AD694AQ Analog Devices Inc, AD694AQ Datasheet
AD694AQ
Specifications of AD694AQ
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AD694AQ Summary of contents
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FEATURES 4–20 mA, 0–20 mA Output Ranges Precalibrated Input Ranges Precision Voltage Reference Programmable to 2.000 V or 10.000 V Single or Dual Supply Operation Wide Power Supply Range: ...
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... Alarm Pin Current (Pin 10) POWER REQUIREMENTS Specified Performance Operating Range REF FS REF Quiescent Current Off TEMPERATURE RANGE 5 Specified Performance AD694AQ/BQ/AR/BR –40 AD694JN Operating AD694AQ/BQ/AR/BR –55 AD694JN (@ + 250 , and V = +24 V, unless otherwise noted AD694JN/AQ/AR Min Typ Max Min –0.2 V –2 –2.5 V –0.2 ...
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... All pins are rated for a minimum of 4000 V protection, except for Pins 2, 3 and 9 which are rated to survive a minimum of 1500 V. ESD testing conforms to Human Body Model. Always practice ESD prevention. (13). S Model AD694JN AD694AQ AD694AR AD694BQ AD694BR *N = Plastic DIP CERDIP SOIC –3– AD694 AD694BQ/BR ...
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AD694 Typical Minimum Supply Voltage vs. Temperature for 2 V and 10 V Full Scale Maximum R vs. Supply Voltage L Voltage Reference Power Supply Rejection I : Voltage Compliance vs. Temperature OUT FUNCTIONAL DESCRIPTION The operation of the AD694 ...
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NPN pass transistor can be added to transfer most of the power dissipation off-chip, to extend the temperature range of operation. The output stage is current-limited at approximately protect the output from an overdrive at its ...
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AD694 An NPN boost transistor can be added in the 2 V mode to in- crease the current drive capability of the 2 V reference. The 10 V force pin is connected to the base of the NPN, and the ...
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Figure 4. Using Optional Pass Transistor to Minimize Self-Heating Errors; Dual Supply Operation Shown POWER DISSIPATION CONSIDERATIONS The AD694 is rated for operation over its specified temperature without the use of an external pass transistor. However possible to ...
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AD694 Figure 6 will give an approximately linear adjustment of the 4 mA offset within fixed limits. To find the proper resistor val- ues, first select X, the desired range of adjustment as a fraction of 4 mA. Substitute this ...
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Figure 8. Span Adjustment Full Scale PROGRAMMING OTHER SPANS There are two methods for programming input spans less than 10 V. The first decreases the input span by programming a non- inverting gain into the buffer amplifier. For ...
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AD694 Figure 11. Buffer Amplifier V APPLICATIONS CURRENT OUTPUT DAC INTERFACE The AD694 can be easily interfaced to current output DACs such as the AD566A to construct a digital to 4–20 mA interface as shown in Figure 13. The AD694 ...
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Figure 13. Digital to 4–20 mA Interface Using a Current Steering DAC Figure 14. Single-Supply Digital Input to 4–20 mA Output code dependent, and the response time of the circuit will be de- termined by the reaction of the voltage ...
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AD694 The circuit shown, will convert a positive differential signal 4–20 mA current. The circuit has common-mode range The low end of the common-mode range is limited by the ...
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Ceramic DIP-Glass Hermetic Seal Package [CERDIP] 5.08 (0.2000) MAX 5.08 (0.2000) 3.18 (0.1252) 0.58 (0.0228) 0.36 (0.0142) 5.33 (0.2098) 4.06 (0.1598) 2.93 (0.1154) 0.30 (0.0118) 0.10 (0.0039) COPLANARITY REV. B OUTLINE DIMENSIONS (Q-16) Dimensions shown in millimeters and (inches) ...
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AD694 Revision History Location 8/02—Data Sheet changed from REV REV. B. Updated Outline Dimensions . . . . . . . . . . . . . . . . . . . . . . . . ...
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REV. B –15– ...
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–16– ...