A
DVANCED
L
INEAR
D
EVICES,
I
NC.
ALD1801A/ALD1801B
ALD1801
8 BIT MICROPOWER MULTIPLYING D/A CONVERTER
GENERAL DESCRIPTION
The ALD1801 is an 8-bit monolithic current output digital to analog
converter designed to provide low power, low operating voltage and simple
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.
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, as it is fully compatible in design, operation, and manufacture
with all other linear elements in Advanced Linear Devices’ product family.
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.
ORDERING INFORMATION
Operating Temperature Range
-55°C to +125°C
0°C to +70°C
0°C to +70°C
16-Pin
CERDIP
Package
ALD1801A DC
ALD1801B DC
ALD1801 DC
16-Pin
Small Outline
Package(SOIC)
ALD1801A SC
ALD1801B SC
ALD1801 SC
16-Pin
Plastic Dip
Package
ALD1801A PC
ALD1801B PC
ALD1801 PC
FEATURES
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
• High input impedance
• Low full scale current
• High output impedance
PIN CONFIGURATION
•
•
•
•
•
•
N/C
I OUT
V-
I
OUT
MSB B
1
B
2
B
3
B
4
1
16
N/C
V
REF-
V
REF+
V+
B
8
LSB
B
7
B
6
B
5
2
15
3
14
4
13
5
6
12
11
7
8
10
9
TOP VIEW
DC, PC, SC PACKAGE
* N/C Pin is connected internally. Do not connect externally.
* Contact factory for industrial temperature range
BLOCK DIAGRAM
4
2
V
REF+
14
V+
13
I
B1
V
REF-
15
3
I
B2
I
B3
I
B4
I
B5
I
B6
I
B7
I
B8
IOUT
IOUT
5
B
1
MSB
6
B
2
7
B
3
8
B
4
9
B
5
10
B
6
11
B
7
12
B
8
LSB
© 1998 Advanced Linear Devices, Inc. 415 Tasman Drive, Sunnyvale, California 94089 -1706 Tel: (408) 747-1155 Fax: (408) 747-1286 http://www.aldinc.com
ALD [ ADVANCED LINEAR DEVICES ]
