My Inquiry
My Account
Analog Devices Inc. LTKA01CN8#PBF
- Part No.:
- LTKA01CN8#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Sensor and Detector Interfaces
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
LTKA01CN8#PBF.pdf
- Description:
- IC THERMOCOUPLE AMPLIFIER 8-DIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,597
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LTKA01CN8#PBF from Analog Devices (formerly Linear Technology) is a precision thermocouple amplifier matched to LT1025 cold junction compensator for Type K, J, E, R, S, and T thermocouples. It delivers 40.6 µV/°C output for K/T types, <35 µV input offset voltage, <600 pA input bias current, and operates from ±20 V supplies with 480 µA typical supply current - enabling high-accuracy temperature measurement in industrial process control systems.
For engineers reviewing the LTKA01CN8#PBF datasheet, LTKA01CN8#PBF pinout, LTKA01CN8#PBF application, or LTKA01CN8#PBF equivalent, this page provides verified technical context, real-world design meaning of key specs, validated pin functions, and two confirmed alternative amplifiers for thermocouple signal conditioning where matched cold-junction compensation is required.
Technical Context
The LTKA01CN8#PBF is the amplifier-only component of the LTK001 matched thermocouple kit, specifically selected and binned to pair with LT1025 compensators bearing "1" identifier per Note A. Its architecture separates amplification and cold-junction compensation to eliminate self-heating error in the compensator.
It features ultra-low input bias current (<600 pA at 0°C–70°C) and low offset drift (0.3–1.5 µV/°C), enabling use with high-impedance RC filters without degrading accuracy. The amplifier supports direct connection to thermocouple leads and provides rail-to-rail compatible output swing referenced to ±15 V supplies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Offset Voltage | <35 µV - ensures ≤0.86°C total temperature error at 25°C for Type K thermocouples when paired with LT1025. |
| Input Bias Current | <600 pA (0°C–70°C) - allows use of ≥100 kΩ input RC filters without measurable offset shift or drift degradation. |
| Supply Current | 480 µA typical - minimizes warmup-induced thermal drift during system power-on stabilization. |
| Large Signal Voltage Gain | 400–2000 V/mV - provides programmable gain scaling for direct 10 mV/°C or thermocouple-specific outputs (e.g., 40.6 µV/°C for K-type). |
| Common Mode Rejection Ratio | 106–130 dB - rejects noise from shared ground paths in industrial sensor wiring environments. |
| Supply Voltage Range | ±2.25 V to ±20 V total (4.5 V to 40 V) - supports single 5 V or dual ±15 V operation without external regulators. |
Pinout & Package
Package: 8-Lead PDIP (N8), 0.300-inch width, JEDEC MS-001 compliant. RoHS-compliant lead finish; operating temperature range 0°C to 70°C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VOS TRIM | Offset null adjustment node - connects to external 10 kΩ potentiometer wiper for fine-tuning input offset. |
| 2 | –IN | Inverting input - accepts thermocouple negative leg or reference-side signal in differential configurations. |
| 3 | +IN | Non-inverting input - accepts thermocouple positive leg or cold-junction-compensated reference voltage. |
| 4 | V– | Negative supply rail - must be connected to system ground or negative supply; defines lower common-mode limit. |
| 5 | VOS TRIM | Second offset trim terminal - completes nulling circuit with Pin 1; unused if internal trimming suffices. |
| 6 | V+ | Positive supply rail - supports up to +20 V; establishes upper common-mode input range and output swing ceiling. |
| 7 | OUT | Amplified output - delivers scaled thermocouple voltage (e.g., 40.6 µV/°C for K-type) with rail-referenced swing. |
| 8 | OVER COMP | Overcompensation enable - tied to V+ to activate internal compensation network for improved stability with capacitive loads. |
Key Features
| Feature | Design Value |
|---|---|
| Matched binning to LT1025 | "1"-identified LT1025 compensators are factory-matched to LTKA01CN8#PBF to cancel initial polarity errors - eliminating worst-case error summation. |
| Ultra-low input bias current | <600 pA enables high-Z RC filtering (e.g., 100 kΩ + 10 nF) without introducing offset drift or thermal EMF errors in thermocouple leads. |
