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ES5128 Arkusz danych(PDF) 5 Page - Cyrustek corporation |
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ES5128 Arkusz danych(HTML) 5 Page - Cyrustek corporation |
5 / 10 page V1.0 06/03/10 5 ES5128 4-1/2 digit with LED Function Description 1. Normal Operation When ES5128 operates at the oscillation frequency of 120KHz, the conversion period will be 500ms. And the less frequency it has, the longer time it takes to complete one conversion. ES5128 takes input signal from pins IN_LO and IN_HI differentially, and take reference from pins REF_LO and REF_HI. The typical reference voltage is about 1V. A filter capacitor and a protective resistor are recommended at IN_HI and IN_LO terminal as the test circuit of page7. 2. Range Change Function ES5128 has 2 operation ranges such as 200.00mV and 2.0000V. When the pin RANGE is pulled to DGND or keep floating, ES5128 operates at 200.00mV full-scale range. When it is pulled to V+, ES5128 change the input full-scale range to 2.0000V. And the output data still remain the maximum counting number ±19,999. 3. Data Hold Function ES5128 support a data hold function to stop the LED panel upgrading and hold the final data. When the pin HOLD keeps floating, ES5128 operates in free run mode, and the data upgrades after every conversion. When it is pulled to V+, ES5128 enters HOLD mode, the LED panel stops upgrading the output data, And the final data before the HOLD mode is activated is held. 4. Decimal Points Controlled ES5128 can drive 4 decimal points on LED panel. It provides four pins DP1, DP2, DP3 and DP4 to control the decimal points. Connect the pins DP1~DP4 to V+ will turn on the relative decimal points. To turn it off, keep it floating or connect it to DGND. |
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