1 Features
• Qualified for Automotive Applications
• AEC-Q100 Qualified With the Following Results:
– Device Temperature Grade 1: –40°C to 125°C
Ambient Operating Temperature Range
– Device HBM ESD Classification Level 2
– Device CDM ESD Classification Level C4B
• Relative Accuracy:
– DAC8551-Q1 (16-Bit): 4 LSB INL
– DAC6551-Q1 (12-Bit): 0.3 LSB INL
• Ultralow Glitch Impulse: 0.1 nV-s
• Settling Time: 8 μs to ±0.003% FSR
• Power Supply: 3 V to 5.5 V
• Power-On Reset to Zero Scale
• MicroPower Operation: 160 μA at 5 V
• Low-Power Serial Interface With Schmitt-
Triggered Inputs
• On-Chip Output Buffer Amplifier With Rail-to-Rail
Operation
• Power-Down Capability
• Binary Input
• SYNC Interrupt Facility
• Available in a Tiny VSSOP-8 Package

2 Applications
• Automotive Radar
• Automotive Sensors

3 Description
The DAC8551-Q1 and DAC6551-Q1 are small, lowpower,
voltage-output, 16- and 12-bit digital-to-analog
converters (DACs) qualified for automotive
applications. The DACx551-Q1 devices provide good
linearity and minimize undesired code-to-code
transient voltages. The devices use a versatile 3-wire
serial interface that operates at clock rates to 30 MHz
and is compatible with standard SPI, QSPI,
Microwire, and digital signal-processor (DSP)
interfaces.
The DACx551-Q1 devices require an external
reference voltage to set the output range. The
devices incorporate a power-on-reset circuit that
ensures the DAC output powers up at 0 V and
remains there until a valid write to the device takes
place. The devices contain a power-down feature,
accessed over the serial interface, that reduces the
current consumption to 800 nA at 5 V.
The DACx551-Q1 devices power consumption is only
800 μW at 5 V, reducing to less than 4 μW in powerdown
mode. The DACx551-Q1 devices are available
in a VSSOP-8 package.