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Low-Cost, Triple, 8-Bit Voltage-Output DACs with Serial Interface

Triple, Serial, Voltage-Output DACS in a SO Package

Product Details

Key Features

Parametric specs for Precision DACs (< 1MHz)
Resolution (bits) 8
# Channels 3
Interface Serial - SPI
Output Type Voltage- Buffered
Reference Ext.
INL (±LSB) (max) 1.5
Supply Range (V) (min) 4.5
Supply Range (V) (max) 5.5
ICC (mA) (max) 2.8
Settling Time (µs) (typ) 70
Package/Pins PDIP/14
SOIC (N)/14
Oper. Temp. (°C) -55 to +125
-40 to +85
0 to +70
Budgetary
Price (See Notes)
4.41
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Simplified Block Diagram

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Parameters

Parametric specs for Precision DACs (&lt; 1MHz)
Resolution (bits) 8
# Channels 3
Interface Serial - SPI
Output Type Voltage- Buffered
Reference Ext.
INL (±LSB) (max) 1.5
Supply Range (V) (min) 4.5
Supply Range (V) (max) 5.5
ICC (mA) (max) 2.8
Settling Time (µs) (typ) 70
Package/Pins PDIP/14
SOIC (N)/14
Oper. Temp. (°C) -55 to +125
-40 to +85
0 to +70
Budgetary
Price (See Notes)
4.41

Key Features

  • Operate from a Single +5V (MAX512) or +3V (MAX513) Supply, or from Bipolar Supplies
  • Low Power Consumption
    • 1mA Operating Current
    • <1µA Shutdown Current
  • Unipolar or Bipolar Outputs
  • 5MHz, 3-Wire Serial Interface
  • SPI, QSPI, and Microwire Compatible
  • Two Buffered, Bipolar-Output DACs (DACs A/B)
  • Independently Programmable Shutdown Mode
  • Space-Saving 14-Pin SO/DIP Packages
  • Pin and Software Reset

Applications/Uses

  • Digital Gain and Offset Control
  • Programmable Attenuators
  • Programmable Current Sources
  • Programmable Voltage Sources
  • RF Digitally Adjustable Bias Circuits
  • VCO Tuning

Description

The MAX512/MAX513 contain three 8-bit, voltage-output digital-to-analog converters (DAC A, DAC B, and DAC C). Output buffer amplifiers for DACs A and B provide voltage outputs while reducing external component count. The output buffer for DAC A can source or sink 5mA to within 0.5V of VDD or VSS. The buffer for DAC B can source or sink 0.5mA to within 0.5V of VDD or VSS. DAC C is unbuffered, providing a third voltage output with increased accuracy. The MAX512 operates with a single +5V ±10% supply, and the MAX513 operates with a +2.7V to +3.6V supply. Both devices can also operate with split supplies.

The 3-wire serial interface has a maximum operating frequency of 5MHz and is compatible with SPI™, QSPI™, and Microwire™. The serial input shift register is 16 bits long and consists of 8 bits of DAC input data and 8 bits for DAC selection and shutdown. DAC registers can be loaded independently or in parallel at the positive edge of CS. A latched logic output is also available for auxiliary control.

Ultra-low power consumption and small packages (14-pin DIP/SO) make the MAX512/MAX513 ideal for portable and battery-powered applications. Supply current is only 1mA, dropping to less than 1µA in shutdown. Any of the three DACs can be independently shut down. In shutdown mode, the DAC's R-2R ladder network is disconnected from the reference input, minimizing system power consumption.

Simplified Block Diagram

MAX512, MAX513: Functional Diagram MAX512, MAX513: 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 .