AD5532B Datasheet, PDF (1/16 Pages) Analog Devices – 32-Channel, 14-Bit DAC with Precision Infinite Sample-and-Hold Mode

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32-Channel, 14-Bit DAC with Precision
Infinite Sample-and-Hold Mode
AD5532B^*
FEATURES
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 ⍀
Output Voltage Span 10 V
Temperature Range –40؇C to +85؇C
APPLICATIONS
Automatic Test Equipment
Optical Networks
Level Setting
Instrumentation
Industrial Control Systems
Data Acquisition
Low Cost I/O
GENERAL DESCRIPTION
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 V_OUT 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 V_SS + 2 V to
V_DD – 2 V because of the headroom of the output amplifier.
The device is operated with AV_CC = +5 V ± 5%, DV_CC = +2.7 V
to +5.25 V, V_SS = –4.75 V to –16.5 V, and V_DD = +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.
PRODUCT HIGHLIGHTS
1. 32-channel, 14-bit DAC in one package, guaranteed
monotonic.
2. The AD5532B is available in a 74-lead CSPBGA with a body
size of 12 mm Ï« 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_CC AV_CC
REF IN REF OUT OFFS IN
V_DD V_SS
AD5532B
V_IN
TRACK / RESET
BUSY
DAC GND
AGND
DGND
SER /PAR
ADC
MUX
DAC
14-BIT
BUS
DAC
MODE
INTERFACE
CONTROL
LOGIC
DAC
ADDRESS INPUT REGISTER
SCLK D_IN D_OUT
SYNC / CS A4–A0 CAL OFFSET_SEL
V_OUT 0
V_OUT 31
OFFS OUT
WR
*Protected by U.S. Patent No. 5,969,657; other patents pending.
REV. A
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under any patent or patent rights of Analog Devices.
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© Analog Devices, Inc., 2002