CS556x/7x/8x Family

High-Throughput A/D Converters

Overview

Description

The CS556x family of Delta-Sigma-based industrial analog-to-digital converters sets new industry performance standards. This new family of high-precision analog converters combines the higher-bandwidth, low-distortion performance of a SAR converter with high-resolution, low-noise performance that is the hallmark of Delta-Sigma ADCs. The breakthrough combination of features provides designers of precision instrumentation, such as industrial process controllers, laboratory instrumentation, medical instrumentation, and high-speed weighing systems, with a significantly higher level of measurement accuracy, lower noise and higher throughput.

Each IC in the family offers exceptional differential non-linearity (DNL) error, which measures the accuracy of the ADC and is of critical importance in control applications. In addition, the single-clock latency digital filter allows conversion-rate switching of the input with no loss in throughput. Other additional key features of the CS556x include:

• High-impedance buffered inputs that simplify external circuitry;
• Fully differential inputs that provide the best possible noise rejection and dynamic accuracy, with the ability to measure bipolar signals; and
• Self calibration to ensure superior measurement accuracy over variations in supply and temperature.

The CS556x family comes available in a 24-lead SSOP package.

Features

• High-speed Delta-Sigma A/D converter
• Differential nonlinearity error: 0.1 LSB
• 24-bits (CS556x) or 16-bits (CS557x/8x), no missing codes
• Conversion rate: 20 mircrosecond (CS556x); 10 microsecond (CS557x); 5 microsecond (CS558x). No latency.
• Self-calibrating architecture maintains accuracy over time and temperature
• High-impedence buffered differential (CS556x) or single-ended (CS5571/81) input versions
• Signal-to-noise ratio: 109 dB (CS5560)
• S/(N+D) = 108 dB (CS5560)
• Digital filter flat to near-Nyquist rate
• 1.8 V to 3.3 V digital and 5 V or ±2.5 V analog supplies
• Simple three/four-wire digital interface
• Power consumption: 90 mW (CS5560); 20 mW (CS5566); 85 mW (CS557x/8x - buffers on)
• 24-pin SSOP package; lead-free assembly

Diagram

Product News