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AD7709BR データシート(PDF) 8 Page - Analog Devices |
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AD7709BR データシート(HTML) 8 Page - Analog Devices |
8 / 17 page AD7709 –8– REV. PrA January 2001 PRELIMINARY TECHNICAL DATA PIN CONFIGURATION Pin Function Description Pin No Mnemonic Function 1 IOUT1 Output for internal excitation current sources. A single current source or any combination of the internal current sources I1,I2 and I3 can be switched to this output. 2 IOUT2 Output for internal excitation current sources. A single current source or any combination of the internal current sources I1,I2 and I3 can be switched to this output. 3 REFIN1(+) Positive reference input. REFIN(+) can lie anywhere between VDD and GND. The nominal reference voltage (REFIN(+)-REFIN(-)) is 2.5V but the part is functional with a reference range from 1V to VDD. 4 REFIN1(-) Negative reference input. This reference input can lie anywhere between GND and VDD-1V. 5 AIN1 Analog Input Channel 1. Programmable-gain analog input which can be used as a pseudo-differential input when used with AINCOM or as the positive in- put of a fully-differential input pair when used with AIN2. (see Communica- tions Register section) 6 AIN2 Analog Input Channel 2. Programmable-gain analog input which can be used as a pseudo-differential input when used with AINCOM or as the negative input of a fully-differential input pair when used with AIN1. (see Communica- tions Register section) 7 AIN3/P3 Analog Input Channel 3 or Digital Port Bit. Programmable-gain analog input which can be used as a pseudo-differential input when used with AINCOM or as the positive input of a fully-differential input pair when used with AIN4. The second function of this bit is as a general purpose digital input bit. 8 AIN4/P4 Analog Input Channel 4 or digital port bit. Programmable-gain analog input which can be used as a pseudo-differential input when used with AINCOM or as the negative input of a fully-differential input pair when used with AIN3. The second function of this bit is as a general purpose digital input bit. 9 AINCOM All analog inputs are referenced to this input when configured in pseudo-dif- ferential input mode. 10 REFIN2(+) Positive reference input. REFIN2(+) can lie anywhere between VDD and GND. The nominal reference voltage (REFIN2(+)-REFIN2(-)) is 2.5V but the part is functional with a reference range from 1V to VDD. TO P V IEW (No t to S cale) SCL K CS R E SET AIN1 AINCO M GN D V DD DIN DO UT DRDY REFIN1(-) REFIN1(+ ) AD7709 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 XTA L1 AIN3/P 3 AIN 2 21 22 23 24 AIN4/P 4 REFIN2(+ ) P2/S W 2 PW R G N D P1/S W 1 XTA L2 IO UT 1 IO UT 2 REFIN2(-) |
同様の部品番号 - AD7709BR |
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同様の説明 - AD7709BR |
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