a
LC2MOS
+3.3 V/+5 V, Low Power, Quad 12-Bit DAC
AD7564
FEATURES
Four 12-Bit DACs in One Package
4-Quadrant Multiplication
Separate References
Single Supply Operation
Guaranteed Specifications with +3.3 V/+5 V Supply
Low Power
Versatile Serial Interface
Simultaneous Update Capability
Reset Function
28-Pin SOIC, SSOP and DIP Packages
FUNCTIONAL BLOCK DIAGRAM
NC
AGND
V DD
INPUT
LATCH A
DGND
V REF D
12
DAC A
LATCH
12
DAC B
LATCH
V REF C
12
V REFB
VREF A
R FB A
DAC A
IOUT1 A
IOUT2 A
RFB B
INPUT
LATCH B
12
DAC B
IOUT1 B
IOUT2 B
RFB C
INPUT
LATCH C
APPLICATIONS
Process Control
Portable Instrumentation
General Purpose Test Equipment
12
DAC C
LATCH
12
DAC C
IOUT1 C
IOUT2 C
R FBD
INPUT
LATCH D
12
DAC D
LATCH
12
DAC D
12
FSIN
CLKIN
SDIN
IOUT2 D
CLR
CONTROL LOGIC
+
INPUT SHIFT
REGISTER
A0 A1
IOUT1 D
LDAC
AD7564
SDOUT
GENERAL DESCRIPTION
PRODUCT HIGHLIGHTS
The AD7564 contains four 12-bit DACs in one monolithic
device. The DACs are standard current output with separate
VREF, IOUT1, IOUT2 and RFB terminals. These DACs operate from
a single +3.3 V to +5 V supply.
1. The AD7564 contains four 12-bit current output DACs with
separate VREF inputs.
The AD7564 is a serial input device. Data is loaded using
FSIN, CLKIN and SDIN. Two address pins A0 and A1 set up
a device address, and this feature may be used to simplify device
loading in a multi-DAC environment. Alternatively, A0 and A1
can be ignored and the serial out capability used to configure a
daisy-chained system.
All DACs can be simultaneously updated using the asynchronous LDAC input, and they can be cleared by asserting the
asynchronous CLR input.
2. The AD7564 can be operated from a single +3.3 V to +5 V
supply.
3. Simultaneous update capability and reset function are
available.
4. The AD7564 features a fast, versatile serial interface compatible with modern 3 V and 5 V microprocessors and
microcomputers.
5. Low power, 50 µW at 5 V and 33 µW at 3.3 V.
The device is packaged in 28-pin SOIC, SSOP and DIP
packages.
REV. B
Information furnished by Analog Devices is believed to be accurate and
reliable. However, no responsibility is assumed by Analog Devices for its
use, nor for any infringements of patents or other rights of third parties
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.
One Technology Way, P.O. Box 9106, Norwood. MA 02062-9106, U.S.A.
Tel: 781/329-4700
Fax: 781/461-3113
