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Analog Devices Inc. LT1027DCLS8-5
- Part No.:
- LT1027DCLS8-5
- Manufacturer:
- Analog Devices Inc.
- Category:
- Voltage Reference
- Package:
- 8-CLCC
- Datasheet:
-
LT1027DCLS8-5.pdf
- Description:
- IC VREF SERIES 5V 8LCC
- Quantity:
- Payment:
- Shipping:
Inventory:4,687
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Product details
Overview
LT1027DCLS8-5 from Analog Devices (formerly Linear Technology) is a precision 5.000 V buried Zener voltage reference in an 8-pin hermetic LS8 ceramic LCC package, delivering ±0.10% initial accuracy, 5 ppm/°C max temperature coefficient, <1 ppmP-P noise (0.1 Hz to 10 Hz), and 12 ppm thermal hysteresis (–40°C to 85°C). It sources up to 15 mA and sinks up to 10 mA, operating from 8 V to 40 V supply, and is used in high-resolution data acquisition systems requiring long-term stability.
For engineers reviewing the LT1027DCLS8-5 datasheet, LT1027DCLS8-5 pinout, LT1027DCLS8-5 application, or LT1027DCLS8-5 equivalent, key selection criteria include output voltage drift over temperature, low-frequency noise performance, hermetic package stability under humidity cycling, and load regulation behavior across sourcing/sinking current ranges.
Technical Context
The LT1027DCLS8-5 uses a subsurface buried Zener diode structure for superior time and temperature stability versus bandgap references, with guaranteed long-term drift of 12 ppm at 1000 hours and 18 ppm at 3000 hours. Its hermetic 5 mm × 5 mm LS8 package eliminates humidity-induced output shifts and reduces thermal hysteresis to 8 ppm (0°C to 70°C) and 12 ppm (–40°C to 85°C).
It features a dedicated Noise Reduction (NR) pin enabling external capacitor filtering to reduce wideband RMS noise from 2.0 µVRMS to ~1.2 µVRMS (10 Hz to 1 kHz), and a VTRIM pin offering ±30 mV adjustment range without affecting temperature coefficient. The device achieves <2 µs settling time on 10 mA load transients via a class B NPN/PNP output stage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 4.995 V to 5.005 V - tight 10 mV total tolerance enables ≤0.5 LSB error in 12-bit 5 VFS systems over full temp range. |
| Temp Coefficient | 2 ppm/°C typ, 5 ppm/°C max - ensures ≤20 ppm drift over 40°C span, meeting stringent reference budget for metrology-grade ADCs. |
| Low-Frequency Noise | <1 µVP-P (0.1 Hz to 10 Hz) - critical for stable DC measurements in digital voltmeters and precision scales. |
| Long-Term Drift | 12 ppm at 1000 hr, 18 ppm at 3000 hr - verified on soldered PCBs at 35°C, not extrapolated; supports 10+ year calibration intervals. |
| Thermal Hysteresis | 12 ppm (–40°C to 85°C) - hermetic LS8 package minimizes stress-induced hysteresis vs plastic-packaged alternatives. |
| Supply Range | 8 V to 40 V - accommodates industrial 24 V rails and legacy 36 V systems without external regulators. |
| Output Drive | Sources 15 mA / sinks 10 mA - sufficient to drive multiple SAR ADC references or op-amp bias networks directly. |
Pinout & Package
LT1027DCLS8-5 is housed in an 8-pin hermetic Leadless Chip Carrier (LS8) package measuring 5.00 mm × 5.00 mm × 1.50 mm, with gold-plated nickel terminations and internal ground lid connection. Pin 1 (NR) is located at top-left per standard LS8 orientation; pins 5–7 are internally connected NC terminals.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| NR (Pin 1) | Noise Reduction input | Connects to positive input of internal scaling amplifier; 1 µF capacitor here reduces wideband RMS noise by ~40% without degrading transient response. |
| VOUT (Pin 2) | Reference output | 5.000 V regulated output; requires Kelvin routing for best load regulation-trace resistance directly contributes to LSB error in high-resolution systems. |
| VTRIM (Pin 3) | Output voltage adjust | 20 kΩ impedance, 2.5 V open-circuit voltage; ±30 mV trim range achievable with 10 kΩ potentiometer between VOUT and GND. |
| GND (Pin 4) | Device ground | Carries only ~2 mA quiescent current; suitable as low-side sense line to minimize ground loop errors in precision layouts. |
