January 1995
DAC1006/DAC1007/DAC1008 mP Compatible,
Double-Buffered D to A Converters
General Description
Features
Y
Uses easy to adjust END POINT specs, NOT BEST
STRAIGHT LINE FIT
The DAC1006/7/8 are advanced CMOS/Si-Cr 10-, 9- and
8-bit accurate multiplying DACs which are designed to inter-
face directly with the 8080, 8048, 8085, Z-80 and other pop-
ular microprocessors. These DACs appear as a memory lo-
cation or an I/O port to the mP and no interfacing logic is
needed.
Y
Y
Y
Y
Low power consumption
Direct interface to all popular microprocessors
Integrated thin film on CMOS structure
Double-buffered, single-buffered or flow through digital
data inputs
These devices, combined with an external amplifier and
voltage reference, can be used as standard D/A converters;
and they are very attractive for multiplying applications
(such as digitally controlled gain blocks) since their linearity
error is essentially independent of the voltage reference.
They become equally attractive in audio signal processing
equipment as audio gain controls or as programmable at-
tenuators which marry high quality audio signal processing
to digitally based systems under microprocessor control.
Y
Y
Loads two 8-bit bytes or a single 10-bit word
Logic inputs which meet TTL voltage level specs (1.4V
logic threshold)
Y
g
Works with 10V referenceÐfull 4-quadrant multiplica-
tion
Y
Y
Y
Operates STAND ALONE (without mP) if desired
Available in 0.3 standard 20-pin package
×
Differential non-linearity selection available as special
order
All of these DACs are double buffered. They can load all 10
bits or two 8-bit bytes and the data format is left justified.
The analog section of these DACs is essentially the same
as that of the DAC1020.
Key Specifications
Y
Output Current Settling Time
500 ns
10 bits
The DAC1006 series are the 10-bit members of a family of
microprocessor-compatible DAC’s (MICRO-DACTM’s). For
applications requiring other resolutions, the DAC0830 series
(8 bits) and the DAC1208 and DAC1230 (12 bits) are avail-
able alternatives.
Y
Resolution
Y
Linearity
10, 9, and 8 bits
(guaranteed over temp.)
Y
b
Gain Tempco
0.0003% of FS/ C
§
20 mW
Y
Low Power Dissipation
Accuracy
(including ladder)
Ý
Part
Pin Description
(bits)
Y
Single Power Supply
5 to 15 V
DC
DAC1006
DAC1007
DAC1008
10
9
For left-
20
justified
data
8
MICRO-DACTM and BI-FETTM are trademarks of National Semiconductor Corp.
Typical Application
DAC1006/1007/1008
* NOTE: FOR DETAILS OF BUS
CONNECTION SEE SECTION 6.0
TL/H/5688–1
C
1995 National Semiconductor Corporation
TL/H/5688
RRD-B30M115/Printed in U. S. A.