INA745A
40V, 16bit high-precision I2C output digital power monitor with 800μΩ- EZShunt™ technology
INA745A
- Low loss integrated shunt resistor
- Internal resistance: 800 µΩ, TA = 25°C
- Continuous current: ±35 A, TA = 25°C
- Peak measurement capability: ±39.32 A
- Current monitoring accuracy: A/B Grade, maximum
- Offset current: ±6.25 mA / ±62.5 mA
- Offset drift: ±30 µA/°C (A and B Grades)
- System gain error: ±0.75% / ±1.25%
- Common-mode rejection: ±0.125 / ±1.25 mA/V
- Power monitoring accuracy: A/B Grade, maximum
- ±0.9% / ±1.6% at 25°C, full scale
- Energy and charge accuracy: A/B Grade, maximum
- ±1.4% / ±2.1% at 25°C, full scale
- Temperature sensor: ±1.5°C (maximum at 25°C)
- Precision oscillator: ±0.5% (maximum at 25°C)
- Programmable conversion time and averaging
- 2.94-MHz high-speed I2C interface with 16 pin-selectable addresses
- Operates from a 2.7-V to 5.5-V supply:
- Operational current: 640 µA (typical)
- Shutdown current: 5 µA (maximum)
The INA745x is a digital power monitor with an integrated current sensing element along with a 16-bit delta-sigma ADC specifically designed for current-sensing applications. The device can measure full-scale currents up to ±39.32 A with common-mode voltage support from –0.1 V to +40 V.
The INA745x reports current, bus voltage, die temperature, power, energy and charge accumulation while employing a precision ±0.5% integrated oscillator, all while performing the needed calculations in the background. The integrated temperature sensor is ±2.5°C accurate over the junction temperature range.
The low offset and gain drift design of the INA745x allows the device to be used in precise systems that do not undergo multi-temperature calibration during manufacturing.
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.
Technical documentation
Type | Title | Date | ||
---|---|---|---|---|
* | Data sheet | INA745x 40 V , 16 -Bit, Precision I2C Output Digital Power Monitor with EZShunt Technology datasheet (Rev. A) | PDF | HTML | 19 Dec 2023 |
Application note | Risks and Prevention of ESD, EOS, and Latch Up Events for Current Sense Amplifiers | PDF | HTML | 18 Nov 2024 | |
Functional safety information | INA74X-Q1 Functional Safety FIT Rate, FMD and Pin FMA | PDF | HTML | 21 Oct 2024 | |
Application note | How EZShunt Technology Simplifies and Reduces Error in Shunt-Based Designs | PDF | HTML | 27 Jun 2024 | |
EVM User's guide | INA740-INA741EVM, INA745-INA746EVM, INA780-INA781EVM User's Guide (Rev. A) | PDF | HTML | 22 Dec 2023 |
Design & development
For additional terms or required resources, click any title below to view the detail page where available.
INA745-INA746EVM — INA745 and INA746 evaluation module for EZShunt™ Digital Power Monitor with built-in shunt resistor
The INA745 and IN746 evaluation module (EVM) is a compact platform for evaluating the main features and performance of the INA745A, INA745B or INA746 high-precision digital power monitors with EZShunt™ Technology across specified input current, common-mode voltage and temperature ranges. (...)
ANALOG-ENGINEER-CALC — PC software analog engineer's calculator
The analog engineer’s calculator is designed to speed up many of the repetitive calculations that analog circuit design engineers use on a regular basis. This PC-based tool provides a graphical interface with a list of various common calculations ranging from setting operational-amplifier (...)
Supported products & hardware
Products
Precision op amps (Vos<1mV)
General-purpose op amps
Audio op amps
Transimpedance amplifiers
High-speed op amps (GBW ≥ 50 MHz)
Power op amps
Video amplifiers
Line drivers
Transconductance amplifiers & laser drivers
Fully differential amplifiers
Precision ADCs
Biosensing AFEs
High-speed ADCs (≥10 MSPS)
Touchscreen controllers
Difference amplifiers
Instrumentation amplifiers
Audio line receivers
Analog current-sense amplifiers
Digital power monitors
Analog current-sense amplifiers with integrated shunt resistor
Digital power monitors with integrated shunt resistor
Die & wafer services
RF receivers
RF transmitters
PSPICE-FOR-TI — PSpice® for TI design and simulation tool
TINA-TI — SPICE-based analog simulation program
Package | Pins | CAD symbols, footprints & 3D models |
---|---|---|
VQFN (REL) | 14 | Ultra Librarian |
Ordering & quality
- RoHS
- REACH
- Device marking
- Lead finish/Ball material
- MSL rating/Peak reflow
- MTBF/FIT estimates
- Material content
- Qualification summary
- Ongoing reliability monitoring
- Fab location
- Assembly location
Support & training
TI E2E™ forums with technical support from TI engineers
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