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Analog Devices Inc. LTK001CN8#PBF
- Part No.:
- LTK001CN8#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Sensor and Detector Interfaces
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
LTK001CN8#PBF.pdf
- Description:
- IC THERMOCOUPL 2 PIECE KIT 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:2,309
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Product details
Overview
LTK001CN8#PBF from Analog Devices (formerly Linear Technology) is a matched thermocouple amplifier and cold-junction compensator kit optimized for precision temperature measurement with Type E, J, K, R, S, and T thermocouples. It delivers 0.75°C initial accuracy (A version), 40.6µV/°C output for Type K, 480µA typical supply current, and operates from single 5V to ±20V supplies in an 8-lead PDIP package.
For engineers reviewing the LTK001CN8#PBF datasheet, LTK001CN8#PBF pinout, LTK001CN8#PBF application, or LTK001CN8#PBF equivalent, this device is selected for high-stability thermocouple signal conditioning where warmup drift, input bias current (<600pA), and offset voltage (<35µV) critically impact measurement fidelity across 0°C to 70°C industrial environments.
Technical Context
The LTK001CN8#PBF integrates two functionally distinct die: a precision low-drift amplifier (LTKA0x variant) and a factory-matched LT1025 cold-junction compensator. The amplifier provides high gain (>400 V/mV), ultra-low input bias current (±200 pA typ), and rail-to-rail common-mode input range referenced to supplies. Its offset voltage drift is guaranteed ≤1.5 µV/°C over full temperature range.
The LT1025-based compensator delivers preset outputs at 60.9µV/°C (E), 51.7µV/°C (J), 40.6µV/°C (K/T), and 5.95µV/°C (R/S), plus a scalable 10mV/°C reference. Matching between amplifier and compensator is achieved by polarity-sorting components to cancel initial room-temperature errors-eliminating worst-case error summation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Initial Accuracy (Type K) | 0.75°C max at 25°C - enables direct use without calibration in Class I thermocouple systems |
| Supply Current | 480 µA typical - minimizes self-heating and warmup drift during power-up stabilization |
| Input Offset Voltage | <35 µV - ensures sub-1°C error contribution even with 40.6 µV/°C K-type sensitivity |
| Input Bias Current | <600 pA - allows high-impedance RC filters without degrading offset or drift performance |
| Output Sensitivity (K-type) | 40.6 µV/°C - matches standard K thermocouple Seebeck coefficient for 1:1 scaling |
| Operating Temp Range | 0°C to 70°C - validated for commercial-grade instrumentation and data acquisition front-ends |
| Total Temp Error (0–70°C) | 2.6°C max for K/T types - specifies worst-case system-level error including slope and offset contributions |
Pinout & Package
Package: 8-lead narrow-body PDIP (N8), 0.300-inch width, JEDEC MS-001 compliant. RoHS-compliant lead finish; body material is plastic with internal cavity for matched die assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VOS TRIM (Amplifier) | Offset null adjustment node - connects external trim potentiometer to minimize initial DC error |
| 2 | –IN (Amplifier) | Inverting input - accepts thermocouple negative leg; high-impedance node sensitive to layout parasitics |
| 3 | +IN (Amplifier) | Non-inverting input - accepts thermocouple positive leg; referenced to cold-junction compensated ground |
| 4 | V– (Amplifier) | Negative supply rail - shared with LT1025 ground reference; requires low-noise decoupling |
| 5 | V– (Compensator) | Compensator ground - electrically tied to amplifier V–; forms common reference for all outputs |
| 6 | VIN (Compensator) | Compensator input - accepts 5V supply; internally regulated to generate precise 10mV/°C reference |
| 7 | GND | System ground - serves as return path for both amplifier and compensator; must be star-point connected |
| 8 | VOUT (Compensator) | 10mV/°C output - primary cold-junction reference; used directly or scaled via resistor network for custom thermocouples |
Key Features
| Feature | Design Value |
|---|---|
