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AD660 Datasheet(PDF) 1 Page - Analog Devices |
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AD660 Datasheet(HTML) 1 Page - Analog Devices |
1 / 12 page FUNCTIONAL BLOCK DIAGRAM 16-BIT LATCH 16-BIT DAC CONTROL LOGIC +10V REF 16-BIT LATCH 20 24 22 21 5 11 12 16 15 14 13 17 18 19 23 AD660 10k 10.05k 10k SIN/ DB0 DB7 S OUT SPAN/ BIP OFFSET V OUT AGND REF OUT REF IN LDAC SER DGND –V EE +V CC +V LL 1 2 3 4 LBE CS HBE CLR MSB/LSB/ DB1 UNI/BIP CLR/ REV. A 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 which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. a Monolithic 16-Bit Serial/Byte DACPORT AD660 FEATURES Complete 16-Bit D/A Function On-Chip Output Amplifier On-Chip Buried Zener Voltage Reference 1 LSB Integral Linearity 15-Bit Monotonic over Temperature Microprocessor Compatible Serial or Byte Input Double Buffered Latches Fast (40 ns) Write Pulse Asynchronous Clear (to 0 V) Function Serial Output Pin Facilitates Daisy Chaining Unipolar or Bipolar Output Low Glitch: 15 nV-s Low THD+N: 0.009% One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 617/329-4700 Fax: 617/326-8703 PRODUCT DESCRIPTION The AD660 DACPORT ® is a complete 16-bit monolithic D/A converter with an on-board voltage reference, double buffered latches and output amplifier. It is manufactured on Analog De- vices’ BiMOS II process. This process allows the fabrication of low power CMOS logic functions on the same chip as high pre- cision bipolar linear circuitry. The AD660’s architecture ensures 15-bit monotonicity over time and temperature. Integral and differential nonlinearity is maintained at ±0.003% max. The on-chip output amplifier pro- vides a voltage output settling time of 10 µs to within 1/2 LSB for a full-scale step. The AD660 has an extremely flexible digital interface. Data can be loaded into the AD660 in serial mode or as two 8-bit bytes. This is made possible by two digital input pins which have dual functions. The serial mode input format is pin selectable to be MSB or LSB first. The serial output pin allows the user to daisy chain several AD660s by shifting the data through the input latch into the next DAC thus minimizing the number of control lines required to SIN, CS and LDAC. The byte mode input for- mat is also flexible in that the high byte or low byte data can be loaded first. The double buffered latch structure eliminates data skew errors and provides for simultaneous updating of DACs in a multi-DAC system. The AD660 is available in five grades. AN and BN versions are specified from –40 °C to +85°C and are packaged in a 24-pin 300 mil plastic DIP. AR and BR versions are also specified from –40 °C to +85°C and are packaged in a 24-pin SOIC. The SQ version is packaged in a 24-pin 300 mil cerdip package and is also available compliant to MIL-STD-883. Refer to the AD660/ 883B data sheet for specifications and test conditions. DACPORT is a registered trademark of Analog Devices, Inc. PRODUCT HIGHLIGHTS 1. The AD660 is a complete 16-bit DAC, with a voltage refer- ence, double buffered latches and output amplifier on a sin- gle chip. 2. The internal buried Zener reference is laser trimmed to 10.000 volts with a ±0.1% maximum error and a tempera- ture drift performance of ±15 ppm/°C. The reference is available for external applications. 3. The output range of the AD660 is pin programmable and can be set to provide a unipolar output range of 0 V to +10 V or a bipolar output range of –10 V to +10 V. No external com- ponents are required. 4. The AD660 is both dc and ac specified. DC specifications include ±1 LSB INL and ±1 LSB DNL errors. AC specifi- cations include 0.009% THD+N and 83 dB SNR. 5. The double buffered latches on the AD660 eliminate data skew errors and allow simultaneous updating of DACs in multi-DAC applications. 6. The CLEAR function can asynchronously set the output to 0 V regardless of whether the DAC is in unipolar or bipolar mode. 7. The output amplifier settles within 10 µs to ±1/2 LSB for a full-scale step and within 2.5 µs for a 1 LSB step over tem- perature. The output glitch is typically 15 nV-s when a full- scale step is loaded. |
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