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. 522-9240
    Mfr. Part No.AD7542JNZ
    SGD61.52
    Each
    units
    R-2R, Resistor String 12 bit - ±4LSB ±1LSB 1 Through Hole PDIP 16 2µs Parallel - External Single
    RS Stock No. 669-6294
    Mfr. Part No.MCP4822-E/MS
    BrandMicrochip
    SGD4.52
    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. 669-6290
    Mfr. Part No.MCP4725A0T-E/CH
    BrandMicrochip
    SGD1.564
    Each (In a Pack of 5)
    units
    Resistor String 12 bit - ±2%FSR ±14.5LSB 1 Surface Mount SOT-23A 6 6µs Serial (I2C) Unipolar External Single
    RS Stock No. 165-2133
    Mfr. Part No.MCP4821-E/P
    BrandMicrochip
    SGD2.84
    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. 497-0149
    Mfr. Part No.AD1955ARSZ
    SGD22.36
    Each
    units
    Delta Sigma 24 bit 192ksps ±6%FSR - 2 Surface Mount SSOP 28 - Serial (SPI) Bipolar Internal Single
    RS Stock No. 823-7926
    Mfr. Part No.MCP4811-E/SN
    BrandMicrochip
    SGD2.44
    Each (In a Pack of 5)
    units
    Resistor String 10 bit - - 3.5LSB 1 Surface Mount SOIC 8 4.5µs Serial (SPI) Bipolar Internal Single
    RS Stock No. 887-7423
    Mfr. Part No.MCP4728-E/UN
    BrandMicrochip
    SGD2.32
    Each (In a Tube of 100)
    units
    Resistor String 12 bit - - ±13LSB - Surface Mount MSOP 10 - Serial (I2C) - - Single
    RS Stock No. 200-6640
    Mfr. Part No.TLC5628CN
    SGD12.76
    Each
    units
    Resistor String 8 bit 45ksps ±60mV ±1LSB 8 Through Hole PDIP 16 10µs Serial (SPI) Unipolar External Single
    RS Stock No. 889-5531
    Mfr. Part No.MCP4921-E/P
    BrandMicrochip
    SGD2.793
    Each (In a Tube of 60)
    units
    Resistor String 12 bit - 1%FSR ±12LSB 1 Through Hole PDIP 8 4.5µs Serial (SPI/Microwire) Unipolar External Single
    RS Stock No. 162-4365
    Mfr. Part No.TLC5628CN
    SGD9.762
    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. 160-7973
    Mfr. Part No.AD5641BKSZ-500RL7
    SGD5.093
    Each (On a Reel of 500)
    units
    Resistor String 14 bit - ±0.5mV ±4LSB 1 Surface Mount SC-70 6 10µs Serial (SPI/QSPI) Bipolar External Single
    RS Stock No. 687-8736
    Mfr. Part No.MCP4728-E/UN
    BrandMicrochip
    SGD3.05
    Each
    units
    Resistor String 12 bit - ±3%FSR ±13LSB 4 Surface Mount MSOP 10 6µs Serial (I2C) Unipolar Internal Single
    RS Stock No. 538-4139
    Mfr. Part No.AD7846JNZ
    SGD85.15
    Each
    units
    Resistor String 16 bit 143ksps ±16LSB ±16LSB 1 Through Hole PDIP 28 9µs Parallel Bipolar, Unipolar External Dual
    RS Stock No. 522-9896
    Mfr. Part No.AD7541AKNZ
    SGD39.69
    Each
    units
    R-2R, Resistor String 12 bit - ±5LSB ±0.5LSB 1 Through Hole PDIP 18 0.6µs Parallel - External Single
    RS Stock No. 697-7458
    Mfr. Part No.AD9767ASTZ
    SGD39.06
    Each
    units
    Segmented 14 bit 125Msps ±5%FSR ±4LSB 2 Surface Mount LQFP 48 0.035µs Parallel Unipolar External, Internal Single
    RS Stock No. 820-9334
    Mfr. Part No.AD5641BKSZ-500RL7
    SGD7.94
    Each (In a Pack of 2)
    units
    Resistor String 14 bit - ±0.5mV ±4LSB 1 Surface Mount SC-70 6 10µs Serial (SPI/QSPI) Bipolar External Single
    RS Stock No. 738-6027
    Mfr. Part No.MCP4921-E/P
    BrandMicrochip
    SGD3.37
    Each (In a Pack of 2)
    units
    Resistor String 12 bit - 1%FSR ±12LSB 1 Through Hole PDIP 8 4.5µs Serial (SPI/Microwire) Unipolar External Single
    RS Stock No. 356-7045
    Mfr. Part No.TLC5620CD
    SGD10.54
    Each
    units
    Resistor String 8 bit 48ksps ±60mV ±1LSB 4 Surface Mount SOIC 14 10µs Serial (SPI) Unipolar External Single
    RS Stock No. 146-0259
    Mfr. Part No.MCP4728A1-E/UN
    BrandMicrochip
    SGD2.15
    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. 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