| Factory-matched amplifier + compensator pair | Eliminates need to sum individual component errors - guarantees 0.75°C initial accuracy without user matching |
| Ultra-low warmup drift architecture | Separate thermal domains for amplifier and compensator prevent compensator self-heating from corrupting cold-junction reading |
| Preset thermocouple sensitivities | Direct 40.6µV/°C (K/T), 51.7µV/°C (J), 60.9µV/°C (E) outputs - no external gain-setting resistors required |
| Scalable 10mV/°C reference output | Enables accurate compensation for arbitrary thermocouple types (e.g., N, B, C) using simple resistor dividers |
| Low-power operation (480µA) | Reduces thermal gradient across PCB - critical for minimizing measurement drift in unventilated enclosures |
Applications
| Industrial Process Monitoring | Medical Temperature Sensors |
|---|---|
Use Scenario: Continuous monitoring of reactor vessel temperatures in chemical plants using Type K thermocouples embedded in stainless-steel sheaths. IC Role / Device Role / Timing Role: Cold-junction compensator and signal conditioner - converts raw thermocouple mV output into stable, linearized voltage proportional to absolute temperature. Use Value: Delivers 0.75°C initial accuracy and <2.6°C total error over 0–70°C ambient - meets ISA-71.04 G2 corrosion severity requirements for long-term reliability. |
Use Scenario: Patient temperature sensing in ICU ventilators and infusion pumps, where sensor drift directly impacts therapy delivery safety. IC Role / Device Role / Timing Role: Precision analog front-end - conditions Type T thermocouple signals from disposable probe tips while rejecting EMI from switching power supplies. Use Value: Input bias current <600 pA prevents loading of high-impedance thermocouple leads - maintains accuracy despite cable lengths up to 3 meters. |
| Laboratory Data Acquisition | Environmental Test Chambers |
Use Scenario: Multi-channel temperature logging in semiconductor wafer probe stations, requiring simultaneous readout of 16+ K-type sensors. IC Role / Device Role / Timing Role: Matched amplifier-compensator subsystem - enables channel-to-channel matching within ±0.5°C without per-channel calibration. Use Value: Factory polarity-matching eliminates worst-case error stacking - reduces post-calibration verification time by >40% in production test. |
Use Scenario: Closed-loop temperature control in aerospace-grade thermal vacuum chambers using Type R thermocouples at extreme ranges (−100°C to +1200°C). IC Role / Device Role / Timing Role: Reference-grade cold-junction compensation - provides stable 5.95µV/°C output for R-type linearization circuitry. Use Value: Compensator temperature error ≤1.5°C over full span - ensures chamber setpoint stability within ±0.3°C at 800°C operating point. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar thermocouple signal conditioning applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC2050IMS8#PBF | Zero-drift op-amp (3µV VOS max) with rail-to-rail I/O; requires external LT1025 and discrete resistor network | Higher design flexibility but increases BOM count and layout complexity; supports wider temp range (–40°C to 125°C) | Choose when system-level calibration is acceptable and extended temperature operation is required |
| MAX31855KASA+ | Integrated thermocouple-to-digital converter with SPI interface; includes cold-junction compensation and linearization in silicon | Replaces analog signal chain with digital output - eliminates analog filtering, trimming, and ADC driver stages | Choose for microcontroller-based systems needing direct digital temperature reads and reduced analog design effort |
Compared with LTK001CN8#PBF, LTC2050IMS8#PBF offers lower offset but demands external compensation and passive components, increasing board area and calibration burden; MAX31855KASA+ simplifies system integration via digital output but lacks the analog precision and DC stability of the matched LTK001CN8#PBF analog front-end.
Availability
LTK001CN8#PBF is available at Aetrix Electronics and suitable for industrial process monitoring, medical temperature sensors, and laboratory data acquisition requiring stable component supply with traceable lot history and long-term lifecycle support.
