32-Channel, 14-Bit DAC with Precision
Infinite Sample-and-Hold Mode
a
AD5532B*
GENERAL DESCRIPTION
FEATURES
The AD5532B is a 32-channel, voltage output, 14-bit DAC with
an additional precision infinite sample-and-hold mode. The
selected DAC register is written to via the 3-wire serial inter-
face and VOUT for this DAC is then updated to reflect the new
contents of the DAC register. DAC selection is accomplished via
address bits A0–A4. The output voltage range is determined by
the offset voltage at the OFFS_IN pin and the gain of the
output amplifier. It is restricted to a range from VSS + 2 V to
VDD – 2 V because of the headroom of the output amplifier.
High Integration:
32-Channel DAC in 12 mm ꢀ 12 mm CSPBGA
Guaranteed Monotonic to 14 Bits
Infinite Sample-and-Hold Capability to ꢁ0.018% Accuracy
Infinite Sample-and-Hold Total Unadjusted Error ꢁ2.5 mV
Adjustable Voltage Output Range
Readback Capability
DSP/Microcontroller Compatible Serial Interface
Output Impedance 0.5 ꢂ
Output Voltage Span 10 V
Temperature Range –40ꢃC to +85ꢃC
The device is operated with AVCC = +5 V 5%, DVCC = +2.7 V
to +5.25 V, VSS = –4.75 V to –16.5 V, and VDD = +8 V to +16.5 V
and requires a stable 3 V reference on REF_IN as well as an
offset voltage on OFFS_IN.
APPLICATIONS
Automatic Test Equipment
Optical Networks
Level Setting
PRODUCT HIGHLIGHTS
1. 32-channel, 14-bit DAC in one package, guaranteed
monotonic.
Instrumentation
Industrial Control Systems
Data Acquisition
Low Cost I/O
2. The AD5532B is available in a 74-lead CSPBGA with a body
size of 12 mm ꢀ12 mm.
3. In infinite sample-and-hold mode, a total unadjusted error of
2.5 mV is achieved by laser-trimming on-chip resistors.
FUNCTIONAL BLOCK DIAGRAM
DV
AV
REF IN REF OUT
OFFS IN
V
V
SS
CC
CC
DD
AD5532B
V
0
OUT
V
ADC
DAC
IN
TRACK/RESET
BUSY
14-BIT
BUS
V
31
OUT
MUX
DAC
DAC
DAC GND
AGND
OFFS OUT
DGND
MODE
INTERFACE
CONTROL
LOGIC
SER/PAR
ADDRESS INPUT REGISTER
WR
SCLK
D
D
A4–A0
CAL OFFSET_SEL
SYNC/CS
IN
OUT
*Protected by U.S. Patent No. 5,969,657; other patents pending.
REV. A
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reliable. However, no responsibility is assumed by Analog Devices for its
use, norforanyinfringementsofpatentsorotherrightsofthirdpartiesthat
may result from its use. No license is granted by implication or otherwise
under any patent or patent rights of Analog Devices.
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© Analog Devices, Inc., 2002