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. 823-0767
    Mfr. Part No.MCP4725A1T-E/CH
    BrandMicrochip
    £0.769
    Each (In a Pack of 10)
    Units
    Resistor String 12 bit - - ±14.5LSB 1 Surface Mount SOT-23 6 6µs Serial (I2C) Bipolar External Single
    RS Stock No. 831-9103
    Mfr. Part No.AD5693RARMZ
    £5.18
    Each
    Units
    Resistor String 16 bit - ±0.075%FSR ±8LSB 1 Surface Mount MSOP 10 7µs Serial (I2C) - External Single
    RS Stock No. 412-961
    Mfr. Part No.AD5321BRMZ
    £6.63
    Each
    Units
    Resistor String 12 bit 125ksps ±1.25%FSR ±16LSB 1 Surface Mount MSOP 8 10µs Serial (I2C) Unipolar External Single
    RS Stock No. 758-9626
    Mfr. Part No.AD5422AREZ
    £9.99
    Each
    Units
    R-2R, Resistor String 16 bit 40ksps +0.007%FSR +0.008%FSR - Surface Mount TSSOP 24 25µs Serial (SPI) Bipolar, Unipolar External Dual, Single
    RS Stock No. 813-6438
    Mfr. Part No.DAC8564IAPW
    £10.98
    Each
    Units
    Resistor String 16 bit - ±0.5%FSR 4LSB 4 Surface Mount TSSOP 16 12µs Serial (SPI) Bipolar External, Internal Single
    RS Stock No. 912-3023
    Mfr. Part No.MCP4802-E/P
    BrandMicrochip
    £0.936
    Each (In a Tube of 60)
    Units
    Resistor String 8 bit - ±2%FSR 1LSB 2 Through Hole PDIP 8 4.5µs Serial (SPI) Bipolar Internal Single
    RS Stock No. 460-613
    Mfr. Part No.DAC0808LCN/NOPB
    £1.76
    Each (In a Pack of 5)
    Units
    R-2R, Resistor String 8 bit - - ±0.19%FSR 1 Through Hole MDIP 16 0.15µs Parallel Unipolar External Dual
    RS Stock No. 523-6692
    Mfr. Part No.AD7248JNZ
    £25.03
    Each
    Units
    R-2R, Resistor String 12 bit - ±0.2%FSR ±1LSB 1 Through Hole PDIP 20 10µs Parallel Bipolar, Unipolar Internal Dual, Single
    RS Stock No. 346-7030
    Mfr. Part No.TLC7226CN
    £4.75
    Each
    Units
    R-2R, Resistor String 8 bit 143ksps ±2LSB ±1LSB 4 Through Hole PDIP 20 20µs Parallel Bipolar, Unipolar External Dual, Single
    RS Stock No. 496-7660
    Mfr. Part No.AD5443YRMZ
    £4.86
    Each
    Units
    R-2R, Resistor String 12 bit 2.5Msps ±10mV ±1LSB 1 Surface Mount MSOP 10 0.16µs Serial (SPI/QSPI/Microwire) - External Single
    RS Stock No. 165-2207
    Mfr. Part No.MCP4725A1T-E/CH
    BrandMicrochip
    £0.556
    Each (On a Reel of 3000)
    Units
    Resistor String 12 bit - - ±14.5LSB 1 Surface Mount SOT-23 6 6µs Serial (I2C) Bipolar External Single
    RS Stock No. 709-5998
    Mfr. Part No.AD5754AREZ
    £16.48
    Each
    Units
    Resistor String 16 bit 100ksps 0.08%FSR ±16LSB 4 Surface Mount TSSOP 24 12µs Serial (SPI/QSPI/Microwire) Bipolar, Unipolar External Dual, Single
    RS Stock No. 121-8521
    Mfr. Part No.TLC7226CN
    £4.258
    Each (In a Tube of 20)
    Units
    - - - - - - - - - - - - - -
    RS Stock No. 497-2858
    Mfr. Part No.AD5326BRUZ
    £13.09
    Each
    Units
    Resistor String 12 bit 125ksps ±1.25%FSR ±10LSB 4 Surface Mount TSSOP 16 10µs Serial (I2C) Unipolar External Single
    RS Stock No. 162-8162
    Mfr. Part No.DSD1794ADB
    £13.561
    Each (In a Tube of 47)
    Units
    Delta Sigma 24 bit 192ksps ±6%FSR - 2 Surface Mount SOIC 28 - Serial (SPI) Bipolar Internal Single
    RS Stock No. 894-9001
    Mfr. Part No.AD5672RBRUZ
    £9.64
    Each
    Units
    - 12 bit - ±0.14%FSR ±1LSB 8 Surface Mount TSSOP 20 8µs Serial - Internal Single
    RS Stock No. 726-3873
    Mfr. Part No.MCP4802-E/P
    BrandMicrochip
    £1.244
    Each (In a Pack of 5)
    Units
    Resistor String 8 bit - ±2%FSR 1LSB 2 Through Hole PDIP 8 4.5µs Serial (SPI) Bipolar Internal Single
    RS Stock No. 162-7663
    Mfr. Part No.DAC8564IAPW
    £9.469
    Each (In a Tube of 90)
    Units
    Resistor String 16 bit - ±0.5%FSR 4LSB 4 Surface Mount TSSOP 16 12µs Serial (SPI) Bipolar External, Internal Single
    RS Stock No. 545-7164
    Mfr. Part No.LTC1446CS8#PBF
    £9.62
    Each
    Units
    R-2R 12 bit - - 5LSB 2 Surface Mount SOIC 8 14µs Serial (SPI) Unipolar Internal Single
    RS Stock No. 806-5415
    Mfr. Part No.AD5667RBRMZ-1
    £8.59
    Each
    Units
    Resistor String 16 bit - ±1LSB ±1LSB 2 Surface Mount MSOP 10 7µs Serial (I2C) Bipolar Internal Single