Motore di ricerca datesheet componenti elettronici |
|
DM2502J Scheda tecnica(PDF) 4 Page - National Semiconductor (TI) |
|
|
DM2502J Scheda tecnica(HTML) 4 Page - National Semiconductor (TI) |
4 / 8 page Application Information (Continued) SHORT CYCLE If all bits are not required the register may be truncated and conversion time saved by using a register output going low rather then the QCC signal to indicate the end of conversion If the register is truncated and operated in the continuous conversion mode a lock-up condition may occur on power turn-on This condition can be avoided by making the start input the OR function of QCC and the appropriate register output COMPARATOR BIAS To minimize the digital error below g LSB the compara- tor must be biased If a DA converter is used which re- quires a low voltage level to turn on the comparator should be biased a LSB If the DA converter requires a high logic level to turn on the comparator must be biased b LSB Definition of Terms CP The clock input of the register D The serial data input of the register DO The serial data out (The D input delayed one bit) E The register enable This input is used to expand the length of the register and when high forces the Q7 (11) register output high and inhibits conversion When not used for expansion the enable is held at a low logic level (ground) Qi ie7 (11) to 0 The outputs of the register QCC The conversion complete output This output remains high during a conversion and goes low when a conversion is complete Q7 (11) The true output of the MSB of the register Q7 (11) The complement output of the MSB of the register S The start input If the start input is held low for at least a clock period the register will be reset to Q7 (11) low and all the remaining outputs high A start pulse that is low for a shorter period of time can be used if it meets the set-up time requirements of the S input Truth Table DM2502 DM2503 Time Inputs Outputs1 tn DS E2 D03 Q7 Q6 Q5 Q4 Q3 Q2 Q1 Q0 QCC 0 X L L X X XXXXXXX X 1 D7 H L X L HHHHHHH H 2 D6 H L D7 D7 L HHHHHH H 3 D5 H L D6 D7 D6 L HHHHH H 4 D4 H L D5 D7 D6 D5 L HHHH H 5 D3 H L D4 D7 D6D5D4 L H H H H 6 D2 H L D3 D7 D6D5D4D3 L H H H 7 D1 H L D2 D7 D6D5D4D3D2 L H H 8 D0 H L D1 D7 D6D5D4D3D2D1 L H 9 X H L D0 D7 D6 D5 D4 D3 D2 D1 D0 L 10 X X L X D7 D6 D5 D4 D3 D2 D1 D0 L X X H X H NCNCNCNCNCNCNC NC H e High Voltage Level Note 1 Truth table for DM2504 is extended to include 12 outputs L e Low Voltage Level Note 2 Truth table for DM2502 does not include E column or last line in truth table shown X e Don’t Care Note 3 Truth table for DM2503 does not include D0 column NC e No Change Typical Applications BCD Illegal Code Suppression Active High Active Low TLF5702 – 3 4 |
Codice articolo simile - DM2502J |
|
Descrizione simile - DM2502J |
|
|
Link URL |
Privacy Policy |
ALLDATASHEETIT.COM |
Lei ha avuto il aiuto da alldatasheet? [ DONATE ] |
Di alldatasheet | Richest di pubblicita | contatti | Privacy Policy | scambio Link | Ricerca produttore 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 |