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. 411-918
    Mfr. Part No.LTC1665CGN#PBF
    SGD11.33
    Each
    units
    - 8 bit - ±4LSB ±1LSB 8 Surface Mount SSOP 16 30µs Serial Bipolar External Single
    RS Stock No. 709-6474
    Mfr. Part No.AD7537KNZ
    SGD64.72
    Each
    units
    R-2R, Resistor String 12 bit 667ksps ±3LSB ±0.5LSB 2 Through Hole PDIP 24 1.5µs Parallel - External Single
    RS Stock No. 423-765
    Mfr. Part No.LTC2642CDD-16#PBF
    SGD19.02
    Each
    units
    - 16 bit - ±5LSB ±2LSB 1 Surface Mount DFN 10 1µs Serial (SPI/QSPI/Microwire) Unipolar External Single
    RS Stock No. 759-0695
    Mfr. Part No.AD420ARZ-32
    SGD40.24
    Each
    units
    Delta Sigma 16 bit 400sps - ±0.012%FSR 1 Surface Mount SOIC 24 3ns Serial (SPI) Bipolar External Single
    RS Stock No. 378-1926
    Mfr. Part No.DAC7612U
    SGD17.69
    Each
    units
    R-2R, Resistor String 12 bit 130ksps - ±2LSB 2 Surface Mount SOIC 8 7µs Serial (SPI) Unipolar Internal Single
    RS Stock No. 538-7885
    Mfr. Part No.AD7398BRUZ
    SGD30.85
    Each
    units
    R-2R, Resistor String 12 bit 167ksps ±2.5mV ±1.5LSB 4 Surface Mount TSSOP 16 6µs Serial (SPI) Unipolar External Dual, Single
    RS Stock No. 709-5935
    Mfr. Part No.AD5624BRMZ
    SGD15.04
    Each
    units
    Resistor String 12 bit 287ksps ±1%FSR ±1LSB 4 Surface Mount MSOP 10 4.5µs Serial (SPI/QSPI/Microwire) Unipolar External Single
    RS Stock No. 538-6674
    Mfr. Part No.AD5308ARUZ
    SGD9.54
    Each
    units
    Resistor String 8 bit 167ksps ±1.25%FSR ±1LSB 8 Surface Mount TSSOP 16 8µs Serial (SPI/QSPI/Microwire) Unipolar External Single
    RS Stock No. 145-0081
    Mfr. Part No.TLC7524CN
    SGD5.764
    Each (In a Tube of 25)
    units
    R-2R, Resistor String 8 bit 10Msps ±2.5LSB ±0.5LSB 1 Through Hole PDIP 16 0.1µs Parallel - External Single
    RS Stock No. 522-9004
    Mfr. Part No.DAC08CPZ
    SGD6.26
    Each
    units
    Current Steering 8 bit 11.8Msps ±1LSB ±0.39%FSR 1 Through Hole PDIP 16 0.15µs Parallel Unipolar External Dual
    RS Stock No. 810-7714
    Mfr. Part No.AD5683RBRMZ
    SGD12.28
    Each
    units
    Resistor String 16 bit - ±0.075%FSR ±2LSB 1 Surface Mount MSOP 10 7µs Serial (SPI) - Internal Single
    RS Stock No. 912-5271
    Mfr. Part No.MCP48FEB02-E/UN
    BrandMicrochip
    SGD2.132
    Each (In a Pack of 5)
    units
    Resistor String 8 bit - 4.5LSB 0.5LSB 2 Surface Mount MSOP 10 7.8µs - Bipolar External, Internal Single
    RS Stock No. 758-9651
    Mfr. Part No.AD565AJD
    SGD73.16
    Each
    units
    Current Steering 12 bit 4Msps ±1/2LSB - 1 Through Hole CDIP 24 0.25µs Parallel Bipolar - Dual
    RS Stock No. 700-3485
    Mfr. Part No.BU2506FV-E2
    BrandROHM
    SGD6.61
    Each
    units
    R-2R, Resistor String 10 bit - ±25mV ±3.5LSB 8 Surface Mount SSOP 20 20µs Serial (SPI) Unipolar External Single
    RS Stock No. 523-7106
    Mfr. Part No.DAC8412FPZ
    SGD103.35
    Each
    units
    R-2R, Resistor String 12 bit 167ksps ±8LSB ±4LSB 4 Through Hole PDIP 28 10µs Parallel Unipolar External Dual, Single
    RS Stock No. 522-9521
    Mfr. Part No.AD7548JNZ
    SGD49.20
    Each
    units
    R-2R, Resistor String 12 bit - ±6LSB ±1LSB 1 Through Hole PDIP 20 1.5µs Parallel - External Single
    RS Stock No. 823-7922
    Mfr. Part No.MCP4728A1-E/UN
    BrandMicrochip
    SGD3.076
    Each (In a Pack of 5)
    units
    Resistor String 12 bit - - 13LSB 4 Surface Mount MSOP 10 6µs Serial (I2C) Unipolar External, Internal Single
    RS Stock No. 545-7158
    Mfr. Part No.LTC1446CN8#PBF
    SGD23.19
    Each
    units
    R-2R 12 bit - - 5LSB 2 Through Hole PDIP 8 14µs Serial (SPI) Unipolar Internal Single
    RS Stock No. 522-9509
    Mfr. Part No.AD7541AJNZ
    SGD34.07
    Each
    units
    R-2R, Resistor String 12 bit - ±8LSB ±1LSB 1 Through Hole PDIP 18 0.6µs Parallel - External Single
    RS Stock No. 169-8303
    Mfr. Part No.CS4398-CZZ
    SGD16.023
    Each (In a Tube of 50)
    units
    Delta Sigma 24 bit 216ksps - - 2 Surface Mount TSSOP 28 - Serial Bipolar External, Internal Single