Complete Low Cost a 12-Bit D/A Converters ADDAC80/ADDAC85/ADDAC87 FEATURES FUNCTIONAL BLOCK DIAGRAM Single Chip Construction On-Board Output Amplifier (MSB) BIT 1 1 24 V OUT Low Power Dissipation: 300 mW REF REF BIT 2 2 23 GAIN ADJUST Monotonicity Guaranteed over Temperature CONTROL CIRCUIT BIT 3 3 22 +V Guaranteed for Operation with 12 V Supplies S BIT 4 4 21 COMMON Improved Replacement for Standard DAC80, DAC800 12-BIT BIT 5 5 20 SUMMING JUNCTION Hl-5680 RESISTOR LADDER 5k BIT 6 6 19 20V RANGE High Stability, High Current Output NETWORK 5k BIT 7 7 AND 18 10V RANGE Buried Zener Reference CURRENT BIT 8 8 17 BIPOLAR OFFSET Laser Trimmed to High Accuracy SWITCHES 6.3k BIT 9 9 16 REF INPUT 1/2 LSB Max Nonlinearity BIT 10 10 15 V Low Cost Plastic Packaging OUT + BIT 11 11 14 V S ADDAC80 (LSB) BIT 12 12 13 NC/+V * L *NC = CBI VERSIONS 5V CCD VERSIONS PRODUCT DESCRIPTION The ADDAC80 Series is a family of low cost 12-bit digital-to- (MSB) BIT 1 1 24 V OUT REF analog converters with both a high stability voltage reference REF BIT 2 2 23 GAIN ADJUST CONTROL and output amplifier combined on a single monolithic chip. CIRCUIT BIT 3 3 22 +V S The ADDAC80 Series is recommended for all low cost 12-bit D/A BIT 4 4 21 COMMON converter applications where reliability and cost are of paramount 12-BIT BIT 5 5 20 SCALING NETWORK RESISTOR importance. 2k LADDER BIT 6 6 19 SCALING NETWORK NETWORK 5k Advanced circuit design and precision processing techniques BIT 7 7 AND 18 SCALING NETWORK CURRENT 5k result in significant performance advantages over conventional BIT 8 8 17 BIPOLAR OFFSET SWITCHES 6.3k DAC80 devices. Innovative circuit design reduces the total BIT 9 9 16 REF INPUT power consumption to 300 mW, which not only improves reli- BIT 10 10 15 I OUT ability, but also improves long term stability. BIT 11 11 14 V S (LSB) BIT 12 12 13 NC/+V * L The ADDAC80 incorporates a fully differential, nonsaturating *NC = CBI VERSIONS precision current switching cell structure which provides greatly 5V CCD VERSIONS increased immunity to supply voltage variation. This same struc- ture also reduces nonlinearities due to thermal transients as the PRODUCT HIGHLIGHTS various bits are switched nearly all critical components operate 1. The ADDAC80 series of D/A converters directly replaces all at constant power dissipation. High stability, SiCr thin film other devices of this type with significant increases in performance. resistors are trimmed with a fine resolution laser, resulting in lower differential nonlinearity errors. A low noise, high stability, 2. Single chip construction and low power consumption pro- subsurface Zener diode is used to produce a reference voltage vides the optimum choice for applications where low cost with excellent long term stability, high external current capabil- and high reliability are major considerations. ity and temperature drift characteristics which challenge the 3. The high speed output amplifier has been designed to settle best discrete Zener references. within 1/2 LSB for a 10 V full scale transition in 2.0 s, when The ADDAC80 Series is available in three