Overview
The TMP421AIDCNT is a remote and local temperature sensor produced by Texas Instruments. This device is part of the TMP421 series, which includes the TMP421, TMP422, and TMP423 models. The TMP421AIDCNT combines a local die temperature measurement channel with a remote junction temperature measurement channel, making it versatile for various applications. It is available in an 8-pin SOT-23 (DCN) package and is RoHS compliant, ensuring environmental sustainability. Although the TMP421AIDCNT is no longer in production, it remains relevant for existing designs and can be replaced with alternative products in new designs.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Package Type | SOT-23 (DCN) | - |
| Pins | 8 | - |
| Operating Temperature Range | -40 to 125 | °C |
| Supply Voltage (Min) | 2.7 | V |
| Supply Voltage (Max) | 5.5 | V |
| Supply Current (Typ) | 400 | μA |
| Local Sensor Accuracy (Max) | ±1.5 | °C |
| Remote Sensor Accuracy (Max) | ±1 | °C |
| Remote Diode Temp Range for Listed Accuracy | -40 to 150 | °C |
| Remote Temp Resolution (Max) | 12 bits | - |
| Interface | I2C, SMBus | - |
Key Features
- Series Resistance Cancellation and n-Factor Correction: Automatically cancels series resistance and corrects for non-ideality factors, ensuring accurate temperature measurements.
- Two-Wire/SMBus Serial Interface: Supports SMBus write byte, read byte, send byte, and receive byte commands for device configuration.
- Multiple Interface Addresses: Allows multiple devices to be connected on the same bus.
- Diode Fault Detection: Detects faults in the remote diode, enhancing reliability.
- Shutdown Feature: Reduces power consumption when not in use.
- RoHS Compliant and No Sb/Br: Environmentally friendly and compliant with RoHS standards.
Applications
- Processor/FPGA Temperature Monitoring: Ideal for monitoring temperatures in microprocessors, microcontrollers, and FPGAs.
- Servers and Central Office Telecom Equipment: Used in server systems and central office telecom equipment for temperature monitoring.
- Storage Area Networks (SAN): Employed in storage area networks to ensure optimal operating temperatures.
- LCD/DLP®/LCOS Projectors: Utilized in display technologies for temperature monitoring and control.
Q & A
- What is the operating temperature range of the TMP421AIDCNT?
The operating temperature range is -40°C to 125°C.
- What is the accuracy of the local temperature sensor?
The local temperature sensor accuracy is ±1.5°C).
- What is the remote temperature measurement range?
The remote temperature measurement range is -40°C to 150°C).
- Does the TMP421AIDCNT support SMBus interface?
Yes, it supports SMBus and I2C interfaces).
- What is the typical supply current of the TMP421AIDCNT?
The typical supply current is 400 μA).
- Is the TMP421AIDCNT RoHS compliant?
Yes, it is RoHS compliant and free of Sb/Br).
- What is the resolution of the remote temperature measurement?
The resolution is up to 12 bits).
- Does the TMP421AIDCNT have a shutdown feature?
Yes, it has a shutdown feature to reduce power consumption when not in use).
- What types of packages are available for the TMP421AIDCNT?
The TMP421AIDCNT is available in SOT-23 (DCN) and DSBGA (WCSP) packages).
- Is the TMP421AIDCNT still in production?
No, the TMP421AIDCNT is no longer in production and new designs should consider alternative products).
