltage shift caused by die temperature gradients due to power dissipation changes. For example, a 10 mW change in power dissipation causes a 5 ppm output shift, independent of ambient temperature or TC.
LT1019IS8-5#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:
- ±0.2%
- Temperature Coefficient:
- 20ppm/°C
- Noise - 0.1Hz to 10Hz:
- 2.5ppmp-p
- Noise - 10Hz to 10kHz:
- 2.5ppmrms
- Voltage - Input:
- 6.5V ~ 40V
- Current - Supply:
- 1.5mA
- Current - Cathode:
- 800 µA
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SO
LT1019IS8-5#TRPBF FAQ
1.How can I place an order for LT1019IS8-5#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1019IS8-5#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 LT1019IS8-5#TRPBF reliable?
The price and inventory of LT1019IS8-5#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1019IS8-5#TRPBF is usually 5 days.
3.What payment methods are accepted for LT1019IS8-5#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1019IS8-5#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1019IS8-5#TRPBF?
LT1019IS8-5#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1019IS8-5#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 LT1019IS8-5#TRPBF?
For technical support, including LT1019IS8-5#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1019IS8-5#TRPBF requirements.
6.How does Aetrix verify that LT1019IS8-5#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT1019IS8-5#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 LT1019IS8-5#TRPBF meets industry standards.
7.What is the process for return or replacement of LT1019IS8-5#TRPBF?
All LT1019IS8-5#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1019IS8-5#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 LT1019IS8-5#TRPBF part is unused and in its original packaging.
Return procedure for LT1019IS8-5#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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