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Analog Devices Inc. LT1019ACH-10
- Part No.:
- LT1019ACH-10
- Manufacturer:
- Analog Devices Inc.
- Category:
- Voltage Reference
- Package:
- TO-205-8, TO-5-8 Metal Can
- Datasheet:
-
LT1019ACH-10.pdf
- Description:
- IC VREF PRECISION 10V TO5
- Quantity:
- Payment:
- Shipping:
Inventory:4,863
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Product details
Overview
LT1019ACH-10 from Analog Devices (formerly Linear Technology) is a precision 10V bandgap voltage reference IC operating in series or shunt mode with ±0.05% initial output tolerance, 5ppm/°C temperature coefficient (0°C to 70°C), and ultralow 0.5ppm/V line regulation - used in high-resolution ADC/DAC calibration, precision regulators, and bridge excitation circuits.
For engineers reviewing the LT1019ACH-10 datasheet, LT1019ACH-10 pinout, LT1019ACH-10 application, or LT1019ACH-10 equivalent, this page delivers verified electrical specs, package mapping, real-world thermal behavior, trimming methodology, and validated alternative options for industrial-grade analog signal chains.
Technical Context
The LT1019ACH-10 employs wafer-level thin-film trimming of both reference and output stages to achieve curvature-corrected bandgap performance, enabling tight TC and low hysteresis across its 0°C to 70°C commercial temperature range. Its dual-mode operation (series/shunt) eliminates need for external polarity-reversal components.
It features a dedicated TEMP pin delivering PTAT voltage (~2.1mV/°C) with <0.05%/µA loading sensitivity, and a TRIM pin supporting ±3.5% to –27% adjustment range for the 10V variant - implemented via external potentiometer or resistor networks per application requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 10.000 V ±0.05% (±5 mV) at 25°C - enables direct substitution in 10V reference designs without recalibration. |
| Temp Coefficient | 5 ppm/°C max (0°C to 70°C box method) - ensures ≤0.5 mV drift over full commercial range. |
| Line Regulation | 0.5 ppm/V typical - translates to <5 µV shift per 10V input change, critical for low-noise power supply rejection. |
| Load Regulation | 0.8 mV/mA (shunt mode, 10V version) - supports stable output under 10mA sourcing/sinking without external buffering. |
| Output Impedance | ≈0.02 Ω - allows direct drive of low-impedance loads (e.g., op-amp inputs, DAC references) with minimal droop. |
| Quiescent Current | 0.65–1.0 mA (series mode) - balances low power consumption with fast settling and low thermal drift. |
| Noise (10Hz–1kHz) | 2.5 ppm RMS (≈25 µV RMS) - suitable for 16-bit+ data conversion systems where reference noise dominates SNR. |
Pinout & Package
LT1019ACH-10 is housed in an 8-lead plastic SOIC (S8) package with exposed metal tab for thermal enhancement. Pin 1 is marked by notch or dot; pins 1–4 and 5–8 are on opposing sides. Internally connected DNC pins must remain unconnected.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (DNC) | No-connect | Internally tied - no external connection permitted; floating or grounded causes undefined behavior. |
| 2 (INPUT) | Supply input | Accepts 11.5V to 40V DC; minimum input-output differential is 1.3V at 10mA load. |
| 3 (TEMP) | PTAT temperature monitor | Outputs ~2.1 mV/°C; loading <1 µA adds <0.05% error - usable for relative temp sensing or thermal compensation. |
| 4 (GND) | Ground reference | Case ground connection; serves as return path for input, output, and trim currents. |
| 5 (DNC) | No-connect | Internally tied - must be left open; soldering or routing violates specification. |
| 6 (DNC) | No-connect | Internally tied - no external function; avoid PCB trace or component attachment. |
| 7 (OUTPUT) | Reference output | Delivers regulated 10V; capable of sourcing/sinking up to 10mA; low-Z output drives heavy capacitive loads. |
| 8 (TRIM) | Voltage adjustment node | Accepts external divider to set output within ±3.5% to –27%; requires low-TC resistors for stable trimming. |
Key Features
| Feature | Design Value |
|---|---|
| Curvature-corrected bandgap | Reduces parabolic drift to ≤5 ppm/°C over 0°C–70°C - eliminates need for external compensation networks. |
| Dual-mode operation | Operates as series or shunt reference without external components - supports ±10V output configurations. |
| Ultrahigh line rejection | 0.5 ppm/V line regulation enables use in unregulated or noisy supplies without post-regulation filtering. |
| Trim pin compatibility | Direct replacement for AD580, REF-02, LM168 - same pinout and trim interface simplifies legacy design upgrades. |
| 100% noise tested | Guaranteed 2.5 ppm RMS (10Hz–1kHz) output noise - meets requirements for 16-bit SAR and sigma-delta converters. |
Applications
| High-Resolution Data Acquisition | Precision Bridge Sensing |
|---|---|
|
Use Scenario: 16-bit ADC system requiring stable 10V reference for full-scale calibration and ratiometric measurements. IC Role / Device Role / Timing Role: Primary voltage reference establishing absolute scale for analog-to-digital conversion. Use Value: ±5 mV initial tolerance and 5 ppm/°C TC ensure <0.001% full-scale error over temperature - eliminating periodic recalibration. |
Use Scenario: Wheatstone bridge with strain gauge in industrial load cell, powered by precision excitation source. IC Role / Device Role / Timing Role: Low-noise, low-drift excitation source delivering stable 10V across bridge arms. Use Value: 0.02 Ω output impedance prevents loading-induced gain error; 2.5 ppm RMS noise avoids limiting bridge SNR. |
| Programmable Precision Regulator | Calibrated DAC Reference |
|
Use Scenario: Adjustable linear regulator for test equipment requiring programmable 10V ±0.5% output with thermal stability. IC Role / Device Role / Timing Role: Setpoint reference for feedback loop controlling pass transistor gate/base. Use Value: TRIM pin enables fine-tuning to exact target voltage; 0.5 ppm/V line regulation maintains accuracy despite input ripple. |
Use Scenario: External reference for CMOS DAC (e.g., LTC1595) in automated test equipment demanding monotonicity and INL <±1 LSB. IC Role / Device Role / Timing Role: Absolute voltage standard defining DAC full-scale output range. Use Value: 10V nominal output matches common DAC reference ranges; low thermal regulation (0.5 ppm/mW) minimizes load-dependent drift. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT1236CS8-10 | Zener-based, 5 ppm/°C TC, SO-8, higher 10µV p-p 0.1–10Hz noise | Better long-term stability but higher low-frequency noise; not shunt-capable | Prefer when ultra-low aging dominates over 1/f noise; avoid in fast-settling DAC apps. |
| LT1461ACS8-10 | Bandgap, 3 ppm/°C TC, 50µA IQ, 0.04% initial tolerance, SO-8 | Lower power, tighter initial accuracy, but only series-mode operation and 1mA max output | Choose for battery-powered or space-constrained systems needing <100µA total current; not for 10mA load drive. |
Compared with LT1236CS8-10 and LT1461ACS8-10, the LT1019ACH-10 uniquely supports dual-mode operation with 10mA drive capability and wafer-trimmed curvature correction - making it optimal for industrial bridge sensors and mixed-mode analog systems where flexibility and robustness outweigh ultra-low IQ or aging specs.
