FEATURES
· 2.7-V to 5.5-V Single Supply
· 12-Bit Linearity and Monotonicity
· Rail-to-Rail Voltage Output
· Settling Time: 5 μs (Max)
· Ultralow Glitch Energy: 0.1 nVs
· Ultralow Crosstalk: –100 dB
· Low Power: 440 μA (Max)
· Per-Channel Power Down: 2 μA (Max)
· Power-On Reset to Midscale
· 2s Complement Input Data Format
· SPI-Compatible Serial Interface: Up to 50 MHz
· Daisy-Chain Capability
· Asynchronous Hardware Clear
· Simultaneous or Sequential Update
· Specified Temperature Range: –40°C to 105°C
· Small 3-mm × 3-mm, 16-Lead QFN Package

APPLICATIONS
· Portable Battery-Powered Instruments
· Digital Gain and Offset Adjustment
· Programmable Voltage and Current Sources
· Programmable Attenuators
· Industrial Process Control

DESCRIPTION
The DAC7553 is a 12-bit, dual-channel,
voltage-output DAC with exceptional linearity and
monotonicity. Its proprietary architecture minimizes
undesired transients such as code-to-code glitch and
channel-to-channel crosstalk. The low-power
DAC7553 operates from a single 2.7-V to 5.5-V
supply. The DAC7553 output amplifiers can drive a
2-kW, 200-pF load rail-to-rail with 5-μs settling time;
the output range is set using an external voltage
reference.
The 3-wire serial interface operates at clock rates up
to 50 MHz and is compatible with SPI, QSPI,
Microwire™, and DSP interface standards. The
outputs of all DACs may be updated simultaneously
or sequentially. The parts incorporate a
power-on-reset circuit to ensure that the DAC outputs
power up at midscale and remain there until a valid
write cycle to the device takes place. The parts
contain a power-down feature that reduces the
current consumption of the device to under 2 μA.
The small size and low-power operation makes the
DAC7553 ideally suited for battery-operated portable
applications. The power consumption is typically
1.5 mW at 5 V, 0.75 mW at 3 V, and reduces to 1 μW
in power-down mode.
The DAC7553 is available in a 16-lead QFN package
and is specified over –40°C to 105°C.