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Analog Devices Inc. LTC6655CHLS8-4.096
- Part No.:
- LTC6655CHLS8-4.096
- Manufacturer:
- Analog Devices Inc.
- Category:
- Voltage Reference
- Package:
- 8-CLCC
- Datasheet:
-
LTC6655CHLS8-4.096.pdf
- Description:
- IC VREF SERIES 0.05% 8LCC
- Quantity:
- Payment:
- Shipping:
Inventory:4,062
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Product details
Overview
LTC6655CHLS8-4.096 from Analog Devices is a precision bandgap voltage reference delivering 4.096V output with ±0.025% initial accuracy, 2ppm/°C max temperature drift, and 0.25ppmP-P (0.1Hz–10Hz) low-frequency noise. It operates from VIN = VOUT + 0.5V up to 13.2V, sinks/sources ±5mA, and is housed in a hermetic 5mm × 5mm LS8 package for high-stability applications including 16-bit+ data acquisition and precision battery monitoring.
For engineers reviewing the LTC6655CHLS8-4.096 datasheet, LTC6655CHLS8-4.096 pinout, LTC6655CHLS8-4.096 application, or LTC6655CHLS8-4.096 equivalent, key selection criteria include thermal hysteresis (30ppm over –40°C to 85°C), long-term drift (20ppm/√kHr), humidity immunity (hermetic LS8), load regulation (<15ppm/mA sourcing), and shutdown current (<20µA).
Technical Context
The LTC6655CHLS8-4.096 uses advanced curvature-compensated bandgap architecture to achieve predictable, monotonic temperature behavior and <2ppm/°C drift across –40°C to 125°C. Its dual-output topology (VOUT_F and VOUT_S) enables Kelvin sensing to eliminate trace resistance errors - critical for sub-ppm system-level accuracy.
It integrates internal 2mA sense current for VOUT_S, supports 2.7µF–100µF output capacitance with ESR ≤ 0.1Ω, and features rail-to-rail shutdown control with hysteresis-aware thresholds (VTH_UP ≈ 2.0V, VTH_DN ≈ 0.8V at VIN = 5V). The LS8 ceramic LCC package eliminates humidity-induced drift and reduces thermal hysteresis versus plastic MSOP variants.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 4.096V ±0.025% (±1.024mV) - enables direct interface with 12-bit/16-bit ADCs using VREF = VFS/2n scaling. |
| Temp Coefficient | ≤2ppm/°C (max, –40°C to 125°C) - ensures <±0.25mV total drift over full industrial range. |
| Low-Freq Noise | 0.25ppmP-P (0.1Hz–10Hz) = 1.024µVP-P - preserves ENOB in high-resolution sigma-delta converters. |
| Load Regulation | <15ppm/mA (sourcing), <45ppm/mA (sinking) - maintains stability under dynamic load changes in precision regulators. |
| Long-Term Drift | 20ppm/√kHr (LS8 package) - predicts ~60ppm drift after 9,000 hours; suitable for 10+ year field deployments. |
| Thermal Hysteresis | 30ppm (–40°C ↔ 85°C cycle) - minimized by hermetic ceramic packaging and stress-relieved die attach. |
| Shutdown Current | <20µA - enables µA-level power budgeting in battery-powered instrumentation. |
Pinout & Package
The LTC6655CHLS8-4.096 is supplied in an 8-pin leadless ceramic chip carrier (LS8), 5mm × 5mm, hermetically sealed, with exposed pad grounded internally. This package provides humidity immunity, low thermal hysteresis, and superior long-term stability vs. plastic MSOP alternatives.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - SHDN | Active-low shutdown control | Pulled high internally; tie externally to VIN or logic high for normal operation; sinking to GND reduces supply current to <20µA. |
| 2 - VIN | Power supply input | Accepts 4.596V–13.2V (≥VOUT + 0.5V); requires ≥0.1µF ceramic bypass capacitor to GND for PSRR optimization. |
| 3, 5, 8 - GND | Internal ground terminals | Must be connected to system ground plane; multiple pins reduce ground impedance and improve noise rejection. |
| 4 - GND | Main device ground | Primary ground reference; connect directly to low-noise ground plane - not shared with digital or power grounds. |
