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Digital Electronics
12.6 Integrated Circuit D/A Converters
This section presents application-relevant information on some of the commonly used D/A converter IC
type numbers, as it is not possible to give a detailed description of each one of them. The type numbers
included for this purpose are DAC-08/0800, DAC-80, DAC-0808, AD 7524 and DAC-1408A/1508A.
12.6.1 DAC-08
DAC-08 is an eight-bit monolithic D/A converter. Its major performance specifications include a
settling time of 85 ns, a monotonic multiplying performance over a wide 20-to-1 reference current
range, a direct interface to all popular logic families, high voltage compliance complementary current
outputs, nonlinearities of ±0.1 % over the entire operating temperature range and a wide power supply
range of ±4.5 V to ±18 V Figures 12.14(a) and (b) respectively show the basic circuit configurations
for positive low impedance output operation and negative low impedance output operation. DAC-08
R L
−
+
I O
I O
4
2
DAC-08
E O
I FR
= 0 to +
R L
I FR.
=
255
256
.I REF
(a)
R L
−
+
I O
I O
4
2
DAC-08
E O
I FR
= 0 to -
R L
I FR.
=
255
256
.I REF
(b)
Figure 12.14 (a) Basic circuit configuration of DAC-08 for positive output operation and (b) the basic circuit
configuration of DAC-08 for negative output operation.