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AD420 Datasheet(PDF) 3 Page - Analog Devices |
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AD420 Datasheet(HTML) 3 Page - Analog Devices |
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3 / 11 page  REV. F –3– AD420 ABSOLUTE MAXIMUM RATINGS* VCC to GND AD420AR/AN-32 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 V IOUT to GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . VCC Digital Inputs to GND . . . . . . . . . . . . . . . . . . . –0.5 V to +7 V Digital Output to GND . . . . . . . . . . . . . –0.5 V to VLL + 0.3 V VLL and REF OUT: Outputs Safe for Indefinite Short to Ground Storage Temperature . . . . . . . . . . . . . . . . . . –65 °C to +150°C Lead Temperature (Soldering, 10 sec) . . . . . . . . . . . . +300 °C Thermal Impedance: SOIC (R) Package . . . . . . . . . . . . . . . . . . . . . . θ JA = 75 °C/W PDIP (N) Package . . . . . . . . . . . . . . . . . . . . . . θ JA = 50 °C/W *Stresses above those listed under Absolute Maximum Ratings may cause perma- nent damage to the device. This is a stress rating only; functional operation of the device at these or any other conditions above those indicated in the operational section of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. ORDERING GUIDE Temperature Max Operating Package Model Range Voltage Options* AD420AN-32 – 40 °C to +85°C 32 V N-24 AD420AR-32 – 40 °C to +85°C 32 V R-24 *N = Plastic DIP, R = Plastic SOIC. PIN DESIGNATIONS TOP VIEW (Not to Scale) AD420 NC = NO CONNECT NC CAP2 NC VCC NC VLL FAULT DETECT RANGE SELECT 2 IOUT BOOST CAP1 RANGE SELECT 1 CLEAR LATCH CLOCK DATA IN DATA OUT REF IN OFFSET TRIM VOUT GND NC REF OUT NC CAUTION ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily accumulate on the human body and test equipment and can discharge without detection. Although the AD420 features proprietary ESD protection circuitry, permanent damage may occur on devices subjected to high energy electrostatic discharges. Therefore, proper ESD precautions are recommended to avoid performance degradation or loss of functionality. AD420 VCC 4k 40 BOOST IOUT VOUT FAULT DETECT GND CAP 1 OFFSET TRIM VLL REF OUT REF IN DATA OUT CLEAR LATCH CLOCK DATA IN RANGE SELECT 1 RANGE SELECT 2 1.25k REFERENCE CLOCK 16-BIT DAC DATA I/P REGISTER 19 20 21 23 14 15 16 17 18 6 7 8 9 10 11 2 3 4 5 SWITCHED CURRENT SOURCES AND FILTERING CAP 2 Figure 1. Functional Block Diagram Table I. Truth Table Inputs Range Range CLEAR Select 2 Select 1 Operation 0 X X Normal Operation 1 X X Output at Bottom of Span X 0 0 0 V–5 V Range X 0 1 4 mA–20 mA Range X 1 0 0 mA–20 mA Range X 1 1 0 mA–24 mA Range WARNING! ESD SENSITIVE DEVICE |
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