 |
Electronic Components Datasheet Search |
|
|
Electronic Components Datasheet Search |
|
INA821 Datasheet(PDF) 27 Page - Texas Instruments |
|
|
|
|||||||||||||||||||||||||||||
INA821 Datasheet(HTML) 27 Page - Texas Instruments |
|
|
27 / 43 page  +IN ±IN RG INA821 5 V OPA191 100 k 5 V 1 F 5 V 100 k OUT Copyright © 2017, Texas Instruments Incorporated RG RG 0 20 40 60 80 100 120 10 100 1k 10k 0 Ω 10 Ω 5 Ω 15 Ω 20 Ω Frequency (Hz) 27 INA821 www.ti.com SBOS893B – AUGUST 2018 – REVISED MAY 2019 Product Folder Links: INA821 Submit Documentation Feedback Copyright © 2018–2019, Texas Instruments Incorporated Application Information (continued) The parasitic resistance at the reference pin (RREF) creates an imbalance in the four resistors of the internal difference amplifier that results in a degraded common-mode rejection ratio (CMRR). Figure 66 shows the degradation in CMRR of the INA821 as a result of the increased resistance at the reference pin. For the best performance, keep the source impedance to the REF pin (RREF) less than 5 Ω. Figure 66. The Effect of Increasing Resistance at the Reference Pin Voltage reference devices are an excellent option for providing a low-impedance voltage source for the reference pin. However, if a resistor voltage divider generates a reference voltage, the divider must be buffered by an op amp, as Figure 67 shows, to avoid CMRR degradation. Figure 67. Using an Op Amp to Buffer Reference Voltages |
|
Link URL |
| Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Contact us | Privacy Policy | Link to Datasheet | 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
