2.5 V to 5.5 V, Parallel Interface
Octal Voltage Output 8-/10-/12-Bit DACs
AD5346: octal 8-bit DAC
The AD5346/AD5347/AD53481 are octal 8-, 10-, and 12-bit
AD5347: octal 10-bit DAC
DACs, operating from a 2.5 V to 5.5 V supply. These devices
AD5348: octal 12-bit DAC
incorporate an on-chip output buffer that can drive the output
Low power operation: 1.4 mA (max) at 3.6 V
to both supply rails, and also allow a choice of buffered or
Power-down to 120 nA at 3 V, 400 nA at 5 V
unbuffered reference input.
Guaranteed monotonic by design over all codes
Rail-to-rail output range: 0 V to VREF or 0 V to 2 × VREF
Power-on reset to 0 V
Simultaneous update of DAC outputs via LDAC pin
Asynchronous CLR facility
The AD5346/AD5347/AD5348 have a parallel interface. CS
selects the device and data is loaded into the input registers on
the rising edge of WR. A readback feature allows the internal
DAC registers to be read back through the digital port.
The GAIN pin on these devices allows the output range to be
Buffered/unbuffered reference inputs
set at 0 V to VREF or 0 V to 2 × VREF.
20 ns WR time
38-lead TSSOP/6 mm × 6 mm 40-lead LFCSP packaging
Temperature range: –40°C to +105°C
Portable battery-powered instruments
Digital gain and offset adjustment
Programmable voltage and current sources
Automatic test equipment
Input data to the DACs is double-buffered, allowing simultane-
ous update of multiple DACs in a system using the LDAC pin.
An asynchronous CLR input is also provided, which resets the
contents of the input register and the DAC register to all zeros.
These devices also incorporate a power-on reset circuit that
ensures that the DAC output powers on to 0 V and remains
there until valid data is written to the device.
All three parts are pin compatible, which allows users to select
the amount of resolution appropriate for their application
without redesigning their circuit board.
Industrial process control
FUNCTIONAL BLOCK DIAGRAM
VDD AGND DGND
1 Protected by U.S. Patent No. 5,969,657.
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