Overview
The AD8475BRMZ from Analog Devices Inc. is a high-speed, low-noise, fully differential, attenuating amplifier. It is designed to process signal levels of up to ±10 V on a single supply and is particularly suited for high-speed instrumentation and data acquisition applications. The amplifier features integrated precision gain resistors, providing precision attenuation (by 0.4 or 0.8), common-mode level shifting, and single-ended-to-differential conversion along with input overvoltage protection. It operates on a single supply voltage ranging from 3 V to 10 V or dual supplies from ±1.5 V to ±5 V, making it versatile for various circuit designs.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Supply Voltage | 3 | - | 10 | V |
| Supply Current | - | 3.2 | - | mA |
| Input Offset Voltage | - | - | 100 | μV |
| Input Bias Current | - | - | 5 | pA |
| Bandwidth | - | - | 150 | MHz |
| Slew Rate | - | - | 50 | V/μs |
| Output Noise | - | 3.2 | - | nV/√Hz |
| Temperature Range | -40 | - | 85 | °C |
| Package | - | - | 10-MSOP | - |
Key Features
- Rail-to-Rail Input and Output: The AD8475 supports rail-to-rail input and output, enhancing its versatility in various applications.
- High Speed: It features a 150 MHz -3 dB bandwidth, making it suitable for high-speed instrumentation and data acquisition.
- Low Noise: The amplifier has a low input voltage noise density of 3.2 nV/√Hz, which is crucial for maintaining signal integrity in sensitive applications.
- High Output Current: It can deliver up to 110 mA per channel, enabling it to drive large capacitive loads.
- Fast Slew Rate: The AD8475 has a fast slew rate of 50 V/μs, which is beneficial for applications requiring rapid signal changes.
- Low Offset Voltage and Drift: The amplifier features a low offset voltage of 100 μV max and a low offset voltage drift of 0.5 μV/°C max, ensuring high precision.
- Wide Supply Range: It operates on a single supply voltage ranging from 3 V to 10 V or dual supplies from ±1.5 V to ±5 V, making it adaptable to various power supply conditions.
- Low Power Consumption: The device has a low supply current of 3.2 mA, which is advantageous for power-sensitive applications.
- Robust Overvoltage Protection: The AD8475 offers robust overvoltage protection up to ±15 V (VS = +5 V), enhancing its reliability in harsh environments.
Applications
- Data Acquisition Systems: The AD8475 is ideal for data acquisition systems due to its high speed and low noise characteristics.
- Instrumentation Amplifiers: It is used in building differential instrumentation amplifier blocks and single-ended-to-differential converters.
- High-Speed Active Filters: The amplifier's high bandwidth and fast slew rate make it suitable for high-speed active filter applications.
- Test and Measurement Equipment: Its precision and high-speed capabilities make it a good fit for test and measurement equipment.
- Industrial Control Systems: The AD8475 is used in industrial control systems for signal conditioning and amplification.
- Medical Instrumentation: It is applied in medical instrumentation such as ECG and EEG due to its low noise and high accuracy.
- Strain Gauge and Pressure Sensor Signal Conditioning: The amplifier is used for conditioning signals from strain gauges and pressure sensors.
- Thermocouple Amplifiers: It is suitable for thermocouple amplifiers due to its ability to handle low-level signals and provide high accuracy.
Q & A
- What is the typical supply voltage range for the AD8475BRMZ?
The AD8475BRMZ operates on a single supply voltage ranging from 3 V to 10 V or dual supplies from ±1.5 V to ±5 V.
- What is the bandwidth of the AD8475BRMZ?
The bandwidth of the AD8475BRMZ is 150 MHz.
- What is the slew rate of the AD8475BRMZ?
The slew rate of the AD8475BRMZ is 50 V/μs.
- What is the maximum output current of the AD8475BRMZ?
The maximum output current of the AD8475BRMZ is 110 mA per channel.
- What is the input offset voltage of the AD8475BRMZ?
The input offset voltage of the AD8475BRMZ is typically 100 μV max.
- What is the temperature range for the AD8475BRMZ?
The AD8475BRMZ is specified for operation over a temperature range of -40°C to +85°C.
- What package type is the AD8475BRMZ available in?
The AD8475BRMZ is available in a 10-MSOP package.
- Does the AD8475BRMZ have overvoltage protection?
Yes, the AD8475BRMZ has robust overvoltage protection up to ±15 V (VS = +5 V).
- What are some common applications of the AD8475BRMZ?
Common applications include data acquisition systems, instrumentation amplifiers, high-speed active filters, test and measurement equipment, and industrial control systems.
- Is the AD8475BRMZ RoHS compliant?
Yes, the AD8475BRMZ is RoHS3 compliant.
