Overview
The AD8275BRMZ-RL, produced by Analog Devices Inc., is a high-performance difference amplifier designed to translate ±10 V signals to a +4 V level. This component is particularly useful in industrial and instrumentation applications where interfacing ±10 V signals to single-supply 4 V or 5 V analog-to-digital converters (ADCs) is necessary. The AD8275 features fast settling time, low distortion, and rail-to-rail outputs, making it an ideal building block for various data acquisition systems.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Supply Voltage Range | 3.3 | 15 | V | |
| Operating Supply Current (VS = ±2.5 V) | 1.9 | 2.3 | mA | |
| Settling Time to 0.01% (4 V step, CL = 100 pF) | 350 | 450 | ns | |
| Settling Time to 0.001% (4 V step, CL = 100 pF) | 450 | 550 | ns | |
| Slew Rate (4 V step) | 20 | 25 | V/μs | |
| Common-Mode Rejection Ratio (CMRR) | 80 | dB | ||
| Input Overvoltage (VS = 5 V) | +40 V to -35 V | |||
| Output Swing (RL = 2 kΩ, VREF2 = 4.096 V) | -VS + 0.048 to +VS - 0.1 | V |
Key Features
- Level Translation: Translates ±10 V signals to a +4 V level, making it suitable for interfacing with single-supply ADCs.
- Fast Settling Time: Settles to 0.001% in 450 ns, ideal for driving medium-speed successive approximation (SAR) ADCs.
- Low Distortion: Ensures low distortion and high slew rate, making it suitable for applications requiring accurate and quick signal capture.
- Rail-to-Rail Outputs: Provides rail-to-rail output swing, enhancing the component's usability in various applications.
- High CMRR: Offers high common-mode rejection ratio (CMRR) of 80 dB, ensuring minimal interference from common-mode signals.
- Single-Supply Operation: Operates on a single supply voltage, reducing power consumption and protecting the ADC from overdrive conditions.
- Precision Resistors: Internal, matched, precision laser-trimmed resistors ensure low gain error and low gain drift.
Applications
- Industrial and Instrumentation: Ideal for applications where ±10 V signals need to be interfaced with single-supply ADCs.
- Data Acquisition Systems: Suitable for various data acquisition applications requiring accurate and quick signal capture.
- Analog Front End: Can be used as an analog front end or to follow buffers for level translating high voltages.
Q & A
- What is the primary function of the AD8275BRMZ-RL?
The AD8275BRMZ-RL translates ±10 V signals to a +4 V level, making it suitable for interfacing with single-supply ADCs.
- What is the settling time of the AD8275BRMZ-RL?
The settling time to 0.001% is 450 ns for a 4 V step with a 100 pF load.
- What is the common-mode rejection ratio (CMRR) of the AD8275BRMZ-RL?
The CMRR is 80 dB.
- What is the input overvoltage protection of the AD8275BRMZ-RL?
The component can handle input overvoltages up to +40 V and down to -35 V when the supply voltage is 5 V.
- What is the output swing of the AD8275BRMZ-RL?
The output swing is from -VS + 0.048 V to +VS - 0.1 V with a reference voltage of 4.096 V and a load resistance of 2 kΩ.
- What is the supply voltage range of the AD8275BRMZ-RL?
The supply voltage range is from 3.3 V to 15 V.
- What are the typical applications of the AD8275BRMZ-RL?
The component is typically used in industrial and instrumentation applications, data acquisition systems, and as an analog front end.
- How does the AD8275BRMZ-RL protect the ADC from overdrive conditions?
The single-supply operation of the AD8275BRMZ-RL helps reduce power consumption and protects the ADC from overdrive conditions.
- What is the significance of the internal, matched, precision laser-trimmed resistors in the AD8275BRMZ-RL?
These resistors ensure low gain error, low gain drift, and high CMRR, enhancing the component's performance and accuracy.
- Can the AD8275BRMZ-RL handle input signals beyond its supply voltage?
Yes, the subtractor topology of the AD8275BRMZ-RL allows it to accept input signals beyond its supply voltage.
