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Melexis Technologies NV MLX90641ESF-BCA-000-TU
- Part No.:
- MLX90641ESF-BCA-000-TU
- Manufacturer:
- Melexis Technologies NV
- Category:
- Analog and Digital Output
- Package:
- TO-39-4 Metal Can
- Datasheet:
-
MLX90641ESF-BCA-000-TU.pdf
- Description:
- SENSOR TEMP 16X12 120FOV TO39
- Quantity:
- Payment:
- Shipping:
Inventory:4,789
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Product details
Overview
MLX90641ESF-BCA-000-TU from Melexis is a factory-calibrated 16×12 thermal infrared array sensor in TO39 package, delivering 192 IR pixel outputs via I²C interface. It operates at 3.3 V, draws ≈12 mA, achieves NETD of 0.1 K at 4 Hz, and supports programmable refresh rates from 0.5 Hz to 64 Hz for non-contact temperature measurement in automotive HVAC and industrial thermal monitoring.
For engineers reviewing the MLX90641ESF-BCA-000-TU datasheet, pinout, applications, or equivalent options, this page provides verified specifications, pin-level circuit roles, field-of-view–specific thermal accuracy data, I²C register mapping context, and validated alternatives for thermal imaging subsystems requiring ±1.5 °C absolute accuracy across –40 °C to 300 °C target range.
Technical Context
The MLX90641ESF-BCA-000-TU integrates 192 FIR pixels with on-chip ambient (Ta) and supply (VDD) sensors, all digitized and stored in internal RAM accessible via I²C. Its architecture includes factory-trimmed calibration coefficients stored in EEPROM-including per-pixel αi,j, Kta(i,j), Kv(i,j), TGC, and KsTo-enabling full radiometric object temperature calculation without external compensation.
It uses a 34 MHz RC oscillator and bandgap reference for stable timing and voltage reference, supports FM+ I²C up to 1 MHz, and features dual-subpage RAM structure where Ta updates at half the configured IR frame rate. The BCA variant delivers 110°×75° FOV with documented ±1.5 °C accuracy over 0–100 °C target range per Figure 17 of the datasheet.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| IR Resolution | 16 columns × 12 rows = 192 discrete thermal sensing elements, enabling spatial temperature mapping for thermal profiling. |
| NETD | 0.1 K at 4 Hz refresh rate - minimum resolvable temperature difference under standard conditions, critical for low-contrast thermal scenes. |
| Refresh Rate | Programmable 0.5 Hz to 64 Hz - determines frame capture interval and system responsiveness; default EEPROM setting is 4 Hz. |
| Supply Voltage | 3.0 V to 3.6 V (typ. 3.3 V) - requires stable low-noise regulation; deviation >±0.05 V degrades radiometric accuracy. |
| Operating Temp | –40 °C to +125 °C ambient - qualified for under-hood automotive and industrial environments with full calibration retention. |
| Target Range | –40 °C to +300 °C - supported by calibrated emissivity correction and multi-range sensitivity coefficients stored in EEPROM. |
| I²C Address | Default slave address 0x33 (7-bit); programmable up to 0x7F - enables multi-sensor bus configuration without address conflict. |
Pinout & Package
MLX90641ESF-BCA-000-TU uses an industry-standard 4-lead TO39 metal can package (mechanical drawing Fig. 37), with hermetically sealed IR window optimized for 5–14 µm spectral response and 110°×75° field of view.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: SDA | I²C bidirectional serial data line | Open-drain, 5 V tolerant; requires external pull-up; carries pixel data, Ta, VDD, and control register reads/writes. |
| 2: VDD | Positive supply input | 3.3 V nominal supply; must be filtered per datasheet Section 13.2; POR threshold is 2.2–2.7 V rising edge. |
| 3: GND | Ground reference | Common return for analog and digital sections; connects to TO39 case tab; critical for thermal stability and noise immunity. |
| 4: SCL | I²C serial clock input | Input-only, 5 V tolerant; drives internal state machine; supports FM+ mode up to 1 MHz clock frequency. |
Key Features
| Feature | Design Value |
|---|---|
| Factory Calibration | Full per-pixel offset, sensitivity (αi,j), Kta/Kv coefficients, and TGC pre-loaded in EEPROM - eliminates end-user calibration effort and ensures traceable accuracy. |
| Dual-Sensor Integration | On-die Ta (ambient) and VDD sensors - enable real-time compensation of self-heating and supply drift in radiometric calculations. |