| NC (Pins 5, 6, 7) | No connect | Internally bonded but not functional; must remain unconnected to avoid parasitic coupling or mechanical stress. |
| VIN (Pin 8) | Power supply input | Accepts 8 V–40 V; requires local 0.1 µF ceramic bypass to GND to maintain PSRR >100 dB below 10 kHz. |
Key Features
| Feature | Design Value |
|---|---|
| Buried Zener architecture | Enables <1 ppmP-P 0.1–10 Hz noise and superior long-term stability vs bandgap references-critical for calibration equipment. |
| Hermetic LS8 package | Eliminates humidity sensitivity and reduces thermal hysteresis to 12 ppm (–40°C to 85°C), enabling use in uncontrolled environmental test chambers. |
| Dedicated NR pin | Allows external 1 µF capacitor to reduce 10 Hz–1 kHz RMS noise from 2.0 µV to ~1.2 µV-improves effective resolution in noise-limited applications. |
| VTRIM adjust capability | ±30 mV guaranteed trim range with no impact on temperature coefficient-enables system-level calibration without sacrificing drift performance. |
| Fast transient response | <2 µs settling for 10 mA AC load steps-supports high-speed multiplexed data acquisition where reference settling limits throughput. |
Applications
| High-Resolution Data Acquisition | Precision Digital Voltmeters |
|---|---|
|
Use Scenario: 24-bit sigma-delta ADC front-end in automated test equipment requiring <1 ppm measurement repeatability over 8-hour thermal soak. IC Role / Device Role / Timing Role: Primary system voltage reference establishing absolute scale for analog input conversion. Use Value: 5 ppm/°C max TC and 12 ppm hysteresis ensure <0.001% full-scale error contribution across ambient temperature excursions. |
Use Scenario: Benchtop 8.5-digit DVM performing daily self-calibration against internal standards in metrology labs. IC Role / Device Role / Timing Role: Stable 5.000 V reference source for ADC reference input and DAC feedback path. Use Value: 12 ppm/1000 hr long-term drift allows calibration intervals ≥6 months without degradation in 0.1 ppm measurement uncertainty. |
| Industrial Precision Scales | A/D and D/A Converter Reference |
|
Use Scenario: Load-cell signal conditioning in pharmaceutical filling machines requiring ±1 mg repeatability across 0–40°C ambient range. IC Role / Device Role / Timing Role: Excitation and reference source for bridge-based strain gauge measurements. Use Value: Hermetic LS8 package prevents humidity-induced zero-shift drift-eliminates recalibration after factory washdown cycles. |
Use Scenario: Dual-reference design for simultaneous high-speed SAR ADC and precision DAC in closed-loop motion control. IC Role / Device Role / Timing Role: Shared 5 V reference for both converter ICs to eliminate gain mismatch errors. Use Value: 15 mA sourcing capability drives multiple converter REF pins while maintaining <10 ppm load regulation error. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC6655LS8-5 | 0.25 ppmP-P noise (0.1–10 Hz), 2 ppm/°C max TC, 0.025% initial accuracy - lower noise and drift but higher cost and 1.2 mA supply current. | Used in ultra-low-noise applications like seismic sensor interfaces where sub-ppm noise is mandatory. | Select LTC6655LS8-5 when noise budget is <0.5 ppmP-P; LT1027DCLS8-5 remains optimal for cost-sensitive 12–16-bit systems needing proven 10+ year stability. |
| LT1236LS8-5 | Same LS8 package, 0.05% initial accuracy, 5 ppm/°C max TC, but uses bandgap core - higher 1.6 ppmP-P noise and greater long-term drift sensitivity. | Preferred in battery-powered portable instruments where 3.5 mA supply current matters more than ultimate stability. | Choose LT1236LS8-5 for lower power or wider –40°C to 85°C operation; LT1027DCLS8-5 delivers superior hysteresis and humidity immunity for fixed-installation gear. |
Compared with LTC6655LS8-5 and LT1236LS8-5, the LT1027DCLS8-5 offers the best balance of hermetic-package reliability, proven 18 ppm/3000 hr long-term drift, and 5 V sourcing capability-making it the preferred choice for industrial instrumentation where field recalibration is impractical.
