16/18-Bit Self-Calibrating a Serial/Byte DACPORT AD760 FUNCTIONAL BLOCK DIAGRAM FEATURES 0.2 LSB (0.00031%) Typ Peak DNL and INL MSB/ 18/16 0.5 LSB (0.00076%) Typ Unipolar Offset, Bipolar Zero S LSB SERIAL IN OR OR OR 17-Bit Monotonicity Guaranteed CS DB0 DB1 DB2 DB7 18-Bit Resolution (in Serial Mode) 12 16 14 13 7 UNI/ Complete 16/18-Bit D/A Function BIP CLR AD760 17 16/18-BIT On-Chip Output Amplifier OR LBE 15 S OUT INPUT REGISTER 18 HBE On-Chip Buried Zener Voltage Reference 10k 19 SER SPAN/ 24 Microprocessor Compatible 16/18-BIT DAC LATCH BIP 20 CLR OFF Serial or Byte Input 10k 21 LDAC Double Buffered Latches 25 REF IN MAIN DAC Asynchronous Clear Function 23 V 9.95k OUT Serial Output Pin Facilitates Daisy Chaining 27 MUX OUT RAM Pin Strappable Unipolar or Bipolar Output 28 MUX IN Low THD+N: 0.005% +10V 26 REF OUT CALIBRATION DAC REF 22 MUX Output Control on Power-Up and Supply Glitches AGND CALIBRATION SEQUENCER PRODUCT DESCRIPTION The AD760 is a complete 16/18-bit self-calibrating monolithic 1 2 3 4 5 6 DAC (DACPORT) with onboard voltage reference, double CALOK CAL V +V +V DGND EE CC LL buffered latches and output amplifier. It is manufactured on Analog Devices BiMOS II process. This process allows the fab- rication of low power CMOS logic functions on the same chip MUX output in a predetermined state by means of a digital and as high precision bipolar linear circuitry. analog power supply detection circuit. This is particularly use- Self-calibration is initiated by simply pulsing the CAL pin low. ful for robotic and industrial control applications. The CALOK pin indicates when calibration has been success- The AD760 is available in a 28-pin, 600 mil cerdip package. fully completed. The output multiplexer (MUX ) can be used OUT The AQ version is specified from 40C to +85C. to send the output to the bottom of the output range during calibration. Data can be loaded into the AD760 as straight binary, serial data or as two 8-bit bytes. In serial mode, 16-bit or 18-bit data V = 10V TO +10V OUT 0.75 can be used and the serial mode input format is pin selectable, R = 2k L C = 1000pF L to be MSB or LSB first. This is made possible by three digital input pins which have dual functions (Pins 12, 13, and 14). In 0.25 byte mode the user can similarly define whether the high byte or 0 low byte is loaded first. The serial output (S ) pin allows the OUT 0.25 user to daisy chain several AD760s by shifting the data through the input latch into the next DAC thus minimizing the number of control lines required in a multiple DAC application. The 0.75 double buffered latch structure eliminates data skew errors and provides for simultaneous updating of DACs in a multi-DAC 0 16384 32768 49152 65535 system. INPUT CODE Decimal The asynchronous CLR function can be configured to clear the output to minus full-scale or midscale depending on the state of Typical Integral Nonlinearity Pin 17 when CLR is strobed. The AD760 also powers up with the DACPORT is a registered trademark of Analog Devices, Inc. Rev. B Document Feedback 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 One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. rights of third parties that may result from its use. Specifications subject to change without notice. No Tel: 781.329.4700 2018 Analog Devices, Inc. All rights reserved. license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarks and registered trademarks are the property of their respective owners. Technical Support www.analog.com RELATIVE ACCURACY LSB CONTROL LOGIC( T = +25C, V = +15 V, V = 15 V, V = + 5 V, unless otherwise noted) AD760SPECIFICATIONS A CC EE LL AD760AQ Model Min Typ Max Units 1 RESOLUTION 16/18 Bits 2 TRANSFER FUNCTION CHARACTERISTICS 3 With Calibration T 40C T +85C CAL CAL Integral Nonlinearity 0.2 0.75 16-Bit LSB Differential Nonlinearity 0.2 0.5 16-Bit LSB Monotonicity 17 18 Bits Unipolar Offset 0.5 1 16-Bit LSB Bipolar Zero Error 0.5 1 16-Bit LSB Without Calibration Integral Nonlinearity 2 16-Bit LSB T to T 4 16-Bit LSB MIN MAX Integral Nonlinearity Drift 0.015 16-Bit LSB/C Differential Nonlinearity 2 16-Bit LSB T to T 4 16-Bit LSB MIN MAX Differential Nonlinearity Drift 0.015 16-Bit LSB/C Monotonicity Over Temperature 14 Bits Unipolar Offset 2.5 mV Unipolar Offset Drift (T to T ) 3 ppm/C MIN MAX Bipolar Zero Error 10 mV Bipolar Zero Error Drift (T to T ) 5 ppm/C MIN MAX 4, 5 Gain Error 0.125 % of FSR 5 Gain Drift (T to T ) 25 ppm/C MIN MAX 6 DAC Gain Error 0.08 % of FSR 6 DAC Gain Drift (T to T ) 10 ppm/C MIN MAX INPUT RESISTANCE REFIN 7 10 13 k SPAN/BIP OFF 7 10 13 k REFERENCE OUTPUT Voltage 9.99 10.00 10.01 V Drift 25 ppm/C 7 External Current 24 mA Capacitive Load 1000 pF Short Circuit Current 25 mA Long-Term Stability 50 ppm/1000 Hrs 2 OUTPUT CHARACTERISTICS Output Voltage Range Unipolar Configuration 0 +10 V Bipolar Configuration 10 +10 V Output Current 5 mA Capacitive Load 1000 pF Short Circuit Current 25 mA MUX Resistance 0.9 7 k OUT DIGITAL INPUTS (T to T ) MIN MAX V (Logic 1) 2.0 V V IH LL V (Logic 0) 0 0.8 V IL I (V = V ) 10 A IH IH LL I (V = 0 V) 10 A IL IL DIGITAL OUTPUT (T to T ) MIN MAX V (I = 0.6 mA) 2.4 V OH OH V (I = 1.6 mA) 0.4 V OL OL POWER SUPPLIES Voltage 8 V +14.25 +15.75 V CC 8 V 15.75 14.25 V EE V +4.75 +5.25 V LL Current (No Load) I +18 +21 mA CC I 21 18 mA EE I LL V , V = 5.0 V, 0 V 2 3 mA IH IL V , V = 2.4 V, 0.4 V 3 7.5 mA IH IL Power Supply Sensitivity with V = 10 V 1 ppm/% OUT Power Dissipation (Static, No Load) 600 725 mW TEMPERATURE RANGE Specified Performance (A) 40 +85 C 2 REV. B