 |
поискавой системы для электроныых деталей |
|
|
поискавой системы для электроныых деталей |
|
TC7126 датащи(PDF) 11 Page - Microchip Technology |
|
||||||||||||||||||||||||||||||
TC7126 датащи(HTML) 11 Page - Microchip Technology |
|
|
11 / 26 page  © 2006 Microchip Technology Inc. DS21458C-page 11 TC7126/A 5.0 DIGITAL SECTION The TC7126A contains all the segment drivers neces- sary to directly drive a 3-1/2 digit LCD, including an LCD backplane driver. The backplane frequency is the external clock frequency divided by 800. For 3 conver- sions per second, the backplane frequency is 60Hz with a 5V nominal amplitude. When a segment driver is in phase with the backplane signal, the segment is OFF. An out of phase segment drive signal causes the segment to be ON (visible). This AC drive configuration results in negligible DC voltage across each LCD seg- ment, ensuring long LCD life. The polarity segment driver is ON for negative analog inputs. If VIN+ and VIN- are reversed, this indicator reverses. On the TC7126A, when the TEST pin is pulled to V+, all segments are turned ON and the display reads - 1888 . During this mode, LCD segments have a constant DC voltage impressed. The display font and segment drive assignment are shown in Figure 5-1. FIGURE 5-1: Display Font and Segment Assignment 5.1 System Timing The oscillator frequency is divided by four prior to clocking the internal decade counters. The four-phase measurement cycle takes a total of 4000 counts (16,000 clock pulses). The 4000-count cycle is independent of input signal magnitude. Each phase of the measurement cycle has the following length: 1. Auto-Zero Phase: 1000 to 3000 counts (4000 to 12,000 clock pulses). For signals less than full scale, the auto-zero phase is assigned the unused reference integrate time period. 2. Signal Integrate: 1000 counts (4000 clock pulses). This time period is fixed. The integration period is: EQUATION 5-1: 3. Reference Integrate: 0 to 2000 counts (0 to 8000 clock pulses). The TC7126A is a drop-in replacement for the TC7126 and ICL7126, which offer a greatly improved internal reference temperature coefficient. No external component value changes are required to upgrade existing designs. Note: Do not leave the display in this mode for more than several minutes. LCDs may be destroyed if operated with DC levels for extended periods. Display Font 1000's 100's 10's 1's TSI = 4000 1 FOSC Where: FOSC is the externally set clock frequency. |
Аналогичный номер детали - TC7126_06 |
|
Аналогичное описание - TC7126_06 |
|
|
|
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 |
Russian ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
