Overview
The AD8208WBRZ from Analog Devices Inc. is a single-supply difference amplifier designed to amplify and low-pass filter small differential voltages in the presence of large common-mode voltages. This device is particularly suited for automotive applications, offering robust and precise performance. It features enhanced input overvoltage and ESD protection, along with built-in EMI filtering. The AD8208WBRZ operates with a single +5 V supply and can handle input common-mode voltages ranging from -2 V to +45 V, making it versatile for various high-voltage applications.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Operating Temperature Range | -40°C | 125°C | °C | |
| Supply Voltage Range | 4.5 V | 5 V | 5.5 V | V |
| Quiescent Current | 1.6 mA | mA | ||
| Input Common-Mode Voltage Range | -2 V | +45 V | V | |
| Gain (Preamplifier A1) | 10 V/V | V/V | ||
| Gain (Output Buffer A2) | 2 V/V | V/V | ||
| CMRR | 80 dB | dB | ||
| System Bandwidth | 70 kHz | kHz | ||
| Slew Rate | 1 V/µs | V/µs | ||
| Input Bias Current | 50 nA | nA | ||
| Output Resistance | 2 Ω | Ω |
Key Features
- Single-supply operation with a supply voltage range of 4.5 V to 5.5 V.
- High input common-mode voltage range from -2 V to +45 V.
- Excellent ac and dc performance with a typical offset voltage of ±1 mV and gain drift of -5 ppm/°C.
- Minimum CMRR of 80 dB from dc to 10 kHz.
- Enhanced input overvoltage and ESD protection.
- Integrated EMI filtering.
- Externally accessible 100 kΩ resistor for low-pass filtering and gain adjustment.
- System bandwidth of 70 kHz and slew rate of 1 V/µs.
- Available in 8-lead NSOIC package.
- AEC-Q100 qualified for automotive applications.
Applications
- High-side current sensing.
- Motor controls.
- Solenoid controls.
- Power management.
- Low-side current sensing.
- Diagnostic protection.
Q & A
- What is the operating temperature range of the AD8208WBRZ?
The operating temperature range is from -40°C to 125°C for the WB grade and -40°C to 150°C for the WH grade.
- What is the input common-mode voltage range of the AD8208WBRZ?
The input common-mode voltage range is from -2 V to +45 V.
- What is the typical gain drift of the AD8208WBRZ?
The typical gain drift is -5 ppm/°C.
- What is the CMRR of the AD8208WBRZ?
The minimum CMRR is 80 dB from dc to 10 kHz.
- Does the AD8208WBRZ have built-in EMI filtering?
- What is the system bandwidth of the AD8208WBRZ?
The system bandwidth is 70 kHz.
- What is the slew rate of the AD8208WBRZ?
The slew rate is 1 V/µs.
- What package types are available for the AD8208WBRZ?
- Is the AD8208WBRZ qualified for automotive applications?
- What is the typical quiescent current of the AD8208WBRZ?
