SPT774

• 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

• Data Acquisition Systems
• 8 or 12-Bit µP Input Functions
• Process Control Systems
• Test and Scientific Instruments
• Personal Computer Interface

The SPT774 is a complete,12-bit successive approximation A/D converter manufactured in CMOS technology.The de-vice is an improved version of the HADC574Z.Included on chip are an internal reference,clock,and a sample-and-hold.The S/H is an additional feature not available on similar
devices.

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. With a maximum dissipation of 120 mW at the specified voltages, power consumption is about five times lower than that of currently available devices.

The SPT774 is available in 28-lead ceramic sidebrazed DIP,PDIP and SOIC packages in the commercial temperature range.