AD7840ARSZ

AD7840ARSZ is a LC²MOS fast, complete 14bit voltage output D/A converter (DAC). It consists of a 14bit DAC, 3V buried zener reference, DAC output amplifier and high speed control logic. The part features double-buffered interface logic with a 14bit input latch and 14bit DAC latch. Data is loaded to the input latch in either of two modes, parallel or serial. This data is then transferred to the DAC latch under control of an asynchronous active-low LDAC signal. A fast data setup time of 21ns allows direct parallel interfacing to digital signal processors and high speed 16bit microprocessors. In the serial mode, the maximum serial data clock rate can be as high as 6MHz. It is fabricated in linear compatible CMOS (LC²MOS), an advanced, mixed technology process that combines precision bipolar circuits with low power CMOS logic.

• Parallel and serial interface capability, interfaces to high speed DSP processors
• 45ns min active-low WR pulse width, operates from ±5V supplies
• Dynamic specifications for DSP users, fast, versatile microprocessor interface
• Signal to noise ratio is 76dB min (VOUT=1KHz sine wave, fSAMPLE=100KHz)
• Reference input is 2.85V min ( 3V ±5%, VDD=+5V ±5%, VSS=–5V ±5%, AGND=DGND=0V)
• Short-circuit current is 20mA typ (VDD=+5V ±5%, VSS=–5V ±5%, AGND=DGND=0V)
• Digital-to-analogue glitch impulse is 10nV secs typ (VDD=+5V ±5%, VSS=–5V ±5%, AGND=DGND=0V)
• Output voltage is ±3V nominal (VDD=+5V ±5%, VSS=–5V ±5%, AGND=DGND=0V)
• Power dissipation is 100mW max (VDD=+5V ±5%, VSS=–5V ±5%, AGND=DGND=0V)
• Temperature rating range from -25°C to +85°C

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