| 6 - VOUT_S | Sense input (Kelvin feedback) | Sinks 2mA; connect at load point to cancel trace IR drop - error = Rtrace × 2mA, independent of load current. |
| 7 - VOUT_F | Force output (regulated source) | Sources/sinks ±5mA; requires 2.7µF–100µF low-ESR output capacitor (ESR ≤ 0.1Ω) for stability and low noise. |
Key Features
| Feature | Design Value |
|---|---|
| No humidity sensitivity | Hermetic LS8 ceramic package eliminates moisture-induced voltage shift - critical for outdoor or uncontrolled-environment deployments. |
| Kelvin-sense architecture | VOUT_S/VOUT_F separation enables true 4-wire referencing, removing PCB trace resistance error even at ±5mA load. |
| Ultra-low 0.1Hz–10Hz noise | 0.25ppmP-P (1.024µVP-P) - supports >20-bit effective resolution in precision weigh scales and medical front-ends. |
| Guaranteed performance over temperature | 100% tested at –40°C, 25°C, and 125°C - ensures parametric compliance without derating in automotive or industrial systems. |
| Low dropout & wide supply range | Operates with only 500mV headroom (VIN − VOUT) up to 13.2V - simplifies supply design in mixed-voltage systems. |
Applications
| High-Resolution Data Acquisition | Precision Battery Monitoring |
|---|---|
|
Use Scenario: 24-bit delta-sigma ADC measuring thermocouple or strain gauge signals in automated test equipment. IC Role / Device Role / Timing Role: Primary voltage reference for ADC VREF, providing stable 4.096V reference with sub-ppm drift and ultra-low noise. Use Value: Enables 20+ ENOB by minimizing reference-induced noise and drift - eliminating need for periodic recalibration. |
Use Scenario: Monitoring individual cell voltages in 12S Li-ion battery packs for EV or energy storage systems. IC Role / Device Role / Timing Role: Reference for 16-bit SAR ADC measuring 0–4.2V cell voltage with ±0.1mV absolute accuracy. Use Value: 4.096V output matches 12-bit full-scale (4096 codes), enabling 1mV LSB resolution without gain scaling. |
| Weigh Scale Instrumentation | Medical Patient Monitoring |
|
Use Scenario: High-accuracy platform scale using 350Ω load cells and low-noise instrumentation amplifier chain. IC Role / Device Role / Timing Role: Reference for bridge excitation and ADC conversion in microcontroller-based weighing engine. Use Value: 0.25ppmP-P noise and 30ppm thermal hysteresis ensure repeatability <0.005% FS across ambient temperature swings. |
Use Scenario: Portable ECG or blood glucose meter requiring FDA-grade accuracy and long-term calibration stability. IC Role / Device Role / Timing Role: Precision reference for analog front-end signal conditioning and ADC in Class II medical devices. Use Value: Hermetic LS8 package prevents humidity-induced drift - meeting IEC 60601-1 environmental reliability 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 |
|---|---|---|---|
| ADR4540BRZ | 4.096V, ±0.02% initial accuracy, 3ppm/°C drift, 1.2µVP-P (0.1–10Hz), SOIC-8 package | Higher drift and noise than LTC6655CHLS8-4.096; no Kelvin sensing; plastic package susceptible to humidity | Select when cost sensitivity outweighs long-term stability and ultra-low noise requirements. |
| REF5040AIDR | 4.096V, ±0.05% initial accuracy, 3ppm/°C drift, 1.5µVP-P (0.1–10Hz), SOIC-8, no shutdown | No shutdown mode; higher initial error and noise; lacks VOUT_S/VOUT_F separation for Kelvin sensing | Choose for legacy designs already using TI REF50xx family and where shutdown functionality is unnecessary. |
Compared with ADR4540BRZ and REF5040AIDR, the LTC6655CHLS8-4.096 delivers lower drift (2ppm/°C vs. ≥3ppm/°C), lower noise (1.024µVP-P vs. ≥1.2µVP-P), hermetic stability, and Kelvin sensing - making it optimal for metrology-grade and safety-critical applications demanding verified long-term performance.
