System Monitors

PJ85451

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Product Description

±1°C Remote and Local Temperature Sensor
with Digital Interface

Product Features

Operation Voltage : 1.7 V to 5.5 V
Average Quiescent Current : 30 μA (Typ.) at 1 con/s, VCC = 3.3 V
ShutdownCurrent : 3.0 μA(Typ.)
Temperature Accuracy without calibration for each channel : ±1°C(Max.) from 0°C to 85°C ±2°C(Max.) from-40°C to 125°C
12-bitADC for 0.0625°C resolution
Support continuous measurement mode or single measurement mode
Series Resistance Cancellation
n-Factor Correction
Compatible with SMBus, 2-wire and I2C interface with speed up to 400 kHz
External Diodes Fault detection
Temperature Range:-40°C to 125°C

Product Introduction

Product Specifications

Consultation List

Product Introduction

The PJ85451 is a 2 channels (1 remote channel + 1 local channel) digital temperature sensor. Temperature data can be read out directly via digital interface (compatible SMBus and I2C with speed up to 400 kHz) by MCU, Bluetooth Chip or SoC chip. Each chip is specially calibrated ±1.0°C (Max.) accuracy for both remote and local channel over 0°C to 85°C temperature range in factory before shipment to customers. It includes a high precision band-gap circuit, a 12-bit analog to digital converter that can offer 0.0625°C resolution, a calibration unit with non volatile memory, and a digital interface block. It has a feature of series resistance cancellation for remote channel. It also has non-ideality factor correction feature for remote channel by programming register. Available Package : DFN2x2-8 package.

Product Specifications

Recommended Operating Conditions

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Parameter
Specification
Supply Voltage
1.7V~5.5V
Operating Ambient temperature
-40°C~125°C

Key Electrical Characteristics , TA = 25°C

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Parameter
Condition
Specification
Supply voltage range
1.7V~5.5V
Temperature Accuracy (Remote Sensor)
TA = 0 to 85°C
±1.0°C
Temperature Accuracy (Remote Sensor)
TA = -40 to 125°C
±2.5°C
Temperature Accuracy (Local Sensor)
TA = 0 to 85°C
±1.0°C
Temperature Accuracy (Local Sensor)
TA = -40 to 125°C
±2.0°C
Average Operating Current
VIN = 3.3 V, 1.0 con/s
35uA
Average Operating Current
VIN = 5.0 V, 1.0 con/s
45uA

DIGITAL INTERFACE , TA = 25°C

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Parameter
Condition
Specification
Logic Input High Voltage
SDA, SCL pin
1.4V~VCC+0.3V
Logic Input Low Voltage
SDA, SCL pin
-0.3V~0.45V
SCL frequency
Fast Mode
400KHz

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