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Analog Devices Inc. LT6654AHLS8-2.5
- Part No.:
- LT6654AHLS8-2.5
- Manufacturer:
- Analog Devices Inc.
- Category:
- Voltage Reference
- Package:
- 8-CLCC
- Datasheet:
-
LT6654AHLS8-2.5.pdf
- Description:
- IC VREF SERIES 0.05% 8LCC
- Quantity:
- Payment:
- Shipping:
Inventory:3,344
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Product details
Overview
LT6654AHLS8-2.5 from Analog Devices is a precision 2.5V voltage reference IC in an 8-lead ceramic LCC (5mm × 5mm) hermetic package, rated for –40°C to 125°C operation. It delivers ±0.05% initial accuracy, 10ppm/°C max temperature drift, 1.6ppmP-P (0.1Hz–10Hz) low noise, ±10mA output drive, and 100mV max dropout - enabling high-resolution ADC/DAC biasing in automotive and industrial sensing systems.
For engineers reviewing the LT6654AHLS8-2.5 datasheet, LT6654AHLS8-2.5 pinout, LT6654AHLS8-2.5 application, or LT6654AHLS8-2.5 equivalent, this page provides verified specifications, LS8 package terminal mapping, A-grade thermal stability data, and validated alternatives for high-accuracy analog signal chains requiring long-term drift ≤15ppm/√kHr and low-noise reference performance.
Technical Context
The LT6654AHLS8-2.5 integrates a curvature-compensated bandgap core with a buffered output stage, enabling bidirectional ±10mA current sourcing/sinking while maintaining precise load regulation (≤8ppm/mA sourcing, ≤25ppm/mA sinking). Its LS8 hermetic ceramic package reduces thermal hysteresis to 15ppm over –40°C to 125°C and supports long-term stability of 15ppm/√kHr.
Designed for wide-supply operation up to 36V with only 350µA typical supply current, it features 5ppm/V line regulation and operates down to VIN = VOUT + 100mV. The device is AEC-Q100 qualified and fully specified across its extended temperature range without derating.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.5V ±0.05% (±1.25mV) initial tolerance - ensures direct compatibility with 12-bit+ SAR and sigma-delta ADCs without calibration. |
| Temp Coefficient | 10ppm/°C max (A-grade) - guarantees ≤±1.25mV total drift over –40°C to 125°C, critical for unheated automotive sensor modules. |
| Output Noise | 1.6ppmP-P (0.1Hz–10Hz), 2.0ppmRMS (10Hz–1kHz) - enables <18-bit effective resolution in precision data acquisition front-ends. |
| Load Regulation | 8ppm/mA max (sourcing), 25ppm/mA max (sinking) - maintains stable reference under dynamic DAC or op-amp bias loads. |
| Dropout Voltage | 100mV max at 10mA - allows operation from 2.6V supplies, supporting low-voltage battery-powered instrumentation. |
| Long-Term Drift | 15ppm/√kHr (LS8 package) - provides predictable aging behavior for 10+ year field deployments in industrial control systems. |
| Supply Range | 2.6V to 36V - accommodates wide-input power rails including 12V/24V automotive and industrial bus architectures. |
Pinout & Package
LT6654AHLS8-2.5 uses an 8-lead leadless chip carrier (LS8) package: 5mm × 5mm surface-mount hermetic ceramic with exposed pad (no thermal pad connection required). Pin 1 is top-left corner when marking "665425" is oriented upright.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (DNC) | Do Not Connect | Internally connected; external connection risks leakage-induced error or instability. |
| 2 (NC) | No Connect | Not internally bonded; may be left floating or tied to GND/VIN/VOUT per layout needs. |
| 3 (GND) | Internal Ground | Must be star-connected near Pin 4 to minimize ground loop errors in precision circuits. |
| 4 (GND) | Primary Ground | Main return path for load and internal circuitry; requires low-inductance PCB connection. |
| 5 (VOUT) | Reference Output | Main 2.5V output; requires ≥1µF ceramic capacitor to GND for stability and noise filtering. |
| 6 (VOUT) | Reference Output | Redundant output pin; must be tied directly to Pin 5 for optimal load regulation performance. |
