Data Conversion Circuits – D/A and A/D Converters
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12.6.4 AD 7524
AD 7524 is an eight-bit monolithic CMOS DAC designed for direct interface to most microprocessors
such as 6800, 8085, Z80, etc. It has an accuracy of 1/8 LSB, with a typical power dissipation of less
than 10 mW. Monotonocity is guaranteed over full operation temperature range. It has a settling time
of 250 ns (typical) for the output current to settle within 1/2 LSB for a supply voltage of +15 V. Its
excellent multiplying characteristics (two or four-quadrant) make AD 7524 an ideal choice for many
microprocessor-controlled gain setting and signal control applications. It has a wide power supply
range of +5 V to +15 V. Figure 12.18 shows the functional diagram which resembles the functional
diagram of any current-output multiplying D/A converter.
12.6.5 DAC-1408/DAC-1508
DAC-1508/1408 is a general-purpose, high-speed multiplying-type eight-bit D/A converter. DAC-1508
is identical to DAC-1408 except for the operational temperature range, which is −55°C to +125 °C in
the case of DAC-1508, as against 0–70 °C for DAC-1408. It is pin and functionally compatible with
DAC-0808.
10K
V REF
(MSB)
(LSB)
10K
10K
20
K
20
K
20
K
20
K
20
K
S-1
S-2
S-3
S-8
OUT-1
OUT-2
R F
10K
Interface Logic
B 6
B 7
B 5
B 0
CS
WR
Figure 12.18 Functional diagram of AD 7524.