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, low-power, 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 power-down mode. The DACx551-Q1 devices are available in a VSSOP-8 package.

1. For all available packages, see the orderable addendum at the end of the data sheet.

Functional Block Diagram