DESCRIPTION…

TheSP7800A is a complete 12-bit sampling A/D converter using state–of–the–art CMOS structures. It contains a complete 12–bit successive approximation A/D converter with internal sample/hold, reference, clock, digital interface for microprocessor control, and three–state output drivers. AC and DC performance are completely specified. Two grades based on linearity and dynamic performance are available to provide the optimum price/performance fit in a wide range of applications.

■ 333k Samples Per Second

■ Standard ±10V and ±5V Input

■ No Missing Codes Over Temperature

■ AC Performance Over Temperature

71.5dB Signal–to–Noise Ratio at Nyquist

85dB Spurious–free Dynamic Range at 49KHz

–81dB Total Harmonic Distortion at 49KHz

■ Internal Sample/Hold, Reference, Clock, and 3-State Outputs

■ Power Dissipation: 90mW

■ 24–Pin Narrow DIP and 24–Lead SOIC

■ Enhanced Single (+5V) Supply Version of ADS7800