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AD1866:  Single Supply Dual 16-Bit Audio DAC

The AD1866 is a complete dual 16-bit DAC offering excellent performance while requiring a single +5 V power supply. It is fabricated on Analog Devices' ABCMOS wafer fabrication process. The monolithic chip includes CMOS logic elements, bipolar and MOS linear elements and laser trimmed, thinfilm resistor elements. Careful design and layout techniques have resulted in low distortion, low noise, ...More

AD1866:  Single Supply Dual 16-Bit Audio DAC

Product Description

The AD1866 is a complete dual 16-bit DAC offering excellent performance while requiring a single +5 V power supply. It is fabricated on Analog Devices' ABCMOS wafer fabrication process. The monolithic chip includes CMOS logic elements, bipolar and MOS linear elements and laser trimmed, thinfilm resistor elements. Careful design and layout techniques have resulted in low distortion, low noise, high channel separa tion and low power dissipation.

The DACs on the AD1866 chip employ a partially segmented architecture. The first three MSBs of each DAC are segmented into 7 elements. The 13 LSBs are produced using standard R-2R techniques. The segments and R-2R resistors are laser trimmed to provide extremely low total harmonic distortion. The AD1866 requires no deglitcher or trimming circuitry.

Each DAC is equipped with a high performance output amplifier. These amplifiers achieve fast settling and high slew rate, producing ±1 V signals at load currents up to ±1 mA. The buffered output signal range is 1.5 V to 3.5 V. The 2.5 V reference voltages eliminate the need for "false ground" networks.

A versatile digital interface allows the AD1866 to be directly connected to all digital filter chips. Fast CMOS logic elements allow for an input clock rate of up to 16 MHz. This allows for operation at 2x, 4x, 8x, or 16x the sampling frequency (where FS = 44.1 kHz) for each channel. The digital input pins of the AD1866 are TTL and +5 V CMOS compatible.

The AD1866 operates on +5 V power supplies. The digital supply, VL, can be separated from the analog supply, VS, for reduced digital feedthrough. Separate analog and digital ground pins are also provided. In systems employing a single +5 volt power supply, VL and VS should be connected together. In battery operated systems, operation will continue even with reduced supply voltage. Typically, the AD1866 dissipates 50 mW.

The AD1866 is packaged in either a 16-pin plastic DIP or a 16-pin plastic SOIC package. Operation is guaranteed over the temperature range of -35°C to +85°C and over the voltage supply range of 4.75 V to 5.25 V.

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TECHNICAL DOCUMENTATION

  • Dual Serial Input, Voltage Output DACs
  • Single +5 Volt Supply
  • 0.005% THD+N
  • Low Power - 50 mW
  • 115 dB Channel Separation
  • Operation a 8x Oversampling
  • 16-Pin Plastic DIP or SOIC Package
  • DAC DNR (dB): 90dB
  • SNR (dB): 95dB
  • DAC THD+N @ 1 kHz (-3dB): 86dB
  • Product Description: Single Supply Dual 16-Bit Audio DAC

Functional Block Diagram for AD1866

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Part# DAC DNR (dB) SNR (dB) DAC THD+N @ 1 kHz (-3dB) Product Description Price* (1000-4999)
AD1933 110 110 96 192 kHz, 24-Bit CODEC w/ PLL $3.66
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AD1955 120 120 110 Multibit Sigma-Delta D/A w/ SACD Playback $6.86
AD1853 116 117 104 24-bit 192 kHz Multibit Sigma-Delta DAC (Current Output) $7.59
AD1852 114 114 104 Stereo, 24-bit 192 kHz Multibit Sigma-Delta D/A (Voltage Output) $5.57
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AD1953 112 112 100 SigmaDSP 3 Ch, 26-/48-Bit Processing D/A $7.14
AD1954 112 112 100 SigmaDSP 3 Ch, 26-/48-Bit Processing D/A $7.14
AD1833A 110 110 95 Multi-Ch, 24-bit 192 kHz, Sigma-Delta D/A $3.98
AD1958 109 108 96 Stereo, 24-bit 192 kHz Multibit Sigma-Delta D/A w/ PLL -
AD1851 96 110 90 16-Bit, 16 3 FS PCM Audio DACs Dual 5V Supplies $4.71
AD1857 94 - 90 Stereo, Single Supply 16/18/20-bit Sigma-Delta D/A -
AD1859 94 - 88 Stereo, Single Supply 18-bit Integrated Sigma-Delta D/A $4.45
AD1858 94 - 90 Stereo, Single Supply 16-bit Sigma-Delta D/A -
AD1868 92 98 88 Single Supply Dual 18-Bit Audio DAC -
AD1866 90 95 86 Single Supply Dual 16-Bit Audio DAC $10.57
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* The pricing listed here is provided only for budgetary purposes as recommended list price in U.S. Dollars in the United States ex factor per unit for the stated volume. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.
** Pricing is currently unavailable. Click on the product number to see the Product Page for additional information.

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