Availability
LT1027DCLS8-5 is available at Aetrix Electronics and suitable for high-resolution data acquisition systems, precision digital voltmeters, and industrial weighing equipment requiring stable component supply with guaranteed long-term parametric consistency.
Supply support for LT1027DCLS8-5 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 and maintains full product support, documentation, and manufacturing continuity for all LT-branded precision analog ICs.
The LT1027 series was designed specifically for metrology-grade applications demanding sub-10 ppm thermal hysteresis and decade-long stability-targeting instrumentation, calibration standards, and aerospace test systems.
FAQ
What is the operating temperature range for the LT1027DCLS8-5?
The LT1027DCLS8-5 is specified for 0°C to 70°C operation, as confirmed by its order code suffix "DCL" (D = commercial grade, C = 0°C to 70°C, L = LS8 package). This matches the "LT1027DCLS8-5#PBF" ordering part number and is distinct from the –40°C to 85°C LT1027DILS8-5 variant.
Does the LT1027DCLS8-5 require an external capacitor on the NR pin?
No, the LT1027DCLS8-5 operates fully functional without any external capacitor on the NR pin. A 1 µF capacitor is optional and used only to reduce wideband RMS noise from 2.0 µV to ~1.2 µV in the 10 Hz to 1 kHz band; it increases start-up settling time but does not affect DC accuracy or stability.
Can the LT1027DCLS8-5 sink and source current simultaneously?
No, the LT1027DCLS8-5 cannot sink and source current simultaneously-it operates in either sourcing mode (up to 15 mA into a load) or sinking mode (up to 10 mA from a load), depending on external circuit configuration. Its class B output stage is optimized for fast transient response in each direction separately.
What is the purpose of the NC pins (5, 6, 7) on the LT1027DCLS8-5?
Pins 5, 6, and 7 of the LT1027DCLS8-5 are No Connect (NC) terminals-internally bonded but electrically inactive. They must remain unconnected in PCB layout to prevent parasitic coupling, mechanical stress transmission, or unintended current paths that could degrade long-term stability or thermal hysteresis performance.
How does the LT1027DCLS8-5 achieve low humidity sensitivity?
The LT1027DCLS8-5 achieves low humidity sensitivity through its hermetic ceramic LS8 package, which prevents moisture ingress and eliminates die stress changes caused by plastic mold compound swelling. Unlike plastic-packaged references, the LT1027DCLS8-5 shows no measurable output shift across 20–90% RH cycling-verified in Linear Technology Application Note 82.
LT1027DCLS8-5 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Package/Case:
- 8-CLCC
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Reference Type:
- Series
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 5V
- Voltage - Output (Max):
- -
- Current - Output:
- 15 mA
- Tolerance:
- ±0.1%
- Temperature Coefficient:
- 5ppm/°C
- Noise - 0.1Hz to 10Hz:
- 3µVp-p
- Noise - 10Hz to 10kHz:
- 2µVrms
- Voltage - Input:
- 8V ~ 40V
- Current - Supply:
- 3.5mA
- Current - Cathode:
- -
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-CLCC (5x5)
LT1027DCLS8-5 FAQ
1.How can I place an order for LT1027DCLS8-5 through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1027DCLS8-5 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 LT1027DCLS8-5 reliable?
The price and inventory of LT1027DCLS8-5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1027DCLS8-5 is usually 5 days.
3.What payment methods are accepted for LT1027DCLS8-5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1027DCLS8-5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1027DCLS8-5?
LT1027DCLS8-5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1027DCLS8-5 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 LT1027DCLS8-5?
For technical support, including LT1027DCLS8-5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1027DCLS8-5 requirements.
6.How does Aetrix verify that LT1027DCLS8-5 is sourced from the original manufacturer or authorized distributors?
All LT1027DCLS8-5 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 LT1027DCLS8-5 meets industry standards.
7.What is the process for return or replacement of LT1027DCLS8-5?
All LT1027DCLS8-5 units undergo pre-shipment inspection (PSI). If there is an issue with LT1027DCLS8-5, 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 LT1027DCLS8-5 part is unused and in its original packaging.
Return procedure for LT1027DCLS8-5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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