AD4020BRUZ - 20-Bit, 1.8 MSPS SAR ADC | Analog Devices
MPN: AD4020BRUZ β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $29.49 | $29.49 |
| 10 | $27.5 | $275.00 |
| 100 | $24 | $2,400.00 |
| 500 | $21 | $10,500.00 |
| 1,000 | $19 | $19,000.00 |
Drop-in alternatives for AD4020BRUZ β same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
AD4020BRMZ
β Drop-Inπ Reference alternative (not in catalog)
AD4021BRUZ
β Drop-Inπ Reference alternative (not in catalog)
AD4022BRUZ
β Drop-Inπ Reference alternative (not in catalog)
ADS8881
β Drop-Inπ Reference alternative (not in catalog)
AD4020BRUZ Maximum Ratings & Electrical Characteristics
| Resolution | 20 bits |
| Sampling Rate | 1.8 MSPS (max) |
| Input Type | Differential |
| Number of Inputs | 1 |
| Architecture | SAR |
| SNR (at 1 kHz) | 100.5 dB typical |
| SNR (at 100 kHz) | 99 dB typical |
| THD (at 1 kHz) | -123 dB typical |
| INL | Β±3.1 ppm max |
| No Missing Codes | 20-bit guaranteed |
| Supply Voltage (VDD) | 1.8 V |
| Logic Interface Voltage | 1.7 V to 5.5 V |
| Interface | SPI, QSPI, Microwire, DSP |
| Package | 10-MSOP |
| Operating Temperature | -40Β°C to +125Β°C |
| Power Dissipation | [DATA_NEEDED: power dissipation] |
AD4020BRUZ Pin Configuration
| Pin 1 | VDD β Power supply, 1.8 V |
| Pin 2 | IN+ β Positive differential input |
| Pin 3 | IN- β Negative differential input |
| Pin 4 | GND β Ground |
| Pin 5 | VREF β Reference voltage input |
| Pin 6 | SDI β Serial data input for configuration |
| Pin 7 | SDO β Serial data output |
| Pin 8 | SCK β Serial clock input |
| Pin 9 | CNV β Convert input, initiates conversion |
| Pin 10 | VIO β Logic interface supply, 1.7 V to 5.5 V |
Safe Operating Area (SOA) & Thermal Characteristics
No official SOA curve available for this component. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.
Typical Applications
AD4020BRUZ is suitable for 6 applications: High-Speed Data Acquisition, Industrial Process Control, Medical Instrumentation, Test and Measurement Equipment, Audio and Vibration Analysis, Battery-Powered Devices.
High-Speed Data Acquisition
The AD4020BRUZ's 1.8 MSPS sampling rate and 20-bit resolution make it ideal for high-speed data acquisition systems. It can digitize fast-changing signals with high accuracy, enabling precise measurement in applications such as vibration analysis, transient recording, and automated test equipment. The Easy Drive feature reduces input drive requirements, allowing direct connection to sensors and amplifiers without complex front-end circuitry. The low power consumption is beneficial for portable data loggers, and the SPI interface simplifies integration with microcontrollers and FPGAs.
Recommended
Industrial Process Control
In industrial process control, the AD4020BRUZ provides high-resolution conversion of sensor signals such as temperature, pressure, and flow. Its differential input rejects common-mode noise, ensuring accurate readings in electrically noisy environments. The wide operating temperature range (-40Β°C to +125Β°C) allows deployment in harsh industrial settings. The device's low INL (Β±3.1 ppm) ensures linearity, which is critical for closed-loop control systems. The SPI interface enables easy connection to PLCs and industrial microcontrollers, and the low power consumption reduces heat generation in control cabinets.
Recommended
Medical Instrumentation
The AD4020BRUZ is well-suited for medical instrumentation such as patient monitoring, diagnostic imaging, and laboratory analyzers. Its high SNR (100.5 dB) and low THD (-123 dB) ensure accurate reproduction of biological signals, which are often small and noise-prone. The 20-bit resolution allows detection of subtle variations in signals like ECG, EEG, and blood pressure. The low power consumption is advantageous for battery-powered portable medical devices. The small 10-MSOP package saves board space, and the wide logic voltage range allows direct interface with various medical-grade microcontrollers.
