THS3096PWPR datasheet(16/34 Pages) TI

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APPLICATION INFORMATION

WIDEBAND, NONINVERTING OPERATION

909

Ω

49.9

Ω

0.1

µF

6.8

µF

−VS

−15 V

Ω Source

0.1

µF

6.8

µF

+VS

15 V

909

Ω

49.9

Ω

Ω LOAD

THS3092

THS3096

SLOS428A – DECEMBER 2003 – REVISED FEBRUARY 2004

Current-feedback amplifiers are highly dependent on

the feedback resistor RF for maximum performance

The THS3092/6 are unity gain stable 135-MHz

and stability. Table 1 shows the optimal gain setting

current-feedback operational amplifiers, designed to

resistors RF and RG at different gains to give

operate from a

±5-V to ±15-V power supply.

maximum bandwidth with minimal peaking in the

Figure 52 shows the THS3092 in a noninverting gain

frequency response. Higher bandwidths can be

of 2-V/V configuration typically used to generate the

achieved, at the expense of added peaking in the

performance

curves.

Most

the

curves

were

frequency response, by using even lower values for

characterized using signal sources with 50-

Ω source

RF.

Conversely,

increasing

decreases

the

impedance,

and

with

measurement

equipment

bandwidth, but stability is improved.

presenting a 50-

Ω load impedance.

Table 1. Recommended Resistor Values for

Optimum Frequency Response

THS3092 and THS3096 RF and RG values for minimal peaking

with RL = 100 Ω

SUPPLY VOLTAGE

GAIN (V/V)

RG (Ω)

RF (Ω)

(V)

±15

1.1 k

±5

1.1 k

±15

909

±5

909

±15

178

715

±5

178

715

±15

66.5

604

±5

66.5

604

-1

±15 and ±5

909

Figure 52. Wideband, Noninverting Gain

-2

±15 and ±5

402

806

Configuration

-5

±15 and ±5

143

715

-10

±15 and ±5

60.4

604

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