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ADC-208ALC 데이터시트(PDF) 3 Page - Murata Power Solutions Inc. |
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ADC-208ALC 데이터시트(HTML) 3 Page - Murata Power Solutions Inc. |
3 / 4 page 7. Connect the converter appropriately; a typical connection circuit is shown in Figure 2. Then apply an appropriate clock input.The reference input should be held to ±0.1% accuracy or better. Do not use the +5V power supply as a reference without precision regulation and high-frequency decoupling capacitors. 8. Zero Adjustment - Adjusting the voltage at –REFERENCE (pin 3) adjusts the offset or zero of the device. Pin 3 can be tied to GROUND for operation without adjustments 9. Full Scale Adjustment - Adjusting the voltage at +REFERENCE (pin 9) adjusts the gain of the device. Pin 9 can be tied directly to a +5V reference for operation without adjustment. 10. Integral Nonlinearity Adjustments - Provision is made for optional adjustment of Integral Nonlinearity through access of the reference's ¼, ½, and ¾ full scale points. For example, the REF. MIDPOINT (pin 6) can be tied to a precision voltage halfway between +REFERENCE and –REFERENCE. Pins 6, 18 and 20 should be bypassed to GROUND through 0.1µF capacitors for operation without INL adjustments Figure 2. ADC-208A Typical Connection Diagram Table 1. ADC-208A Output Code Note: Values shown here are for a +5.12Vdc reference. Scale other refereces proportion- ally. (+REF=+5.12V, –REF=GND, ¼, ½, and ¾ References FS=No Connection) ANALOG INPUT CODE DATA 1234 DATA 5678 DECIMAL HEX 0.00V Zero 0000 0000 0000 0 00 +0.02V +1 LSB 0000 0001 1 01 +1.28V +¼ FS 0100 0000 64 40 +2.54V +½ FS-ILSB 0111 1111 127 7F +2.56V +½ FS 1000 0000 128 80 +2.58V +½ FS+ILSB 1000 0001 129 81 +3.84V +¾ FS 1100 0000 192 C0 +5.10V +FS 1111 1111 255 FF REF. D2 20MHz CLOCK VIN 5,7 R¾ CLOCK 2 HP2811 +5V +5V +15 +15V +15V –15 11 20 18 12 + + + + + + + 5 5 6 4 2 2 9 6 7 5 12 13 14 10 8 1 3 10 0.1μF 0.1μF 0.1μF 0.1μF 0.1μF 0.1μF 0.1μF 0.1μF 10 Ω 10k Ω 2k Ω 1k Ω 1k Ω 1k Ω 1.5k Ω 1.5k Ω 2k Ω 0.1μF 0.01μF 4.7μF 4.7μF 4.7μF 4.7μF 4.7μF 4.7μF 4.7μF HA-5033 LM324 1+N 1-N LM324 1+N 1-N LM324 1+N 1-N LM324 1+N 1-N 24 (LSB) 23 22 21 17 16 15 14 (MSB) B8 B7 B6 B5 B4 B3 B2 B1 R¼ ADC-208A 8-Bit, 20MSPS CMOS Flash A/D (ADC-208 Compatible) MDA_ADC-208A.B01 Page 3 of 4 Technical enquiries email: sales@murata-ps.com, tel: +1 508 339 3000 www.murata-ps.com |
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