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10-Bit, Low-Power, Dual, Voltage-Output DAC with Serial Interface

Product Details

Key Features

Parametric specs for Precision DACs (< 1MHz)
Resolution (bits) 10
# Channels 2
Interface Serial - SPI
Output Type Voltage- Buffered
Reference Ext.
INL (±LSB) (max) 4
Supply Range (V) (min) 2.7
Supply Range (V) (max) 5.5
ICC (mA) (max) 0.215
Settling Time (µs) (typ) 4
Package/Pins UMAX/8
Oper. Temp. (°C) -40 to +85
-40 to +125
Budgetary
Price (See Notes)
3.16
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Simplified Block Diagram

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Parameters

Parametric specs for Precision DACs (&lt; 1MHz)
Resolution (bits) 10
# Channels 2
Interface Serial - SPI
Output Type Voltage- Buffered
Reference Ext.
INL (±LSB) (max) 4
Supply Range (V) (min) 2.7
Supply Range (V) (max) 5.5
ICC (mA) (max) 0.215
Settling Time (µs) (typ) 4
Package/Pins UMAX/8
Oper. Temp. (°C) -40 to +85
-40 to +125
Budgetary
Price (See Notes)
3.16

Key Features

  • Ultra-Low Power Consumption
    • 112µA at VDD = +3.6V
    • 135µA at VDD = +5.5V
  • Wide +2.7V to +5.5V Single-Supply Range
  • Tiny 8-Pin µMAX Package
  • 0.3µA Power-Down Current
  • Guaranteed 10-Bit Monotonicity (±1 LSB DNL)
  • Safe Power-Up Reset to Zero Volts at DAC Output
  • Three Software Selectable Power-Down Impedances (100kΩ, 1kΩ, Hi-Z)
  • Fast 20MHz, 3-Wire SPI, QSPI, and MICROWIRE-Compatible Serial Interface
  • Rail-to-Rail Output Buffer Amplifiers
  • Schmitt-Triggered Logic Inputs for Direct Interface to Optocouplers
  • Wide -40°C to +125°C Operating Temperature Range

Applications/Uses

  • Automatic Tuning
  • Battery-Powered Instruments
  • Gain and Offset Adjustment
  • Power Amplifier Control
  • Process-Control I/O Boards
  • VCO Control

Description

The MAX5721 dual 10-bit, low-power, buffered voltage-output, digital-to-analog converter (DAC) is packaged in a space-saving 8-pin µMAX® package (5mm x 3mm). The wide supply voltage range of +2.7V to +5.5V and 112µA supply current accommodate low-power and low-voltage applications. DAC outputs employ on-chip precision output amplifiers that swing rail-to-rail. The MAX5721's reference input accepts a voltage range from 0 to VDD. In power-down the reference input is high impedance, further reducing the system's total power consumption.

The 20MHz, 3-wire SPI™, QSPI™, MICROWIRE™ and DSP-compatible serial interface saves board space and reduces the complexity of opto- and transformer-isolated applications. The MAX5721 on-chip power-on reset (POR) circuit resets the DAC outputs to zero and loads the output with a 100kΩ resistor to ground. This provides additional safety for applications that drive valves or other transducers that need to be off on power-up. The MAX5721's software-controlled power-down reduces supply current to less than 0.3µA and provides software-selectable output loads (1kΩ , 100kΩ , or high impedance) while in power-down. The MAX5721 is specified over the -40°C to +125°C automotive temperature range

Simplified Block Diagram

MAX5721: Functional Diagram MAX5721: Functional Diagram Zoom icon

Technical Docs

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .