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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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TLC3574 датащи(PDF) 4 Page - Texas Instruments |
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TLC3574 датащи(HTML) 4 Page - Texas Instruments |
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4 / 50 page  TLC3574, TLC3578, TLC2574, TLC2578 5V ANALOG, 3/5V DIGITAL, 14/12BIT, 200KSPS, 4/8CHANNEL SERIAL ANALOGTODIGITAL CONVERTERS WITH ±10V INPUTS SLAS262C − OCTOBER 2000 − REVISED MAY 2003 4 WWW.TI.COM Terminal Functions (Continued) TERMINAL NO. I/O DESCRIPTION NAME TLC3574 TLC2574 TLC3578 TLC2578 I/O DESCRIPTION EOC(INT) 4 4 O End of conversion (EOC) or interrupt to host processor (INT) EOC: used in conversion mode 00 only. EOC goes from high to low at the end of the sampling and remains low until the conversion is complete and data is ready. INT: Interrupt to the host processor. The falling edge of INT indicates data is ready for output. INT is cleared by the following CS ↓, FS↑, or CSTART↓. FS 2 2 I Frame sync input from DSP. The rising edge of FS indicates the start of a serial data frame being transferred (coming into or being sent out of the device). If FS is low at the falling edge of CS, the rising edge of FS initiates the operation cycle, resets the internal 4-bit counter, and enables SDI, SDO, and SCLK. Tie this pin to DVDD if FS is not used to initiate the operation cycle. REFM 16 20 I External low reference input. Connect REFM to AGND. REFP 15 19 I External positive reference input. The range of maximum input voltage is determined by the difference between the voltage applied to this terminal and to the REFM terminal. Always install decoupling capacitors (10 µF in parallel with 0.1 µF) between REFP and REFM. SCLK 1 1 I Serial clock input from the host processor to clock in the input from SDI and clock out the output via SDO. It can also be used as the conversion clock source when the external conversion clock is selected (see Table 2). When CS is low, SCLK is enabled. When CS is high, SCLK is disabled for the data transfer, but can still work as the conversion clock source. SDI 3 3 I Serial data input. The first 4 MSBs, ID[15:12], are decoded as one 4-bit command. All trailing bits, except for the WRITE CFR command, are filled with zeros. The WRITE CFR command requires additional 12-bit data. The MSB of input data, ID(15), is latched at the first falling edge of SCLK following FS falling edge if FS starts the operation, or latched at the falling edge of first SCLK following CS falling edge when CS initiates the operation. The remaining input data (if any) is shifted in on the rising edge of SCLK and latched on the falling edge of SCLK. The input via SDI is ignored after the 4-bit counter counts to 16 (clock edges) or a low-to-high transition of CS, whichever happens first. Refer to the timing specification for the timing requirements. Tie SDI to DVDD if using hardware default mode (refer to Device Initialization). SDO 5 5 O The 3-state serial output for the A/D conversion result. All data bits are shifted out through SDO. SDO is in the high-impedance state when CS is high. SDO is released after a CS falling edge. The output format is MSB (OD15) first. When FS initiates the operation, the MSB of output via SDO, OD(15), is valid before the first falling edge of SCLK following the falling edge of FS. When CS initiates the operation, the MSB, OD(15), is valid before the first falling edge of SCLK following the CS falling edge. The remaining data bits (if any) are shifted out on the rising edge of SCLK and are valid before the falling edge of SCLK. Refer to the timing specification for the details. In select/conversion operation, the first 14 bits (for TLC3574/78) or the first 12 bits (for TLC2574/78) are the results from the previous conversion (data). In a READ FIFO operation, this data is from FIFO. In both cases, the last two bits (for TLC3574/78) or the last four bits (for TLC2574/78) are don’t care. In a WRITE operation, the output from SDO must be ignored. SDO goes into high-impedance state at the 16th falling edge of SCLK after the operation cycle is initiated. SDO is in high-impedance state during conversions in modes 01, 10, and 11. |
Аналогичный номер детали - TLC3574_14 |
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Аналогичное описание - TLC3574_14 |
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