Datasheet AD588 (Analog Devices)

Multiple Output, High Precision, Dual-Tracking Reference Data Sheet AD588 FEATURES FUNCTIONAL BLOCK DIAGRAM Low drift: 1.5 ppm/°C NOISE A3 OUT V REDUCTION HIGH A3 IN SENSE Low initial error: 1 mV 7 6 4 3 Pin programmable output +10 V, +5 V, ±5 V tracking, −5 V, −10 V A3 OUT A3 1 Flexible output force and sense terminals R FORCE B High impedance ground sense A1 16-lead SOIC package and 16-lead CERDIP A4 OUT 14 R1 R4 SENSE MIL-STD-883-compliant versions available A4 OUT R2 A4 15 GENERAL DESCRIPTION FORCE R5
The AD588 represents a major advance in state-of-the-art
R6 2 +VS R3
monolithic voltage references. Low initial error and low
AD588 A2
temperature drift give the AD588 absolute accuracy performance
16 –VS
previously not available in monolithic form. The AD588 uses a
5 9 10 8 12 11 13
proprietary ion-implanted, buried Zener diode and laser-wafer
GAIN GND GND VLOW BAL VCT A4 IN
001
ADJ SENSE SENSE ADJ
drift trimming of high stability thin film resistors to provide
+IN –IN
00531- outstanding performance. Figure 1. The AD588 includes the basic reference cel and three additional
PRODUCT HIGHLIGHTS
amplifiers that provide pin programmable output ranges. The amplifiers are laser trimmed for low offset and low drift to maintain 1. The AD588 offers 12-bit absolute accuracy without any the accuracy of the reference. The amplifiers are configured to user adjustments. Optional fine-trim connections are allow Kelvin connections to the load and/or boosters for driving provided for applications requiring higher precision. The long lines or high current loads, delivering the full accuracy of fine trimming does not alter the operating conditions of the AD588 where it is required in the application circuit. the Zener or the buffer amplifiers, and so does not increase the temperature drift. The low initial error allows the AD588 to be used as a system 2. Output noise of the AD588 is very low, typically 6 µV p-p. reference in precision measurement applications requiring A pin is provided for additional noise filtering using an 12-bit absolute accuracy. In such systems, the AD588 can provide a external capacitor. known voltage for system calibration in software. The low drift 3. A precision ±5 V tracking mode with Kelvin output also al ows compensation for the drift of other components in a connections is available with no external components. system. Manual system calibration and the cost of periodic Tracking error is less than 1 mV, and a fine trim is available recalibration can, therefore, be eliminated. Furthermore, the for applications requiring exact symmetry between the mechanical instability of a trimming potentiometer and the +5 V and −5 V outputs. potential for improper calibration can be eliminated by using 4. Pin strapping capability allows configuration of a wide the AD588 in conjunction with auto calibration software. variety of outputs: ±5 V, +5 V, +10 V, −5 V, and −10 V dual The AD588 is available in seven versions. The AD588JQ and outputs or +5 V, −5 V, +10 V, and −10 V single outputs. AD588KQ are packaged in a 16-lead CERDIP and are specified for 0°C to +70°C operation. The AD588AQ and AD588BQ are packaged in a 16-lead CERDIP, and the AD588ARWZ is packaged in a 16-lead SOIC, and they are specified for the −25°C to +85°C industrial temperature range. The ceramic AD588TE and AD588TQ grades are specified for the full military/aerospace temperature range.
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Document Outline FEATURES GENERAL DESCRIPTION FUNCTIONAL BLOCK DIAGRAM PRODUCT HIGHLIGHTS TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS THEORY OF OPERATION APPLICATIONS INFORMATION CALIBRATION NOISE PERFORMANCE AND REDUCTION TURN-ON TIME TEMPERATURE PERFORMANCE KELVIN CONNECTIONS DYNAMIC PERFORMANCE USING THE AD588 WITH CONVERTERS AD7535 14-BIT DIGITAL-TO-ANALOG CONVERTER AD569 16-BIT DIGITAL-TO-ANALOG CONVERTER SUBSTITUTING FOR INTERNAL REFERENCES AD574A 12-BIT ANALOG-TO-DIGITAL CONVERTER RESISTANCE TEMPERATURE DETECTOR (RTD) EXCITATION BOOSTED PRECISION CURRENT SOURCE BRIDGE DRIVER CIRCUITS OUTLINE DIMENSIONS ORDERING GUIDE