SPT SPT774
The SPT774 is a complete, 12-bit successive approximation A/D converter manufactured in CMOS technology. The device is an improved version of the HADC574Z. The S/H is an additional feature not available on similar devices.FEATURES
● Improved Higher Performance Version of the HADC574Z● Complete 12-Bit A/D Converter with Sample/Hold, Reference and Clock
● Low Power Dissipation (120 mW Max)
● 12-Bit Linearity (Over Temp)
● 8 µs Max Conversion Time
● Single +5 V Supply
● Full Bipolar and Unipolar Input Range
APPLICATIONS
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● Data Acquisition Systems 8 or 12-Bit µP Input Functions Process Control Systems Test and Scientific Instruments Personal Computer Interface
GENERAL DESCRIPTION
Included on chip are an internal reference, clock, and a sample-and-hold. The SPT774 features 8 µs (max) conversion time of 10 or 20 V input signals. Also, a three-state output buffer is added for direct interface to an 8-, 12- or 16-bit µP bus. The SPT774 has standard bipolar and unipolar input ranges of 10 V and 20 V that are controlled by a bipolar offset pin and laser trimmed for specified linearity, gain and offset accuracy. The power supply is +5 V. The device also has an optional mode control voltage which may be used depending on the application.