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说明
- Programmable Gain Options through I2C from 10V/V to 200V/V (8 steps)
- ±1μV (typ) Input Offset Voltage for REF1 = REF2 = VDD/2
- ±5μV (typ) Input Offset Voltage for REF1 = VDD and REF2 = GND at Gain = 20V/V
- ±0.01% (typ) Gain Error
- -5V to +70V Input Voltage Range
- -6V to +80V Protective Immunity
- 70kHz, -3dB Bandwidth at Gain = 20V/V
- 145dB DC CMRR
- Rail-to-Rail Output
- 3mm x 3mm, TDFN-10 Package
- -40°C to +125°C Temperature Range
特性
The MAX49918 is a high-precision current-sense amplifier (CSA) with an I2C programmable gain option from 10V/V to 200V/V in 8 steps. The multiple programmable gain options offer maximum flexibility for the user to change gain on-the-fly.
The IC operating input common-mode range from -5V to +70V, with protections that extend down to -6V and up to +80V, thus providing protection against reverse-battery and high-voltage spikes.
The low input offset of ±1μV (typ) and low gain error of ±0.01% (typ) make this device best-suited for high-precision current measurements.
The IC operates from a supply voltage of +2.7V to +5.5V with a typical quiescent supply at 0.7mA. The device operates over the full -40°C to +125°C temperature range.The IC features bidirectional current sensing and is offered in a 3mm x 3mm, 10-pin TDFN package.
APPLICATIONS
- Monitoring Distinct Current Levels
- Using the Same Current-Sense Resistors Across Multiple System Variants
- Requires a Non-Typical Gain Value Due to Sense Resistor Constraints
- H-Bridge Motor and Solenoid Current Sensing
- Battery Current Monitoring
- High- and Low-Side Precision Current Sensing
参数
类型 | 描述 |
工业自动化技术 (IAT) | 工业电源 |