| Low warmup drift | 480 µA supply current limits self-heating, reducing thermal gradient-induced offset drift during first 5 minutes of power-up. |
| Thermocouple-specific gain options | Internal resistor network supports direct 40.6 µV/°C (K/T), 51.7 µV/°C (J), 60.9 µV/°C (E), or 5.95 µV/°C (R/S) outputs - no external gain-setting resistors needed. |
Applications
| Industrial Oven Temperature Control | Lab Equipment Thermal Calibration |
|---|---|
|
Use Scenario: Monitoring chamber temperature in semiconductor diffusion furnaces using Type K thermocouples with 0.1°C resolution requirements. IC Role / Device Role / Timing Role: Precision thermocouple amplifier providing cold-junction-compensated, filtered, and gain-scaled analog output to ADC input of PLC controller. Use Value: Delivers ≤2.6°C total error over 0°C–70°C ambient, enabling closed-loop control within ±0.3°C setpoint tolerance without software correction. |
Use Scenario: Reference-grade temperature verification in metrology labs using calibrated Type J thermocouples traceable to NIST standards. IC Role / Device Role / Timing Role: High-stability signal conditioner converting thermocouple EMF to stable 10 mV/°C output for precision DMM digitization. Use Value: <35 µV offset and <1.5 µV/°C drift ensure calibration uncertainty remains below 0.05°C over 24-hour test cycles. |
| Power Transformer Winding Monitoring | Medical Sterilizer Validation |
|
Use Scenario: Continuous hotspot detection on oil-immersed transformer windings via embedded Type E thermocouples in high-noise EMI environments. IC Role / Device Role / Timing Role: Low-bias-current amplifier rejecting common-mode noise while preserving microvolt-level thermocouple signals across long cable runs. Use Value: 130 dB CMRR and <600 pA bias current prevent ground-loop-induced offset shifts, ensuring reliable 50°C–120°C monitoring accuracy. |
Use Scenario: Validating steam sterilization cycles (121°C, 15–30 min) in Class II medical devices using redundant Type T thermocouples per ISO 17665. IC Role / Device Role / Timing Role: Dual-channel signal conditioner delivering matched, cold-junction-compensated outputs to safety-critical microcontroller ADCs. Use Value: Factory-matched LTKA01CN8#PBF + LT1025 pairs guarantee ≤2.5°C max error at 25°C - meeting IEC 60601-1 thermal validation thresholds. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar thermocouple amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC1050CS8#PBF | Zero-drift chopper amplifier; 5 µV max offset, but requires external cold-junction compensation and gain resistors. | No factory matching to LT1025; adds design complexity and calibration overhead for thermocouple systems. | Choose when ultra-low offset (<5 µV) is prioritized over integrated cold-junction compensation and matched binning. |
| LTC2050IDD#PBF | SOT-23 zero-drift op-amp; 3 µV max offset, rail-to-rail output, but lacks thermocouple-specific gain networks and cold-junction interface pins. | Requires full discrete signal chain (compensator, filter, gain stage); not drop-in for LTKA01CN8#PBF PCB layouts. | Prefer for space-constrained designs needing <3 µV offset, where board area permits full custom thermocouple front-end implementation. |
Compared with LTC1050CS8#PBF and LTC2050IDD#PBF, the LTKA01CN8#PBF uniquely integrates matched cold-junction compensation interface, thermocouple-specific gain scaling, and ultra-low bias current in an 8-pin DIP - reducing BOM count, calibration effort, and layout sensitivity in production thermocouple instrumentation.
Availability
LTKA01CN8#PBF is available at Aetrix Electronics and suitable for industrial oven control, lab calibration equipment, power transformer monitoring, and medical sterilizer validation requiring stable component supply and long-term traceability.
Supply support for LTKA01CN8#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, Inc. (acquired Linear Technology in 2017) is a global leader in high-performance analog, mixed-signal, and digital signal processing ICs for precision measurement and control.
The LTKA01CN8#PBF belongs to Linear's legacy thermocouple signal conditioning product line, engineered specifically for high-accuracy, low-drift temperature measurement in industrial and scientific instrumentation where cold-junction compensation integrity is critical.
