High Speed8-Bit Analog-to-Digital Converter

The MC10319 is an 8–bit high speed parallel flash A/D converter. The device employs an internal Grey Code structure to eliminate large output errors on fast slewing input signals. It is fully TTL compatible, requiring a + 5.0 V supply and a wide tolerance negative supply of – 3.0 to – 6.0 V. Three–state TTL outputs allow direct drive of a data bus or common I/O memory.

The MC10319 contains 256 parallel comparators across a precision input reference network. The comparator outputs are fed to latches and then to an encoder network, to produce an 8–bit data byte plus an overrange bit. The data is latched and converted to 3–state LS–TTL outputs. The overrange bit is always active to allow for either sensing of the overrange condition or ease of interconnecting a pair of devices to produce a 9–bit A/D converter.

Applications include video display and radar processing, high speed instrumentation and TV broadcast encoding.

• Internal Grey Code for Speed and Accuracy, Binary Outputs

• 8–Bit Resolution/9–Bit Typical Accuracy

• Easily Interconnected for 9–Bit Conversion

• 3–State LS–TTL Outputs with True/Complement Enable Inputs

• 25 MHz Sampling Rate

• Wide Input Range: 1.0 to 2.0 Vpp, between ± 2.0 V

• Low Input Capacitance: 50 pF

• Low Power Dissipation: 618 mW

• No Sample/Hold Required for Video Bandwidth Signals

• Single Clock Cycle Conversion