Single Supply a Dual 16-Bit Audio DAC AD1866 FUNCTIONAL BLOCK DIAGRAM FEATURES Dual Serial Input, Voltage Output DACs Single +5 Volt Supply AD1866 16-BIT 0.005% THD+N DAC V 1 16 V L B L Low Power 50 mW 115 dB Channel Separation V LL 2 16-BIT 15 S Operates at 83 Oversampling SERIAL REGISTER V L 16-Pin Plastic DIP or SOIC Package DL 14 3 O CLK V APPLICATIONS NRL 4 13 REF Multimedia Workstations AGND DR 5 16-BIT 12 PC Audio Add-In Boards SERIAL Portable CD and DAT Players REGISTER V LR 6 11 NRR REF Automotive CD and DAT Players DGND 10 Noise Cancellation 7 V R O 16-BIT DAC V R V 8 B 9 S PRODUCT DESCRIPTION The AD1866 is a complete dual 16-bit DAC offering excellent The AD1866 operates on +5 V power supplies. The digital performance while requiring a single +5 V power supply. It is supply, V , can be separated from the analog supply, V , for re- L S fabricated on Analog Devices ABCMOS wafer fabrication duced digital feedthrough. Separate analog and digital ground process. The monolithic chip includes CMOS logic elements, pins are also provided. In systems employing a single +5 volt bipolar and MOS linear elements and laser trimmed, thin- power supply, V and V should be connected together. In bat- L S film resistor elements. Careful design and layout techniques tery operated systems, operation will continue even with re- have resulted in low distortion, low noise, high channel separa- duced supply voltage. Typically, the AD1866 dissipates 50 mW. tion and low power dissipation. The AD1866 is packaged in either a 16-pin plastic DIP or a The DACs on the AD1866 chip employ a partially segmented 16-pin plastic SOIC package. Operation is guaranteed over the architecture. The first three MSBs of each DAC are segmented temperature range of 35C to +85C and over the voltage into 7 elements. The 13 LSBs are produced using standard supply range of 4.75 V to 5.25 V. R-2R techniques. The segments and R-2R resistors are laser trimmed to provide extremely low total harmonic distortion. PRODUCT HIGHLIGHTS The AD1866 requires no deglitcher or trimming circuitry. 1. Single supply operation +5 V. Each DAC is equipped with a high performance output ampli- 2. 50 mW power dissipation. fier. These amplifiers achieve fast settling and high slew rate, 3. THD+N is 0.005% (typical). producing 1 V signals at load currents up to 1 mA. The buff- 4. Signal-to-Noise Ratio is 95 dB (typical). ered output signal range is 1.5 V to 3.5 V. The 2.5 V reference voltages eliminate the need for false ground networks. 5. 115 dB channel separation (typical). A versatile digital interface allows the AD1866 to be directly 6. Compatible with all digital filter chips. connected to all digital filter chips. Fast CMOS logic elements 7. 16-pin DIP and 16-pin SOIC packages. allow for an input clock rate of up to 16 MHz. This allows for 8. No deglitcher required. operation at 2, 4, 8, or 16 the sampling frequency (where F = 44.1 kHz) for each channel. The digital input pins of the S 9. No external adjustments required. AD1866 are TTL and +5 V CMOS compatible. REV. 0 Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Tel: 617/329-4700 Fax: 617/326-8703AD1866SPECIFICATIONS (T = +258C and +5 V supplies unless otherwise noted) A Min Typ Max Unit RESOLUTION 16 Bits DIGITAL INPUTS V 2.4 V IH V 0.8 V IL I , V = V 1.0 A IH IH L I , V = DGND 10.0 A IL IL Maximum Clock Input Frequency 13.5 MHz ACCURACY Gain Error 3 % of FSR Gain Matching 3 % of FSR Midscale Error 30 mV Midscale Error Matching 10 mV Gain Linearity Error 3dB DRIFT (0C to +70C) Gain Drift 100 ppm/C Midscale Drift 130 V/C TOTAL HARMONIC DISTORTION + NOISE 0 dB, 990.5 Hz AD1866N 0.005 0.01 % AD1866R 0.005 0.01 % 20 dB, 990.5 Hz AD1866N 0.02 % AD1866R 0.02 % 60 dB, 990.5 Hz AD1866N 2.0 % AD1866R 2.0 % CHANNEL SEPARATION (1 kHz, 0 dB) 108 115 dB SIGNAL-TO-NOISE RATIO (With A-Weight Filter) 95 dB D-RANGE (With A-Weight Filter) 90 dB OUTPUT Voltage Output Pins (V , V ) OL OR Output Range (3%) 1V Output Impedance 0.1 Load Current 1mA Bias Voltage Pins (V , V ) BL BR Output Range +2.5 V Output Impedance 350 POWER SUPPLY Specification, V and V 4.75 5 5.25 V L S Operation, V and V 3.5 5.25 V L S +I, V and V = 5 V 10 14 mA L S POWER DISSIPATION 50 70 mW TEMPERATURE RANGE Operation 35 85 C Storage 60 100 C Specifications subject to change without notice. Specifications in boldface are tested on all production units at final electrical 2 REV. 0