REV.B
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AD5304/AD5314/AD5324*
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700 World Wide Web Site: http://www.analog.com
Fax: 781/326-8703 © Analog Devices, Inc., 2000
2.5 V to 5.5 V, 500 H9262A, Quad Voltage Output
8-/10-/12-Bit DACs in 10-Lead microSOIC
FUNCTIONAL BLOCK DIAGRAM
INPUT
REGISTER
V
OUT
ABUFFER
DAC
REGISTER
STRING
DAC A
V
DD REFIN
GND
AD5304/AD5314/AD5324
INPUT
REGISTER
V
OUT
BBUFFER
DAC
REGISTER
INPUT
REGISTER
V
OUT
CBUFFER
DAC
REGISTER
INPUT
REGISTER
V
OUT
DBUFFER
DAC
REGISTER
POWER-ON
RESET
SYNC
SCLK
DIN
INTERFACE
LOGIC
POWER-DOWN
LOGIC
LDAC
STRING
DAC B
STRING
DAC C
STRING
DAC D
FEATURES
AD5304
Four Buffered 8-Bit DACs in 10-Lead microSOIC
AD5314
Four Buffered 10-Bit DACs in 10-Lead microSOIC
AD5324
Four Buffered 12-Bit DACs in 10-Lead microSOIC
Low Power Operation: 500 H9262A @ 3 V, 600 H9262A @ 5 V
2.5 V to 5.5 V Power Supply
Guaranteed Monotonic By Design Over All Codes
Power-Down to 80 nA @ 3 V, 200 nA @ 5 V
Double-Buffered Input Logic
Output Range: 0–V
REF
Power-On-Reset to Zero Volts
Simultaneous Update of Outputs (LDAC Function)
Low Power, SPI™, QSPI™, MICROWIRE™, and
DSP-Compatible 3-Wire Serial Interface
On-Chip Rail-to-Rail Output Buffer Amplifiers
Temperature Range –40H11543C to +105H11543C
APPLICATIONS
Portable Battery-Powered Instruments
Digital Gain and Offset Adjustment
Programmable Voltage and Current Sources
Programmable Attenuators
Industrial Process Control
GENERAL DESCRIPTION
The AD5304/AD5314/AD5324 are quad 8-, 10- and 12-bit
buffered voltage output DACs in a 10-lead microSOIC package
that operate from a single 2.5 V to 5.5 V supply consuming
500 µA at 3 V. Their on-chip output amplifiers allow rail-to-
rail output swing to be achieved with a slew rate of 0.7 V/µs.
A 3-wire serial interface is used which operates at clock rates
up to 30 MHz and is compatible with standard SPI, QSPI,
MICROWIRE and DSP interface standards.
The references for the four DACs are derived from one reference
pin. The outputs of all DACs may be updated simultaneously
using the software LDAC function. The parts incorporate a
power-on-reset circuit that ensures that the DAC outputs power
up to zero volts and remain there until a valid write takes place
to the device. The parts contain a power-down feature that
reduces the current consumption of the device to 200 nA @ 5 V
(80 nA @ 3 V).
The low power consumption of these parts in normal operation
makes them ideally suited to portable battery-operated equipment.
The power consumption is 3 mW at 5 V, 1.5 mW at 3 V, reducing
to 1 µW in power-down mode.
*Protected by U.S. Patent No. 5,969,657; other patents pending.
SPI and QSPI are trademarks of Motorola, Inc.
MICROWIRE is a trademark of National Semiconductor Corporation.