Availability
LTC6655CHLS8-4.096 is available at Aetrix Electronics and suitable for high-resolution data acquisition systems, precision battery monitors, and medical instrumentation requiring stable component supply with guaranteed long-term drift and hermetic reliability.
Supply support for LTC6655CHLS8-4.096 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 (acquired Linear Technology in 2017) is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors.
The LTC6655 series was designed specifically for metrology-grade voltage references - targeting instrumentation, test equipment, and industrial systems where sub-ppm stability, ultra-low noise, and hermetic reliability are non-negotiable.
FAQ
What is the maximum operating temperature range for the LTC6655CHLS8-4.096?
The LTC6655CHLS8-4.096 is fully specified and 100% tested over –40°C to +125°C. Its hermetic LS8 package ensures reliable operation across this full industrial/automotive range without parameter derating or performance degradation due to humidity or thermal stress.
Does the LTC6655CHLS8-4.096 require external capacitors, and if so, what values?
Yes - the LTC6655CHLS8-4.096 requires a minimum 0.1µF ceramic capacitor between VIN and GND, and an output capacitor of 2.7µF to 100µF (low-ESR ≤ 0.1Ω) between VOUT_F and GND. These are mandatory for stability, noise suppression, and proper transient response.
How does the Kelvin sensing (VOUT_S/VOUT_F) configuration improve accuracy in the LTC6655CHLS8-4.096?
The LTC6655CHLS8-4.096 uses VOUT_S to sense voltage at the load point, sinking a fixed 2mA current. This cancels trace resistance error (ΔV = Rtrace × 2mA), enabling true 4-wire referencing - critical for maintaining sub-ppm accuracy across PCB layouts with varying copper thickness or trace length.
What is the typical turn-on time for the LTC6655CHLS8-4.096 with a 3.3µF output capacitor?
With a 3.3µF output capacitor, the LTC6655CHLS8-4.096 achieves 0.1% settling in 400µs. This is slew-limited by internal short-circuit current (~20mA) and is independent of input voltage within the valid operating range.
Is the LTC6655CHLS8-4.096 susceptible to humidity-induced drift?
No - the LTC6655CHLS8-4.096 uses a hermetic 5mm × 5mm ceramic LS8 package that completely isolates the die from ambient humidity. Unlike plastic-packaged references, it exhibits zero humidity sensitivity, ensuring stable output in high-RH environments such as medical or outdoor instrumentation.
LTC6655CHLS8-4.096 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):
- 4.096V
- Voltage - Output (Max):
- -
- Current - Output:
- 5 mA
- Tolerance:
- ±0.05%
- Temperature Coefficient:
- 5ppm/°C
- Noise - 0.1Hz to 10Hz:
- 0.25ppmp-p
- Noise - 10Hz to 10kHz:
- 0.67ppmrms
- Voltage - Input:
- 13.2V
- Current - Supply:
- 7.5mA
- Current - Cathode:
- -
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-CLCC (5x5)
LTC6655CHLS8-4.096 FAQ
1.How can I place an order for LTC6655CHLS8-4.096 through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC6655CHLS8-4.096 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 LTC6655CHLS8-4.096 reliable?
The price and inventory of LTC6655CHLS8-4.096 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC6655CHLS8-4.096 is usually 5 days.
3.What payment methods are accepted for LTC6655CHLS8-4.096?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC6655CHLS8-4.096 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC6655CHLS8-4.096?
LTC6655CHLS8-4.096 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC6655CHLS8-4.096 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 LTC6655CHLS8-4.096?
For technical support, including LTC6655CHLS8-4.096 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC6655CHLS8-4.096 requirements.
6.How does Aetrix verify that LTC6655CHLS8-4.096 is sourced from the original manufacturer or authorized distributors?
All LTC6655CHLS8-4.096 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 LTC6655CHLS8-4.096 meets industry standards.
7.What is the process for return or replacement of LTC6655CHLS8-4.096?
All LTC6655CHLS8-4.096 units undergo pre-shipment inspection (PSI). If there is an issue with LTC6655CHLS8-4.096, 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 LTC6655CHLS8-4.096 part is unused and in its original packaging.
Return procedure for LTC6655CHLS8-4.096:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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