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ADC-HZ12BMM-QL Fiches technique(PDF) 5 Page - Murata Power Solutions Inc. |
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ADC-HZ12BMM-QL Fiches technique(HTML) 5 Page - Murata Power Solutions Inc. |
5 / 6 page CALIBRATION PROCEDURE 1. Connect the converter for bipolar or unipolar operation. Use the input connection table for the desired input voltage range and input impedance. Apply START CONVERT pulses of 100 nanoseconds minimum duration to pin 21. The spacing of the pulses should be no less than the maximum conversion time. 2. Zero and Offset Adjustments Apply a precision voltage reference source between the selected analog input and ground. Adjust the output of the reference source to the value shown in the Calibration Table for the unipolar zero adjustment (zero + 1/2LSB) or the bipolar offset adjustment (–FS + 1/2LSB). Adjust the trimming potentiometer so that the output code flickers equally between 1111 1111 1111 and 1111 1111 1110. 3. Full Scale Adjustment Change the output of the precision voltage reference source to the value shown in the Calibration Table for the unipolar or bipolar gain adjustment (+FS – 1.5LSB). Adjust the gain trimming potentiometer so that the output code flickers equally between 0000 0000 0001 and 0000 0000 0000. TIMING DIAGRAM FOR ADC-HX, ADC-HZ OUTPUT: 101010101010 TIMING DIAGRAM OPERATING PERIODS ADC-HX ADC-HZ T1 20μs 8μs T2 1.56μs 0.56μs 1 2 3 4 5 6 7 8 9 10 11 12 13 START CONVERT E.O. C. (S TA TUS) CLOCK OUT SERI AL DATA OU T BIT 1 (M SB ) BIT 2 BIT 4 BIT 12 (L SB ) T1 T2 100ns mi n. 60ns 40ns 100ns 40ns 40ns BIT 1 (MSB) BIT 3 BIT 5 BIT 6 BIT 7 BIT 8 BIT 9 BIT 10 BIT 11 BIT 12 (LSB) 50ns PARALLEL DATA NOW VALID 1 BIT 2 BIT 3 0 0 1 0 1 0 1 0 1 0 1 0 1 0 1 CALIBRATION TABLE UNIPOLAR RANGE ADJUST. INPUT VOLTAGE 0 to + 5V ZERO GAIN + 0.6 mV + 4.9982V 0 to + 10V ZERO GAIN + 1.2 mV + 9.9963V BIPOLAR RANGE ± 2.5V OFFSET GAIN -2.4994V + 2.4982V ± 5V OFFSET GAIN – 4.9988V + 4.9963V ± 10V OFFSET GAIN – 9.9976V + 9.9927V ADC-HX, ADC-HZ Series 12-Bit, 8 and 20μsec Analog-to-Digital Converters Technical enquiries email: sales@murata-ps.com, tel: +1 508 339 3000 www.murata-ps.com MDA_ADCHXHZ.B01 Page 5 of 6 |
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