SPT574 Datasheet | SPT

FEATURES - Improved Version of the HADC574Z - plete 12-Bit A/D Converter with Sample/Hold, Reference and Clock - Low Power Dissipation (100 m W Max) - 12-Bit Linearity (Over Temp) - 25 µs Max Conversion Time - Single +5 V Supply - Full Bipolar and Unipolar Input Range APPLICATIONS - - - - - Data Acquisition Systems 8 or 12-Bit µP Input Functions Process Control Systems Test and Scientific Instruments Personal puter Interface GENERAL DESCRIPTION The SPT574 is a plete, 12-bit successive approximation A/D converter manufactured in CMOS technology. The device 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 SPT574 features 25 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 SPT574 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 100 m W at the specified voltages, power consumption is about five times lower than that of currently available devices. The SPT574 is available in 28-lead ceramic sidebrazed DIP, PDIP and SOIC packages in the mercial temperature range. BLOCK DIAGRAM Nibble A Output Nibble B Three-State Buffers And Control Nibble C 12-Bit SAR + p Clock 12-Bit Capacitance DAC Offset/Gain Trim Control Logic Ref 20 V In 10 V In BIP Off 12/8 Ao R/C Ref Out AGND Signal Processing Technologies, Inc. 4755 Forge Road, Colorado Springs, Colorado 80907, USA Phone: (719) 528-2300 FAX: (719) 528-2370 Website: http://.spt. E-Mail: sales@spt. ABSOLUTE MAXIMUM RATINGS (Beyond which damage may occur) 1 25 °C Supply Voltages Mode...