The **AD7980BCPZ-R2** is a high-performance, 16-bit, Successive Approximation Register (SAR) Analog-to-Digital Converter (ADC) manufactured by Analog Devices. It is widely used in precision data acquisition systems due to its low power consumption and high speed. --- ### 1. Key Technical Specifications The following table summarizes the primary electrical characteristics of the AD7980BCPZ-R2: | Parameter | Specification | | :--- | :--- | | **Resolution** | 16-Bit | | **Throughput Rate** | 1 MSPS (Mega Samples Per Second) | | **ADC Architecture** | SAR (Successive Approximation Register) | | **Interface** | SPI, QSPI, MICROWIRE, DSP Compatible | | **Supply Voltage (VDD)** | 2.5 V | | **Input Range** | 0 V to VREF (Unipolar) | | **Power Dissipation** | 7.0 mW at 1 MSPS | | **Package** | 10-Lead LFCSP (3mm x 3mm) | --- ### 2. Functional Components and Features #### A. The SAR Core Unlike Delta-Sigma ADCs, the SAR architecture allows for **zero latency**. This means the digital output corresponds directly to the current analog input sample, making it ideal for multiplexed systems. #### B. Power Management The device features an automatic "power-down" mode between conversions. The power consumption scales linearly with the throughput rate: - At 1 MSPS: 7.0 mW - At 10 kSPS: 70 µW - This makes it highly efficient for battery-powered portable devices. #### C. Versatile Serial Interface The digital interface is compatible with 1.8V, 2.5V, 3V, and 5V logic. It supports: - **CS Mode:** Daisy-chaining multiple ADCs onto a single SPI bus. - **Chain Mode:** Reducing the number of required I/O lines in multi-channel systems. --- ### 3. Pin Configuration (10-Lead LFCSP) | Pin Name | Function | | :--- | :--- | | **IN+** | Positive Analog Input | | **IN-** | Reference Ground / Negative Analog Input | | **REF** | External Reference Voltage Input (2.5V to 5V) | | **VDD** | Analog Power Supply (2.5V) | | **VIO** | Digital Interface Power Supply | | **SDI/SDO** | Serial Data Input / Output | | **SCK** | Serial Data Clock | | **CNV** | Convert Input (Initiates the conversion process) | --- ### 4. Typical Applications * **Medical Instruments:** MRI, ECG, and portable monitors. * **Industrial Automation:** Process control and high-speed data acquisition. * **Battery-Powered Systems:** Remote sensors and hand-held test equipment. * **Communication:** Optical line monitoring. ---