Overview
The AD8418AWHRZ, produced by Analog Devices Inc., is a high-voltage, high-resolution current shunt amplifier designed for automotive and industrial applications. It features an initial gain of 20 V/V and is capable of bidirectional current measurements across a shunt resistor. The device is known for its excellent input common-mode rejection, wide operating temperature range, and low power consumption. It is particularly suited for high-side and low-side current sensing in various applications such as motor control, solenoid control, and power management.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Gain | 20 | - | - | V/V |
| Gain Error Over Temperature | - | - | ±0.15% | - |
| Voltage Offset, Referred to the Input (RTI) | - | ±200 μV | ±400 μV | μV |
| Offset Drift | -0.4 | 0.1 | 0.4 | μV/°C |
| Input Bias Current | - | 130 μA | 260 μA | μA |
| Input Voltage Range (Common Mode) | -2 | - | 70 | V |
| Common-Mode Rejection Ratio (CMRR) | 90 | 100 | - | dB |
| Output Voltage Range | 0.032 VS - 0.032 V | - | - | V |
| Output Resistance | - | - | 2 Ω | Ω |
| Power Supply Operating Range | 2.7 | - | 5.5 | V |
| Quiescent Current | - | 4.1 mA | 4.2 mA | mA |
| Operating Temperature Range | -40 | - | 150 | °C |
Key Features
- High initial gain of 20 V/V with a maximum ±0.15% gain error over the entire temperature range.
- Bidirectional current measurements across a shunt resistor.
- Excellent input common-mode rejection from -2 V to +70 V.
- Wide operating temperature range: -40°C to +150°C for the AD8418AWH model.
- Low quiescent current of 4.1 mA to 4.2 mA.
- High common-mode rejection ratio (CMRR) of up to 100 dB.
- Single-supply operation from 2.7 V to 5.5 V.
- Compact 8-lead SOIC and MSOP packages.
- AEC-Q100 qualified for automotive applications.
- Robust operation in harsh environments with EMI filters and patented circuitry.
Applications
- High-side current sensing in motor controls and solenoid controls.
- Low-side current sensing.
- Power management and diagnostic protection.
- Industrial instrumentation and battery management.
- Automotive and industrial applications requiring precise current sensing and robust operation.
Q & A
- What is the initial gain of the AD8418AWHRZ? The initial gain of the AD8418AWHRZ is 20 V/V.
- What is the operating temperature range of the AD8418AWHRZ? The operating temperature range is -40°C to +150°C for the AD8418AWH model.
- What is the common-mode rejection ratio (CMRR) of the AD8418AWHRZ? The CMRR is up to 100 dB.
- What is the power supply operating range of the AD8418AWHRZ? The power supply operating range is from 2.7 V to 5.5 V.
- Is the AD8418AWHRZ qualified for automotive applications? Yes, the AD8418AWHRZ is AEC-Q100 qualified for automotive applications.
- What are the typical applications of the AD8418AWHRZ? Typical applications include high-side and low-side current sensing in motor controls, solenoid controls, power management, and diagnostic protection.
- What is the quiescent current of the AD8418AWHRZ? The quiescent current is 4.1 mA to 4.2 mA.
- Does the AD8418AWHRZ have EMI filters? Yes, the AD8418AWHRZ includes EMI filters and patented circuitry for robust operation.
- What is the output voltage range of the AD8418AWHRZ? The output voltage range is 0.032 VS - 0.032 V.
- What are the package options for the AD8418AWHRZ? The device is available in 8-lead SOIC and MSOP packages.
