Datasheet AD588 (Analog Devices) - 15
| 制造商 | Analog Devices |
| 描述 | Multiple Output, High Precision, Dual Tracking Reference |
| 页数 / 页 | 20 / 15 — Data Sheet. AD588. USING THE AD588. WITH CONVERTERS. AD569. 16-BIT … |
| 修订版 | M |
| 文件格式/大小 | PDF / 550 Kb |
| 文件语言 | 英语 |
Data Sheet. AD588. USING THE AD588. WITH CONVERTERS. AD569. 16-BIT DIGITAL-TO-ANALOG CONVERTER. AD7535 14
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Data Sheet AD588 USING THE AD588 WITH CONVERTERS
The AD588 is an ideal reference for a wide variety of analog-to-
AD569 16-BIT DIGITAL-TO-ANALOG CONVERTER
digital and digital-to-analog converters. Several representative Another application that ful y utilizes the capabilities of the AD588 examples follow. is supplying a reference for the AD569, as shown in Figure 33.
AD7535 14 -BIT DIGITAL-TO-ANALOG CONVERTER
Amplifier A2 senses system common and forces VCT to assume this value, producing +5 V and −5 V at Pin 6 and Pin 8, respectively. High resolution CMOS digital-to-analog converters require a Amplifier A3 and Amplifier A4 buffer these voltages out to the reference voltage of high precision to maintain rated accuracy. appropriate reference force-sense pins of the AD569. The full The combination of the AD588 and AD7535 takes advantage of Kelvin scheme eliminates the effect of the circuit traces or wires and the initial accuracy, drift, and ful Kelvin output capability of the the wire bonds of the AD588 and AD569 themselves, which would AD588, as wel as the resolution, monotonicity, and accuracy of the otherwise degrade system performance. AD7535 to produce a subsystem with outstanding characteristics (see Figure 32).
N.C. VDD 28 26 VREFS 1 3 RFS 7 6 4 3 14-BIT DAC 4 IOUT V +10V REF A3 1 2 RB 14 AD7535 A1 AD588 AGNDS 14 5 R1 R4 DAC REGISTER 23 LDAC AGNDF R2 A4 15 6 R5 MS LS 24 CSLSB INPUT INPUT R6 2 +V REGISTER REGISTER S R3 22 CSMSB A2 16 –VS 25 WR 5 9 10 8 12 11 13
032
8 21 7 27 DB13 DB0 DGND VSS
00531- Figure 32. AD588/AD7535 Connections
+12V –12V +VS –VS 2 16 6 4 1 28 A V 3 + IN H A3 +VREF OUT FORCE A3 1 3 +VREF A3 – IN +5V AD569 SENSE 3 2 A1 10kΩ 12 S S S E E VCT E L L 11 G T V E E OUT M A 17 10kΩ –5V TO A C C 2 – IN E P +5V 10 T T A2 N A O O 2 + IN T 9 R R –VREF A4 – IN –5V SENSE 14 16 AD588 A4 –VREF OUT FORCE A4 15 15 VL A4 + IN 8 13 8 MSBs 8 LSBs GND 18 LATCHES 13 14 12 9 7 4 19 22 24 27 8 23
033
CS LDAC HBE LBE DB15 DB0
00531- Figure 33. High Accuracy ±5 V Tracking Reference for AD569 Rev. M | Page 15 of 20 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
Data Sheet AD588 USING THE AD588 WITH CONVERTERS
The AD588 is an ideal reference for a wide variety of analog-to-
AD569 16-BIT DIGITAL-TO-ANALOG CONVERTER
digital and digital-to-analog converters. Several representative Another application that ful y utilizes the capabilities of the AD588 examples follow. is supplying a reference for the AD569, as shown in Figure 33.
AD7535 14 -BIT DIGITAL-TO-ANALOG CONVERTER
Amplifier A2 senses system common and forces VCT to assume this value, producing +5 V and −5 V at Pin 6 and Pin 8, respectively. High resolution CMOS digital-to-analog converters require a Amplifier A3 and Amplifier A4 buffer these voltages out to the reference voltage of high precision to maintain rated accuracy. appropriate reference force-sense pins of the AD569. The full The combination of the AD588 and AD7535 takes advantage of Kelvin scheme eliminates the effect of the circuit traces or wires and the initial accuracy, drift, and ful Kelvin output capability of the the wire bonds of the AD588 and AD569 themselves, which would AD588, as wel as the resolution, monotonicity, and accuracy of the otherwise degrade system performance. AD7535 to produce a subsystem with outstanding characteristics (see Figure 32).
N.C. VDD 28 26 VREFS 1 3 RFS 7 6 4 3 14-BIT DAC 4 IOUT V +10V REF A3 1 2 RB 14 AD7535 A1 AD588 AGNDS 14 5 R1 R4 DAC REGISTER 23 LDAC AGNDF R2 A4 15 6 R5 MS LS 24 CSLSB INPUT INPUT R6 2 +V REGISTER REGISTER S R3 22 CSMSB A2 16 –VS 25 WR 5 9 10 8 12 11 13
032
8 21 7 27 DB13 DB0 DGND VSS
00531- Figure 32. AD588/AD7535 Connections
+12V –12V +VS –VS 2 16 6 4 1 28 A V 3 + IN H A3 +VREF OUT FORCE A3 1 3 +VREF A3 – IN +5V AD569 SENSE 3 2 A1 10kΩ 12 S S S E E VCT E L L 11 G T V E E OUT M A 17 10kΩ –5V TO A C C 2 – IN E P +5V 10 T T A2 N A O O 2 + IN T 9 R R –VREF A4 – IN –5V SENSE 14 16 AD588 A4 –VREF OUT FORCE A4 15 15 VL A4 + IN 8 13 8 MSBs 8 LSBs GND 18 LATCHES 13 14 12 9 7 4 19 22 24 27 8 23
033
CS LDAC HBE LBE DB15 DB0
00531- Figure 33. High Accuracy ±5 V Tracking Reference for AD569 Rev. M | Page 15 of 20 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