Infinite Sample-and-Hold Capability to ؎0.018% Accuracy
Infinite Sample-and-Hold Total Unadjusted Error ؎2.5 m V
32-Channel DAC in 12 mm ؋ 12 mm CSPBGA
Per Channel Acquisition Time of 16 s Max
Adjustable Voltage Output Range
Output Impedance 0.5 ⍀
Output Voltage Span 10 V
DSP/Microcontroller Compatible Serial Interface
Temperature Range –40؇C to +85؇C
Automatic Test Equipment
Industrial Control Systems
Low Cost I/O
The AD5533B combines a 32-channel voltage translation function
with an infinite output hold capability. An analog input voltage on
the common input pin, VIN, is sampled and its digital represen-
tation transferred to a chosen DAC register. VOUT for this DAC
is then updated to reflect the new contents of the DAC register.
Channel selection is accomplished via the parallel address inputs
A0–A4 or via the serial input port. 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.
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.
1. Precision infinite droopless sample-and-hold capability.
2. The AD5533B is available in a 74-lead CSPBGA with a
body size of 12 mm ϫ 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
REF IN REF OUT OFFS IN
TRACK / RESET
SER / PAR
SCLK DIN DOUT
ADDRESS INPUT REGISTER
SYNC/CS A4 –A0 CAL OFFSET SEL
*Protected by U.S. Patent No. 5,969,657; other patents pending.
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 that
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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