 |
Electronic Components Datasheet Search |
|
|
Electronic Components Datasheet Search |
|
OPA2338 Datasheet(PDF) 8 Page - Texas Instruments |
|
|
||||||||||||||||||||||||||||||
OPA2338 Datasheet(HTML) 8 Page - Texas Instruments |
|
|
8 / 25 page  OPA337, OPA2337 OPA338, OPA2338 SBOS077B − JUNE 1997 − REVISED MARCH 2005 www.ti.com 8 APPLICATIONS INFORMATION The OPA337 and OPA338 series are fabricated on a state-of-the-art CMOS process. The OPA337 series is unity-gain stable. The OPA338 series is optimized for gains greater than or equal to 5. Both are suitable for a wide range of general-purpose applications. Power- supply pins should be bypassed with 0.01 µF ceramic capacitors. OPERATING VOLTAGE The OPA337 series and OPA338 series can operate from a +2.5V to +5.5V single supply with excellent performance. Unlike most op amps which are specified at only one supply voltage, these op amps are specified for real-world applications; a single limit applies throughout the +2.7V to +5.5V supply range. This allows a designer to have the same assured performance at any supply voltage within the specified voltage range. Most behavior remains unchanged throughout the full operating voltage range. Parameters which vary significantly with operating voltage are shown in the Typical Characteristic curves. INPUT VOLTAGE The input common-mode range extends from (V−) − 0.2V to (V+) − 1.2V. For normal operation, inputs should be limited to this range. The absolute maximum input voltage is 500mV beyond the supplies. Inputs greater than the input common-mode range but less than maximum input voltage, while not valid, will not cause any damage to the op amp. Furthermore, if input current is limited the inputs may go beyond the power supplies without phase inversion (as shown in Figure 1) unlike some other op amps. OPA337, V IN = ± 3V Greater Than VS = ±2.5V 3V 0V −3V G= ±1 V OUT,G = +1 (limited by input common−mode range) V OUT,G = −1 (not limited by input common− mode range) Figure 1. OPA337—No Phase Inversion with Inputs Greater than the Power-Supply Voltage Normally, input currents are 0.2pA. However, large inputs (greater than 500mV beyond the supply rails) can cause excessive current to flow in or out of the input pins. Therefore, as well as keeping the input voltage below the maximum rating, it is also important to limit the input current to less than 10mA. This is easily accomplished with an input resistor as shown in Figure 2. 5k Ω OPA337 10mA max +5V V IN V OUT I OVERLOAD Figure 2. Input Current Protection for Voltages Exceeding the Supply Voltage USING THE OPA338 IN LOW GAINS The OPA338 series is optimized for gains greater than or equal to 5. It has significantly wider bandwidth (12.5MHz) and faster slew rate (4.6V/ µs) when compared to the OPA337 series. The OPA338 series can be used in lower gain configurations at low frequencies while maintaining its high slew rate with the proper compensation. Figure 3 shows the OPA338 in a unity-gain buffer configuration. At dc, the compensation capacitor C1 is effectively open resulting in 100% feedback (closed-loop gain = 1). As frequency increases, C1 becomes lower impedance and closed-loop gain increases, eventually becoming 1 + R2/R1 (in this case 5, which is equal to the minimum gain required for stability). C 1 = 1 2 πf CR1 R 1 2.5k Ω C 1 68pF R2 10k Ω OPA338 V IN V OUT Where f C is the frequency at which closed−loop gains less than 5 are not appropriate see text. Improved slew rate (4.6V/ µs) versus OPA337 (1.2V/ µs) in unity gain. Figure 3. Compensation of the OPA338 for Unity-Gain Buffer |
Similar Part No. - OPA2338 |
|
|
|
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
