Overview
The AD8418WBRZ-RL is a high-precision, low-power instrumentation amplifier produced by Analog Devices Inc. This component is specifically designed for automotive and industrial applications, offering exceptional signal conditioning and robust operation in harsh environments.
It features a unique architecture that accurately amplifies small differential current shunt voltages in the presence of rapidly changing common-mode voltages, making it ideal for current sensing, motor control, and power management applications.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Operating Temperature Range | -40°C | +125°C | °C | |
| Power Supply Voltage Range | 2.7V | 5.5V | V | |
| Quiescent Current | 2.6mA | mA | ||
| Gain Initial | 20 V/V | V/V | ||
| Gain Error Over Temperature | ±0.15% | % | ||
| Voltage Offset, Referred to the Input (RTI) | ±200 μV | ±400 μV | μV | |
| Offset Drift | -0.4 μV/°C | 0.1 μV/°C | 0.4 μV/°C | μV/°C |
| Common-Mode Rejection Ratio (CMRR) | 90 dB | 100 dB | dB | |
| Small Signal -3 dB Bandwidth | 250 kHz | kHz | ||
| Slew Rate | 1 V/μs | V/μs |
Key Features
- High-precision, low-power instrumentation amplifier with a gain of 20 V/V and a maximum ±0.15% gain error over the entire temperature range.
- Single-supply operation from 2.7V to 5.5V and a low quiescent current of 2.6mA.
- Wide operating temperature range from -40°C to +125°C.
- Bidirectional operation and high common-mode input voltage range from -2V to +70V.
- Excellent common-mode rejection ratio (CMRR) of up to 100 dB.
- Includes electromagnetic interference (EMI) filters and patented circuitry for accurate output with PWM common-mode inputs.
- Available in 8-lead SOIC and 8-lead MSOP packages.
- Qualified for automotive applications with robust operation in harsh environments.
Applications
- High-side current sensing in motor controls, solenoid controls, and power management systems.
- Low-side current sensing.
- Diagnostic protection.
- Industrial instrumentation.
- Battery management systems.
Q & A
- What is the primary function of the AD8418WBRZ-RL?
The AD8418WBRZ-RL is a high-precision, low-power instrumentation amplifier designed for accurate current sensing in automotive and industrial applications.
- What is the operating temperature range of the AD8418WBRZ-RL?
The operating temperature range is from -40°C to +125°C.
- What is the power supply voltage range for the AD8418WBRZ-RL?
The power supply voltage range is from 2.7V to 5.5V.
- What is the typical quiescent current of the AD8418WBRZ-RL?
The typical quiescent current is 2.6mA.
- What is the gain of the AD8418WBRZ-RL?
The initial gain is 20 V/V with a maximum ±0.15% gain error over the entire temperature range.
- What is the common-mode rejection ratio (CMRR) of the AD8418WBRZ-RL?
The CMRR is up to 100 dB.
- Does the AD8418WBRZ-RL include EMI filters?
- In what packages is the AD8418WBRZ-RL available?
- Is the AD8418WBRZ-RL qualified for automotive applications?
- What are some common applications of the AD8418WBRZ-RL?