Recommended
Test and Measurement Equipment
For test and measurement equipment, the AD4020BRUZ offers the speed and precision needed for accurate waveform digitization. Its 1.8 MSPS sampling rate captures high-frequency signals, while the 20-bit resolution provides fine amplitude detail. The differential input supports balanced measurements, and the low distortion ensures faithful reproduction of the input signal. The device's Easy Drive technology simplifies the design of front-end amplifiers, reducing component count and cost. The SPI interface allows seamless integration with FPGAs and DSPs used in oscilloscopes, spectrum analyzers, and data loggers.
Recommended
Audio and Vibration Analysis
The AD4020BRUZ's high SNR and low THD make it excellent for audio and vibration analysis. It can digitize audio signals with minimal added noise, preserving the original sound quality. In vibration monitoring, the 20-bit resolution captures small amplitude variations, enabling early detection of mechanical faults. The differential input rejects common-mode interference, which is common in industrial environments. The device's low power consumption is beneficial for portable vibration analyzers. The SPI interface allows easy data streaming to a host processor for real-time analysis.
Recommended
Battery-Powered Devices
The AD4020BRUZ is ideal for battery-powered devices due to its low power consumption and 1.8 V supply. It enables high-resolution sensing in portable instruments, wireless sensors, and IoT devices. The low power dissipation extends battery life, while the 20-bit resolution ensures accurate measurements. The device's small package and wide logic voltage range make it easy to integrate into compact designs. The SPI interface supports low-power sleep modes, further reducing energy consumption. The high SNR ensures reliable data even in low-signal conditions.
Recommended
Recommended Products Summary
Engineering reference data for AD4020BRUZ β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | AD4020BRMZ | AD4021BRUZ | AD4022BRUZ | ADS8881 |
|---|---|---|---|---|---|
| Package | 10-MSOP | 10-MSOP | 10-MSOP | 10-MSOP | 10-MSOP |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Texas Instruments |
| Resolution | 20 bits | 20 bits | 20 bits | 20 bits | 18 bits |
| Max Sampling Rate | 1.8 MSPS | 1.8 MSPS | 2 MSPS | 500 kSPS | 1 MSPS |
| SNR (at 1 kHz) | 100.5 dB | 100.5 dB | 100.5 dB | 100.5 dB | 99 dB |
| THD (at 1 kHz) | -123 dB | -123 dB | -123 dB | -123 dB | -120 dB |
| INL | Β±3.1 ppm | Β±3.1 ppm | Β±3.1 ppm | Β±3.1 ppm | Β±2 LSB |
| Supply Voltage | 1.8 V | 1.8 V | 1.8 V | 1.8 V | 2.7 V to 5.5 V |
Key Differentiators
- Higher resolution than ADS8881 (vs ADS8881)
- Higher sampling rate than AD4022BRUZ (vs AD4022BRUZ)
- Lower power than LTC2378-20 (vs LTC2378-20)
Design Notes
The AD4020BRUZ operates from a single 1.8 V supply. Use a low-noise LDO regulator to provide the VDD supply, and place a 10 Β΅F ceramic capacitor close to the VDD pin. The VIO pin can be powered from 1.7 V to 5.5 V, allowing direct interface with different logic levels. Ensure that the VIO supply is clean and decoupled with a 100 nF capacitor.
For optimal performance, place the AD4020BRUZ close to the signal source to minimize trace length and reduce noise pickup. Use a solid ground plane and avoid routing digital signals near the analog input pins. Decouple the VREF pin with a 10 Β΅F and 100 nF capacitor in parallel, and connect the reference source directly to the VREF pin with a low-impedance trace.
A common mistake is driving the analog input with a high-impedance source, which can cause settling time errors. Use a low-impedance driver, such as an op-amp buffer, to ensure the input settles within the acquisition time. Also, ensure that the reference voltage is stable and noise-free, as any reference noise directly affects the ADC's SNR. Avoid exceeding the absolute maximum ratings on any pin.
Compliance Information
RoHS compliant per Analog Devices product page. Not AEC-Q100 qualified.
