Overview
The AD8208WBRZ-RL, produced by Analog Devices Inc., is a high-voltage precision difference amplifier designed for applications requiring the amplification and low-pass filtering of small differential voltages in the presence of large common-mode voltages. This device is particularly suited for automotive and industrial environments due to its robust performance and high precision.
The AD8208 offers excellent ac and dc performance, including a minimum common-mode rejection ratio (CMRR) of 80 dB from dc to 10 kHz, and low offset and gain drift. It is available in SOIC-8 packages and is qualified for automotive applications, ensuring reliability and precision in demanding environments.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Operating Supply Voltage | 4.5 | 5 | 5.5 | V |
| Quiescent Current | - | 1.6 | - | mA |
| Input Common-Mode Voltage Range | -2 | - | 45 | V |
| Output Voltage Range | 0.075 VS - 0.1 | - | 0.1 VS - 0.12 | V |
| Input Bias Current | - | 50 | - | nA |
| Output Resistance | - | 2 | - | Ω |
| System Bandwidth | - | 70 | - | kHz |
| Slew Rate | - | 1 | - | V/μs |
| CMRR | 80 | - | - | dB (dc to 10 kHz) |
| Temperature Range | -40 | - | 125 | °C (WB grade), -40 to 150°C (WH grade) |
Key Features
- High common-mode rejection ratio (CMRR) of 80 dB from dc to 10 kHz.
- Low offset voltage of ±1 mV and low gain drift of 5 ppm/°C.
- Externally accessible 100 kΩ resistor for low-pass filtering and gain adjustment.
- Enhanced input overvoltage and ESD protection.
- EMI filtering for improved noise immunity.
- Single-supply operation from 4.5 V to 5.5 V.
- High temperature range: -40°C to +125°C (WB grade) and -40°C to +150°C (WH grade).
Applications
- High-side current sensing.
- Motor controls.
- Solenoid controls.
- Power management.
- Low-side current sensing.
- Diagnostic protection.
- Automotive applications requiring robust and precise components.
Q & A
- What is the primary function of the AD8208WBRZ-RL?
The AD8208WBRZ-RL is a high-voltage precision difference amplifier designed to amplify and low-pass filter small differential voltages in the presence of large common-mode voltages.
- What is the operating supply voltage range for the AD8208WBRZ-RL?
The device operates from a single supply voltage of 4.5 V to 5.5 V.
- What is the CMRR of the AD8208WBRZ-RL?
The CMRR is a minimum of 80 dB from dc to 10 kHz.
- What are the key features of the AD8208WBRZ-RL's input stage?
The input stage offers enhanced overvoltage and ESD protection, and it includes EMI filtering.
- What are the typical applications of the AD8208WBRZ-RL?
Typical applications include high-side current sensing, motor controls, solenoid controls, power management, and low-side current sensing.
- What is the temperature range for the AD8208WBRZ-RL?
The temperature range is -40°C to +125°C for the WB grade and -40°C to +150°C for the WH grade.
- How does the AD8208WBRZ-RL handle noise and interference?
The device includes EMI filtering to improve noise immunity.
- What is the slew rate of the AD8208WBRZ-RL?
The slew rate is 1 V/μs.
- Can the AD8208WBRZ-RL be used in automotive applications?
Yes, the AD8208WBRZ-RL is qualified for automotive applications.
- How can the gain of the AD8208WBRZ-RL be adjusted?
The gain can be adjusted using the externally accessible 100 kΩ resistor.
