**AD7835ASZ: A Comprehensive Technical Overview of the 16-Bit Voltage Output DAC**

The **AD7835ASZ** from Analog Devices represents a high-performance, **16-bit voltage-output digital-to-analog converter (DAC)** engineered for precision applications where accuracy and stability are paramount. This device integrates a sophisticated DAC architecture with onboard output amplifiers and reference circuitry, delivering a complete, monolithic solution for generating analog voltages from digital inputs.

At the core of the AD7835ASZ is a **16-bit segmented R-2R ladder network**. This architecture is chosen for its excellent integral and differential linearity performance, ensuring minimal non-linear distortion across the entire digital code range. The converter operates from a single +5 V supply, drawing a low typical supply current of 4 mA, making it suitable for power-sensitive systems. A key feature is its **on-chip precision output amplifier**, which is capable of generating both unipolar (0 V to +2.5 V, 0 V to +5 V) and bipolar (±1.25 V, ±2.5 V) output voltage ranges, configured via simple pin strapping. This flexibility allows it to interface directly with a wide variety of systems without requiring external level-shifting circuitry.

The device includes a **1.25 V/2.5 V on-chip buried Zener reference**, which is laser-trimmed during production to ensure high initial accuracy and low temperature drift. This integrated reference is a significant advantage, as it reduces the component count and design complexity associated with sourcing an external reference, while guaranteeing matched performance. The AD7835ASZ offers a **parallel 16-bit data interface** for high-speed data loading. Its double-buffered input structure consists of an input register and a DAC register. This allows the user to asynchronously update the outputs of multiple DACs simultaneously using the LDAC (Load DAC) pin, a critical feature for multi-channel systems requiring synchronous updates.

Performance is characterized by outstanding DC precision. The AD7835ASZ boasts **exceptional 16-bit monotonicity**, ensuring the output voltage always increases for an increasing digital code—a vital characteristic for control and calibration systems. It features a low typical gain error of ±4 LSB and a very low output noise floor. The settling time to within ±0.003% FS for a full-scale step is a swift 10 µs, enabling it to respond quickly in dynamic waveform generation applications.

The AD7835ASZ is offered in a 44-lead MQFP (Metric Quad Flat Pack) package, designed for operation over the industrial temperature range of -40°C to +85°C. Its combination of high resolution, integrated features, and robust performance makes it an ideal choice for a vast array of applications, including **industrial process control, automated test equipment (ATE), precision instrumentation, and high-resolution closed-loop servo-control systems**.

**ICGOO**DFIND: The AD7835ASZ stands as a benchmark in 16-bit voltage output DACs, integrating a precision reference and output amplifier to deliver unparalleled accuracy, flexibility, and ease of use for the most demanding analog output requirements.

**Keywords:**

1. **16-Bit DAC**

2. **Voltage Output**

3. **Monotonicity**

4. **Integrated Reference**

5. **Parallel Interface**