REV. A
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a
Quad 8-Bit Multiplying CMOS
D/A Converter with Memory
DAC8408
A common 8-bit TTL/CMOS compatible input port is used to
load data into any of the four DAC data-latches. Control lines
DS1, DS2, and A/B determine which DAC will accept data.
Data loading is similar to that of a RAMs write cycle. Data can
be read back onto the same data bus with control line R/
W. The
DAC8408 is bus compatible with most 8-bit microprocessors,
including the 6800, 8080, 8085, and Z80. The DAC8408 oper-
ates on a single +5 volt supply and dissipates less than 20 mW.
The DAC8408 is manufactured using PMI’s highly stable,
thin-film resistors on an advanced oxide-isolated, silicon-gate,
CMOS process. PMI’s improved latch-up resistant design elimi-
nates the need for external protective Schottky diodes.
ORDERING INFORMATION
1
Temperature Package
Model INL DNL Range Description
DAC8408GP ±1/4 LSB ±1/2 LSB 0°C to +70°C 28-Pin Plastic DIP
DAC8408ET ±1/4 LSB ±1/2 LSB –40°C to +85°C 28-Pin Cerdip
DAC8408AT
2
±1/4 LSB ±1/2 LSB –55°C to +125°C 28-Pin Cerdip
DAC8408FT ±1/2 LSB ±1 LSB –40°C to +85°C 28-Pin Cerdip
DAC8408BT
2
±1/2 LSB ±1 LSB –55°C to +125°C 28-Pin Cerdip
DAC8408FPC
3
±1/2 LSB ±1 LSB –40°C to +85°C 28-Contact PLCC
DAC8408FS ±1/2 LSB ±1 LSB –40°C to +85°C 28-Pin SOL
DAC8408FP ±1/2 LSB ±1 LSB –40°C to +85°C 28-Pin Plastic DIP
NOTES
1
Burn-in is available on commercial and industrial temperature range parts
in cerdip, plastic DIP, and TO-can packages. For outline information see Pack-
age Information section.
2
For devices processed in total compliance to MIL-STD-883, add /883 after
part number. Consult factory for 883 data sheet.
3
For availability and burn-in information on SO and PLCC packages, contact
your local sales office.
FEATURES
Four DACs in a 28 Pin, 0.6 Inch Wide DIP or 28-Pin JEDEC
Plastic Chip Carrier
61/4 LSB Endpoint Linearity
Guaranteed Monotonic
DACs Matched to Within 1%
Microprocessor Compatible
Read/Write Capability (with Memory)
TTL/CMOS Compatible
Four-Quadrant Multiplication
Single-Supply Operation (+5 V)
Low Power Consumption
Latch-Up Resistant
Available In Die Form
APPLICATIONS
Voltage Set Points in Automatic Test Equipment
Systems Requiring Data Access for Self-Diagnostics
Industrial Automation
Multichannel Microprocessor-Controlled Systems
Digitally Controlled Op Amp Offset Adjustment
Process Control
Digital Attenuators
GENERAL DESCRIPTION
The DAC8408 is a monolithic quad 8-bit multiplying digital-to-
analog CMOS converter. Each DAC has its own reference input,
feedback resistor, and onboard data latches that feature
read/write capability. The readback function serves as memory
for those systems requiring self-diagnostics.
FUNCTIONAL BLOCK DIAGRAM
DAC8408
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 617/329-4700 Fax: 617/326-8703
