1FEATURES
2• Bipolar Output: ±3V, up to ±16.5V
• Unipolar Output: 0V to +33V
• 14-Bit Resolution
• Low Power: 13.5mW/Ch
• Relative Accuracy: 1LSB Max
• Flexible User Calibration
• Low Zero/Full-Scale Error
– Before User Calibration: ±2.5 LSB Max
– After User Calibration: ±1 LSB
• Low Glitch: 4nV-s
• Settling Time: 15μs
• Channel Monitor Output
• Programmable Gain: x4, x6
• Programmable Offset
• 14-Bit Parallel Interface:
50MHz (Write Operation)
• Packages: QFN-56 (8mm x 8mm),
TQFP-64 (10mm x 10mm)

APPLICATIONS
• Automatic Test Equipment
• PLC and Industrial Process Control
• Communications

DESCRIPTION
The DAC8228 is a low-power, octal, 14-bit
digital-to-analog converter (DAC). With a 5V
reference, the output can either be a bipolar ±15V
voltage when operating from a dual ±15.5V (or
higher) power supply, or a unipolar 0V to +30V
voltage when operating from a +30.5V power supply.
With a 5.5V reference, the output can be ±16.5V for a
dual ±17V (or higher) power supply, or a unipolar 0V
to +33V voltage when operating from a +33.5V (or
higher) power supply. This DAC provides low-power
operation, good linearity, and low glitch over the
specified temperature range of –40°C to +105°C. This
device is trimmed in manufacturing and has very low
zero and full-scale error. In addition, user calibration
can be performed to achieve ±1 LSB bipolar
zero/full-scale error for a bipolar supply, or ±1 LSB zero-code/full-scale error for a unipolar supply over
the entire signal chain. The output range can be
offset by using the DAC Offset Register.
The DAC8228 features a standard, high-speed, 14-bit
parallel interface that operates at up to 50MHz and is
1.8V, 3V, and 5V logic compatible, to communicate
with a DSP or microprocessor. The eight DACs and
the auxiliary registers are addressed with five address
lines. The device features double-buffered interface
logic. An asynchronous load input (LDAC) transfers
data from the DAC data register to the DAC latch.
The asynchronous CLR input sets the output of all
eight DACs to AGND. The VMON pin is a monitor
output that connects to the individual analog outputs,
the offset DAC, and the reference buffer outputs
through a multiplexer (mux).
The DAC8228 is pin-to-pin compatible with the
DAC8728 (16-bit) and the DAC7728 (12-bit).