The AD5744/64 is a quad, 14/16-bit serial input, voltage output
digital-to analog converter that operates from supply voltages of
±12 V up to ±15 V. Nominal full-scale output range is ±10 V,
provided are integrated output amplifiers, reference buffers,
internal reference, and proprietary power-up/power-down
control circuitry. It also features a digital I/O port that may be
programmed via the serial interface, and an analog temperature
sensor. The part incorporates digital offset and gain adjust
registers per channel.
The AD5744/64 is a high performance converter that offers
guaranteed monotonicity, integral nonlinearity (INL) of ±1 LSB,
low noise and 10 μs settling time and includes an on-chip 5 V
reference with a reference tempco of 10 ppm/°C max. During
power-up (when the supply voltages are changing), Vout is
clamped to 0V via a low impedance path.
The AD5744/64 uses a serial interface that operates at clock rates
of up to 30 MHz and is compatible with DSP and microcontroller
interface standards. Double buffering allows the simultaneous
updating of all DACs. The input coding is programmable to either
twos complement or Offset binary formats. The asynchronous
clear function clears all DAC registers to either bipolar zero or
zero-scale depending on the coding used. The AD5744/64 is ideal
for both closed-loop servo control and open-loop control
applications. The AD5744/64 is available in a 32-lead TQFP
package, and offers guaranteed specifications over the ?40°C to
+85°C industrial temperature range. See functional block
diagram, Figure 1.