Overview
The AD8207WBRZ-RL is a zero-drift, high-voltage, bidirectional difference amplifier produced by Analog Devices Inc. This single-supply amplifier is designed to amplify small differential voltages in the presence of large common-mode voltages, making it ideal for various high-voltage and high-current applications. It operates with a single supply voltage of 3.3 V to 5 V and is particularly suited for environments with large input PWM common-mode voltages, such as in solenoid and motor control systems.
Key Specifications
| Parameter | Min | Typ | Max | Unit | Test Conditions/Comments |
|---|---|---|---|---|---|
| GAIN Initial | - | 20 | - | V/V | - |
| GAIN Accuracy over Temperature | -0.3 | - | 0.3 | % | TOPR |
| GAIN vs. Temperature | -15 | 0 | - | ppm/°C | TOPR |
| VOLTAGE OFFSET Offset Voltage (RTI) | -100 | - | 100 | μV | 25°C |
| VOLTAGE OFFSET Over Temperature (RTI) | -400 | - | 400 | μV | TOPR |
| VOLTAGE OFFSET Offset Drift | -1 | - | 1 | μV/°C | TOPR |
| INPUT Input Impedance Differential | - | 240 kΩ | - | - | - |
| INPUT Input Impedance Common Mode | - | 126 kΩ | - | - | - |
| INPUT Input Voltage Range Common mode | -4 | - | 65 | V | V+ = 5 V, TOPR |
| INPUT Input Voltage Range Common mode | -4 | - | 35 | V | V+ = 3.3 V, TOPR |
| INPUT Differential Input Voltage Range | -125 | - | 125 | mV | V+ = 5 V |
| OUTPUT Output Voltage Range | 0.02 V+ - 0.05 V | - | - | - | - |
| TEMPERATURE RANGE For Specified Performance | -40 | - | 125 | °C | - |
Key Features
- Zero-drift architecture with low offset drift (< 500 nV/°C) and low gain drift (< 10 ppm/°C).
- Bidirectional current monitoring capability.
- High common-mode rejection ratio (CMRR) of 90 dB (dc to 10 kHz).
- Wide operating temperature range from -40°C to +125°C.
- EMI filters included for improved noise immunity.
- Two reference pins (VREF1 and VREF2) for output offset adjustment.
- Qualified for automotive applications with controlled manufacturing processes.
Applications
- High-side current sensing in motor control and solenoid control systems.
- Engine management and electric power steering.
- Suspension control and vehicle dynamic control.
- DC-to-DC converters.
Q & A
- What is the operating supply voltage range of the AD8207WBRZ-RL? The AD8207WBRZ-RL operates with a single supply voltage of 3.3 V to 5 V.
- What is the common-mode voltage range of the AD8207WBRZ-RL? The common-mode voltage range is from -4 V to +65 V with a 5 V supply, and from -4 V to +35 V with a 3.3 V supply.
- What is the typical offset drift of the AD8207WBRZ-RL? The typical offset drift is less than 500 nV/°C.
- What is the typical gain drift of the AD8207WBRZ-RL? The typical gain drift is below 10 ppm/°C.
- Is the AD8207WBRZ-RL qualified for automotive applications? Yes, it is qualified for automotive applications with controlled manufacturing processes.
- What is the package type of the AD8207WBRZ-RL? The AD8207WBRZ-RL is available in an 8-lead SOIC package.
- How does the AD8207WBRZ-RL handle EMI? The AD8207WBRZ-RL includes EMI filters for improved noise immunity.
- What is the purpose of the VREF1 and VREF2 pins? The VREF1 and VREF2 pins allow for output offset adjustment, enabling the user to set the output to any voltage within the supply range.
- What are some typical applications of the AD8207WBRZ-RL? Typical applications include high-side current sensing, motor control, solenoid control, engine management, and DC-to-DC converters.
- What is the temperature range for specified performance of the AD8207WBRZ-RL? The temperature range for specified performance is from -40°C to +125°C.
