Overview
The AD4021BRMZ-RL7 is a high-accuracy, high-speed, low-power 20-bit precision successive approximation register (SAR) analog-to-digital converter (ADC) produced by Analog Devices Inc. This ADC operates from a single power supply, VDD, and features an externally applied reference voltage, VREF, which can be set independently of the supply voltage. The AD4021 is part of the AD4020/AD4021/AD4022 family, known for their Easy Drive technology, which reduces signal chain complexity and power consumption, enabling higher channel density.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Resolution | 20 | Bits | ||
| Analog Input Voltage Range | -VREF | +VREF | V | |
| Operating Input Voltage (VIN+, VIN- to GND) | -0.1 | +VREF + 0.1 | V | |
| Common-Mode Input Range | VREF/2 - 0.125 | VREF/2 + 0.125 | V | |
| Common-Mode Rejection Ratio (CMRR) | 68 | dB | ||
| Throughput Rate (fS) | 0 | 1 MSPS | ||
| Conversion Time | 1000 | ns | ||
| Integral Nonlinearity Error (INL) | -3.1 | ±1 | +3.1 | ppm |
| Differential Nonlinearity Error (DNL) | -0.5 | ±0.3 | +0.5 | LSB |
| Package | 10-Lead MSOP | |||
| Temperature Range | -40 | +125 | °C |
Key Features
- Easy Drive Technology: Reduces signal chain complexity and power consumption, enabling higher channel density and eliminating the need for a dedicated ADC driver.
- High Accuracy: Offers high accuracy with integral nonlinearity error (INL) of ±3.1 ppm and differential nonlinearity error (DNL) of ±0.5 LSB.
- Low Power Consumption: Power scales linearly with throughput, making it efficient for various applications.
- Input Span Compression: Eliminates the need for a negative supply to the ADC driver amplifier while preserving access to the full ADC code range.
- Input Overvoltage Clamp: Protects the ADC inputs against overvoltage events, minimizing disturbances on the reference pin and eliminating the need for external protection diodes.
- High-Speed Operation: Supports throughputs up to 1 MSPS.
- Flexible Interface: Features a 3-wire or 4-wire SPI interface, supporting daisy chaining and CS (Chip Select)).
Applications
- Industrial Automation: Suitable for precision measurement and control systems in industrial environments.
- Medical Devices: Ideal for medical equipment requiring high accuracy and low power consumption.
- Aerospace and Defense: Used in various military and aerospace applications where high precision and reliability are critical.
- Test and Measurement Equipment: Employed in high-precision test and measurement instruments.
- Automotive Systems: Applied in automotive systems that require accurate and reliable data conversion.
Q & A
- What is the resolution of the AD4021BRMZ-RL7 ADC?
The AD4021BRMZ-RL7 has a resolution of 20 bits.
- What is the typical throughput rate of the AD4021BRMZ-RL7?
The typical throughput rate is up to 1 MSPS).
- What is the operating temperature range of the AD4021BRMZ-RL7?
The operating temperature range is from -40°C to +125°C).
- What is the package type of the AD4021BRMZ-RL7?
The package type is 10-Lead MSOP).
- Does the AD4021BRMZ-RL7 require a dedicated ADC driver?
No, the Easy Drive technology eliminates the need for a dedicated ADC driver).
- What is the common-mode rejection ratio (CMRR) of the AD4021BRMZ-RL7?
The CMRR is 68 dB).
- How does the input span compression feature work?
The input span compression feature eliminates the need for a negative supply to the ADC driver amplifier while preserving access to the full ADC code range).
- What is the purpose of the input overvoltage clamp?
The input overvoltage clamp protects the ADC inputs against overvoltage events, minimizing disturbances on the reference pin and eliminating the need for external protection diodes).
- What interface options are available for the AD4021BRMZ-RL7?
The AD4021BRMZ-RL7 features a 3-wire or 4-wire SPI interface, supporting daisy chaining and CS (Chip Select)).
- What are some typical applications of the AD4021BRMZ-RL7?
Typical applications include industrial automation, medical devices, aerospace and defense, test and measurement equipment, and automotive systems.
