 |
Electronic Components Datasheet Search |
|
|
Electronic Components Datasheet Search |
|
AD7674 Datasheet(PDF) 11 Page - Analog Devices |
|
||||||||||||||||||||||||||||||
AD7674 Datasheet(HTML) 11 Page - Analog Devices |
|
|
11 / 20 page  REV. B AD7676 –11– TYPICAL CONNECTION DIAGRAM Figure 5 shows a typical connection diagram for the AD7676. Different circuitry shown on this diagram is optional and is discussed below. Analog Inputs The AD7676 is specified to operate with a differential ±2.5 V range. The typical input impedance for each analog input range is also shown. Figure 6 shows a simplified analog input section of the AD7676. IN+ IN– AGND AVDD R+ = 684 CS CS R– = 684 Figure 6. Simplified Analog Input The diodes shown in Figure 6 provide ESD protection for the inputs. Care must be taken to ensure that the analog input signal never exceeds the absolute ratings on these inputs. This will cause these diodes to become forward-biased and start conducting current. These diodes can handle a forward-biased current of 120 mA maximum. This condition could eventually occur when the input buffer’s (U1) or (U2) supplies are different from AVDD. In such a case, an input buffer with a short-circuit current limitation can be used to protect the part. This analog input structure is a true differential structure. By using these differential inputs, signals common to both inputs are rejected as shown in Figure 7, which represents the typical CMRR over frequency. FREQUENCY – Hz 45 75 10k 10M 1k 1M 80 65 100k 55 85 70 60 50 40 Figure 7. Analog Input CMRR vs. Frequency AVDD AGND DGND DVDD OVDD OGND SER/ PAR CNVST BUSY SDOUT SCLK RD CS RESET PD REFGND CREF 2.5V REF NOTE 1 REF 100 D CLOCK AD7676 C/ P/DSP SERIAL PORT DIGITAL SUPPLY (3.3V OR 5V) ANALOG SUPPLY (5V) DVDD OB/ 2C NOTE 7 BYTESWAP DVDD 50k 100nF 1M IN+ ANALOG INPUT+ CC 2.7nF U1 NOTE 4 NOTE 5 50 AD8021 – + 15 NOTE 2 NOTE 3 NOTE 6 ADR421 10 F 100nF + 10 F 100nF + 100nF + 10 F IN– ANALOG INPUT– CC 2.7nF U2 NOTE 4 NOTE 5 50 AD8021 – + 15 50 + 1 F NOTES 1. SEE VOLTAGE REFERENCE INPUT SECTION. 2. WITH THE RECOMMENDED VOLTAGE REFERENCES, CREF IS 47 F. SEE VOLTAGE REFERENCE INPUT SECTION. 3. OPTIONAL CIRCUITRY FOR HARDWARE GAIN CALIBRATION. 4. THE AD8021 IS RECOMMENDED. SEE DRIVER AMPLIFIER CHOICE SECTION. 5. SEE ANALOG INPUTS SECTION. 6. OPTION, SEE POWER SUPPLY SECTION. 7. OPTIONAL LOW JITTER CNVST, SEE CONVERSION CONTROL SECTION. Figure 5. Typical Connection Diagram ( ±2.5 V Range Shown) |
Similar Part No. - AD7674 |
|
|
|
Link URL |
| Privacy Policy |
| ALLDATASHEET.COM |
| Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Datasheet Upload | Contact us | Privacy Policy | Link Exchange | Manufacturer List 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 |
English ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
