Digital to Analogue Converters

Digital to analogue converters (also known as DACs) are devices that convert digital signals (e.g. a fixed-point binary number) into an analogue output signal (e.g. a physical quantity, such as voltage or pressure) for other devices to recognise. DACs are mostly in the audio industry, where they are used to convert digital audio signal (binary code) into an analogue signal ready for the next device or headphone amplifier to pick up. The reverse operation (analogue to digital conversion) can be performed by an ADC (analogue to digital converter). We have a curated range of DACs featuring products from well-known brands within the industry, including Analog Devices, Maxim Integrated, Microchip, Texas Instruments, and more.

What does a digital to analogue converter do?

Audio digital to analogue converters capture high-quality digital audio and convert it into a direct line level output analogue signal. An example of this is when digitally-stored music, such as an mp3 track or a CD, is converted into an analogue signal in order to be played through speakers. Video digital to analogue converters operate on a much larger scale and are high-frequency, low- to medium-resolution type converters. They are used to convert digital video data into analogue video signals, especially when using older models of monitors or televisions.

Types of digital to analogue converters

  • R-2R Ladder DACs - These converters are binary converters that use repeating cascaded resistor values R and 2R. Using R-2R improves accuracy.
  • Switched Capacitors - Switched capacitors include a parallel capacitor network.
  • Switched Resistors - Contain a parallel resistor system in which resistors are enabled or bypassed depending on the digital signal.
  • Switched Current Source - Different current sources are chosen based on the digital signal being input.

Applications

Digital to analogue converters are widely used in applications across audio and video industries, including mobile phones, televisions, music players, and telephone calls.

Converters for audio applications include:

  • Digital music systems when played through speakers or headphones
  • PC sound cards
  • ,li>Telecommunications

Video digital to analogue converters have application uses in:

  • Mobile phones
  • TVs

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    Description Price Architecture Resolution Conversion Rate Full Scale Error Integral Nonlinearity Error Number of DAC Channels Mounting Type Package Type Pin Count Maximum Settling Time Digital Interface Type Output Polarity Voltage Reference Power Supply Type
    RS Stock No. 662-1732
    Mfr. Part No.PCM1796DB
    SGD11.37
    Each
    units
    Segmented 24 bit 192ksps 7%FSR ±1dB 2 Surface Mount SSOP 28 - Serial (SPI) Bipolar Internal Dual
    RS Stock No. 796-8859
    Mfr. Part No.AD5696BRUZ
    SGD30.23
    Each
    units
    Resistor String 16 bit - ±0.1%FSR ±2LSB 4 Surface Mount TSSOP 16 8µs Serial (I2C) Unipolar External Single
    RS Stock No. 889-5847
    Mfr. Part No.MCP4726A0T-E/CH
    BrandMicrochip
    SGD1.12
    Each (On a Reel of 3000)
    units
    Resistor String 12 bit - 82LSB 14.5LSB 1 Surface Mount SOT-23 6 6µs Serial (I2C) Unipolar External Single
    RS Stock No. 190-4629
    Mfr. Part No.MAX5217GUA+
    SGD7.745
    Each (In a Tube of 50)
    units
    - 16 bit - - ±4LSB 1 Surface Mount μMAX 8 18µs Serial (I2C) Bipolar, Unipolar External Single
    RS Stock No. 921-5254
    Mfr. Part No.DAC7568IAPW
    SGD22.42
    Each (In a Tube of 90)
    units
    Resistor String 12 bit - ±0.2%FSR 1LSB 8 Surface Mount TSSOP 14 10µs Serial (SPI) Unipolar Internal Single
    RS Stock No. 823-0956
    Mfr. Part No.MCP4706A3T-E/CH
    BrandMicrochip
    SGD1.142
    Each (In a Pack of 10)
    units
    Resistor String 8 bit - 5.2LSB 0.907LSB 1 Surface Mount SOT-23 6 6µs Serial (I2C) Bipolar External Single
    RS Stock No. 823-3680
    Mfr. Part No.MCP4726A3T-E/CH
    BrandMicrochip
    SGD1.45
    Each (In a Pack of 10)
    units
    Resistor String 12 bit - 82LSB 14.5LSB 1 Surface Mount SOT-23 6 6µs Serial (I2C) Bipolar External Single
    RS Stock No. 709-4774
    Mfr. Part No.AD5542BRZ
    SGD38.21
    Each
    units
    R-2R, Resistor String 16 bit 1.5Msps ±7LSB ±2LSB 1 Surface Mount SOIC 14 1µs Serial (SPI/QSPI/Microwire) Bipolar, Unipolar External Single
    RS Stock No. 759-0825
    Mfr. Part No.AD5666ARUZ-2
    SGD25.03
    Each
    units
    Resistor String 16 bit 95ksps -1%FSR ±32LSB 4 Surface Mount TSSOP 14 10µs Serial (SPI) - Internal Single