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SA56004EDP

NXP dual-channel I2C temp sensor, plus/minus 1C accuracy, local+remote, HVSON-8, dual alarm

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Pieza del fabricante：

SA56004EDP

Paquete：

HVSON-8 (3mm x 3mm, DP suffix)

Marca：
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Compromiso de calidad
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Descripción

Productos

The SA56004EDP from NXP is a dual-channel I2C/SMBus digital temperature sensor that simultaneously measures local die temperature and remote junction temperature using an external PNP transistor or diode. With plus/minus 1C accuracy over the 25C~125C range and 11-bit (0.125C) resolution, it provides precise thermal monitoring for CPUs, ASICs, and power modules.

Especificaciones

Local Temp Accuracy plus/minus 1C (25C~125C)
Remote Temp Accuracy plus/minus 1C (60C~125C)
Resolution 11-bit (0.125C default), configurable 12-bit (0.0625C)
Temperature Range -40C ~ +125C
Interface I2C/SMBus (100kHz, 400kHz)
Tensión de alimentación 2.7V ~ 5.5V
Operating Current 1.0mA typical
Shutdown Current 3uA typical
Conversion Time 80ms (11-bit), 160ms (12-bit)

Características

  • Dual-channel: local die and remote diode temperature measurement
  • Plus/minus 1C accuracy for both channels in the critical range
  • Two open-drain alarm outputs (OS# and THERM#) for thermal management
  • Programmable temperature thresholds with hysteresis
  • SMBus timeout compatibility for bus lock-up recovery
  • Compact HVSON-8 (3mm x 3mm) package

Aplicaciones

  • CPU and GPU thermal throttling control
  • ASIC and FPGA junction temperature monitoring
  • Power module and voltage regulator thermal protection
  • Industrial equipment over-temperature alarm
  • Server and datacenter thermal management

The SA56004EDP from NXP Semiconductors is a dual-channel digital temperature sensor that communicates via I2C or SMBus interface. It simultaneously measures the local die temperature and the remote junction temperature of an external PNP transistor or diode-connected transistor (2N3906 recommended). The device provides plus/minus 1C accuracy for both the local and remote channels in the critical 25C to 125C range, with a remote accuracy of plus/minus 3C across the full -40C to +125C range. The default 11-bit resolution (0.125C) can be increased to 12-bit (0.0625C) for finer temperature granularity. Two independent open-drain alarm outputs (OS# and THERM#) enable flexible thermal management: OS# for software-polled over-temperature alerts, and THERM# for hardware-based thermal throttling or shutdown. Programmable threshold and hysteresis registers allow the alarm behavior to be tailored to the specific thermal management requirements of the system.

The SA56004EDP measures temperature using the ratio of forward voltage drops across a diode-connected PNP transistor at two different bias currents. The remote sensor circuit applies a high current (Ihigh) and a low current (Ilow) alternately to the external transistor and measures the resulting forward voltage difference, which is proportional to absolute temperature (PTAT). This delta-VBE measurement cancels out the transistor-specific forward voltage, making the reading independent of the individual transistor characteristics. The same principle is applied to an internal diode for local temperature measurement. The analog measurement is digitized by a delta-sigma ADC with 11-bit or 12-bit resolution. The I2C/SMBus interface provides read access to the temperature registers and write access to the configuration, threshold, and hysteresis registers. The OS# and THERM# comparators continuously compare the measured temperatures against the programmed thresholds and assert the alarm outputs when limits are exceeded.

Pin Nombre Función
1 D- Remote Sensor Negative Terminal
2 D+ Remote Sensor Positive Terminal
3 VCC Power Supply (2.7V~5.5V)
4 GND Suelo
5 SDA I2C Data I/O
6 SCL I2C Clock Input
7 OS# Over-Temperature Alarm (open-drain)
8 THERM# Thermal Shutdown Alarm (open-drain)
  • CPU thermal throttling: Monitor CPU die temperature via embedded thermal diode and trigger clock throttling on THERM#
  • ASIC/FPGA monitoring: Track junction temperature of high-power FPGAs using the remote diode channel for reliable operation
  • Power module protection: Measure the temperature of DC-DC converter MOSFETs and inductors using external sensor diodes
  • Industrial equipment: Provide over-temperature alarms for motor drivers, power electronics, and control cabinets
  • Server thermal management: Monitor multiple hotspots across server boards with daisy-chained SA56004 devices on SMBus
Modelo Marca Canales Accuracy Interface
SA56004BDP NXP 2 plus/minus 3C I2C
LM95235CISD TI 2 plus/minus 1C SMBus
ADM1032ARQZ ADI 2 plus/minus 1C SMBus
MAX6649AEE+ ADI 2 plus/minus 1C SMBus
NCT72DMNR2G onsemi 2 plus/minus 1C SMBus
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