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ADC12030 Datasheet(PDF) 3 Page - Texas Instruments |
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ADC12030 Datasheet(HTML) 3 Page - Texas Instruments |
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3 / 52 page  ADC12030, ADC12032, ADC12034 ADC12038, ADC12H030, ADC12H032 ADC12H034, ADC12H038 www.ti.com SNAS080K – JULY 1999 – REVISED MARCH 2013 Top View Top View Figure 3. 24-Pin Wide Body Figure 4. 28-Pin Wide Body SOIC, PDIP, SSOP Packages SOIC Package See Package Numbers DW0024B, NAM0024D, See Package Number DW0028B DB0024A PIN DESCRIPTIONS Pin Name Pin Description Analog Inputs to the MUX (multiplexer). A channel input is selected by the address information at the DI pin, which is loaded on the rising edge of SCLK into the address register (See Table 2, Table 3, and Table 4). The voltage CH0 thru CH7 applied to these inputs should not exceed VA+ or go below VA- or below GND. Exceeding this range on an unselected channel may corrupt the reading of a selected channel. COM Analog input pin that is used as a pseudo ground when the analog multiplexer is single-ended. MUXOUT1 Multiplexer Output pins. If the multiplexer is used, these pins should be connected to the A/DIN pins, directly or MUXOUT2 through an amplifier and/of filter. Converter Input pins. MUXOUT1 is usually tied to A/DIN1. MUXOUT2 is usually tied to A/DIN2. If external circuitry A/DIN1 is placed between MUXOUT1 and A/DIN1, or MUXOUT2 and A/DIN2, it may be necessary to protect these pins A/DIN2 against voltage overload.. The voltage at these pins should not exceed VA + or go below AGND (see Figure 60). Data Output pin. This pin is an active push/pull output when CS is low. When CS is high, this output is TRI-STATE. The conversion result (D0–D12) and converter status data are clocked out by the falling edge of SCLK on this pin. DO The word length and format of this result can vary (see Table 1). The word length and format are controlled by the data shifted into the multiplexer address and mode select register (see Table 5). Serial Data input pin. The data applied to this pin is shifted by the rising edge of SCLK into the multiplexer address DI and mode select register. Table 2 through Table 5 show the assignment of the multiplexer address and the mode select data. This pin is an active push/pull output which indicates the status of the ADC12030/2/4/8. A logic low on this pin EOC indicates that the ADC is busy with a conversion, Auto Calibration, Auto Zero or power down cycle. The rising edge of EOC signals the end of one of these cycles. A logic low is required at this pin to program any mode or to change the ADC's configuration as listed in Mode Programming Table 5. When this pin is high, the ADC is placed in the read data only mode. While in the read data only mode, bringing CS low and pulsing SCLK will only clock out the data stored in the ADCs output shift register. CONV The data on DI will be neglected. A new conversion will not be started and the ADC will remain in the mode and/or configuration previously programmed. Read data only cannot be performed while a conversion, Auto Cal or Auto Zero are in progress. Copyright © 1999–2013, Texas Instruments Incorporated Submit Documentation Feedback 3 Product Folder Links: ADC12030 ADC12032 ADC12034 ADC12038 ADC12H030 ADC12H032 ADC12H034 ADC12H038 |
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