## Technical Overview of AD7467BRTZ-R2 The **AD7467BRTZ-R2** is a high-performance, low-power, 10-bit Successive Approximation Register (SAR) Analog-to-Digital Converter (ADC) manufactured by **Analog Devices**. It is designed for high-speed, battery-powered applications where space and power consumption are critical. --- ### 1. Key Technical Specifications | Parameter | Specification | | :--- | :--- | | **Resolution** | 10-Bit | | **Throughput Rate** | Up to 100 kSPS | | **Interface Type** | Serial (SPI/QSPI/MICROWIRE/DSP Compatible) | | **Supply Voltage (VDD)** | 1.6 V to 3.6 V | | **Power Consumption** | 0.62 mW (at 3 V, 100 kSPS) | | **Package Type** | SOT-23-6 (Small Outline Transistor) | | **Input Channels** | 1 (Single-Ended) | --- ### 2. Core Features * **Ultra-Low Power:** The device automatically enters a "power-down" mode between conversions, making it ideal for systems with limited battery life. * **No Pipeline Delay:** As a SAR ADC, the conversion result is available immediately after the process completes, without the latency found in Sigma-Delta ADCs. * **Wide Dynamic Range:** It offers a signal-to-noise ratio (SNR) typically around 62 dB, ensuring high-quality signal digitization. * **Integrated Clock:** The conversion process is driven by an internal clock, simplifying the timing requirements for the host microcontroller. --- ### 3. Pin Configuration (SOT-23-6) | Pin No. | Mnemonic | Description | | :--- | :--- | :--- | | 1 | **VDD** | Power Supply (1.6 V to 3.6 V). | | 2 | **GND** | Ground Reference. | | 3 | **VIN** | Analog Input Channel (0V to VDD). | | 4 | **SCLK** | Serial Clock Input (used to clock out data). | | 5 | **SDATA** | Serial Data Output (10 bits of data). | | 6 | **CS** | Chip Select (Active Low). Initiates conversion. | --- ### 4. Implementation Example (Pseudo-Code) Communicating with the AD7467 using a standard SPI interface generally follows this logic: ```c // Example logic to read 10-bit value from AD7467 uint16_t read_AD7467() { uint16_t raw_value = 0; digitalWrite(CS_PIN, LOW); // Start Conversion // Receive 16 bits (AD7467 outputs leading zeros, 10-bit data, trailing zeros) raw_value = SPI.transfer16(0x0000); digitalWrite(CS_PIN, HIGH); // End Conversion / Power Down // Shift and mask to extract the 10-bit data return (raw_value >> 4) & 0x03FF; } ``` --- ### 5. Common Applications * **Portable Battery-Powered Instruments:** Handheld meters and medical devices. * **Remote Data Acquisition:** IoT sensors and environmental monitoring. * **Smart Sensors:** Providing digital outputs for analog transducers (pressure, temperature). * **Mobile Communications:** Low-power signal processing.