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. 662-1509
    Mfr. Part No.PCM4104PFBT
    MYR39.89
    Each
    units
    Delta Sigma 24 bit 216ksps 0.5%FSR - 4 Surface Mount TQFP 48 - Serial (SPI) Bipolar External Single
    RS Stock No. 645-3696
    Mfr. Part No.DAC0800LCM/NOPB
    MYR9.682
    Each (In a Pack of 5)
    units
    Current Steering 8 bit - ±1LSB ±0.19%FSR 1 Surface Mount SOIC 16 0.15µs Parallel Unipolar External Dual
    RS Stock No. 162-4365
    Mfr. Part No.TLC5628CN
    MYR29.335
    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. 820-9205
    Mfr. Part No.AD5689RBRUZ
    MYR44.50
    Each
    units
    Resistor String 16 bit - ±0.1%FSR ±2LSB 2 Surface Mount TSSOP 16 8µs Serial (SPI/QSPI) - External Single
    RS Stock No. 412-494
    Mfr. Part No.AD421BRZ
    MYR72.80
    Each
    units
    Delta Sigma 16 bit 125sps ±0.2%FSR ±0.01%FSR 1 Surface Mount SOIC W 16 8000µs Serial (SPI) - External, Internal Single
    RS Stock No. 522-8821
    Mfr. Part No.AD1866RZ
    MYR107.18
    Each
    units
    R-2R, Resistor String 16 bit - ±3%FSR ±3dB 2 Surface Mount SOIC W 16 - Serial Bipolar Internal Single
    RS Stock No. 697-7896
    Mfr. Part No.ADV7123KSTZ50
    MYR44.50
    Each
    units
    Segmented 10 bit 50Msps ±5%FSR ±1LSB 3 Surface Mount LQFP 48 - Parallel Unipolar External, Internal Single
    RS Stock No. 162-4996
    Mfr. Part No.DAC084S085CIMM/NOPB
    MYR6.34
    Each (On a Reel of 1000)
    units
    Resistor String 8 bit - -0.75%FSR ±0.5LSB 4 Surface Mount MSOP 10 4.5µs Serial (SPI/QSPI/Microwire) Unipolar External Single
    RS Stock No. 179-1778
    Mfr. Part No.TLV5624CD
    MYR26.692
    Each (In a Tube of 75)
    units
    Resistor String 8 bit 233ksps ±0.6%FSR ±0.5LSB 1 Surface Mount SOIC 8 7µs Serial (SPI/QSPI/Microwire) Unipolar External, Internal Single
    RS Stock No. 662-1931
    Mfr. Part No.TLV5624CD
    MYR17.63
    Each
    units
    Resistor String 8 bit 233ksps ±0.6%FSR ±0.5LSB 1 Surface Mount SOIC 8 7µs Serial (SPI/QSPI/Microwire) Unipolar External, Internal Single
    RS Stock No. 460-613
    Mfr. Part No.DAC0808LCN/NOPB
    MYR10.732
    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. 200-6640
    Mfr. Part No.TLC5628CN
    MYR31.67
    Each
    units
    Resistor String 8 bit 45ksps ±60mV ±1LSB 8 Through Hole PDIP 16 10µs Serial (SPI) Unipolar External Single
    RS Stock No. 709-5973
    Mfr. Part No.AD5724AREZ
    MYR51.44
    Each
    units
    Resistor String 12 bit 100ksps 0.08%FSR ±1LSB 4 Surface Mount TSSOP 24 12µs Serial (SPI/QSPI/Microwire) Bipolar, Unipolar External Dual, Single
    RS Stock No. 506-1735
    Mfr. Part No.LTC2620CGN#PBF
    MYR72.67
    Each
    units
    - 12 bit - ±0.7%FSR ±4LSB 8 Surface Mount SSOP 16 7µs Serial (SPI/Microwire) Unipolar External Single
    RS Stock No. 346-7030
    Mfr. Part No.TLC7226CN
    MYR28.33
    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. 497-0149
    Mfr. Part No.AD1955ARSZ
    MYR60.70
    Each
    units
    Delta Sigma 24 bit 192ksps ±6%FSR - 2 Surface Mount SSOP 28 - Serial (SPI) Bipolar Internal Single
    RS Stock No. 651-2105
    Mfr. Part No.DAC084S085CIMM/NOPB
    MYR13.618
    Each (In a Pack of 5)
    units
    Resistor String 8 bit - -0.75%FSR ±0.5LSB 4 Surface Mount MSOP 10 4.5µs Serial (SPI/QSPI/Microwire) Unipolar External Single
    RS Stock No. 121-8521
    Mfr. Part No.TLC7226CN
    MYR22.42
    Each (In a Tube of 20)
    units
    - - - - - - - - - - - - - -
    RS Stock No. 922-2697
    Mfr. Part No.TLV5618ACD
    MYR46.638
    Each (In a Tube of 75)
    units
    Resistor String 12 bit - ±0.6%FSR ±4LSB 2 Surface Mount SOIC 8 10µs Serial (SPI/QSPI/Microwire) Unipolar External Single
    RS Stock No. 102-5618
    Mfr. Part No.DAC0800LCM/NOPB
    MYR7.992
    Each (In a Tube of 48)
    units
    Current Steering 8 bit - ±1LSB ±0.19%FSR 1 Surface Mount SOIC 16 0.15µs Parallel Unipolar External Dual