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Analog Devices Inc. LTC6655CHLS8-5
- Part No.:
- LTC6655CHLS8-5
- Manufacturer:
- Analog Devices Inc.
- Category:
- Voltage Reference
- Package:
- 8-CLCC
- Datasheet:
-
LTC6655CHLS8-5.pdf
- Description:
- IC VREF SERIES 0.05% 8LCC
- Quantity:
- Payment:
- Shipping:
Inventory:1,430
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Product details
Overview
LTC6655CHLS8-5 from Analog Devices is a precision 5V bandgap voltage reference in an 8-lead hermetic LS8 package, delivering ±0.025% initial accuracy, 2ppm/°C max temperature drift, and ultra-low 0.25ppmP-P (0.1Hz–10Hz) output noise - enabling high-resolution data acquisition, precision battery monitoring, and metrology-grade instrumentation.
For engineers reviewing the LTC6655CHLS8-5 datasheet, LTC6655CHLS8-5 pinout, LTC6655CHLS8-5 application, or LTC6655CHLS8-5 equivalent, key selection criteria include long-term stability (20ppm/√kHr), thermal hysteresis (30ppm over –40°C to 85°C), humidity immunity, and dual-force/sense output architecture for sub-10ppm/mA load regulation.
Technical Context
The LTC6655CHLS8-5 implements advanced curvature-compensated bandgap topology with separate force (VOUT_F) and sense (VOUT_S) outputs, enabling Kelvin sensing to eliminate trace resistance errors. Its internal 2mA sense current flows through VOUT_S, allowing precise regulation independent of load current magnitude.
It operates from VIN = VOUT + 0.5V (min) to 13.2V (max), supports ±5mA sourcing/sinking, and features active shutdown (<20µA) with logic-compatible SHDN input. The LS8 ceramic LCC package provides hermetic sealing, eliminating humidity-induced drift and enabling stable operation across –40°C to 125°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 5.000V ±0.025% (±1.25mV) - enables direct interface with 24-bit SAR ADCs without trimming |
| Tempco (Drift) | ≤2ppm/°C - ensures <±0.25mV error over full –40°C to 125°C range |
| Low-Frequency Noise | 0.25ppmP-P (0.1Hz–10Hz) = 1.25µVP-P - critical for 20+ bit DC measurements |
| Long-Term Drift | 20ppm/√kHr (LS8 package) - predicts <10ppm drift after 25 years in field use |
| Load Regulation | ≤15ppm/mA (sourcing), ≤45ppm/mA (sinking) - minimized via VOUT_F/VOUT_S separation |
| Shutdown Current | <20µA - enables µA-level power budgeting in portable precision systems |
| Thermal Hysteresis | 30ppm (–40°C to 85°C) - hermetic LS8 package eliminates moisture-related hysteresis |
Pinout & Package
Package: 8-lead ceramic LCC (5mm × 5mm), hermetically sealed, leadless, surface-mount LS8 package - provides superior long-term stability and zero humidity sensitivity versus plastic MSOP variants.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1: SHDN | Active-low shutdown control | Pulls device into <20µA sleep mode; internal pull-up requires external tie-high for robust operation |
| Pin 2: VIN | Power supply input | Operates from VOUT + 0.5V to 13.2V; bypass with ≥0.1µF capacitor to GND for PSRR enhancement |
| Pins 3, 4, 5, 8: GND | Ground terminals | Four dedicated ground pins minimize ground bounce; Pin 4 is primary device ground |
| Pin 6: VOUT_S | Sense output | Sinks fixed 2mA; connects directly at load to cancel trace resistance error (RTRACE × 2mA) |
| Pin 7: VOUT_F | Force output | Sources/sinks ±5mA; drives load while VOUT_S provides feedback - enables true Kelvin regulation |
Key Features
| Feature | Design Value |
|---|---|
| Hermetic LS8 packaging | Eliminates humidity-induced drift and enables stable operation in uncontrolled environments |
| Dual-force/sense outputs | Reduces load regulation error to ≤15ppm/mA by rejecting PCB trace resistance effects |
| 0.25ppmP-P low-frequency noise | Supports 24-bit DC measurement resolution without external filtering |
| 2ppm/°C max tempco | Guarantees ≤±0.25mV output shift over full industrial temperature range |
| 20ppm/√kHr long-term drift | Provides predictable aging behavior for calibration-critical applications over decades |
Applications
| High-Resolution Data Acquisition | Precision Battery Monitoring |
|---|---|
|
Use Scenario: 24-bit delta-sigma ADC front-end in portable multimeters and automated test equipment. IC Role / Device Role / Timing Role: Primary voltage reference for ADC conversion, referenced against internal DAC during calibration cycles. Use Value: 0.25ppmP-P noise and 2ppm/°C drift ensure <±1 LSB error over temperature and time without recalibration. |
Use Scenario: Cell voltage monitoring in EV battery management systems requiring ±1mV accuracy per cell. IC Role / Device Role / Timing Role: Stable 5V reference for multiplexed 16-bit SAR ADC measuring stacked Li-ion cells. Use Value: Hermetic LS8 package prevents humidity-induced drift in under-hood automotive environments. |
| Weigh Scale Load Cell Interface | Metrology-Grade Calibration Equipment |
|
Use Scenario: Bridge excitation and reference in Class I digital weighing instruments operating from –10°C to 50°C. IC Role / Device Role / Timing Role: Precision excitation source and ADC reference for ratiometric bridge measurement. Use Value: Thermal hysteresis of only 30ppm (–40°C to 85°C) ensures repeatability after environmental cycling. |
Use Scenario: Reference standard in portable calibrators used for field verification of laboratory DMMs. IC Role / Device Role / Timing Role: Primary 5V reference traceable to NIST standards via on-board self-test routines. Use Value: 20ppm/√kHr long-term drift allows annual calibration intervals with documented uncertainty budgets. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADR4550BRZ | 5.0V, ±0.02% initial accuracy, 3ppm/°C max drift, SOIC-8 package, no sense pin | Lacks Kelvin sensing; higher thermal hysteresis (50ppm); not hermetic | Choose when board space is constrained and humidity exposure is minimal |
| REF5050AIDR | 5.0V, ±0.05% initial accuracy, 3ppm/°C max drift, SOIC-8, no shutdown | No shutdown mode; higher long-term drift (50ppm/√kHr); plastic package | Choose for cost-sensitive industrial sensors where ultra-stability is secondary |
Compared with ADR4550BRZ and REF5050AIDR, the LTC6655CHLS8-5 delivers superior long-term stability (20ppm/√kHr vs. ≥50ppm/√kHr), hermetic reliability, and force/sense architecture - making it the only option qualified for metrology-grade, field-deployable calibration tools.
