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INA239AIDGST PDF预览

INA239AIDGST

更新时间: 2024-11-14 02:58:35
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德州仪器 - TI /
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描述
INA239 85-V, 16-Bit, High-Precision Power Monitor With SPI Interface

INA239AIDGST 数据手册

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INA239-Q1  
SLYS028A – MAY 2020 – REVISED JUNE 2021  
INA239-Q1 AEC-Q100, 85-V, 16-Bit, High-Precision Power Monitor With SPI Interface  
1 Features  
3 Description  
AEC-Q100 qualified for automotive applications:  
Temperature grade 1: –40°C to +125°C, TA  
Functional Safety-Capable  
Documentation available to aid functional safety  
system design  
The INA239-Q1 is an ultra-precise digital power  
monitor with a 16-bit delta-sigma ADC specifically  
designed for current-sensing applications. The device  
can measure a full-scale differential input of ±163.84  
mV or ±40.96 mV across a resistive shunt sense  
element with common-mode voltage support from –  
0.3 V to +85 V.  
High-resolution, 16-bit delta-sigma ADC  
Current monitoring accuracy:  
– Offset voltage: ±5 µV (maximum)  
– Offset drift: ±0.02 µV/°C (maximum)  
– Gain error: ±0.1% (maximum)  
– Gain error drift: ±25 ppm/°C (maximum)  
– Common mode rejection: 140 dB (minimum)  
Power monitoring accuracy:  
The INA239-Q1 reports current, bus voltage,  
temperature, and power, all while performing  
the needed calculations in the background. The  
integrated temperature sensor is ±1°C accurate  
for die temperature measurement and is useful in  
monitoring the system ambient temperature.  
– 0.7% full scale, –40°C to +125°C (maximum)  
Fast alert response: 75 μs  
Wide common-mode range: –0.3 V to +85 V  
Bus voltage sense input: 0 V to 85 V  
Shunt full-scale differential range:  
The low offset and gain drift design of the INA239-  
Q1 allows the device to be used in precise systems  
that do not undergo multi-temperature calibration  
during manufacturing. Further, the very low offset  
voltage and noise allow for use in A to kA sensing  
applications and provide a wide dynamic range  
without significant power dissipation losses on the  
sensing shunt element. The low input bias current  
of the device permits the use of larger current-  
sense resistors, thus providing accurate current  
measurements in the micro-amp range.  
±163.84 mV / ±40.96 mV  
Input bias current: 2.5 nA (maximum)  
Temperature sensor: ±1°C (maximum at 25°C)  
Programmable conversion time and averaging  
10-MHz SPI communication interface  
Operates from a 2.7-V to 5.5-V supply:  
– Operational current: 640 µA (typical)  
– Shutdown current: 5 µA (maximum)  
The device allows for selectable ADC conversion  
times from 50 µs to 4.12 ms as well as sample  
averaging from 1x to 1024x, which further helps  
reduce the noise of the measured data.  
2 Applications  
Automotive battery management systems  
EV / HEV A - KA sense applications  
DC/DC converters and power inverters  
ADAS domain controllers  
Device Information(1)  
PART NUMBER  
PACKAGE  
BODY SIZE (NOM)  
INA239-Q1  
VSSOP (10)  
3.00 mm × 3.00 mm  
(1) For all available packages, see the package option  
addendum at the end of the data sheet.  
VS  
Power  
Reference  
IN+  
IN-  
SCLK  
Voltage Current  
Power  
Temp  
MOSI  
MISO  
CS  
16 Bit  
ADC  
MUX  
SPI  
VBUS  
+
Oscillator  
Out-of-range  
Threshold  
ALERT  
œ
GND  
Simplified Block Diagram  
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,  
intellectual property matters and other important disclaimers. PRODUCTION DATA.  
 
 
 

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