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THS3115ID Datasheet(PDF) 11 Page - Texas Instruments |
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THS3115ID Datasheet(HTML) 11 Page - Texas Instruments |
11 / 35 page THS3115 750 W 49.9 W 53.6 R W M R G 750 W 0.1 F m + 6.8 F m 0.1 F m + 6.8 F m 50- Load W 50- Source W R F V I +V S -V S -15V +15V THS3115 750 W 49.9 W 49.9 W 750 R W G 0.1 F m + 6.8 F m 0.1 F m + 6.8 F m 50- Load W 50- Source W R F V I +V S -V S -15V +15V THS3112 THS3115 www.ti.com SLOS385C – SEPTEMBER 2001 – REVISED SEPTEMBER 2010 APPLICATION INFORMATION Current-feedback amplifiers are highly dependent on Maximum Slew Rate for Repetitive Signals the feedback resistor RF for maximum performance The THS3115 and THS3112 are recommended for and stability. Table 1 shows the optimal gain setting high slew rate pulsed applications where the internal resistors RF and RG at different gains to give nodes of the amplifier have time to stabilize between maximum bandwidth with minimal peaking in the pulses. It is recommended to have at least a 20-ns frequency response. Higher bandwidths can be delay between pulses. achieved, at the expense of added peaking in the frequency response, by using even lower values for The THS3115 and THS3112 are not recommended RF. Conversely, increasing RF decreases the for applications with repetitive signals (sine, square, bandwidth, but stability is improved. sawtooth, or other) that exceed 900 V/µs. Using the part in these applications results in excessive current Table 1. Recommended Resistor Values for draw from the power supply and possible device Optimum Frequency Response damage. THS3115 and THS3112 RF and RG VALUES FOR MINIMAL For applications with high slew rate, repetitive signals, PEAKING WITH RL = 50 Ω, ±5-V to ±15-V POWER SUPPLY the THS3091 and THS3095 (single versions), or GAIN (V/V) RG (Ω) RF (Ω) THS3092 and THS3096 (dual versions) are 1 — 1 k recommended. 2 750 750 4 187 560 Wideband, Noninverting Operation 8 28.7 200 The THS3115 and THS3112 are unity gain stable –1 750 750 100-MHz current-feedback operational amplifiers, designed to operate from a ±5-V to ±15-V power –4 140 560 supply. –8 53.6 430 Figure 39 shows the THS3115 in a noninverting gain of 2-V/V configuration used to generate the typical Wideband, Inverting Operation characteristic curves. Most of the curves were Figure 40 shows the THS3115 in a typical inverting characterized using signal sources with 50- Ω source gain configuration designed for 50- Ω input/output. impedance and with measurement equipment that presents a 50- Ω load impedance. Figure 40. Wideband, Inverting Gain Configuration Figure 39. Wideband, Noninverting Gain Configuration Copyright © 2001–2010, Texas Instruments Incorporated Submit Documentation Feedback 11 Product Folder Link(s): THS3112 THS3115 |
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