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ADM1485JCHIPS データシート(PDF) 3 Page - Analog Devices |
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ADM1485JCHIPS データシート(HTML) 3 Page - Analog Devices |
3 / 11 page REV. ADM1485 –3– ABSOLUTE MAXIMUM RATINGS * (TA = 25 °C, unless otherwise noted.) VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3 V to +7 V Inputs Driver Input (DI) . . . . . . . . . . . . . . . . –0.3 V to VCC + 0.3 V Control Inputs (DE, RE) . . . . . . . . . .–0.3 V to V CC + 0.3 V Receiver Inputs (A, B) . . . . . . . . . . . . . . . . . . –9 V to +14 V Outputs Driver Outputs (A, B) . . . . . . . . . . . . . . . . . . –9 V to +14 V Receiver Output . . . . . . . . . . . . . . . . . –0.5 V to VCC + 0.5 V Power Dissipation 8-Lead MSOP . . . . . . . . . . . . . . . 900 mW θ JA, Thermal Impedance . . . . . . . . . . . . . . . . . . . 206 °C/W Power Dissipation 8-Lead PDIP . . . . . . . . . . . . . . . . 500 mW θJA, Thermal Impedance . . . . . . . . . . . . . . . . . . . 130°C/W Power Dissipation 8-Lead SOIC . . . . . . . . . . . . . . . . 450 mW θJA, Thermal Impedance . . . . . . . . . . . . . . . . . . . 170°C/W Operating Temperature Range Commercial (J Version) . . . . . . . . . . . . . . . . . . 0 °C to 70°C Industrial (A Version) . . . . . . . . . . . . . . . . –40 °C to +85°C Storage Temperature Range . . . . . . . . . . . –65 °C to +150°C Lead Temperature (Soldering, 10 sec) . . . . . . . . . . . . . 300 °C Vapor Phase (60 sec) . . . . . . . . . . . . . . . . . . . . . . . . . 215 °C Infrared (15 sec) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 220 °C *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 listed in the operational sections of this specification is not implied. Exposure to absolute maximum ratings for extended periods of time may affect device reliability. PIN FUNCTION DESCRIPTIONS Pin Mnemonic Function No. 1 RO Receiver Output. When enabled if A > B by 200 mV, then RO = High. If A < B by 200 mV, then RO = Low. 2 RE Receiver Output Enable. A low level enables the receiver output, RO. A high level places it in a high impedance state. 3 DE Driver Output Enable. A high level enables the driver differential outputs, A and B. A low level places it in a high impedance state. 4 DI Driver Input. When the driver is enabled, a logic low on DI forces A low and B high while a logic high on DI forces A high and B low. 5 GND Ground Connection, 0 V. 6 A Noninverting Receiver Input A/Driver Output A. 7 B Inverting Receiver Input B/Driver Output B 8VCC Power Supply, 5 V ± 5%. PIN CONFIGURATION TOP VIEW (Not to Scale) 8 7 6 5 1 2 3 4 RO RE DE VCC B A GND DI ADM1485 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 ADM1485 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. Table I. Transmitting Inputs Outputs DE DI B A 11 0 1 10 1 0 0X Z Z Table II. Receiving Inputs Outputs RE A-B RO 0 ≥ +0.2 V 1 0 ≤ –0.2 V 0 0 Inputs Open 1 1X Z |
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