| 7 (DNC) | Do Not Connect | Internally connected; avoid routing traces or vias to prevent parasitic coupling. |
| 8 (VIN) | Power Input | Input supply pin; bypass with ≥0.1µF capacitor to Pin 4 GND for ripple rejection. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional ±10mA drive | Enables active load compensation and negative reference configuration without external components. |
| Hermetic LS8 packaging | Delivers 15ppm thermal hysteresis and 15ppm/√kHr long-term drift - superior to plastic SOT-23 variants. |
| AEC-Q100 qualification | Validated for automotive applications including engine control units and ADAS sensor interfaces. |
| Low 1.6ppmP-P noise | Minimizes quantization uncertainty in 24-bit delta-sigma ADCs used in medical and test equipment. |
| 36V max input rating | Supports direct connection to unregulated 24V industrial rails with integrated transient protection margin. |
Applications
| Automotive Engine Control Unit (ECU) | Industrial Temperature Transmitter |
|---|---|
Use Scenario: Precision 4–20mA current loop transmitter measuring exhaust gas temperature in diesel engines. IC Role / Device Role / Timing Role: 2.5V reference for 16-bit DAC generating loop current setpoint and for ratiometric RTD bridge excitation. Use Value: 10ppm/°C drift and –40°C to 125°C rating ensure full-range accuracy without cold-junction compensation or recalibration. |
Use Scenario: Loop-powered 2-wire temperature transmitter with HART digital overlay in oil & gas refineries. IC Role / Device Role / Timing Role: Stable 2.5V reference for ADC conversion of thermocouple/RTD signals and for microcontroller VREF input. Use Value: LS8 hermetic package prevents moisture-induced drift in humid, high-vibration environments where plastic packages degrade. |
| High-Resolution Data Acquisition System | Medical Patient Monitor Front-End |
Use Scenario: Portable 24-bit multichannel data logger capturing vibration, strain, and pressure in predictive maintenance gear. IC Role / Device Role / Timing Role: Low-noise 2.5V reference for simultaneous sampling ADCs driving anti-aliasing filters and digital isolation stages. Use Value: 1.6ppmP-P noise ensures >110dB SNR, preserving ENOB above 20 bits even at 10SPS with oversampling. |
Use Scenario: ECG/EEG analog front-end in bedside patient monitors requiring FDA-cleared signal fidelity. IC Role / Device Role / Timing Role: Primary reference for programmable gain instrumentation amplifiers and 24-bit sigma-delta ADCs digitizing biopotential signals. Use Value: ±0.05% initial accuracy and 15ppm/√kHr aging support IEC 60601-2-27 compliance for 5-year calibration intervals. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT6654AHLS8-2.048 | 2.048V output, identical LS8 package, same A-grade specs (±0.05%, 10ppm/°C, 1.5ppmP-P). | Optimized for 12-bit/16-bit ADCs using 2.048V full-scale; not drop-in for 2.5V systems. | Select only if system architecture mandates 2.048V reference (e.g., legacy 2.048V ADCs or specific DAC codes). |
| REF5025IDR | 2.5V, SOIC-8, ±0.05% initial, 3ppm/°C max drift, 1.9ppmP-P noise, but only rated to 125°C (not –40°C start). | Lacks extended low-temp capability and hermetic stability; unsuitable for automotive cold-cranking or outdoor industrial use. | Consider for cost-sensitive commercial-grade applications where –40°C operation and long-term drift are not required. |
Compared with LT6654AHLS8-2.5, LT6654AHLS8-2.048 offers identical stability and noise in the same LS8 package but targets different ADC scaling, while REF5025IDR trades hermetic reliability and low-temperature operation for lower cost and wider availability in non-automotive contexts.
Availability
LT6654AHLS8-2.5 is available at Aetrix Electronics and suitable for automotive engine control units, industrial temperature transmitters, and high-resolution data acquisition systems requiring stable component supply across extended temperature ranges and multi-year production cycles.
