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AD7821 датащи(PDF) 4 Page - Analog Devices |
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AD7821 датащи(HTML) 4 Page - Analog Devices |
4 / 16 page AD7821 REV. B –4– ABSOLUTE MAXIMUM RATINGS * VDD to GND . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3 V, + 7 V VSS to GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . +0.3 V, + 7 V Digital Input Voltage to GND (Pins 6–8, 13) . . . . . . . . . . . . . . . . . . . –0.3 V, VDD + 0.3 V Digital Output Voltage to GND (Pins 2–5, 9, 14–18) . . . . . . . . . . . . . . . –0.3 V, VDD + 0.3 V VREF(+) to GND . . . . . . . . . . . . . . . VSS – 0.3 V, VDD + 0.3 V VREF(–) to GND . . . . . . . . . . . . . . . VSS – 0.3 V, VDD + 0.3 V VIN to GND . . . . . . . . . . . . . . . . . . . VSS – 0.3 V, VDD + 0.3 V Operating Temperature Range Commercial (K Version) . . . . . . . . . . . . . . –40 °C to +85°C Industrial (B Version) . . . . . . . . . . . . . . . . –40 °C to +85°C Extended (T Version) . . . . . . . . . . . . . . . –55 °C to +125°C Storage Temperature Range . . . . . . . . . . . . –65 °C to +150°C Lead Temperature (Soldering, 10 sec) . . . . . . . . . . . . +300 °C Power Dissipation (Any Package) to +75 °C . . . . . . . 450 mW Derates above +75 °C by . . . . . . . . . . . . . . . . . . . . . 6 mW/°C *Stresses above those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress rating only and functional operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. PIN CONFIGURATIONS DIP AND SOIC LCCC PLCC WARNING! ESD SENSITIVE DEVICE 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 AD7821 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. PIN FUNCTION DESCRIPTIONS Pin Mnemonic Description 1VIN Analog Input: Range VREF(–) ≤ V IN ≤ V REF(+) 2 DB0 Three-State Data Output (LSB) 3–5 DB1–DB3 Three-State Data Outputs 6 WR/RDY WRITE control input/READY status output. See Digital Interface section. 7 MODE Mode Selection Input. It determines whether the device operates in the WR-RD or RD mode. This input is internally pulled low through a 50 µA current source. See Digital Interface section. 8 RD READ Input. RD must be low to access data from the part. See Digital Interface section. 9 INT INTERRUPT Output. INT going low indicates that the conversion is complete. INT returns high on the rising edge of CS or RD. See Digital Interface section. 10 GND Ground 11 VREF(–) Lower limit of reference span. Range: VSS ≤ V REF(–) ≤ V REF(+). 12 VREF(+) Upper limit of reference span. Range: VREF(–) < VREF(+) ≤ V DD. 13 CS Chip Select Input. The device is selected when this input is low. 14–16 DB4–DB6 Three-State Data Outputs 17 DB7 Three-State Data Output (MSB) 18 OFL Overflow Output. If the analog input is higher than (VREF(+) – 1/2 LSB), OFL will be low at the end of conversion. It is a non-three-state output which can be used to cascade two or more devices to increase resolution. 19 VSS Negative Supply Voltage VSS = 0 V; Unipolar Operation VSS = –5 V; Bipolar Operation 20 VDD Positive Supply Voltage, +5 V |
Аналогичный номер детали - AD7821 |
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