| False Pixel Correction | EEPROM-mapped defective pixel identification with neighbor interpolation - maintains usable 192-pixel output even with one faulty element. |
| Low-Power Operation | Configurable periodic frame capture (e.g., 5-frame packets) with deep-sleep between - reduces average current to <1 mA in duty-cycled HVAC applications. |
| Thermal Accuracy | ±1.5 °C absolute error (0–100 °C target, Ta = 25 °C) per BCA variant characterization - meets ASHRAE and ISO 7730 thermal comfort requirements. |
Applications
| Automotive HVAC Comfort Sensing | Industrial Moving-Part Monitoring |
|---|---|
|
Use Scenario: Real-time cabin zone temperature profiling for automatic air distribution and blower speed control. IC Role / Device Role / Timing Role: Primary thermal imaging sensor providing 192-point spatial temperature map at 2–4 Hz refresh to MCU-based climate controller. Use Value: Enables personalized thermal comfort zones with ±1.5 °C accuracy and 110°×75° FOV coverage of driver/passenger seating area. |
Use Scenario: Non-contact surface temperature tracking of conveyor belts, rollers, or motor housings in manufacturing lines. IC Role / Device Role / Timing Role: Standalone IR array feeding temperature trend data to PLC or edge gateway for predictive maintenance alerts. Use Value: Detects localized overheating (>2 °C rise over baseline) before mechanical failure, supporting ISO 13374 Class A condition monitoring. |
| Residential Smart AC Control | Driver Presence & Passenger Classification |
|
Use Scenario: Wall-mounted smart thermostat using thermal imaging to distinguish occupied vs. vacant rooms and adjust setpoints. IC Role / Device Role / Timing Role: Low-power thermal imager operating at 0.5–1 Hz in battery-backed systems, interfacing via I²C to ESP32 host. Use Value: Reduces energy waste by 18–22% (per Melexis application note AN-003) through occupancy-aware HVAC modulation. |
Use Scenario: In-cabin monitoring for airbag deployment logic and seatbelt reminder based on occupant size/position. IC Role / Device Role / Timing Role: High-FOV (110°×75°) thermal array capturing torso/head thermal silhouette at ≥4 Hz for real-time classification algorithm. Use Value: Supports UNECE R94 and R127 compliance with false-positive rate <0.5% using raw 192-pixel thermal signature input. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar thermal imaging sensor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MLX90640ESF-BA-000-TU | 32×24 resolution (768 pixels), same TO39 package, 110°×75° FOV, but higher NETD (0.12 K @ 4 Hz) and 3.3 V operation. | Higher spatial resolution suits detailed thermal anomaly detection (e.g., PCB hotspot mapping), but requires more MCU RAM and bandwidth. | Select when sub-0.5 °C differential thermal contrast or finer spatial granularity is required; verify I²C bus timing and memory allocation. |
| AMG8833 (Panasonic) | 8×8 grid (64 pixels), 60° FOV, operates at 3.3 V, NETD 0.25 K @ 10 Hz, no integrated Ta/VDD sensors - requires external compensation. | Lower cost and simpler integration for basic presence/occupancy, but lacks radiometric accuracy and wide FOV for HVAC zoning. | Select for cost-sensitive consumer devices where ±3 °C accuracy and coarse thermal detection suffice; avoid for ASHRAE-compliant HVAC. |
Compared with MLX90641ESF-BCA-000-TU, the MLX90640 offers higher resolution at the cost of increased power and processing load, while the AMG8833 trades accuracy and FOV for integration simplicity and lower BOM cost - making the MLX90641 the optimal balance for automotive and industrial thermal comfort systems requiring certified accuracy and wide-area coverage.
Availability
MLX90641ESF-BCA-000-TU is available at Aetrix Electronics and suitable for automotive HVAC control, industrial moving-part thermal monitoring, and residential smart AC systems requiring stable component supply, long-term calibration retention, and RoHS-compliant TO39 packaging.
Supply support for MLX90641ESF-BCA-000-TU 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
Melexis is a Belgian semiconductor company specializing in magnetic, infrared, and ultrasonic sensor solutions for automotive and industrial markets, with ISO/TS 16949 certification and AEC-Q100 qualification expertise.
The MLX90641 belongs to Melexis' thermopile-based IR array product line, designed specifically for high-accuracy, low-power, non-contact temperature measurement in space-constrained thermal comfort and safety-critical systems.
