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PJ79818

Signal Chain ICs

PJ79818

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Product Description

Current and Power Monitor with I2C Compatible Interface

Product Features

Operation Voltage: 3V to 5.5V
12Bit Resolution Delta-Sigma ADC
Local Temperature Accuracy:(-25°C to 100°C) ±1°C(Max.) , (-40°C to 125°C) ±1.5°C(Max.)
2.56V Internal VREF or Variable External VREF
WATCHDOG Window ComparatorswithStatus and Mask Registers of All MeasuredValues
Independent Registers for StoringMeasuredValues
INT Output Notifies Microprocessor of ErrorEvent
I2C/SMBus Serial Bus Interface Compatibility: 9 Selectable Addresses , TIME-OUT Reset Function to Prevent I2CBusLock-Up
Individual Channel ShutdowntoLimit PowerConsumption
Deep Shutdown Mode to MinimizePowerConsumption
Temperature Range: -40°Cto125°C

Applications

Communications Infrastructure Thermal and Hardware Server Monitors System Monitors Industrial and Medical System

Product Introduction

Product Specifications

Related Files
Consultation List

Product Introduction

PJ79818 is a system monitor chip with I2C interface. The PJ79818 include a local temperature sensor, 8-channel analog input. An onboard temperature sensor, combined with WATCHDOG window ____ comparators, and an interrupt output pin INT allow easy monitoring and out-of-range alarms for every channel. A high performance internal reference is also available to provide for a complete solution in the most difficult operating conditions. Analog input can be used for voltage monitor, like connecting analog output temperature sensor or monitor power supply voltage. The PJ79818 supports standard mode ( 100kHz) and fast mode (400kHz) I2C interface. Available Package: TSSOP-16P package

Product Specifications

Recommended Operating Conditions

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Parameter
Symbol
Min
Max
Unit
Supply Voltage
VCC
3
5.5
V
Voltage on SCL, SDA, A1, A0 , nINT
-
-0.05
5.5
V
Operation Temperature Range
TA
-40
125
°C

Absolute Maximum Ratings

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Parameter
Symbol
Value
Unit
Supply Voltage
VCC to GND
-0.3 to 6.0
V
SDA, SCL, A0, A1, INT Voltage
-
-0.3 to 6.0
V
IN0-IN7, VREF Voltage
-
-0.3 to VCC+0.3
V
Input Current at Any Pin2
-
±5
mA
Package Input Current
-
±30
mA
Storage temperature Range
TSTG
-65 to 150
°C
Maximum Junction Temperature
TJMAX
150
°C
Lead Temperature(Soldering, 10 Seconds)
TLEAD
260
°C

ElectricalCharacteristics at TA=25°C

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Parameter
Symbol
TestConditions
Min
Typ
Max
Unit
POWERSUPPLYCHARACTERISTICS
Supplyvoltage
VCC
-
3
-
5.5
V
VREF
VREF
External Reference Voltage
1.25
-
VCC
V
VREF
VREF
Internal Reference Voltage
-
2.56
-
V
VREF
VREF
Internal Reference Voltage
-
23
-
V
Current in shutdown mode or deep shutdown mode
ICC_SHUTDOWN
Shutdown Mode, VCC = 5.5V, -40~ 125°C
-
37
100
μA
Current in shutdown mode or deep shutdown mode
ICC_SHUTDOWN
Shutdown Mode, VCC = 3.6V, -40~ 125°C
-
20
80
μA
Current in shutdown mode or deep shutdown mode
ICC_SHUTDOWN
Deep Shutdown Mode, VCC = 5.5V, -40~ 125°C
-
2
10
μA
Current in shutdown mode or deep shutdown mode
ICC_SHUTDOWN
Deep Shutdown Mode, VCC = 3.6V, -40~ 125°C
-
1
5
μA
Voltage Conversion Current
ICC_VOL
VCC = 3.6 V
-
130
-
μA
Voltage Conversion Current
ICC_VOL
VCC = 5.5 V
-
120
-
μA
Temperature Conversion Current
ICC_TEMP
VCC = 3.6 V
-
140
-
μA
Temperature Conversion Current
ICC_TEMP
VCC = 5.5 V
-
130
-
μA
TEMPERATURE-to-DIGITAL CONVERTER CHARACTERISTICS
Temperature Sensor Accuracy
TRAC
TA = -25 to 100°C
-1.0
-
1.0
°C
Temperature Sensor Accuracy
TRAC
TA = -40 to 125°C
-1.5
-
1.5
°C
Resolution
-
-
-
0.0625
-
°C
Total Conversion time
tCON
Continuous Conversion Mode Each Enabled Voltage Channel
-
15
-
°C
Total Conversion time
tCON
Continuous Conversion Mode Internal Temperature Sensor
-
2
-
°C
Total Conversion time
tCON
Low Power Conversion Mode Enabled Voltage Channel(s) and Internal Temperature Sensor
-
874
-
°C
ANALOG-to-DIGITAL CONVERTER CHARACTERISTICS
Input Range
VIN
-
0
-
2.560
V
Total Unadjusted Error2
TUE
Internal VREF , Single-Ended, VCC = 3V to 3.6V , -40~125°C
-0.5
-
0.6
% of FS
Total Unadjusted Error2
TUE
Internal VREF , Single-Ended, VCC = 4.5V to 5.5V , -40~125°C
-0.5
-
0.6
% of FS
Total Unadjusted Error2
TUE
External VREF = 1.25V, Single-Ended, VCC = 3V to 3.6V , -40~125°C
-0.6
-
0.1
% of FS
Total Unadjusted Error2
TUE
External VREF = 2.56V, Single-Ended, VCC = 3.6V to 5.5V , -40~125°C
-0.6
-
0.1
% of FS
Gain Error
GE
Internal VREF , VCC = 3V to 3.6V , -40~125°C
-0.25
-
0.6
% of FS
Gain Error
GE
Internal VREF , VCC = 4.5V to 5.5V , -40~125°C
-0.25
-
0.6
% of FS
Gain Error
GE
External VREF = 1.25V, VCC = 3V to 3.6V , -40~125°C
-0.45
-
0.2
% of FS
Gain Error
GE
External VREF = 2.56V, VCC = 4.5V to 5.5V , -40~125°C
-0.45
-
0.2
% of FS
Gain Error
OE
External VREF = 1.25V, Single-Ended, VCC = 3V to 3.6V , -40~125°C
-0.5
-
0.1
% of FS
Gain Error
OE
External VREF = 2.56V, Single-Ended, VCC = 4.5V to 5.5V , -40~125°C
-0.5
-
0.1
% of FS
ADC INPUT CHARACTERISTICS
ON-Resistance
RON
-40~125°C
-
-
10
kΩ
Input Current (On Channel Leakage Current)
ION
-
-0.005
-
0.005
μA
Off Channel Leakage Current
IOFF
-
-0.005
-
0.005
μA
SERIAL BUS INPUTS: SCL and SDA
μA
Logical 1 Input Voltage
IIN(1)
VIN = VCC
-
-0.005
-
μA
Logical 1 Input Voltage
IIN(1)
VIN = VCC -40~ 125°C
-1
-
-
μA
Logical 0 Input Voltage
IIN(0)
VIN = GND
-
0.005
-
μA
Logical 0 Input Voltage
IIN(0)
VIN = GND -40~ 125°C
-
-
1
μA
Digital Input Capacitance
CIN
-
-
20
-
pF

Related Files

Technical Documentation

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