AD766

a FEATURES Zero-Chip Interface to Digital Signal Processors Complete DACPORT® On-Chip Voltage Reference Voltage and Current Outputs Serial, Twos-Complement Input ؎3 V Output Sample Rates to 390 kSPS 94 dB Minimum Signal-to-Noise Ratio –81 dB Maximum Total Harmonic Distortion 15-Bit Monotonicity ؎5 V to ؎12 V Operation 16-Pin Plastic and Ceramic Packages Available in Commercial, Industrial, and Military Temperature Ranges APPLICATIONS Digital Signal Processing Noise Cancellation Radar Jamming Automatic Test Equipment Precision Industrial Equipment Waveform Generation 16-Bit DSP DACPORT AD766 FUNCTIONAL BLOCK DIAGRAM PRODUCT DESCRIPTION The AD766 16-bit DSP DACPORT provides a direct, threewire interface to the serial ports of popular DSP processors, including the ADSP-2101, TMS320CXX, and DSP56001. No additional “glue logic” is required. The AD766 is also complete, offering on-chip serial-to-parallel input format conversion, a 16-bit current-steering DAC, voltage reference, and a voltage output op amp. The AD766 is fabricated in Analog Devices’ BiMOS II mixed-signal process which provides bipolar transistors, MOS transistors, and thin-film resistors for precision analog circuits in addition to CMOS devices for logic. The design and layout of the AD766 have been optimized for ac performance and are responsible for its guaranteed and tested 94 dB signal-to-noise ratio to 20 kHz and 79 dB SNR to 250 kHz. Laser-trimming the AD766’s silicon chromium thinfilm resistors reduces tot...