1 Features

• Relative Accuracy: 1 LSB Max
• Differential Nonlinearity: 1 LSB Max
• 2-mA Full-Scale Current ±20%,
  With V_REF = ±10 V
• 0.5-μs Settling Time
• Midscale or Zero-Scale Reset
• Separate 4Q Multiplying Reference Inputs
• Reference Bandwidth: 10 MHz
• Reference Dynamics: –105-dB THD
• SPI™-Compatible 3-Wire Interface:
  50 MHz
• Double Buffered Registers to Enable
  Simultaneous Multichannel Update
• Internal Power-On Reset
• Industry-Standard Pin Configuration

2 Applications

• Automatic Test Equipment
• Instrumentation
• Digitally Controlled Calibration

3 Description

The DAC8812 is a dual, 16-bit, current-output digital-to-analog converter (DAC) designed to operate from a single 2.7-V to 5.5-V supply.

The applied external reference input voltage V_REF determines the full-scale output current. An internal feedback resistor (R_FB) provides temperature tracking for the full-scale output when combined with an external I-to-V precision amplifier.

A double-buffered, serial data interface offers high-speed, 3-wire, SPI and microcontroller compatible inputs using serial data in (SDI), clock (CLK), and a chip-select (CS). A common level-sensitive load DAC strobe (LDAC) input allows simultaneous update of all DAC outputs from previously loaded input registers. Additionally, an internal power-on reset forces the output voltage to zero at system turnon. An MSB pin allows system reset assertion (RS) to force all registers to zero code when MSB = 0, or to midscale code when MSB = 1.

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

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Functional Block Diagram