データシートサーチシステム |
|
OP162DRU データシート(PDF) 11 Page - Analog Devices |
|
OP162DRU データシート(HTML) 11 Page - Analog Devices |
11 / 16 page –11– REV. D OP162/OP262/OP462 10 0% 100 90 500ns 2V 50mV VS = 5V AV = 1 RL = 10k Figure 32. Oscilloscope Photo of VS and VOUT OP462 VOUT 10k +1 + – 0 TO +5V SQUARE Figure 33. Test Circuit for Power On Settling Time Capacitive Load Drive The OP162/OP262/OP462 is a high speed, extremely accurate device and can tolerate some capacitive loading at its output. As load capacitance increases, however, the unity-gain band- width of the device will decrease. There will also be an increase in overshoot and settling time for the output. Figure 35 shows an example of this with the device configured for unity gain and driving a 10 k W resistor and 300 pF capacitor placed in parallel. By connecting a series R-C network, commonly called a “snub- ber” network, from the output of the device to ground, this ringing can be eliminated and overshoot can be significantly reduced. Figure 34 shows how to set up the snubber network, and Figure 36 shows the improvement in output response with the network added. OPx62 VIN VOUT +5V RX CX CL Figure 34. Snubber Network Compensation for Capacitive Loads 50mV VS = 5V AV = 1 CL = 300pF RL = 10k 1 s 100 90 10 0% Figure 35. A Photo of a Ringing Square Wave 10 0% 100 90 50mV 1 s VS = 5V AV = 1 CL = 300pF RL = 10k WITH SNUBBER: RX = 140 CX = 10nF Figure 36. A Photo of a Nice Square Wave at the Output The network operates in parallel with the load capacitor, CL, and provides compensation for the added phase lag. The actual values of the network resistor and capacitor are determined empirically to minimize overshoot while maximizing unity-gain bandwidth. Table I shows a few sample snubber networks for large load capacitors: Table I. Snubber Networks for Large Capacitive Loads CLOAD RX CX <300 pF 140 W 10 nF 500 pF 100 W 10 nF 1 nF 80 W 10 nF 10 nF 10 W 47 nF Obviously, higher load capacitance will also reduce the unity- gain bandwidth of the device. Figure 37 shows a plot of unity- gain bandwidth versus capacitive load. The snubber network will not provide any increase in bandwidth, but it will substan- tially reduce ringing and overshoot, as shown in the difference between Figures 35 and 36. CLOAD 10 9 0 10pF 10nF 100pF 1nF 4 3 2 1 6 5 8 7 Figure 37. Unity Gain Bandwidth vs. CLOAD Total Harmonic Distortion and Crosstalk The OPx62 device family offers low total harmonic distortion. This makes it an excellent device choice for audio applications. Figure 38 shows a graph of THD plus noise figures at 0.001% for the OP462. Figure 39 shows a graph of the worst case crosstalk between two amplifiers in the OP462 device. A 1 V rms signal is applied to one amplifier while measuring the output of an adjacent ampli- fier. Both amplifiers are configured for unity gain and supplied with ±2.5 V. |
同様の部品番号 - OP162DRU |
|
同様の説明 - OP162DRU |
|
|
リンク URL |
プライバシーポリシー |
ALLDATASHEET.JP |
ALLDATASHEETはお客様のビジネスに役立ちますか? [ DONATE ] |
Alldatasheetは | 広告 | お問い合わせ | プライバシーポリシー | リンク交換 | メーカーリスト 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 |