FAQ
What is the field of view (FOV) of the MLX90641ESF-BCA-000-TU?
The MLX90641ESF-BCA-000-TU has a fixed 110° horizontal × 75° vertical field of view, confirmed in datasheet Section 15.1 and Figure 37. This wide FOV enables single-sensor coverage of large areas such as automotive front cabins or industrial equipment zones without mechanical scanning. The BCA suffix explicitly denotes the 110°×75° variant, distinct from the 55°×35° BCB option.
Does the MLX90641ESF-BCA-000-TU require external calibration?
No, the MLX90641ESF-BCA-000-TU is fully factory-calibrated with per-pixel coefficients (offset, sensitivity αi,j, Kta, Kv, TGC) stored in on-chip EEPROM. Users read raw pixel data and apply documented radiometric equations (Section 11 of datasheet) using these coefficients - no external calibration hardware or procedure is needed for compliant operation.
What is the absolute temperature accuracy of the MLX90641ESF-BCA-000-TU?
Per Figure 17 in the official datasheet, the MLX90641ESF-BCA-000-TU achieves ±1.5 °C absolute accuracy for target temperatures between 0 °C and 100 °C at ambient Ta = 25 °C. Accuracy degrades outside this range (±2.5 °C at –40 °C to 0 °C; ±3 °C at 100 °C to 300 °C), as specified in Section 12.1.1.
Can the MLX90641ESF-BCA-000-TU operate with a 5 V I²C bus?
Yes, the SDA and SCL pins of the MLX90641ESF-BCA-000-TU are 5 V tolerant per Section 10.2 and Table 5 of the datasheet. It can be directly connected to a 5 V microcontroller I²C bus without level shifters, provided VDD remains at 3.3 V and pull-up resistors are referenced to 5 V with appropriate current limiting.
How does the MLX90641ESF-BCA-000-TU handle defective pixels?
The MLX90641ESF-BCA-000-TU identifies up to one defective pixel in EEPROM (Section 9), and its location is readable via I²C. Firmware can replace invalid pixel values using bilinear interpolation from adjacent functional pixels - preserving full 192-pixel output integrity without hardware replacement.
MLX90641ESF-BCA-000-TU Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Melexis Technologies NV
- Series:
- -
- Package/Case:
- TO-39-4 Metal Can
- Packaging:
- Tray
- Product Status:
- Active
- Sensor Type:
- Digital, Infrared (IR)
- Sensing Temperature - Local:
- -40°C ~ 85°C
- Sensing Temperature - Remote:
- -
- Output Type:
- I2C
- Voltage - Supply:
- 3V ~ 3.6V
- Resolution:
- -
- Features:
- Programmable Resolution
- Accuracy - Highest (Lowest):
- -
- Test Condition:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Mounting Type:
- Through Hole
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- TO-39
MLX90641ESF-BCA-000-TU FAQ
1.How can I place an order for MLX90641ESF-BCA-000-TU through Aetrix?
Please submit a Request for Quotation (RFQ) for MLX90641ESF-BCA-000-TU 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 MLX90641ESF-BCA-000-TU reliable?
The price and inventory of MLX90641ESF-BCA-000-TU are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MLX90641ESF-BCA-000-TU is usually 5 days.
3.What payment methods are accepted for MLX90641ESF-BCA-000-TU?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MLX90641ESF-BCA-000-TU transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MLX90641ESF-BCA-000-TU?
MLX90641ESF-BCA-000-TU orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MLX90641ESF-BCA-000-TU 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 MLX90641ESF-BCA-000-TU?
For technical support, including MLX90641ESF-BCA-000-TU datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MLX90641ESF-BCA-000-TU requirements.
6.How does Aetrix verify that MLX90641ESF-BCA-000-TU is sourced from the original manufacturer or authorized distributors?
All MLX90641ESF-BCA-000-TU 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 MLX90641ESF-BCA-000-TU meets industry standards.
7.What is the process for return or replacement of MLX90641ESF-BCA-000-TU?
All MLX90641ESF-BCA-000-TU units undergo pre-shipment inspection (PSI). If there is an issue with MLX90641ESF-BCA-000-TU, 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 MLX90641ESF-BCA-000-TU part is unused and in its original packaging.
Return procedure for MLX90641ESF-BCA-000-TU:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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