 |
Electronic Components Datasheet Search |
|
|
Electronic Components Datasheet Search |
|
OPA361AIDCKR Datasheet(PDF) 8 Page - Texas Instruments |
|
|
||||||||||||||||||||||||||||||
OPA361AIDCKR Datasheet(HTML) 8 Page - Texas Instruments |
|
|
8 / 17 page  OPA361 SBOS334A − SEPTEMBER 2005 − REVISED JANUARY 2006 www.ti.com 8 OPERATING VOLTAGE The OPA361 is fully specified from 2.5V to 3.3V over a temperature range of −40 _C to +125_C. Parameters that vary significantly with operating voltages or temperature are shown in the Typical Characteristics. Power-supply pins should be bypassed with 100nF ceramic capacitors. INPUT VOLTAGE The input common-mode range of the OPA361 series extends from GND to 0.55V on a 3.3V supply. The input range is limited by the internal gain in conjunction with the maximum output swing capability and the power-supply voltage. INPUT OVERVOLTAGE PROTECTION All OPA361 pins are static-protected with internal ESD protection diodes connected to the supplies. These diodes will provide input overdrive protection if the current is externally limited to 10mA. ENABLE/SHUTDOWN The OPA361 has a shutdown feature that disables the output and reduces the quiescent current to less than 1.5 µA. This feature is especially useful for portable video applications, where the device is infrequently connected to a television (TV) or other video device. The Enable logic input voltage is referenced to the OPA361 GND pin. A logic level HIGH applied to the enable pin enables the op amp. The logic levels are compatible with 1.8V CMOS logic levels. A valid logic HIGH is defined as > 1.3V above GND. A valid logic LOW is defined as < 0.35V above GND. If the Enable pin is not connected, internal pull-up circuitry will enable the amplifier. When disabling the OPA361, internal circuitry also disconnects the internal gain setting feedback. This feature is in support of the TV-detection function. See the TV-Detect Function section for more detailed information. INTERNAL 2-POLE FILTER The OPA361 filter is a Sallen-Key topology with a 9MHz cutoff frequency. Figure 2 shows a detailed drawing of the filter components. This filter allows video signals to pass without any visible distortion, as shown in Figure 3 through Figure 6. The video encoder embedded in the OMAP242x processor typically samples at 54MHz. At this frequency, the attenuation is typically 23dB, which effectively attenuates the sampling aliases. The internal 500 Ω resistor on the input to GND converts the output current of the OMAP2420 internal video DAC into a voltage. It is also part of the Sallen-Key filter. Using an external resistor to adjust the input voltage range will also alter the filter characteristics. 12.5pF 1k Ω 4.22k Ω 2.2k Ω 2.2k Ω V O OPA361 () 3.6pF 500 Ω 75 Ω 75 Ω Television Figure 2. Filter Structure of the OPA361 |
Similar Part No. - OPA361AIDCKR |
|
Similar Description - OPA361AIDCKR |
|
|
|
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
