Overview
The AD4020BCPZ-RL7, produced by Analog Devices Inc., is a high-accuracy, high-speed, low-power 20-bit successive approximation register (SAR) analog-to-digital converter (ADC). This device operates from a single power supply and features an externally applied reference voltage that can be set independently of the supply voltage. The AD4020 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 | -0.1 | +VREF + 0.1 | V | |
| Common-Mode Input Range | VREF/2 - 0.125 | VREF/2 + 0.125 | V | |
| Throughput Rate (fS) | 0 | 1.8 MSPS | ||
| Conversion Time | 300 | 320 | 350 | ns |
| Integral Nonlinearity Error (INL) | -3.1 | ±1 | +3.1 | ppm |
| Differential Nonlinearity Error (DNL) | -0.5 | ±0.3 | +0.5 | LSB |
| Power Supply Voltage (VDD) | 1.71 | 1.89 | V | |
| Input/Output Interface | 3-Wire or 4-Wire SPI |
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.
- Input Span Compression: Allows full ADC code range access without the need for a negative supply to the ADC driver amplifier.
- 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: Significantly reduces input current, particularly useful in high-Z mode.
- External Reference Voltage: Can be set independently of the supply voltage.
Applications
The AD4020BCPZ-RL7 is suitable for a variety of high-performance applications, including:
- Industrial Automation: For precise measurement and control in industrial environments.
- Medical Devices: For high-accuracy data acquisition in medical equipment.
- Aerospace and Defense: For reliable and precise data conversion in harsh environments.
- Test and Measurement Equipment: For accurate and high-speed data acquisition in various testing scenarios.
Q & A
- What is the resolution of the AD4020BCPZ-RL7?
The AD4020BCPZ-RL7 has a resolution of 20 bits. - What is the maximum throughput rate of the AD4020BCPZ-RL7?
The maximum throughput rate is 1.8 MSPS. - What is the typical conversion time for the AD4020BCPZ-RL7?
The typical conversion time is 320 ns. - Does the AD4020BCPZ-RL7 require a dedicated ADC driver?
No, the Easy Drive technology eliminates the need for a dedicated ADC driver. - What is the input overvoltage clamp feature?
The input overvoltage clamp protects the ADC inputs against overvoltage events, minimizing disturbances on the reference pin. - Can the reference voltage be set independently of the supply voltage?
Yes, the reference voltage can be set independently of the supply voltage. - What is the common-mode input range of the AD4020BCPZ-RL7?
The common-mode input range is VREF/2 - 0.125 to VREF/2 + 0.125 V. - What is the power supply voltage range for the AD4020BCPZ-RL7?
The power supply voltage range is 1.71 V to 1.89 V. - What interface does the AD4020BCPZ-RL7 use for communication?
The AD4020BCPZ-RL7 uses a 3-wire or 4-wire SPI interface. - What are some typical applications for the AD4020BCPZ-RL7?
Typical applications include industrial automation, medical devices, aerospace and defense, and test and measurement equipment.
