**AD7667ASTZ: A 16-Bit, 1 MSPS Pseudo Differential PulSAR ADC for Precision Data Acquisition Systems**

In the realm of high-performance electronics, the accurate digitization of analog signals is a cornerstone of system integrity. The **AD7667ASTZ from Analog Devices** stands as a pivotal component in this process, engineered to deliver exceptional performance in demanding precision data acquisition applications. This 16-bit, 1 MSPS (Mega Sample Per Second) analog-to-digital converter (ADC) combines high speed with remarkable accuracy, making it an ideal solution for a wide array of industrial, medical, and instrumentation systems.

At the heart of the AD7667ASTZ is the proprietary **PulSAR® architecture**, a charge-redistribution successive approximation register (SAR) technique renowned for its precision and inherent lack of latency. This architecture ensures that every conversion is accurate and that the output data is available immediately after the conversion cycle, a critical feature for real-time control and monitoring systems. The device operates with a **pseudo-differential input**, which offers a excellent compromise between the noise immunity of fully differential designs and the simplicity of single-ended ones. The pseudo-differential input rejects common-mode noise, which is crucial in electrically noisy environments typical of industrial settings, by measuring the voltage difference between the VIN+ and VIN- pins.

The **AD7667ASTZ achieves outstanding linearity performance**, boasting typical specifications of ±0.5 LSB INL (Integral Non-Linearity) and ±0.3 LSB DNL (Differential Non-Linearity). This ensures that the digital output is a faithful representation of the analog input, minimizing errors across the entire dynamic range. Furthermore, it provides **excellent AC performance** with a high signal-to-noise ratio (SNR) of 92 dB typical, enabling the precise capture of dynamic signals.

Housed in a compact 48-lead LQFP package, the ADC is designed for robust operation. It features a versatile parallel and serial interface, allowing for easy connection to microprocessors, DSPs, and FPGAs. Its internal conversion clock and on-chip reference simplify system design by reducing the number of external components required. The device also supports a **low-power mode**, enhancing its suitability for portable or power-sensitive equipment without compromising on performance.

**ICGOO**

The AD7667ASTZ is a powerhouse ADC that masterfully balances high speed, resolution, and precision. Its PulSAR architecture and pseudo-differential input structure make it an exceptionally reliable and versatile choice for designers building next-generation data acquisition systems where accuracy and speed are non-negotiable.

**Keywords:**

1. **PulSAR ADC**

2. **16-Bit Resolution**

3. **1 MSPS**

4. **Pseudo-Differential Input**

5. **Precision Data Acquisition**