1 Introduction

The 6-channel ADS114S06 and 12-channel ADS114S08 are 16-bit, 4000 sample-per-second (SPS), delta-sigma analog-to-digital converters (ADCs). These devices offer an integrated analog front-end that consists of:

• A fully-flexible input multiplexer
• Dual excitation current sources (IDACs)
• A low-noise programmable gain amplifier (PGA)
• A low-drift 2.5-V voltage reference with buffered reference output
• A temperature sensor
• A precision oscillator
• Multiple monitoring and diagnostic features

The ADC performance and feature set make these devices an excellent choice for all types of precision sensor measurements in end-equipment such as:

• Pressure transmitters
• Temperature controllers
• Temperature transmitters
• PLC analog input modules

Figure 1-1 illustrates the functional block diagram for these two ADCs.

Figure 1-1 Functional Block Diagram

The differences between the standard and B-grade versions are separated into three different categories:

• Performance
• Features
• Specifications

These categories are discussed in detail in the following sections.