## AD7466BRT-R: Electronic Specifications and Overview The **AD7466BRT-R** is a high-performance, low-power, 12-bit Successive Approximation Register (SAR) Analog-to-Digital Converter (ADC) manufactured by Analog Devices. It is specifically designed for battery-powered and portable applications where space and power consumption are critical. --- ### 1. Key Technical Specifications | Parameter | Specification | | :--- | :--- | | **Resolution** | 12-Bit | | **Throughput Rate** | Up to 100 kSPS | | **Power Consumption** | 0.62 mW (at 100 kSPS, 3V supply) | | **Power Supply Range** | 1.6 V to 3.6 V | | **Interface** | High-speed SPI / QSPI / MICROWIRE / DSP Compatible | | **Channel Count** | 1 Single-ended channel | | **Package Type** | 6-lead SOT-23 | | **DNL / INL** | ±1 LSB (Max) | --- ### 2. Core Functional Parts The internal architecture of the AD7466 consists of several critical stages: 1. **Track-and-Hold Amplifier:** This stage captures the input voltage and holds it steady during the conversion process. It can handle input frequencies up to several megahertz, though the conversion rate is limited to 100 kSPS. 2. **SAR ADC Core:** The heart of the chip uses a charge-redistribution DAC. It compares the analog input against a series of binary-weighted voltages to determine the digital value. 3. **Control Logic & Serial Interface:** The device uses a 3-wire serial interface (CS, SCLK, SDATA). The conversion process is initiated by the falling edge of **CS** (Chip Select), and the data is clocked out on the **SCLK** (Serial Clock) edges. 4. **Power Management:** One of the unique features of the AD7466 is that it automatically powers down after a conversion is complete and "wakes up" upon the next CS falling edge. This makes it ideal for duty-cycled applications. --- ### 3. Pin Configuration (SOT-23-6) | Pin No. | Mnemonic | Function | | :--- | :--- | :--- | | 1 | **VDD** | Power Supply Input (1.6V to 3.6V). | | 2 | **GND** | Ground Reference. | | 3 | **VIN** | Analog Input Channel (0V to VDD). | | 4 | **SCLK** | Serial Clock Input for data synchronization. | | 5 | **SDATA** | Serial Data Output (Digital result). | | 6 | **CS** | Chip Select / Power-down Control. | --- ### 4. Application Use Cases * **Portable Instrumentation:** Due to its tiny SOT-23 footprint. * **Battery Monitoring:** Low power consumption (micro-amps range when idle) extends battery life. * **Medical Equipment:** Used in handheld diagnostic tools. * **Remote Data Loggers:** Where the device stays in sleep mode for long periods between samples. ---