2-Terminal, High-Precision,Current Output Temperature Sensor Integrated Circuit IC
The SGM446 is a 2-terminal temperature sensor withan output current proportional to absolute temperature.It can be considered as a constant-current andhigh-impedance regulator passing 1μA/K in the supplyvoltage range from 4V to 35V. The SGM446 iscalibrated to 298.2μA output current at 298.2K (+25℃).Compared with the traditional electrical temperaturesensor, the SGM446 does not need resistancemeasurement circuit, linearization circuit, precisionvoltage amplifier and cold junction compensation. Italso integrates the compensation of temperature, flowrate measurement, discrete-component correlation,biasing proportional to absolute temperature, leveldetection of fluids and anemometry.The high-impedance current output of the SGM446makes the device insensitive to voltage dropsespecially on long lines. Therefore, it is particularlysuitable for remote sensing applications. The multiplexof the SGM446 is achieved by switching the currentthrough a CMOS multiplexer or switching the supplyvoltage through the logic gate.The SGM446 is available in Green UTDFN-2×2-2L andUTDFN-2×2-4L packages. It is specified over a widetemperature range of -55℃ to +150℃.
Key Features
● 2-Terminal Device: Voltage to Current
● Linear Current Output: 1µA/K
● Calibration Error: ±2℃
● Excellent Linearity: ±0.6℃ over Full TemperatureRange
● Wide Supply Voltage Range: 4V to 35V
● Operating Temperature Range: -55℃ to +150℃
● Available in Green UTDFN-2×2-2L andUTDFN-2×2-4L Packages
Applications
Temperature Sensing and Compensation
Industrial Temperature Measurement
Thermocouple Cold Junction Compensation
Remote Temperature Sensing
Pin Configurations
Pin Description
Product Selection Guid
| Device Type | Part Number | | Vcc (V) | Temp Resolution Max (Bits) | Local Sensor Accuracy | | | Quiescent | Operating | | | Features |
| Local and Remote | SGM446 | Analog Output | 4~35 |
| -55℃ to +150℃: -5~2 |
|
| 298.2 | -55℃ to +150 | 0 | UTDFN-2×2-2L,UTDFN-2×2-4L | 2-Terminal, High-Precision, Current Output Temperature Sensor |
| Loca | SGM447 | Analog Output | 1.5~5.5 |
| -20℃ to +85℃: 2.5 -55℃ to +150℃: 3.5 |
|
| 3 | -55℃ to +150 | 0 | WLCSP-0.8×0.8-4B-A | Dual-Gain Analog Temperature Sensor with Class-AB Output |
| Local and Remote | SGM448 | Analog Output | 2.7~10 |
| |
|
| 26 | -55℃ to +150 | 0 | SOT-23 | Low Power, High Accuracy Analog Output Temperature Sensor |
| Local and Remote | SGM449 | Analog Output | 2.7~10 |
| +25℃: 1 |
|
| 26 | -55℃ to +150 | 0 | SOT-23 | Low Power, High Accuracy Analog Output Temperature Sensor |
| Loca | SGM450 | Analog Output | 2.3~5.5 |
| -40℃ to +150℃: 2 |
|
| 7.5 | -40℃ to +150 | 0 | SC70-5,SOT-23 | Low Power, High Accuracy Analog Output Temperature Sensor |
| Local and Remote | SGM451 | I2C and SMBus | 3.0~5.5 | 12 | -40℃ to +85℃: 0.8 -40℃ to +125℃: 1.2 | <10 | 8 | 122 | -40℃ to +125 | 1 | TDFN-2×2-8BL | ±1℃ Local and Remote Temperature Sensor with η-Factor and Offset Correction, Series-Resistance Cancellation, and Programmable Digital Filter
|
| Loca | SGM452 | | 2.7~5.5 | 12 | -40℃ to +85℃: 1 -55℃ to +125℃: 1.2 | <3 | 8 | 49 | -55℃ to +125 | 0 | SOIC-8,MSOP-8 | Digital Temperature Sensor and Thermal Watchdog with I 2C Interface |
| Loca | SGM457 | | 1.6~5.5 | 12 | -40℃ to +125℃: 2 | <2.5 | 8 | 14 | -40℃ to +150 | 0 | SOT-563-6 | Low Power, Low Supply Voltage Digital Temperature Sensor |
| Loca | SGM458 | I2C and SMBus | 1.6~5.5 | 12 | -55℃ to +125℃: 1 | <2.5 | 8 | 2.9 | -55℃ to +125 | 0 | WLCSP-0.85×0.85-4B | Low Power, Low Supply Voltage Digital Temperature Sensor |
| Loca | SGM459 | I2C | 2.7~5.5 | 12 | -55℃ to +125℃: 1.2 | <3 | 8 | 49 | -55℃ to +125 | 0 | TDFN-2×2-8AL | Digital Temperature Sensor and Thermal Watchdog with I 2C Interface |
| Loca | SGM460 | I2C and SMBus | 1.6~5.5 | 12 | -40℃ to +125℃: 0.75 | <1 | 8 | 3.2 | -40℃ to +125 | 0 | WLCSP-0.77×1.17-6B | Low Power, Digital Temperature Sensor with Two-Wire Serial Interface |
Integrated circuits (ICs) serve as the foundation of modern electronics, offering small size, low power consumption, strong performance and high reliability. They are widely used in consumer electronics, industrial applications, communications, automotive electronics, medical equipment, and aerospace/defense systems.
Uchi Electronics provides high-performance analog and mixed-signal processing solutions for industrial automation, new energy, automotive, communications, computing, consumer electronics and medical equipment applications.
This solution demonstrates the integrated circuit application of temperature transmitters . For assistance selecting the right product, please contact our technical support team.
