A
L
D
DVANCED
INEAR
EVICES, INC.
ALD1801A/ALD1801B
ALD1801
8 BIT MICROPOWER MULTIPLYING D/A CONVERTER
FEATURES
GENERAL DESCRIPTION
• Low voltage 3V to 12V operation
• Low power 1.8mW max @ 3.3V
• Single supply operation (5V or 3.3V)
• Direct CMOS logic interface
• Complementary current outputs
• Nonlinearity to 0.1% max over
temperature range
The ALD1801 is an 8-bit monolithic current output digital to analog
converterdesignedtoprovidelowpower, lowoperatingvoltageandsimple
operation. It offers industry pin configuration of DAC-08 types, and is
intended for a wide range of digital to analog conversion and control
applications in +5V single power supply and ±5V dual power supply
systems, as well as +3V to +12V battery operated systems. Device
characteristics are specified for +5V single supply and 3.3V dual supply
systems.
• High input impedance
• Low full scale current
• High output impedance
The ALD1801 is manufactured with Advanced Linear Devices’ enhanced
ACMOS silicon gate CMOS process and has been designed to be also
used as a linear cell element in Advanced Linear Devices’ "Function-
Specific"ASIC,asitis fullycompatibleindesign,operation,andmanufacture
with all other linear elements in Advanced Linear Devices’ product family.
PIN CONFIGURATION
N/C
1
2
3
4
5
6
16
15
14
13
12
11
N/C
The ALD1801 is designed with matching between reference and full scale
currents. Digital inputs are standard CMOS logic inputs to provide ease
of interface. Output currents can be directly converted to a voltage output
by using a pair of resistors. When used with ALD’s rail-to-rail output
operational amplifiers such as the ALD1702, full scale output of 0 to +5V
can be easily achieved with single +5V power supply.
I OUT
V
V
V
B
B
B
B
REF-
-
V
REF+
+
I
OUT
MSB B
LSB
1
2
3
8
7
6
5
ORDERING INFORMATION
Operating Temperature Range
B
B
B
-55°C to +125°C
0°C to +70°C
0°C to +70°C
7
8
10
9
16-Pin
16-Pin
16-Pin
4
CERDIP
Package
Small Outline
Package(SOIC)
Plastic Dip
Package
TOP VIEW
DC, PC, SC PACKAGE
ALD1801A DC
ALD1801B DC
ALD1801 DC
ALD1801A SC
ALD1801B SC
ALD1801 SC
ALD1801A PC
ALD1801B PC
ALD1801 PC
* N/C Pin is connected internally. Do not connect externally.
* Contact factory for industrial temperature range
BLOCK DIAGRAM
IOUT
4
2
IOUT
V+
V
REF+
13
14
I
I
I
I
I
I
B8
I
I
B4
B1
B2
B5
B6
B7
B3
V
REF-
15
3
5
1
6
2
9
5
10
6
11
7
12
8
7
3
8
4
B
B
B
B
B
B
B
B
MSB
LSB
© 1998 Advanced Linear Devices, Inc. 415Tasman Drive, Sunnyvale, California 94089 -1706 Tel: (408) 747-1155 Fax: (408) 747-1286 http://www.aldinc.com