**AD7923BRU: A High-Performance, Space-Efficient 12-Bit ADC Solution**
In the realm of data acquisition systems, the ability to accurately and efficiently convert real-world analog signals into a digital format is paramount. The **AD7923BRU from Analog Devices** stands out as a highly integrated, precision solution designed to meet these demands in space-constrained applications. This 12-bit, 4-channel successive approximation register (SAR) analog-to-digital converter (ADC) combines high speed, low power, and a compact form factor, making it an excellent choice for a wide array of industrial, medical, and communication systems.
At its core, the AD7923BRU delivers **true 12-bit performance** with no missing codes, ensuring high accuracy for precise measurement applications. Its **fast sampling rate of 250 kSPS** (kilo-samples per second) allows it to accurately capture rapidly changing signals, which is critical in dynamic control systems and instrumentation. The device features a versatile **4-channel single-ended analog input multiplexer**, enabling a single ADC to sequentially digitize signals from up to four different sources. This multiplexer is preceded by a low-noise, wide-bandwidth track-and-hold amplifier that ensures excellent dynamic performance across the entire Nyquist bandwidth.
Power efficiency is a key strength of the AD7923BRU. It operates from a single **2.7 V to 5.25 V supply**, making it compatible with both 3 V and 5 V systems. Its power consumption scales linearly with the sampling rate, a feature that is crucial for battery-powered portable equipment. At maximum throughput, it consumes just 8 mW with a 5 V supply, dropping to a mere 15 µW at significantly reduced speeds, thanks to its flexible auto-shutdown between conversions.
The ADC interfaces with a host microcontroller or DSP via a high-speed, **3-wire serial interface** that is compatible with SPI, QSPI, MICROWIRE, and digital signal processor protocols. This simple interface minimizes the number of required I/O pins, simplifying board layout and reducing system complexity. The input range can be configured via software to be either 0 to VREF or 0 to 2×VREF, providing design flexibility for different signal conditioning requirements. The reference voltage, VREF, is derived from the power supply, eliminating the need for an external reference component and further saving board space and system cost.
Housed in a **compact 16-lead TSSOP package**, the AD7923BRU is engineered for high-density PCB designs. Its small footprint is ideal for applications where board real estate is at a premium. The device is specified over the industrial temperature range of -40°C to +85°C, ensuring reliable operation in harsh environmental conditions.
**ICGOODFIND:** The AD7923BRU is a highly integrated and versatile SAR ADC that expertly balances performance, power consumption, and size. Its combination of a 250 kSPS sampling rate, 4-input multiplexer, serial interface, and tiny TSSOP package makes it a superior choice for designers seeking to add robust, multi-channel data acquisition capabilities to space-constrained and power-sensitive applications.
**Keywords:**
1. **12-Bit ADC**
2. **250 kSPS**
3. **4-Channel Multiplexer**
4. **SAR Architecture**
5. **TSSOP Package**
