поискавой системы для электроныых деталей |
|
TC850CLW датащи(PDF) 9 Page - TelCom Semiconductor, Inc |
|
TC850CLW датащи(HTML) 9 Page - TelCom Semiconductor, Inc |
9 / 14 page 3-85 TELCOM SEMICONDUCTOR, INC. 7 6 5 4 3 1 2 8 Digital Operating Modes Two modes of operation are available with the TC850, continuous conversions and on-demand. The operating mode is controlled by the CONT/DEMAND input. The bus interface method is different for continuous and demand modes of operation. Demand Mode Operation When CONT/DEMAND is low, the TC850 performs one conversion each time the chip is selected and the WR input is pulsed low. Data is valid on the falling edge of the BUSY output and can be accessed using the interface truth table (Table 1). Continuous Mode Operation When CONT/DEMAND is high, the TC850 continuously performs conversions. Data will be valid on the falling edge of the BUSY output, and remains valid for 443-1/2 clock cycles. The low/high (L/H) byte-select and overrange/polarity (OVR/POL) inputs are disabled during continuous mode operation. Data must be read in three consecutive bytes, as shown in Table I. NOTE: In continuous mode, the conversion result must be read within 443- 1/2 clock cycles of the BUSY output falling edge. After this time (i.e., 1/2 clock cycle before BUSY goes high) the internal counters are reset and the data is lost. Table 1. Bus Interface Truth Table CE•CS RD CONT/DEMAND L/H OVR/POL DB7 DB6–DB0 Pins 1 and 2 Pin 4 Pin 5 Pin 7 Pin 6 Pin 8 Pin 9-Pin 15 (Note 1) 0 0 0 0 0 "1" = Input Positive Data Bits 14 – 8 0 0 0 0 1 "1" = Input Overrange Data Bits 14 – 8 (Note 2) 0 0 0 1 X Data Bit 7 Data Bits 6 – 0 0 0 1 X X Note 3 0 1 X X X High-Impedance State 1 X X X X High-Impedance State NOTES: 1. Pin numbers refer to 40-pin DIP. 2. Extended overrange operation: Although rated at 15 bits ( ±32,767 counts) of resolution, the TC850 provides an additional 191 counts above full scale. For example, with a full-scale input of 3.2768V, the maximum analog input voltage which will be properly converted is 3.2958V. The extended resolution is signified by the overrange bit being high and the low-order byte contents being between 0 and 190. For example, with a full-scale voltage of 3.2768V: VIN Overrange Bit Low Byte Data Bits 14–8 3.2767V Low 25510 12710 3.2768V High 00010 010 3.2769V High 00110 010 3.2867V High 09910 010 3. Continuous mode data transfer: a. In continuous mode, data MUST be read in three sequential bytes after the BUSY output goes low: (1) The first byte read will be the high-order byte, with DB7 = polarity. (2) The second byte read will contain the low-order byte. (3) The third byte read will again be the high-order byte, but with DB7 = overrange. b. All three data bytes must be read within 443-1/2 clock cycles after the falling edge of BUSY. c. The RD input must go high after each byte is read, so that the internal byte counter will be incremented. However, the CS and CE inputs can remain enabled through the entire data transfer sequence. TC850 15-BIT, FAST-INTEGRATING CMOS ANALOG-TO-DIGITAL CONVERTER |
Аналогичный номер детали - TC850CLW |
|
Аналогичное описание - TC850CLW |
|
|
ссылки URL |
Конфиденциальность |
ALLDATASHEETRU.COM |
Вашему бизинису помогли Аллдатащит? [ DONATE ] |
Что такое Аллдатащит | реклама | контакт | Конфиденциальность | обмен ссыками | поиск по производителю All Rights Reserved©Alldatasheet.com |
Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
Family Site : ic2ic.com |
icmetro.com |