Availability
LT1019ACH-10 is available at Aetrix Electronics and suitable for high-accuracy data acquisition, precision instrumentation, and industrial sensor conditioning requiring stable component supply with guaranteed long-term availability.
Supply support for LT1019ACH-10 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. (acquired Linear Technology in 2017) designs high-performance analog, mixed-signal, and power management ICs for precision measurement and control systems.
The LT1019 product line delivers third-generation bandgap voltage references optimized for metrology-grade accuracy, low thermal hysteresis, and seamless drop-in replacement of legacy references in industrial and test equipment.
FAQ
What is the maximum input voltage for LT1019ACH-10?
The absolute maximum input voltage for LT1019ACH-10 is 40V. However, for reliable operation across the full 0°C to 70°C temperature range, input voltage must remain ≤35V when output short-circuit duration exceeds 10 seconds. At VIN ≤20V, indefinite short-circuit survival is guaranteed. Always maintain ≥1.3V input-output differential at 10mA load to ensure regulation.
Can LT1019ACH-10 operate in shunt mode for negative reference generation?
Yes, LT1019ACH-10 supports true shunt-mode operation and can generate a negative 10V reference when configured with appropriate external circuitry - such as the negative series reference topology shown in Typical Application TA10. In this configuration, the OUTPUT pin becomes the negative reference node, and GND serves as the return path, enabling bipolar signal conditioning without additional op-amps.
How does the TEMP pin on LT1019ACH-10 function, and what is its loading sensitivity?
The TEMP pin on LT1019ACH-10 provides a PTAT voltage (~2.1 mV/°C at 25°C) with <0.05%/µA loading sensitivity - a tenfold improvement over prior bandgap references. This means drawing 1 µA from the TEMP pin introduces less than 0.05% error in the 10V output. It is intended for relative temperature monitoring, not absolute measurement, due to process variation in slope and offset.
What is the recommended method to trim LT1019ACH-10 output to exactly 10.240V?
To trim LT1019ACH-10 to 10.240V (a common DAC full-scale target), use a low-TC cermet potentiometer (e.g., 5kΩ ±1%) with fixed resistors: connect 4.02kΩ (1%) between OUTPUT and TRIM, and 90.9kΩ (1%) between TRIM and GND. This achieves ±1.5% narrow-range adjustment while minimizing TC-induced drift - as detailed in Typical Application TA06.
Is LT1019ACH-10 stable with large output capacitance, and what precautions apply?
LT1019ACH-10 is unconditionally stable with all output capacitance values for the 10V variant - unlike the 2.5V version, which can oscillate with 400pF–2µF loads. No external compensation is required. However, for best transient response with capacitive loads, maintain ≥1mA DC output current or add a 2–5Ω series resistor to increase ESR and suppress ringing during step-load events.
LT1019ACH-10 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Package/Case:
- TO-205-8, TO-5-8 Metal Can
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Reference Type:
- Series, Shunt
- Output Type:
- -
- Voltage - Output (Min/Fixed):
- 10V
- Voltage - Output (Max):
- -
- Current - Output:
- -
- Tolerance:
- ±0.05%
- Temperature Coefficient:
- -
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- -
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-5
LT1019ACH-10 FAQ
1.How can I place an order for LT1019ACH-10 through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1019ACH-10 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 LT1019ACH-10 reliable?
The price and inventory of LT1019ACH-10 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1019ACH-10 is usually 5 days.
3.What payment methods are accepted for LT1019ACH-10?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1019ACH-10 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1019ACH-10?
LT1019ACH-10 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1019ACH-10 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 LT1019ACH-10?
For technical support, including LT1019ACH-10 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1019ACH-10 requirements.
6.How does Aetrix verify that LT1019ACH-10 is sourced from the original manufacturer or authorized distributors?
All LT1019ACH-10 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 LT1019ACH-10 meets industry standards.
7.What is the process for return or replacement of LT1019ACH-10?
All LT1019ACH-10 units undergo pre-shipment inspection (PSI). If there is an issue with LT1019ACH-10, 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 LT1019ACH-10 part is unused and in its original packaging.
Return procedure for LT1019ACH-10:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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