AD688BQ Analog Devices Inc, AD688BQ Datasheet
AD688BQ
Specifications of AD688BQ
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AD688BQ Summary of contents
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FEATURES ±10 V tracking outputs Kelvin connections Low tracking error: 1.5 mV Low initial error: 2.0 mV Low drift: 1.5 ppm/°C Low noise: 6 μV p-p Flexible output force and sense terminals High impedance ground sense Wide body SOIC and ...
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AD688 TABLE OF CONTENTS Specifications..................................................................................... 3 Absolute Maximum Ratings............................................................ 4 ESD Caution.................................................................................. 4 Pin Configuration and Function Descriptions............................. 5 Theory of Operation ........................................................................ 6 Applications....................................................................................... 7 Calibration..................................................................................... 7 Noise Performance and Reduction ............................................ 8 REVISION HISTORY 3/05—Rev Rev. ...
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... Gain and balance adjustments guaranteed capable of trimming output voltage error and symmetry error to zero. 3 Test Conditions +18 V, −V = – +13.5 V, − Specifications shown in boldface are tested on all production units at AD688AQ AD688BQ Min Typ Max Min Typ −5 +5 −2 −3 +3 −1.5 ±2 – ...
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AD688 ABSOLUTE MAXIMUM RATINGS Table 2. Parameter Rating +V to − Power Dissipation (25°C) Q Package 600 mW Storage Temperature −65°C to +150°C Lead Temperature +300°C (Soldering Package Thermal Resistance Q (θ /θ ) ...
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PIN CONFIGURATION AND FUNCTION DESCRIPTIONS Table 3. Pin Function Descriptions Pin No. Mnemonic Description 1 +10 V OUT FORCE +10 V Output with Kelvin Force. Connect to Pin Positive Power Supply +10 V OUT SENSE ...
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AD688 THEORY OF OPERATION The AD688 consists of a buried Zener diode reference, amplifiers and associated thin-film resistors as shown in Figure 3. The temperature compensation circuitry provides the device with a temperature coefficient of 1.5 ppm/°C or less. Amplifier ...
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APPLICATIONS The AD688 can be configured to provide ±10 V reference outputs as shown in Figure 4. The architecture of the AD688 provides ground sense and uncommitted output buffer amplifiers which offer the user a great deal of functional flexibility. ...
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AD688 NOISE PERFORMANCE AND REDUCTION The noise generated by the AD688 is typically less than 6 µV p-p over the 0 band. Noise MHz bandwidth is approximately 840 µV p-p. The dominant source ...
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... A3 and A4. Rev Page MAXIMUM OUTPUT CHANGE (mV) DEVICE GRADE 0 TO +70°C –40°C TO +85°C AD688AQ 1.40 (TYP) AD688BQ 1.05 AD688ARWZ Figure 12. Maximum + −10 V Output Change ) at the load. The Kelvin connection of Figure 13b and the voltage at the load would be the desired ERROR 10V – ...
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AD688 100 80 GAIN 60 40 PHASE 20 0 –20 10 100 1k 10k 100k FREQUENCY (Hz) Figure 14. A3, A4 Open-Loop Frequency Response 110 V V 100 100 1k 10k FREQUENCY (Hz) Figure ...
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DYNAMIC PERFORMANCE The output buffer amplifiers (A3 and A4) are designed to provide the AD688 with static and dynamic load regulation superior to less complete references. Many A/D and D/A converters present transient current loads to the reference, and poor ...
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AD688 V OUT A4 1kΩ + 10V 10V V L – 0V Figure 27. Load Crosstalk Test Circuit 1mV 5V 100 90 V OUT Figure 28. Load Crosstalk Attempts to drive a large capacitive load (in ...
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... OUTLINE DIMENSIONS 0.200 (5.08) 0.200 (5.08) 0.125 (3.18) 0.30 (0.0118) 0.10 (0.0039) COPLANARITY ORDERING GUIDE Initial Temperature Model Error Coefficient AD688AQ ppm/°C AD688BQ ppm/°C 1 AD688ARWZ ppm/° Pb-free part. 0.005 0.098 (2.49) 0.310 (7.87) (0.13) MAX MIN 0.220 (5.59) ...
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AD688 NOTES Rev Page ...
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NOTES Rev Page AD688 ...
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AD688 NOTES © 2005 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. C00815-0-3/05(B) Rev Page ...