Temperature Sensor Chip Mysentech M1820W with Single GPIO Port Communication and

Product Specification

Product Overview

The M601, M1601, and M1820 series are high-precision digital-analog mixed-signal temperature sensing chips. They offer exceptional accuracy up to 0.1 without user calibration. Based on CMOS semiconductor PN junction temperature and bandgap voltage characteristics, these chips feature small-signal amplification, analog-to-digital conversion, and digital calibration compensation for digital bus output. Key advantages include high precision, good consistency, fast temperature measurement, low power consumption, flexible programmable configuration, and long lifespan. With a built-in 16-bit ADC, they provide a resolution of 0.004C and operate across an ultra-wide temperature range of -70C to +150C. Each chip has a unique 64-bit ID serial number, factory tested and calibrated, with internal automatic compensation. The single-bus protocol simplifies system integration, requiring only one GPIO port for communication. This interface supports multi-node sensing and networking for cost-effective, long-distance, high-node-count distributed sensing, capable of networking up to 100 nodes in series over 100 to 500 meters. Non-volatile E2PROM stores chip ID, alarm thresholds, calibration values, and user-defined information. The M601 series also includes an ALERT alarm indicator pin for hardware alarm expansion.

Key applications include smart wearables, electronic thermometers, animal temperature monitoring, medical electronics, cold chain logistics and storage, smart home devices, and thermal, gas, and water meters, serving as replacements for PT100/PT1000 sensors.

Product Attributes

• Brand: mysentech
• Communication Protocol: Single-bus

Technical Specifications

General Specifications:

• Temperature Error: 0.1C (specific ranges), 1.5C (-55C to +125C), 2C (-70C to +150C)
• Repeatability: Low (0.07C), Medium (0.05C), High (0.03C)
• Configurable Temperature Conversion Time: 10.5ms/5.5ms/4ms
• Programmable Temperature Alarms
• 32-bit Additional E2PROM Space for User Information
• Unique 64-bit ID Serial Number for Multi-point Networking Addressing
• Standard Single-Bus Interface
• Non-volatile E2PROM Storage

Absolute Maximum Ratings:

• Supply Voltage (VDD): -0.3 to 6 V
• Maximum Voltage on Pins: -0.3 to 6 V
• Input Current on Pins: 100 mA
• Operating Temperature Range: -70 to 150 C
• Storage Temperature Range: -70 to 150 C
• ESD (HBM): 8 kV

Electrical Characteristics:

• Idle State (Standby Current): 0.1A (typical)
• Idle State (Periodic Measurement): 55A (typical)
• Power-on Wait Time: 2ms (typical)
• Input Logic Low (VIL): 0.3*VDD (max)
• Input Logic High (VIH): 0.7*VDD (min)
• Output Low Voltage (VOL): 0.4 V (at IOL = -3 mA)
• Input Leakage Current: 0.1 A (max)
• Alarm Output Drive Strength: 1 mA (at VDD=5V)
• Pull-up Resistor (Rup): 1 k to 4.7 k (recommended)

Non-Volatile Memory Characteristics:

• Write Cycle (tWR): 40 ms (max)
• E2PROM Write Cycles (NEEWR): 50,000 cycles (-55C to +55C)
• E2PROM Data Retention (tEEDR): 10 years (-55C to +55C)