Supply support for LT6654AHLS8-2.5 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. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.
The LT6654 family was designed for ultra-stable, low-drift, low-noise voltage references in harsh environments - specifically targeting automotive, high-temperature industrial, and precision instrumentation applications demanding AEC-Q100 qualification and hermetic reliability.
FAQ
What is the operating temperature range for LT6654AHLS8-2.5?
The LT6654AHLS8-2.5 is fully specified from –40°C to 125°C. This extended range is enabled by its LS8 hermetic ceramic package and A-grade curvature-compensated bandgap design, making it suitable for under-hood automotive and high-temperature industrial deployments where plastic-package references fail.
Does LT6654AHLS8-2.5 support sinking current, and how much?
Yes, LT6654AHLS8-2.5 can sink up to –10mA while maintaining regulation. Its bidirectional output stage allows use as a precision negative reference (e.g., –2.5V with inverted topology) or active load compensation, with sinking load regulation specified at ≤25ppm/mA over the full temperature range.
What is the recommended output capacitor for LT6654AHLS8-2.5?
A minimum 1µF ceramic capacitor is required between VOUT (Pins 5 & 6) and GND (Pin 4) for stable operation. Larger values (e.g., 4.7µF) improve low-frequency noise rejection but increase turn-on time; the device remains stable with capacitors up to 100µF.
How does the LS8 package improve long-term stability versus SOT-23 versions?
The LS8 hermetic ceramic package reduces moisture ingress and mechanical stress, delivering 15ppm/√kHr long-term drift versus 60ppm/√kHr for TSOT-23 variants. Its thermal hysteresis is also lower (15ppm vs 40ppm for S6), critical for applications requiring repeatable accuracy after thermal cycling.
Is LT6654AHLS8-2.5 AEC-Q100 qualified, and which grade?
Yes, LT6654AHLS8-2.5 is AEC-Q100 qualified for automotive applications. It meets Grade 1 requirements (–40°C to 125°C), with full characterization including HTOL, TCT, and ESD testing - confirmed in Analog Devices' official automotive reliability reports.
LT6654AHLS8-2.5 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Package/Case:
- 8-CLCC
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Obsolete
- Reference Type:
- Series
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 2.5V
- Voltage - Output (Max):
- -
- Current - Output:
- 10 mA
- Tolerance:
- ±0.05%
- Temperature Coefficient:
- 10ppm/°C
- Noise - 0.1Hz to 10Hz:
- 1.5ppmp-p
- Noise - 10Hz to 10kHz:
- 2ppmrms
- Voltage - Input:
- 3V ~ 36V
- Current - Supply:
- 600µA
- Current - Cathode:
- -
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-CLCC (5x5)
LT6654AHLS8-2.5 FAQ
1.How can I place an order for LT6654AHLS8-2.5 through Aetrix?
Please submit a Request for Quotation (RFQ) for LT6654AHLS8-2.5 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 LT6654AHLS8-2.5 reliable?
The price and inventory of LT6654AHLS8-2.5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT6654AHLS8-2.5 is usually 5 days.
3.What payment methods are accepted for LT6654AHLS8-2.5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT6654AHLS8-2.5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT6654AHLS8-2.5?
LT6654AHLS8-2.5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT6654AHLS8-2.5 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 LT6654AHLS8-2.5?
For technical support, including LT6654AHLS8-2.5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT6654AHLS8-2.5 requirements.
6.How does Aetrix verify that LT6654AHLS8-2.5 is sourced from the original manufacturer or authorized distributors?
All LT6654AHLS8-2.5 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 LT6654AHLS8-2.5 meets industry standards.
7.What is the process for return or replacement of LT6654AHLS8-2.5?
All LT6654AHLS8-2.5 units undergo pre-shipment inspection (PSI). If there is an issue with LT6654AHLS8-2.5, 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 LT6654AHLS8-2.5 part is unused and in its original packaging.
Return procedure for LT6654AHLS8-2.5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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