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 F_S = 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, V_L, can be separated from the analog supply, V_S, for reduced digital feedthrough. Separate analog and digital ground pins are also provided. In systems employing a single +5 volt power supply, V_L and V_S 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.

Part#	DAC DNR (dB)	SNR (dB)	DAC THD+N @ 1 kHz (-3dB)	Product Description	Price* (1000-4999)	Function
AD1933	110	110	96	192 kHz, 24-Bit CODEC w/ PLL	$3.62	DAC
AD1934	108	108	96	192 kHz, 24-Bit CODEC w/ PLL, I2C and SPI.	$3.11	DAC
AD1955	120	120	110	Multibit Sigma-Delta D/A w/ SACD Playback	$6.78	DAC
AD1853	116	117	104	24-bit 192 kHz Multibit Sigma-Delta DAC (Current Output)	$7.50	DAC
AD1852	114	114	104	Stereo, 24-bit 192 kHz Multibit Sigma-Delta D/A (Voltage Output)	$5.50	DAC
AD1854	113	112	97	Complete Single Chip Stereo Audio D/A	$4.00	DAC
AD1953	112	112	100	SigmaDSP 3 Ch, 26-/48-Bit Processing D/A	$7.06	DAC, Signal Processor
AD1954	112	112	100	SigmaDSP 3 Ch, 26-/48-Bit Processing D/A	$7.06	DAC, Signal Processor
AD1833A	110	110	95	Multi-Ch, 24-bit 192 kHz, Sigma-Delta D/A	$3.93	DAC
AD1958	109	108	96	Stereo, 24-bit 192 kHz Multibit Sigma-Delta D/A w/ PLL	-	DAC
AD1959	108	108	94	Stereo, 24-bit 192 kHz Multibit Sigma-Delta D/A, w/ PLL	-	DAC
AD1851	96	110	90	16-Bit, 16 3 FS PCM Audio DACs Dual 5V Supplies	$4.65	DAC
AD1857	94	-	90	Stereo, Single Supply 16/18/20-bit Sigma-Delta D/A	-	DAC
AD1859	94	-	88	Stereo, Single Supply 18-bit Integrated Sigma-Delta D/A	$4.40	DAC
AD1858	94	-	90	Stereo, Single Supply 16-bit Sigma-Delta D/A	-	DAC
AD1868	92	98	88	Single Supply Dual 18-Bit Audio DAC	$11.64	DAC
AD1866	90	95	86	Single Supply Dual 16-Bit Audio DAC	$10.44	DAC

* 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.

The model number is a specific version of a generic that can be purchased or sampled.

Status indicates the current lifecycle of the product. This can be one of 4 stages:

• Pre-Release: The model has not been released to general production, but samples may be available.
• Production: The model is currently being produced, and generally available for purchase and sampling.
• Last Time Buy: The model has been scheduled for obsolescence, but may still be purchased for a limited time.
• Obsolete: The specific part is obsolete and no longer available. Other models listed in the table may still be available (if they have a status that is not obsolete).

The package for this IC (i.e. DIP, SOIC, BGA). An Evaluation Board is a board engineered to show the performance of the model, the part is included on the board.

For detailed drawings and chemical composition please consult our  Package Site

Pin Count is the number of pins, balls, or pads on the device. Pin-out diagrams & pin function descriptions may be found in the datasheet.

This is the acceptable operating range of the device. The various ranges specified are as follows:

• Commercial: 0 to +70 degrees Celsius
• Military : -55 to +125 degrees Celsius
• Industrial: Temperature ranges may vary by model. Please consult the datasheet for more information.
• Automotive: -40 to +125 degrees Celsius

The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.

This is the date Analog Devices, Inc. anticipates that the product will ship from the warehouse. Most orders ship within 48 hours of this date.Once an order has been placed, Analog Devices, Inc. will send an Order Acknowledgement email to confirm your delivery date. It is important to note the scheduled dock date on the order entry screen. We do take orders for items that are not in stock, so delivery may be scheduled at a future date. Also, please note the warehouse location for the product ordered. We have warehouses in the United States, Europe and Southeast Asia. Transit times from these sites may vary.

Due to environmental concerns, ADI offers many of our products in lead-free versions. For more information about lead-free parts, please consult our Pb (Lead) free information page.