ICL7106 1/2 Digit LCD/LED Display A/D Converters

Description: The Intersil ICL7106 and ICL7107 are high-performance, low-power, 3½ digit analog-to-digital (A/D) converters. They include seven-segment decoders, display drivers, a reference, and a clock. The ICL7106 is designed to interface with a liquid crystal display (LCD) and features a multiplexed backplane drive, while the ICL7107 is capable of directly driving an instrument-sized light-emitting diode (LED) display. Both models combine high accuracy, versatility, and cost-effectiveness. They offer auto-zero capability to less than 10 µV, zero drift of less than 1 µV/°C, and a maximum input bias current of 10 pA, with rollover error of less than one count. The true differential inputs and reference enhance their utility across various systems, providing significant advantages when measuring load cells, strain gauges, and other bridge-type transducers. Additionally, the single power supply operation of the ICL7106 allows for the construction of a high-performance panel meter with the inclusion of only 10 passive components and a display.

The ICL7106 and ICL7107 A/D converters serve as integral components in digital measurement systems, facilitating the conversion of analog signals into digital formats for various applications. The architecture of these devices incorporates advanced features that enhance their performance and usability. The integrated seven-segment decoders and display drivers simplify the interfacing process with visual output devices, enabling straightforward integration into existing systems.

The ICL7106's compatibility with LCDs and the multiplexed backplane drive allows for efficient display management, reducing power consumption while providing clear readouts. In contrast, the ICL7107's capability to drive LED displays makes it suitable for applications where visibility and brightness are paramount.

The precision specifications of these devices, such as the auto-zero feature and low zero drift, ensure that measurements remain stable and accurate over time, even in varying environmental conditions. This is particularly beneficial in applications requiring high reliability, such as medical instrumentation and industrial monitoring systems.

The true differential inputs and reference are noteworthy features that enhance measurement accuracy when working with bridge-type transducers. This design minimizes common-mode noise and allows for more precise readings, which is essential in applications like load measurement and strain analysis.

The economy of operation, particularly with the ICL7106's single power supply requirement, underscores the practicality of these converters in cost-sensitive applications. The ability to achieve high performance with minimal external components streamlines design processes and reduces overall system complexity, making the ICL7106 and ICL7107 ideal choices for engineers designing digital measurement solutions.The Intersil ICL7106 and ICL7107 are high performance, low power, 31/2 digit A/D converters. Included are seven segment decoders, display drivers, a reference, and a clock. The ICL7106 is designed to interface with a liquid crystal display (LCD) and includes a multiplexed backplane drive; the ICL7107 will directly drive an instrument size light em itting diode (LED) display. The ICL7106 and ICL7107 bring together a combination of high accuracy, versatility, and true economy. It features autozero to less than 10 µV, zero drift of less than 1 µV/oC, input bias current of 10pA (Max), and rollover error of less than one count.

True differential inputs and reference are useful in all systems, but give the designer an uncommon advantage when measuring load cells, strain gauges and other bridge type transducers. Finally, the true economy of single power supply operation (ICL7106), enables a high performance panel meter to be built with the addition of only 10 passive components and a display.