AD7846BPZ

AD7846BPZ is a LC²MOS 16bit voltage output DAC. The DAC uses a segmented architecture. The four MSBs in the DAC latch select one of the segments in a 16-resistor string. Both taps of the segment are buffered by amplifiers and fed to a 12bit DAC, which provides a further 12 bits of resolution. This architecture ensures 16bit monotonicity. Excellent integral linearity results from tight matching between the input offset voltages of the two buffer amplifiers. In addition to the excellent accuracy specifications, the AD7846 also offers a comprehensive microprocessor interface. There are 16 data I/O pins, plus control lines (active-low CS, R/W, active-low LDAC and active-low CLR). R/W and CS allow writing to and reading from the I/O latch.

• 16bit monotonicity over temperature, multiplying capability
• Microprocessor compatible with readback capability
• Differential nonlinearity error is ±0.5LSB max at (VDD = +14.25V to +15.75V)
• Gain error at +25°C is ±6LSB typical at (VOUT load = 10Mohm, VDD = +14.25V to +15.75V)
• Power dissipation is 100mW typical at (VDD = +14.25V to +15.75V)
• Output settling time is 6μs maximum at (to 0.006% FSR, VOUT loaded)
• Slew rate is 7V/μs typical at (VREF+ = +5V; VDD = +14.25V to +15.75V)
• Output noise voltage density is 50nV/√Hz typ at (VREF+ = +5V; VDD = +14.25V to +15.75V)
• Short circuit current is ±25mA typical at (VDD = +14.25V to +15.75V)
• Operating temperature range from -40°C to +85°C, 28-lead PLCC package

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ADI products are only authorized (and sold) for use by the customer and are not to be resold or otherwise passed on to any third party