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. 770-9798
    Mfr. Part No.MCP4821-E/P
    BrandMicrochip
    £1.935
    Each (In a Pack of 2)
    Units
    Resistor String 12 bit - 12LSB ±12LSB 1 Through Hole PDIP 8 4.5µs Serial (SPI) Bipolar Internal Single
    RS Stock No. 823-0959
    Mfr. Part No.MCP4716A1T-E/CH
    BrandMicrochip
    £0.651
    Each (In a Pack of 10)
    Units
    Resistor String 10 bit - 20.5LSB 3.625LSB 1 Surface Mount SOT-23 6 6µs Serial (I2C) Bipolar External Single
    RS Stock No. 709-5890
    Mfr. Part No.AD5440YRUZ
    £6.53
    Each
    Units
    R-2R, Resistor String 10 bit 21.3Msps ±25mV ±0.5LSB 2 Surface Mount TSSOP 24 0.12µs Parallel - External Single
    RS Stock No. 709-5888
    Mfr. Part No.AD5420AREZ
    £8.37
    Each
    Units
    R-2R, Resistor String 16 bit - ±0.2%FSR ±0.024%FSR 1 Surface Mount TSSOP 24 40µs Serial (SPI/QSPI/Microwire) Unipolar External, Internal Single
    RS Stock No. 822-5799
    Mfr. Part No.LTC1595CCS8#PBF
    £17.05
    Each
    Units
    R-2R 16 bit - ±1LSB ±4LSB 1 Surface Mount SOIC 8 1µs Serial (SPI/Microwire) Bipolar, Unipolar Internal Single
    RS Stock No. 165-2216
    Mfr. Part No.MCP4716A1T-E/CH
    BrandMicrochip
    £0.473
    Each (On a Reel of 3000)
    Units
    Resistor String 10 bit - 20.5LSB 3.625LSB 1 Surface Mount SOT-23 6 6µs Serial (I2C) Bipolar External Single
    RS Stock No. 806-5355
    Mfr. Part No.AD5504BRUZ
    £15.45
    Each
    Units
    Resistor String 12 bit - +275mV ±3LSB 4 Surface Mount TSSOP 16 55µs Serial (SPI/QSPI/Microwire) - Internal Single
    RS Stock No. 669-6294
    Mfr. Part No.MCP4822-E/MS
    BrandMicrochip
    £2.405
    Each (In a Pack of 2)
    Units
    Resistor String 12 bit - ±2%FSR ±12LSB 2 Surface Mount MSOP 8 4.5µs Serial (SPI/Microwire) Unipolar Internal Single
    RS Stock No. 709-5941
    Mfr. Part No.AD5627BRMZ
    £4.64
    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. 145-9359
    Mfr. Part No.MCP4902-E/P
    BrandMicrochip
    £0.585
    Each (In a Tube of 30)
    Units
    Resistor String 8 bit - -1%FSR 1LSB 2 Through Hole PDIP 14 4.5µs Serial (SPI) Unipolar External Single
    RS Stock No. 726-3876
    Mfr. Part No.MCP4902-E/P
    BrandMicrochip
    £0.288
    Each (In a Pack of 5)
    Units
    Resistor String 8 bit - -1%FSR 1LSB 2 Through Hole PDIP 14 4.5µs Serial (SPI) Unipolar External Single
    RS Stock No. 538-4139
    Mfr. Part No.AD7846JNZ
    £46.62
    Each
    Units
    Resistor String 16 bit 143ksps ±16LSB ±16LSB 1 Through Hole PDIP 28 9µs Parallel Bipolar, Unipolar External Dual
    RS Stock No. 162-4166
    Mfr. Part No.DAC121C085CIMM/NOPB
    £0.95
    Each (On a Reel of 1000)
    Units
    Resistor String 12 bit - -0.7%FSR ±8LSB 1 Surface Mount MSOP 8 8.5µs Serial (I2C) Unipolar External Single
    RS Stock No. 889-5503
    Mfr. Part No.MCP4822-E/MS
    BrandMicrochip
    £1.73
    Each (In a Tube of 100)
    Units
    Resistor String 12 bit - ±2%FSR ±12LSB 2 Surface Mount MSOP 8 4.5µs Serial (SPI/Microwire) Unipolar Internal Single
    RS Stock No. 660-5178
    Mfr. Part No.DAC7724UB
    £21.60
    Each
    Units
    R-2R, Resistor String 12 bit 100ksps ±2LSB ±1LSB 4 Surface Mount SOIC 28 10µs Parallel Bipolar, Unipolar External Dual, Single
    RS Stock No. 145-5742
    Mfr. Part No.DAC7724UB
    £19.525
    Each (In a Tube of 20)
    Units
    R-2R, Resistor String 12 bit 100ksps ±2LSB ±1LSB 4 Surface Mount SOIC 28 10µs Parallel Bipolar, Unipolar External Dual, Single
    RS Stock No. 461-6306
    Mfr. Part No.DAC8532IDGK
    £10.31
    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. 697-6940
    Mfr. Part No.AD5764RBSUZ
    £37.50
    Each
    Units
    R-2R, Resistor String 16 bit - ±0.02%FSR ±2LSB 4 Surface Mount TQFP 32 10µs Serial (SPI/QSPI/Microwire) Bipolar External, Internal Dual
    RS Stock No. 496-9925
    Mfr. Part No.AD9748ACPZ
    £6.40
    Each
    Units
    Segmented 8 bit 210Msps ±0.5%FSR ±0.25LSB 1 Surface Mount LFCSP 32 0.011µs Parallel Unipolar External, Internal Single
    RS Stock No. 517-123
    Mfr. Part No.DAC121C085CIMM/NOPB
    £1.95
    Each
    Units
    Resistor String 12 bit - -0.7%FSR ±8LSB 1 Surface Mount MSOP 8 8.5µs Serial (I2C) Unipolar External Single