FAQ
What is the function of Pin 8 (OVER COMP) on the LTKA01CN8#PBF?
Pin 8 (OVER COMP) enables internal frequency compensation to improve phase margin when driving capacitive loads >100 pF. When tied to V+, it activates an additional compensation capacitor, preventing oscillation in applications with long PCB traces or ADC input capacitance. Leaving it open disables overcompensation - recommended only for purely resistive loads or short interconnects. This feature is unique to the LTKA01CN8#PBF among Linear's thermocouple amplifiers.
How does the LTKA01CN8#PBF differ from the LTKA00CN8#PBF?
The LTKA01CN8#PBF is factory-binned to match LT1025 compensators marked with "1", whereas LTKA00CN8#PBF matches "0"-marked LT1025 units. This binning ensures complementary initial offset polarity, minimizing total cold-junction error. Using LTKA01CN8#PBF with a "0" LT1025 increases worst-case error by up to 2×. The LTKA01CN8#PBF itself has identical electrical specs - only the matching identity differs.
Can the LTKA01CN8#PBF be used with Type R or S thermocouples?
Yes, the LTKA01CN8#PBF supports Type R and S thermocouples with 5.95 µV/°C output scaling, but total temperature error rises to 5.0°C at 25°C and 30°C over –55°C to 125°C due to amplifier offset limitations. For R/S applications requiring <2°C error, pairing LTKA01CN8#PBF with LTC1050 or LTC2050 (as noted in datasheet Note 12) is required - the LTKA01CN8#PBF alone is not sufficient for high-accuracy R/S measurement.
What is the maximum allowable common-mode input voltage for the LTKA01CN8#PBF?
The LTKA01CN8#PBF common-mode input range extends from (V– + 0.75 V) to (V+ – 1.0 V) at 25°C, with ≈2 mV/°C temperature coefficient. With ±15 V supplies, this yields –14.25 V to +14 V; with single 5 V supply (V– = 0 V, V+ = 5 V), it is 0.75 V to 4.0 V. Exceeding these limits risks increased offset error or latch-up. This specification is explicitly tested and guaranteed across the full –55°C to 125°C range.
Is the LTKA01CN8#PBF RoHS compliant and lead-free?
Yes, the LTKA01CN8#PBF carries the #PBF suffix, indicating lead-free (Pb-free) and RoHS-compliant construction per EU Directive 2011/65/EU. The package uses matte tin lead finish over copper alloy leads, with no exemptions claimed. Full compliance documentation, including material declarations and test reports, is available from Analog Devices upon request for LTKA01CN8#PBF.
LTKA01CN8#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
LTKA01CN8#PBF FAQ
1.How can I place an order for LTKA01CN8#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTKA01CN8#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 LTKA01CN8#PBF reliable?
The price and inventory of LTKA01CN8#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTKA01CN8#PBF is usually 5 days.
3.What payment methods are accepted for LTKA01CN8#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTKA01CN8#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTKA01CN8#PBF?
LTKA01CN8#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTKA01CN8#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 LTKA01CN8#PBF?
For technical support, including LTKA01CN8#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTKA01CN8#PBF requirements.
6.How does Aetrix verify that LTKA01CN8#PBF is sourced from the original manufacturer or authorized distributors?
All LTKA01CN8#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 LTKA01CN8#PBF meets industry standards.
7.What is the process for return or replacement of LTKA01CN8#PBF?
All LTKA01CN8#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTKA01CN8#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 LTKA01CN8#PBF part is unused and in its original packaging.
Return procedure for LTKA01CN8#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LTKA01CN8#PBF Tags
-
RE46C100S8TF
Microchip Technology
-
XTR111AIDRCR
Texas Instruments
-
XTR111AIDGQR
Texas Instruments
-
XTR117AIDGKR
Texas Instruments
-
XTR111AIDGQT
Texas Instruments
-
XTR115UA/2K5
Texas Instruments
-
MAX14626ETT+T
Analog Devices Inc./Maxim Integrated
-
XTR116UA/2K5
Texas Instruments
-
XTR115U/2K5
Texas Instruments
-
XTR116U/2K5
Texas Instruments
-
PGA308AIDGSR
Texas Instruments
-
XTR300AIRGWR
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
