5 V, Serial-Input
Voltage-Output, 16-Bit DACs
a
AD5541/AD5542
FEATURES
FUNCTIONAL BLOCK DIAGRAMS
Full 16-Bit Performance
5 V Single Supply Operation
Low Power
V
DD
AD5541
Short Settling Time
V
16-BIT DAC
Unbuffered Voltage Output Capable of Driving 60 k⍀
Loads Directly
REF
OUT
SPI™/QSPI™/MICROWIRE™-Compatible Interface
Standards
AGND
16-BIT DATA LATCH
CS
Power-On Reset Clears DAC Output to 0 V (Unipolar
Mode)
Schmitt Trigger Inputs for Direct Optocoupler Interface
DIN
CONTROL
LOGIC
SCLK
SERIAL INPUT REGISTER
DGND
APPLICATIONS
Digital Gain and Offset Adjustment
Automatic Test Equipment
Data Acquisition Systems
Industrial Process Control
V
DD
R
FB
AD5542
RFB
INV
R
INV
REFF
16-BIT DAC
V
OUT
REFS
AGNDF
AGNDS
GENERAL DESCRIPTION
CS
16-BIT DATA LATCH
The AD5541 and AD5542 are single, 16-bit, serial input,
voltage output DACs that operate from a single 5 V ± 10%
supply.
LDAC
CONTROL
LOGIC
SCLK
SERIAL INPUT REGISTER
DGND
DIN
The AD5541 and AD5542 utilize a versatile 3-wire interface that
is compatible with SPI, QSPI, MICROWIRE, and DSP inter-
face standards.
These DACs provide 16-bit performance without any adjust-
ments. The DAC output is unbuffered, which reduces power
consumption and offset errors contributed to by an output buffer.
PRODUCT HIGHLIGHTS
1. Single Supply Operation.
The AD5541 and AD5542 are fully specified and guaranteed
for a single 5 V ± 10% supply.
The AD5542 can be operated in bipolar mode generating a
±VREF output swing. The AD5542 also includes Kelvin sense
connections for the reference and analog ground pins to reduce
layout sensitivity.
2. Low Power Consumption.
These parts consume typically 1.5 mW with a 5 V supply.
3. 3-Wire Serial Interface.
The AD5541 and AD5542 are available in an SO package.
4. Unbuffered output capable of driving 60 kΩ loads.
This reduces power consumption as there is no internal buffer
to drive.
5. Power-On Reset circuitry.
SPI and QSPI are trademarks of Motorola, Inc.
MICROWIRE is a trademark of National Semiconductor Corporation.
REV. A
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: 781/326-8703
World Wide Web Site: http://www.analog.com
© Analog Devices, Inc., 1999