performance grades properly compensated. and three package types. The ADDAC80 is specified for use 4. The precision buried Zener reference can supply up to 2.5 mA over the 0C to 70C temperature range and is available in for use elsewhere in the application. both plastic and ceramic DIP packages. The ADDAC85 and 5. The low TC binary ladder guarantees that all units are mono- ADDAC87 are available in hermetically sealed ceramic packages tonic over the specified temperature range. and are specified for the 25C to +85C and 55C to +125C temperature ranges. 6. System performance upgrading is possible without redesign. REV. B Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. use, nor for any infringements of patents or other rights of third parties that Tel: 781/329-4700 www.analog.com may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Fax: 781/326-8703 Analog Devices, Inc., 2002 OBSOLETE(T = 25 C, rated power supplies A ADDAC80/ADDAC85/ADDAC87SPECIFICATIONS unless otherwise noted.) ADDAC80 ADDAC85 ADDAC87 Model Min Typ Max Min Typ Max Min Typ Max Unit TECHNOLOGY Monolithic Monolithic Monolithic DIGITAL INPUT BinaryCBI 12 12 12 Bits BCDCCD Digits Logic Levels (TTL Compatible) V (Logic 1) 2.0 5.5 2.0 5.5 2.0 5.5 V IH V (Logic 0) 0 0.8 0 0.8 0 0.8 V IL I (V = 5.5 V) 250 250 250 A IH IH I (V = 0.8 V) 100 100 100 A IL IL TRANSFER CHARACTERISTICS ACCURACY Linearity Error 25C 1 CBI 1/2 1/2 1/2 LSB CCD LSB T T to T 1/4 1/2 1/4 1/2 1/2 3/4 LSB A MIN MAX Differential Linearity Error 25C CBI 3/4 3/4 3/4 LSB CCD LSB T T to T 3/4 1 1 LSB A MIN MAX 2 3 Gain Error 0.1 0.3 0.1 0.2 0.1 0.2 %FSR 2 3 Offset Error 0.05 0.15 0.05 0.1 0.05 0.1 %FSR Temperature Range for Guaranteed Monotonicity 0 +70 25 +85 55 +125 C DRIFT (T to T ) MIN MAX Total Bipolar Drift, max (includes gain, offset, and linearity drifts) 20 20 30 ppm of FSR/C 4 Total Error (T to T ) MIN MAX Unipolar 0.08 0.15 0.12 0.2 0.18 0.3 % of FSR Bipolar 0.06 0.10 0.08 0.12 0.14 0.24 % of FSR Gain Including Internal Reference 15 30 20 20 ppm of FSR/C Gain Excluding Internal Reference 4 7 10 10 ppm of FSR/C Unipolar Offset 1 3 3 3 ppm of FSR/C Bipolar Offset 5 10 10 10 ppm of FSR/C CONVERSION SPEED 5 Voltage Model (V) Settling Time to 0.01% of FSR for FSR Change (2 k 500 pF load) with 10 k Feedback 3 4 3 4 3 4 s with 5 k Feedback 2 3 2 3 2 3 s For LSB Change 1 1 1 s Slew Rate 10 10 10 V/ s ANALOG OUTPUT Voltage Models RangesCBI 2.5, 5, 2.5, 5, 2.5, 5, V 10, +5, 10, +5, 10, +5, V 10 10 10 V CCD V Output Current 5 5 5mA Output Impedance (dc) 0.05 0.05 0.05 Short Circuit Current 40 40 40 mA Internal Reference Voltage (V ) 6.23 6.3 6.37 6.23 6.3 6.37 6.23 6.3 6.37 V R Output Impedance 1.5 1.5 1.5 6 Max External Current 2.5 2.5 2.5 mA Tempco of Drift 10 20 10 20 10 ppm of V /C R POWER SUPPLY SENSITIVITY 15 V 10%, 5 V supply when applicable 0.002 0.002 0.002 % of FSR/%V S 12 V 5% 0.002 0.002 0.002 % of FSR/%V S POWER SUPPLY REQUIREMENTS Rated Voltages 15 15 15 V Range 7 7 7 Analog Supplies 11.4 16.5 11.4 16.5 11.4 16.5 V Logic Supplies V Supply Drain +12 V, +15 V 5 10 5 10 5 10 mA 12 V, 15 V 14 20 14 20 14 20 mA 2 REV. B OBSOLETE