DAC1006/DAC1007/DAC1008
µP Compatible, Double-Buffered D to A Converters
General Description
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
popular microprocessors. These DACs appear as a memory
location or an I/O port to the µP and no interfacing logic is
needed.
These devices, combined with an external amplifier and volt-
age 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 be-
come equally attractive in audio signal processing equip-
ment as audio gain controls or as programmable attenuators
which marry high quality audio signal processing to digitally
based systems under microprocessor control.
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.
The DAC1006 series are the 10-bit members of a family of
microprocessor-compatible DAC’s (MICRO-DAC’s
™
). For
applications requiring other resolutions, the DAC0830 series
(8 bits) and the DAC1208 and DAC1230 (12 bits) are avail-
able alternatives.
Part #
Accuracy
Pin
Description
(bits)
DAC1006
10
For left-
DAC1007
9
20
justified
DAC1008
8
data
Features
n
Uses easy to adjust END POINT specs, NOT BEST
STRAIGHT LINE FIT
n
Low power consumption
n
Direct interface to all popular microprocessors
n
Integrated thin film on CMOS structure
n
Double-buffered, single-buffered or flow through digital
data inputs
n
Loads two 8-bit bytes or a single 10-bit word
n
Logic inputs which meet TTL voltage level specs (1.4V
logic threshold)
n
Works with
±
10V reference — full 4-quadrant
multiplication
n
Operates STAND ALONE (without µP) if desired
n
Available in 0.3" standard 20-pin package
n
Differential non-linearity selection available as special
order
Key Specifications
n
Output Current Settling Time:
500 ns
n
Resolution:
10 bits
n
Linearity:
10, 9, and 8 bits (guaranteed over temp.)
n
Gain Tempco:
−0.0003% of FS/˚C
n
Low Power Dissipation:
20 mW (including ladder)
n
Single Power Supply:
5 to 15 V
DC
Typical Application
MICRO-DAC
™
and BI-FET
™
are trademarks of National Semiconductor Corp.
DAC1006/1007/1008
DS005688-1
*
NOTE: FOR DETAILS OF BUS CONNECTION SEE SECTION 6.0
April 1998
DAC1006/DAC1007/DAC1008
µP
Compatible,
Double-Buffered
D
to
A
Converters
DAC1006/DAC1007/DAC1008
© 1998 National Semiconductor Corporation
DS005688
www.national.com
1
PrintDate=1998/11/17 PrintTime=11:38:07 46711 ds005688 Rev. No. 4
cmserv
Proof
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