Overview
The Texas Instruments ADS8902BRGER is a high-speed, 20-bit successive approximation register (SAR) analog-to-digital converter (ADC). This device is part of the ADS890xB family, which includes pin-to-pin compatible ADCs with varying resolutions. The ADS8902BRGER integrates a reference buffer and a low-dropout regulator (LDO), enabling high-performance data acquisition with low power consumption. It supports unipolar and fully differential analog input signals and features an enhanced multiSPI digital interface for high throughput at lower clock speeds, making it ideal for applications involving FPGAs, DSPs, and microcontrollers[7.1].
Key Specifications
| Specification | Value | Unit |
|---|---|---|
| Resolution | 20-bit | |
| Sample Rate | Up to 500 kSPS | |
| Input Type | Unipolar, Fully Differential | |
| Reference Voltage Range | 2.5 V to 5 V | |
| Power Consumption (at 500 kSPS) | 16 mW | |
| Package Type | 24-pin VQFN (RGE) | |
| Operating Temperature Range | -40°C to +125°C | |
| Differential Nonlinearity (DNL) | -0.5 to 0.5 LSB | |
| Integral Nonlinearity (INL) | -2 to 2 ppm | |
| Input Offset Error | -11.5 to 11.5 ppm |
Key Features
- Integrated Reference Buffer and LDO: Supports burst-mode data acquisition and allows operation on a single supply voltage, enhancing system reliability and simplifying board design[7.3.1).
- Enhanced MultiSPI Digital Interface: Backward-compatible with traditional SPI protocol, enabling high throughput at lower clock speeds and simplifying communication with microcontrollers, DSPs, and FPGAs[7.3.4).
- High Performance and Low Power Consumption: Achieves high-resolution data transfer with low power consumption, making it suitable for applications requiring fast, low-noise, and low-distortion data acquisition[7.1).
- Data Parity Feature: Includes an internal data parity feature to improve system reliability by validating ADC data output using parity bits.
- Compact Package: Available in a 24-pin VQFN (RGE) package, suitable for space-constrained applications.
Applications
- Test and Measurement: Ideal for high-precision measurement instruments requiring fast and accurate data acquisition[7.1).
- Medical Devices: Suitable for medical applications that demand low-noise and low-distortion data conversion[7.1).
- Industrial Automation: Used in industrial control systems and data acquisition systems that require high-speed and high-resolution ADCs[7.1).
- FPGA and DSP Systems: Compatible with FPGAs and DSPs, making it a versatile choice for various digital signal processing applications[7.3.4).
Q & A
- What is the resolution of the ADS8902BRGER ADC?
The ADS8902BRGER has a 20-bit resolution[7.1).
- What is the maximum sample rate of the ADS8902BRGER?
The maximum sample rate is up to 500 kSPS).
- What types of analog input signals does the ADS8902BRGER support?
The device supports unipolar and fully differential analog input signals[7.1]).
- What is the power consumption of the ADS8902BRGER at 500 kSPS?
The power consumption is approximately 16 mW at 500 kSPS[7.1]).
- What is the operating temperature range of the ADS8902BRGER?
The operating temperature range is -40°C to +125°C[7.1]).
- Does the ADS8902BRGER have an integrated reference buffer and LDO?
Yes, it includes an integrated reference buffer and LDO, enabling single-supply operation and supporting burst-mode data acquisition[7.3.1]).
- What digital interface does the ADS8902BRGER use?
The device uses an enhanced multiSPI digital interface, which is backward-compatible with traditional SPI protocol[7.3.4]).
- Does the ADS8902BRGER support data parity for system reliability?
Yes, it includes an internal data parity feature to improve system reliability by validating ADC data output using parity bits).
- In what package is the ADS8902BRGER available?
The device is available in a 24-pin VQFN (RGE) package).
- What are some typical applications of the ADS8902BRGER?
Typical applications include test and measurement, medical devices, industrial automation, and systems involving FPGAs and DSPs[7.1]).
