전자부품 데이터시트 검색엔진 |
|
TC818ACBU 데이터시트(PDF) 6 Page - Microchip Technology |
|
TC818ACBU 데이터시트(HTML) 6 Page - Microchip Technology |
6 / 24 page TC818A DS21475B-page 6 © 2002 Microchip Technology Inc. 3.0 DETAILED DESCRIPTION 3.1 Analog-to-Digital Converter (ADC) The TC818A includes an integrating ADC with auto- ranging resolution of 2000 counts and manual range resolution of 3000 counts. Figure 3-1 shows a simpli- fied schematic of the analog section. In Auto-Ranging mode, internal logic will adjust the input voltage or ohms attenuators so that measurements will always be made in the appropriate range. Measurement ranges, logic control inputs, 3-1/2 digit LCD formatting, and other features are identical to the TC818A auto-ranging A/D converter. However, the TC818A is not pin compatible with, and is not a replace- ment for, the TC818A. A display annunciator output (ANNUNC) can be used to customize the LCD. ANNUNC is a square wave at the backplane frequency. Connecting an annunciator segment to the ANNUNC driver turns the segment on; connecting the segment to its backplane turns it off. 37 ΩR3 Standard resistor connection for 20k Ω full scale range. 38 ΩR4 Standard resistor connection for 200k Ω full scale range. 39 ΩR5 Standard resistor connection for 2000k Ω full scale. 40 VR3 Voltage measurement ÷ 100 attenuator. 41 VR2 Voltage measurement ÷ 10 attenuator. 42 VR5 Voltage measurement ÷ 10,000 attenuator. 43 VR4 Voltage measurement ÷ 1000 attenuator. 44 VI Unknown voltage input ÷ attenuator. 45 II Unknown current input. 46 ACVL Low output of AC-to-DC converter. 47 CI Integrator capacitor connection. Nominally 0.1 µF. (Must have low dielectric absorption. Polypropylene dielectric suggested.) 48 NC No connection. 49 CAZ Auto-zero capacitor connection. Nominally 0.1 µF. 50 RX Unknown resistance input. 51 CFI Input filter connection. 52 ADI Negative input of internal AC-to-DC operational amplifier. 53 ADO Output of internal AC-to-DC operational amplifier. 54 R ΩBUF Active buffer output for resistance measurement. Integration resistor connection. Nominally 220k Ω. 55 RVIBUF Active buffer output for voltage and current measurement. Integration resistor connection. Nominally 15k Ω. 56 ACVH Positive output of AC-to-DC converter. 57 VSS Negative supply connection. Connect to negative terminal of 9V battery. 58 DGND Internal logic digital ground. Ground connection for the logic "0" level. Nominally 4.7V below VCC. 59 RANGE Input to set manual operation and change ranges. 60 HOLD Input to hold display. Connect to DGND to "FREEZE" display. 61 -MEM Input to enter Memory Measurement mode for relative measurements. The two LSDs are stored and subtracted from future measurements. 62 DC( Ω)/ AC(LO Ω) Input that selects AC or DC option during voltage/current measurements. For resistance measurements, the ohms or low power (voltage) ohms option can be selected. 63 I Input to select measurement. Connect to logic "0" (digital ground) for current measurement. 64 NC No connection. TABLE 2-1: PIN FUNCTION TABLE (CONTINUED) Pin Number (64-Pin PQFP) Symbol Description |
유사한 부품 번호 - TC818ACBU |
|
유사한 설명 - TC818ACBU |
|
|
링크 URL |
개인정보취급방침 |
ALLDATASHEET.CO.KR |
ALLDATASHEET 가 귀하에 도움이 되셨나요? [ DONATE ] |
Alldatasheet는? | 광고문의 | 운영자에게 연락하기 | 개인정보취급방침 | 링크교환 | 제조사별 검색 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 |