INA234
- High-side or low-side current sensing
- Operates from a 1.7V to 5.5V power supply
- Reports current, voltage and power
- Programmable full scale range: 20mV / 80mV
- Input common mode range: –0.3V to 28V
- Current monitoring accuracy:
- 12-bit ADC resolution
- 0.5% gain error (maximum)
- 100µV offset (maximum)
- Low input bias current: 10nA (maximum)
- Configurable averaging options
- General call addressing allows conversion synchronization among devices
- Alert limits for over and under current events
- 1.2V compliant I2C, SMBus interface
- Two device address options with a 4-pin selectable address
- DSBGA-8 Package (0.745mm × 1.508mm)
- Operating temperature: –40°C and +125°C
The INA234 device is a 12-bit digital current monitor with an I2C/SMBus-compatible interface that is compliant with a wide range of digital bus voltages such as 1.2V, 1.8V, 3.3V, and 5V. The device monitors the voltage across an external sense resistor and reports values for current, bus voltage, and power.
The INA234 features programmable ADC conversion times and averaging. The device also has a programmable calibration value with an internal multiplier that enables direct readouts of current in amperes and power in watts. The device monitors the bus voltage present on the IN– pin and can alert on overcurrent and undercurrent conditions as well as overvoltage and undervoltage conditions. High input impedance while in current measurement mode allows use of larger current sense resistors needed to measure small value system currents.
The INA234 senses current on common-mode bus voltages that can vary from –0.3V to 28V, independent of the supply voltage. The device operates from a single 1.7V to 5.5V supply, drawing a typical supply current of 300µA in normal operation. The device can be placed in a low-power standby mode where the typical operating current is 2.2µA.
기술 자료
설계 및 개발
추가 조건 또는 필수 리소스는 사용 가능한 경우 아래 제목을 클릭하여 세부 정보 페이지를 확인하세요.
INA234_236EVM — 전류/전압/전원 모니터용 INA232, INA234 및 INA236 평가 모듈
ASC-STUDIO-INA234 — ASC Studio (SysConfig) for configuring all aspects of the INA234 digital power monitor
ANALOG-ENGINEER-CALC — PC software analog engineer's calculator
아날로그 엔지니어의 계산기는 아날로그 회로 설계 엔지니어가 정기적으로 사용하는 많은 반복 계산의 속도를 높이도록 설계되었습니다. 이 PC 기반 툴은 피드백 저항을 사용한 연산 증폭기 게인 설정부터 아날로그-디지털 컨버터(ADC) 드라이브 버퍼 회로 안정화를 위한 적절한 회로 설계 요소 선택에 이르기까지 다양한 일반적인 계산 목록이 포함된 그래픽 인터페이스를 제공합니다.
이 계산기는 독립 실행형 툴로 유용할 뿐만 아니라 아날로그 엔지니어의 포켓 레퍼런스에 설명된 개념과도 잘 어울립니다.
CS-AMPLIFIER-ERROR-TOOL — Current Sense Amplifier Comparison and Error Tool
SBOR021 — Power Monitor Tool
| 패키지 | 핀 | CAD 기호, 풋프린트 및 3D 모델 |
|---|---|---|
| DSBGA (YBJ) | 8 | Ultra Librarian |