Overview
The AD8418ABRMZ-RL, produced by Analog Devices Inc., is a high-voltage, high-resolution current shunt amplifier designed for precise current sensing in various automotive and industrial applications. This bidirectional amplifier features an initial gain of 20 V/V with a maximum ±0.15% gain error over the entire temperature range. It includes EMI filters and patented circuitry to ensure output accuracy even with pulse-width modulation (PWM) type input common-mode voltages. The device is AEC-Q100 qualified for automotive applications and offers a wide operating temperature range, making it suitable for motor control, power management, and solenoid control among other uses.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Initial Gain | 20 | V/V |
| Gain Error Over Temperature | ±0.15% | |
| Input Bias Current | 130 μA | |
| Input Voltage Range (Common Mode) | -2 V to +70 V | |
| Common-Mode Rejection Ratio (CMRR) | 90 dB | |
| Output Voltage Range | 0.032 VS - 0.032 V | |
| Output Resistance | 2 Ω | |
| Bandwidth | 250 kHz | |
| Slew Rate | 1 V/μs | |
| Supply Voltage Range | 2.7 V to 5.5 V | |
| Quiescent Current | 4.1 mA | |
| Operating Temperature Range | -40°C to +125°C (AD8418AB), -40°C to +150°C (AD8418AWH) |
Key Features
- Bidirectional current measurements across a shunt resistor.
- High common-mode rejection ratio (CMRR) of 90 dB.
- Low offset voltage of ±200 μV over the full temperature range.
- High bandwidth of 250 kHz and a slew rate of 1 V/μs.
- Includes EMI filters and patented circuitry for accurate output with PWM inputs.
- Zero drift architecture with an input offset drift of less than 400 nV/°C.
- Available in 8-lead SOIC_N, 8-lead MSOP, and FMEA tolerant 10-lead MSOP pinout.
Applications
- High-side current sensing in motor controls and solenoid controls.
- Power management and low-side current sensing.
- Battery monitoring and diagnostic protection.
- Automotive and industrial applications requiring precise current measurements.
Q & A
- Q: What is the initial gain of the AD8418ABRMZ-RL?
A: The initial gain is 20 V/V. - Q: What is the common-mode rejection ratio (CMRR) of the AD8418ABRMZ-RL?
A: The CMRR is 90 dB. - Q: What is the operating temperature range of the AD8418ABRMZ-RL?
A: The operating temperature range is -40°C to +125°C for AD8418AB and -40°C to +150°C for AD8418AWH. - Q: What is the supply voltage range for the AD8418ABRMZ-RL?
A: The supply voltage range is 2.7 V to 5.5 V. - Q: What are the typical applications of the AD8418ABRMZ-RL?
A: Typical applications include high-side current sensing in motor controls, power management, battery monitoring, and diagnostic protection. - Q: Is the AD8418ABRMZ-RL AEC-Q100 qualified?
A: Yes, the AD8418ABRMZ-RL is AEC-Q100 qualified for automotive applications. - Q: What is the bandwidth of the AD8418ABRMZ-RL?
A: The bandwidth is 250 kHz. - Q: What is the slew rate of the AD8418ABRMZ-RL?
A: The slew rate is 1 V/μs. - Q: How does the AD8418ABRMZ-RL handle EMI?
A: The AD8418ABRMZ-RL includes EMI filters to ensure accurate output even with PWM inputs. - Q: What is the warranty period for the AD8418ABRMZ-RL from Ovaga?
A: Ovaga offers a 1-year warranty on the AD8418ABRMZ-RL.
