Overview
The AD8418ABRMZ, produced by Analog Devices Inc., is a high voltage, high resolution current shunt amplifier. This device is specifically designed for high-side and low-side current sensing in various automotive and industrial applications. It features an initial gain of 20 V/V with a maximum ±0.15% gain error over the entire temperature range, ensuring high accuracy in current measurements. The AD8418A is AEC-Q100 qualified for automotive applications and operates over a wide temperature range, making it robust and reliable for demanding environments.
Key Specifications
| Parameter | Value |
|---|---|
| Gain | 20 V/V |
| Gain Error | ±0.15% (max) over temperature range |
| Common-Mode Range | −2 V to +70 V |
| Operating Temperature Range | −40°C to +125°C (AD8418AWB and AD8418AB), −40°C to +150°C (AD8418AWH) |
| Supply Voltage | 2.7 V to 5.5 V |
| Quiescent Current | 4.1 mA (AD8418AWB and AD8418AB), 4.2 mA (AD8418AWH) |
| Power Supply Rejection Ratio | 80 dB |
| Bandwidth | 250 kHz |
| Slew Rate | 1 V/μs |
| Noise (0.1 Hz to 10 Hz, RTI) | 2.3 μV p-p |
| Spectral Density at 1 kHz, RTI | 110 nV/√Hz |
Key Features
- Bidirectional current measurements across a shunt resistor.
- Excellent input common-mode rejection ratio (CMRR) of 90 dB.
- Proprietary technology to eliminate the negative effects of fast-changing external common-mode variations.
- Zero drift architecture providing low offset and offset drift.
- EMI filters integrated for improved noise immunity.
- Available in 8-lead SOIC_N, 8-lead MSOP, and FMEA tolerant 10-lead MSOP pinout.
- Ratiometric output offset adjustment using reference pins.
Applications
- High-side current sensing in motor controls and solenoid controls.
- Low-side current sensing.
- Power management systems.
- Diagnostic protection circuits.
- Automotive and industrial applications requiring precise current measurement.
Q & A
- What is the primary function of the AD8418ABRMZ?
The AD8418ABRMZ is a high voltage, high resolution current shunt amplifier designed for high-side and low-side current sensing. - What is the gain of the AD8418ABRMZ?
The gain of the AD8418ABRMZ is 20 V/V. - What is the common-mode range of the AD8418ABRMZ?
The common-mode range is from −2 V to +70 V. - What are the operating temperature ranges for the AD8418ABRMZ?
The operating temperature ranges are −40°C to +125°C for AD8418AWB and AD8418AB, and −40°C to +150°C for AD8418AWH. - What is the power supply voltage range for the AD8418ABRMZ?
The power supply voltage range is from 2.7 V to 5.5 V. - What is the quiescent current of the AD8418ABRMZ?
The quiescent current is 4.1 mA for AD8418AWB and AD8418AB, and 4.2 mA for AD8418AWH. - What is the bandwidth of the AD8418ABRMZ?
The bandwidth is 250 kHz. - How does the AD8418ABRMZ handle EMI?
The AD8418ABRMZ includes integrated EMI filters to improve noise immunity. - What are some common applications of the AD8418ABRMZ?
Common applications include high-side current sensing in motor controls, solenoid controls, power management, and diagnostic protection circuits. - Is the AD8418ABRMZ qualified for automotive applications?
Yes, the AD8418ABRMZ is AEC-Q100 qualified for automotive applications.