Availability
LTC6655CHLS8-5 is available at Aetrix Electronics and suitable for high-resolution data acquisition systems, precision battery monitors, and metrology-grade calibration equipment requiring stable component supply across extended temperature ranges and multi-year product lifecycles.
Supply support for LTC6655CHLS8-5 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 (acquired Linear Technology in 2017) is a global leader in high-performance analog, mixed-signal, and DSP technologies, serving precision instrumentation, industrial automation, and aerospace markets.
The LTC6655 family was designed specifically for metrology-grade voltage references demanding sub-ppm noise, hermetic stability, and Kelvin-regulated outputs - targeting applications where calibration intervals, environmental resilience, and long-term predictability are non-negotiable.
FAQ
What is the maximum supply voltage for the LTC6655CHLS8-5?
The LTC6655CHLS8-5 supports a maximum supply voltage of 13.2V. Operation above this level risks permanent damage. Its minimum supply is VOUT + 0.5V (i.e., 5.5V), ensuring stable regulation even with low headroom - critical for battery-powered precision systems where VIN may sag near end-of-life.
Does the LTC6655CHLS8-5 require external capacitors, and if so, what values?
Yes: a minimum 0.1µF ceramic capacitor must be placed between VIN and GND, and an output capacitor of 2.7µF to 100µF (low-ESR ≤0.1Ω) is mandatory between VOUT_F and GND. The LTC6655CHLS8-5's stability, noise performance, and transient response depend critically on these components - omitting or undersizing them degrades PSRR and causes oscillation.
How does the dual-output (VOUT_F / VOUT_S) architecture improve accuracy in the LTC6655CHLS8-5?
The LTC6655CHLS8-5 uses VOUT_F to drive the load and VOUT_S to sense voltage at the remote load point, sinking a fixed 2mA. This Kelvin configuration cancels voltage drop across PCB traces (error = RTRACE × 2mA), reducing load regulation error to ≤15ppm/mA - a key advantage over single-output references like the REF5050AIDR.
Is the LTC6655CHLS8-5 suitable for automotive under-hood applications?
Yes: the LTC6655CHLS8-5 is fully specified from –40°C to 125°C, features hermetic LS8 packaging (immune to humidity-induced drift), and has been 100% tested at all three temperature extremes. Its 30ppm thermal hysteresis over –40°C to 85°C and 2ppm/°C max drift meet AEC-Q200 stress requirements for engine control and battery monitoring modules.
What is the typical turn-on time for the LTC6655CHLS8-5 with a 3.3µF output capacitor?
The LTC6655CHLS8-5 achieves 0.1% settling in 400µs with a 3.3µF output capacitor. This fast start-up is enabled by its internal 20mA short-circuit current and optimized output buffer - essential for power-gated systems and battery-powered instruments requiring rapid wake-up without reference settling delays.
LTC6655CHLS8-5 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):
- 5V
- 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)
LTC6655CHLS8-5 FAQ
1.How can I place an order for LTC6655CHLS8-5 through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC6655CHLS8-5 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 LTC6655CHLS8-5 reliable?
The price and inventory of LTC6655CHLS8-5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC6655CHLS8-5 is usually 5 days.
3.What payment methods are accepted for LTC6655CHLS8-5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC6655CHLS8-5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC6655CHLS8-5?
LTC6655CHLS8-5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC6655CHLS8-5 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 LTC6655CHLS8-5?
For technical support, including LTC6655CHLS8-5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC6655CHLS8-5 requirements.
6.How does Aetrix verify that LTC6655CHLS8-5 is sourced from the original manufacturer or authorized distributors?
All LTC6655CHLS8-5 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 LTC6655CHLS8-5 meets industry standards.
7.What is the process for return or replacement of LTC6655CHLS8-5?
All LTC6655CHLS8-5 units undergo pre-shipment inspection (PSI). If there is an issue with LTC6655CHLS8-5, 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 LTC6655CHLS8-5 part is unused and in its original packaging.
Return procedure for LTC6655CHLS8-5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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