1 Features

• Relative Accuracy: 8LSB
• Glitch Energy: 0.1 nV-s
• MicroPower Operation: 140 μA at 2.7 V
• Power-On Reset to Zero
• Power Supply: 2.7 V to 5.5 V
• 16-Bit Monotonic
• Settling Time: 10 μs to ±0.003% FSR
• 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
• Drop-In Compatible With DAC85x1
  and DAC8550 (2's Complement Input)

2 Applications

• Process Control
• Data Acquisition Systems
• Closed-Loop Servo-Control
• PC Peripherals
• Portable Instrumentation
• Programmable Attenuation

3 Description

The DAC8551 is a small, low-power, voltage output, 16-bit digital-to-analog converter (DAC). It is monotonic, provides good linearity, and minimizes undesired code-to-code transient voltages. The DAC8551 uses 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 DAC8551 requires an external reference voltage to set its output range. The DAC8551 incorporates a power-on-reset circuit that ensures the DAC output powers up at 0 V and remains there until a valid write takes place to the device. The DAC8551 contains a power-down feature, accessed over the serial interface, that reduces the current consumption of the device to 200 nA at 5 V.

The low-power consumption of this device in normal operation makes it ideally suited for portable, battery-operated equipment. The power consumption is 0.38 mW at 2.7 V, reducing to less than 1 μW in power‑down mode.

For additional flexibilty, see the DAC8550 (SLAS476), a 2's complement-input counterpart to the DAC8551.

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

Functional Block Diagram