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. 162-4365
    Mfr. Part No.TLC5628CN
    £5.088
    Each (In a Tube of 25)
    Units
    Resistor String 8 bit 45ksps ±60mV ±1LSB 8 Through Hole PDIP 16 10µs Serial (SPI) Unipolar External Single
    RS Stock No. 538-8298
    Mfr. Part No.AD5342BRUZ
    £10.16
    Each
    Units
    Resistor String 12 bit 125ksps ±1%FSR ±16LSB 2 Surface Mount TSSOP 28 10µs Parallel Unipolar External Single
    RS Stock No. 522-8607
    Mfr. Part No.AD7528KNZ
    £13.30
    Each
    Units
    R-2R, Resistor String 8 bit 5.6Msps ±4LSB ±0.5LSB 2 Through Hole PDIP 20 0.4µs Parallel - External Single
    RS Stock No. 889-5847
    Mfr. Part No.MCP4726A0T-E/CH
    BrandMicrochip
    £0.556
    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. 806-5519
    Mfr. Part No.AD5791ARUZ
    £51.49
    Each
    Units
    R-2R, Resistor String 20 bit - ±21LSB ±4LSB 1 Surface Mount TSSOP 20 1µs Serial (SPI) Bipolar External, Internal Dual
    RS Stock No. 522-9004
    Mfr. Part No.DAC08CPZ
    £3.13
    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. 738-7121
    Mfr. Part No.MCP4726A0T-E/CH
    BrandMicrochip
    £0.768
    Each (In a Pack of 5)
    Units
    Resistor String 12 bit - 82LSB 14.5LSB 1 Surface Mount SOT-23 6 6µs Serial (I2C) Unipolar External Single
    RS Stock No. 522-9212
    Mfr. Part No.AD7533JNZ
    £9.97
    Each
    Units
    R-2R, Resistor String 10 bit 1.7Msps ±1%FSR ±0.2%FSR 1 Through Hole PDIP 16 0.8µs Parallel - External Single
    RS Stock No. 820-9747
    Mfr. Part No.AD5421CREZ
    £11.87
    Each
    Units
    Current Steering 16 bit - ±0.126%FSR ±1LSB 1 Surface Mount TSSOP 28 50µs Serial (SPI) - External, Internal Single
    RS Stock No. 716-5832
    Mfr. Part No.CS4385-CQZ
    £5.52
    Each
    Units
    Delta Sigma 24 bit 216ksps - - 8 Surface Mount LQFP 48 - Serial Bipolar Internal Single
    RS Stock No. 412-400
    Mfr. Part No.ADV7125KSTZ50
    £6.93
    Each
    Units
    Segmented 8 bit 50Msps ±5%FSR ±1LSB 3 Surface Mount LQFP 48 - Parallel Unipolar External, Internal Single
    RS Stock No. 662-5501
    Mfr. Part No.PCM2706PJT
    £7.83
    Each
    Units
    Delta Sigma 16 bit 48ksps ±8%FSR - 2 Surface Mount TQFP 32 - Serial Bipolar - Single
    RS Stock No. 709-5456
    Mfr. Part No.AD7245AANZ
    £14.75
    Each
    Units
    R-2R, Resistor String 12 bit 143ksps ±0.2%FSR ±1LSB 1 Through Hole PDIP 24 7µs Parallel Bipolar, Unipolar Internal Dual, Single
    RS Stock No. 522-8843
    Mfr. Part No.AD558JNZ
    £18.11
    Each
    Units
    R-2R, Resistor String 8 bit - ±2.5LSB ±0.5LSB 1 Through Hole PDIP 16 3µs Parallel Unipolar Internal Single
    RS Stock No. 823-1110
    Mfr. Part No.MCP4728A0-E/UN
    BrandMicrochip
    £1.528
    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. 169-8390
    Mfr. Part No.CS4385-CQZ
    £3.58
    Each (In a Tray of 250)
    Units
    Delta Sigma 24 bit 216ksps - - 8 Surface Mount LQFP 48 - Serial Bipolar Internal Single
    RS Stock No. 165-1973
    Mfr. Part No.MCP4728A0-E/UN
    BrandMicrochip
    £1.11
    Each (In a Tube of 100)
    Units
    Resistor String 12 bit - - ±13LSB 4 Surface Mount MSOP 10 6µs Serial (I2C) Unipolar External, Internal Single
    RS Stock No. 162-7021
    Mfr. Part No.PCM2706PJT
    £4.995
    Each (On a Reel of 250)
    Units
    Delta Sigma 16 bit 48ksps ±8%FSR - 2 Surface Mount TQFP 32 - Serial Bipolar - Single
    RS Stock No. 165-2133
    Mfr. Part No.MCP4821-E/P
    BrandMicrochip
    £1.47
    Each (In a Tube of 60)
    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