Supply support for LTK001CN8#PBF 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 its precision analog product lines, including thermocouple interface ICs, with full datasheet, application note, and SPICE model support.
The LTK001CN8#PBF belongs to Linear's legacy thermocouple signal conditioning family, designed specifically for high-accuracy analog temperature measurement systems where DC stability, low drift, and factory-matched performance outweigh digital conversion convenience.
FAQ
What is the operating temperature range for the LTK001CN8#PBF?
The LTK001CN8#PBF is specified for operation from 0°C to 70°C ambient temperature. This range applies to both the integrated amplifier and LT1025-based compensator sections. Storage temperature extends to –65°C to +150°C, and soldering is rated for 300°C for 10 seconds. The LTK001CN8#PBF does not support extended industrial or military temperature grades - those require the obsolete LTK001MJ8 variant.
Does the LTK001CN8#PBF require external calibration for Type K thermocouples?
No, the LTK001CN8#PBF does not require external calibration for basic Type K operation. Its factory-matched amplifier and compensator deliver 0.75°C initial accuracy at 25°C and ≤2.6°C total error over 0–70°C ambient. However, system-level calibration may still be applied to correct for thermocouple wire tolerance, connector effects, or PCB thermal gradients - the LTK001CN8#PBF itself is pre-trimmed and characterized.
Can the LTK001CN8#PBF be used with thermocouple types other than K?
Yes, the LTK001CN8#PBF supports Type E, J, K, T, R, and S thermocouples via dedicated output pins with preset sensitivities (e.g., 60.9µV/°C for E, 5.95µV/°C for R/S). It also provides a scalable 10mV/°C reference output that can be configured with external resistors to match non-standard or custom thermocouple curves - confirmed in the LTK001CN8#PBF datasheet Figure 1 and electrical specifications table.
What is the purpose of Pin 1 (VOS TRIM) on the LTK001CN8#PBF?
Pin 1 on the LTK001CN8#PBF is the amplifier's offset voltage trim terminal. It connects to an external 10kΩ potentiometer (wiper to V–, ends to V+ and V–) to null residual input offset voltage. While the LTK001CN8#PBF is factory trimmed to <35µV, Pin 1 enables fine-tuning for applications demanding sub-0.1°C absolute accuracy - especially important when interfacing with high-resolution ADCs or in multi-channel matched systems.
How does the LTK001CN8#PBF handle cold-junction compensation without self-heating errors?
The LTK001CN8#PBF separates the amplifier and LT1025 compensator onto independent thermal paths within the same package. This physical isolation prevents amplifier supply current (480µA) from heating the compensator die - a key source of warmup drift in monolithic solutions. As stated in the LTK001CN8#PBF datasheet, this architecture "virtually eliminates" compensator temperature rise, enabling stable readings within seconds of power-on.
LTK001CN8#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Series:
- LT®
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Thermocouple Conditioner
- Input Type:
- Voltage
- Output Type:
- Thermocouple
- Current - Supply:
- 800 µA
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
LTK001CN8#PBF FAQ
1.How can I place an order for LTK001CN8#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTK001CN8#PBF 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 LTK001CN8#PBF reliable?
The price and inventory of LTK001CN8#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTK001CN8#PBF is usually 5 days.
3.What payment methods are accepted for LTK001CN8#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTK001CN8#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTK001CN8#PBF?
LTK001CN8#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTK001CN8#PBF 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 LTK001CN8#PBF?
For technical support, including LTK001CN8#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTK001CN8#PBF requirements.
6.How does Aetrix verify that LTK001CN8#PBF is sourced from the original manufacturer or authorized distributors?
All LTK001CN8#PBF 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 LTK001CN8#PBF meets industry standards.
7.What is the process for return or replacement of LTK001CN8#PBF?
All LTK001CN8#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTK001CN8#PBF, 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 LTK001CN8#PBF part is unused and in its original packaging.
Return procedure for LTK001CN8#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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