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ES5120 数据表(PDF) 11 Page - Cyrustek corporation |
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ES5120 数据表(HTML) 11 Page - Cyrustek corporation |
11 / 29 page ES5120 3 3/4 DIGIT A/D CONVERTER Pin No. Pin No. (40-pin (44-pin Flat Package) Package) Symbol Descrlption 23 19 BUZIN Buzzer control input. Connecting BUZIN to V+ turns the buzzer on. BUZIN is logically ORed(internally) with the "logic level low" input. There is an internal 5μA pulldown to DGND. 24 20 FREQ/ VOLTS Voltage or frequency measurement select input. When connected to DGND, the a-d converter function is active. When connected to V + the frequency counter function is active. This pin has an internal 5μA pulldown to DGND. 25 21 PKHOLD Peak Hold input. When connected to V+, the converter will only update the display if a new conversion value is greater than the preceeding value. Thus, the peak reading will be stored and held indefinitely. When unconnected or connected to DGND, the converter will operate normally. This pin has an internal 5μA pulldown to DGND. (Note : This pin may be with the function of EOC/HOLD which depends on chip bonding.) 22 UR Underrange output. This output will be high when the digital reading is 380 counts or less. 23 OR Overrange output. This output will be high when the analog signal input is greater than full scale. The LCD will display "OL" when the input is overranged. |
类似零件编号 - ES5120 |
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类似说明 - ES5120 |
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