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. 145-9361
    Mfr. Part No.MCP4902-E/ST
    BrandMicrochip
    TWD35.40
    Each (In a Tube of 96)
    units
    Resistor String 8 bit - -1%FSR 1LSB 2 Surface Mount TSSOP 14 4.5µs Serial (SPI) Unipolar External Single
    RS Stock No. 806-5513
    Mfr. Part No.AD5791BRUZ
    TWD3,713.00
    Each
    units
    R-2R, Resistor String 20 bit - ±21LSB ±1LSB 1 Surface Mount TSSOP 20 1µs Serial (SPI) Bipolar External, Internal Dual
    RS Stock No. 461-6306
    Mfr. Part No.DAC8532IDGK
    TWD450.00
    Each
    units
    Resistor String 16 bit 93ksps -1%FSR ±0.099%FSR 2 Surface Mount MSOP 8 10µs Serial (SPI/QSPI/Microwire) Unipolar External Single
    RS Stock No. 540-4003
    Mfr. Part No.MAX517ACSA+
    TWD228.00
    Each
    units
    R-2R, Resistor String 8 bit - ±18mV - 1 Surface Mount SOIC 8 6µs Serial (I2C) Unipolar External Single
    RS Stock No. 427-076
    Mfr. Part No.DAC8043AFPZ
    TWD449.00
    Each
    units
    R-2R, Resistor String 12 bit 4Msps ±2LSB ±1LSB 1 Through Hole PDIP 8 1µs Serial (SPI) - External Single
    RS Stock No. 806-5406
    Mfr. Part No.AD5667RBCPZ-R2
    TWD350.00
    Each
    units
    Resistor String 16 bit - ±1LSB ±1LSB 2 Surface Mount LFCSP WD 10 7µs Serial (I2C) Bipolar Internal Single
    RS Stock No. 709-6837
    Mfr. Part No.AD7847ANZ
    TWD1,289.00
    Each
    units
    R-2R, Resistor String 12 bit 250ksps ±5LSB ±1LSB 2 Through Hole PDIP 24 5µs Parallel Unipolar External Dual
    RS Stock No. 183-1986
    Mfr. Part No.AD7943BNZ
    TWD411.00
    Each
    units
    R-2R 12 bit - - - 1 Surface Mount DIP 16 5µs Serial Unipolar External Single
    RS Stock No. 709-8467
    Mfr. Part No.DAC8228FSZ
    TWD564.00
    Each
    units
    R-2R, Resistor String 8 bit 500ksps ±2LSB ±1LSB 2 Surface Mount SOIC W 20 5µs Parallel Unipolar External Single
    RS Stock No. 162-4169
    Mfr. Part No.DAC7611P
    TWD289.30
    Each (In a Tube of 50)
    units
    R-2R, Resistor String 12 bit 132ksps - ±2LSB 1 Through Hole PDIP 8 7µs Serial (SPI) Unipolar Internal Single
    RS Stock No. 190-4631
    Mfr. Part No.MAX522ESA+
    TWD159.70
    Each (In a Tube of 100)
    units
    R-2R 8 bit - - ±1LSB 2 Surface Mount SO 8 70µs SPI Serial - External Single
    RS Stock No. 165-3438
    Mfr. Part No.MCP4802-E/MS
    BrandMicrochip
    TWD38.30
    Each (In a Tube of 100)
    units
    Resistor String 8 bit - ±2%FSR 1LSB 2 Surface Mount MSOP 8 4.5µs Serial (SPI) Bipolar Internal Single
    RS Stock No. 189-9007
    Mfr. Part No.MAX532BCPE+
    TWD586.00
    Each
    units
    R-2R, Resistor String 12 bit - ±7LSB ±1LSB 2 Through Hole PDIP 16 2.5µs Serial (SPI/QSPI/Microwire) Unipolar External Dual
    RS Stock No. 662-1656
    Mfr. Part No.DAC908E
    TWD294.00
    Each
    units
    Segmented 8 bit 200Msps 10%FSR ±0.5LSB 1 Surface Mount TSSOP 28 0.03µs Parallel - External, Internal Single
    RS Stock No. 786-9786
    Mfr. Part No.LTC1257CS8#PBF
    TWD387.00
    Each
    units
    Resistor String 12 bit - ±0.5LSB ±3.5LSB 1 Surface Mount SOIC 8 6µs Serial Unipolar Internal Single
    RS Stock No. 165-2215
    Mfr. Part No.MCP4706A3T-E/CH
    BrandMicrochip
    TWD18.00
    Each (On a Reel of 3000)
    units
    Resistor String 8 bit - 5.2LSB 0.907LSB 1 Surface Mount SOT-23 6 6µs Serial (I2C) Bipolar External Single
    RS Stock No. 190-4609
    Mfr. Part No.MAX1257BETM+
    TWD939.20
    Each (In a Tube of 43)
    units
    - 12 bit - - ±1LSB 16 Surface Mount QFN-EP 48 2µs - Bipolar, Unipolar Internal Single
    RS Stock No. 709-5941
    Mfr. Part No.AD5627BRMZ
    TWD219.00
    Each
    units
    Resistor String 12 bit 333ksps ±1%FSR ±1LSB 2 Surface Mount MSOP 10 4.5µs Serial (I2C) Unipolar External Single
    RS Stock No. 697-7057
    Mfr. Part No.AD7545AKPZ
    TWD678.00
    Each
    units
    R-2R, Resistor String 12 bit - ±4LSB ±0.5LSB 1 Surface Mount PLCC 20 1µs Parallel - External Single
    RS Stock No. 922-2675
    Mfr. Part No.DAC8830ICD
    TWD427.70
    Each (In a Tube of 75)
    units
    R-2R, Resistor String 16 bit 1Msps ±7LSB ±1LSB 1 Surface Mount SOIC 8 1µs Serial (SPI/QSPI/Microwire) Unipolar External Single