Overview
The AD4022BRMZ is a high-accuracy, high-speed, low-power 20-bit successive approximation register (SAR) analog-to-digital converter (ADC) produced by Analog Devices Inc. This ADC operates from a single power supply, VDD, and allows the reference voltage, VREF, to be set independently of the supply voltage. The AD4022 is part of the AD4020/AD4021/AD4022 family, known for their precision and low power consumption, making them suitable for a variety of high-performance applications.
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) | - | - | 500 kSPS | - |
| Conversion Time | - | - | 2000 ns | - |
| Integral Nonlinearity Error (INL) | -3.1 | - | +3.1 | ppm |
| Differential Nonlinearity Error (DNL) | -0.5 | - | +0.5 | LSB |
| Power Supply Voltage (VDD) | 1.71 | - | 1.89 | V |
| Operating Temperature Range | -40 | - | +125 | °C |
Key Features
- High Accuracy and Speed: The AD4022 offers 20-bit resolution with a throughput rate of up to 500 kSPS, making it suitable for high-performance applications.
- Low Power Consumption: The power consumption scales linearly with throughput, reducing power requirements in low-speed applications.
- Easy Drive Technology: This feature reduces signal chain complexity and power consumption, enabling higher channel density and eliminating the need for a dedicated ADC driver.
- Input Span Compression: This feature allows the ADC to operate without a negative supply voltage while maintaining 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-Z Mode: Reduces input current, particularly in high-Z mode, coupled with a long signal acquisition phase, which simplifies the design of the signal chain).
Applications
- Industrial Automation: High-accuracy measurements are crucial in industrial automation, and the AD4022's precision and speed make it an ideal choice).
- Medical Devices: The low power consumption and high accuracy of the AD4022 are beneficial in medical devices where precise measurements are necessary).
- Aerospace and Defense: The AD4022's robust performance over a wide temperature range makes it suitable for aerospace and defense applications).
- Test and Measurement Equipment: The high resolution and accuracy of the AD4022 make it a good fit for test and measurement equipment where precise data acquisition is required).
Q & A
- What is the resolution of the AD4022 ADC?
The AD4022 has a resolution of 20 bits.
- What is the maximum throughput rate of the AD4022?
The maximum throughput rate of the AD4022 is 500 kSPS.
- What is the operating temperature range of the AD4022?
The AD4022 operates over a temperature range of -40°C to +125°C.
- Does the AD4022 require a dedicated ADC driver?
No, the AD4022's Easy Drive technology eliminates the need for a dedicated ADC driver.
- What is the purpose of the input overvoltage clamp in the AD4022?
The input overvoltage clamp protects the ADC inputs against overvoltage events and minimizes disturbances on the reference pin.
- Can the AD4022 operate without a negative supply voltage?
- What is the common-mode rejection ratio (CMRR) of the AD4022?
The CMRR of the AD4022 is 68 dB at an input frequency of 500 kHz.
- How does the power consumption of the AD4022 scale with throughput?
The power consumption of the AD4022 scales linearly with throughput.
- What package options are available for the AD4022?
The AD4022 is available in 10-Lead MSOP and 10-Lead LFCSP packages.
- Are there evaluation boards available for the AD4022?
