THS4524MDBTREP datasheet(29/48 Pages) NSC

29 / 48 page

0.1

100

1000

Frequency (MHz)

SMALL-SIGNAL FREQUENCY RESPONSE

Gain = 1, R = R = R = 1 k , 10 k , 100 k

1 kW

10 kW

100 kW

= 5.0 V

V = 100 mV

Gain = 1 V/V

S+

0.1

100

1000

Frequency (MHz)

SMALL-SIGNAL FREQUENCY RESPONSE

Device and Package Option Comparison

= 5.0 V

Gain = 1 V/V

S+

R = 1 k

THS4522,

THS4524

THS4521

MSOP

THS4521

SOIC

THS4524-EP

www.ti.com

SBOS609A – JUNE 2012 – REVISED AUGUST 2013

Low-Power Applications and the Effects of

Frequency Response Variation due to

Resistor Values on Bandwidth

Package Options

For low-power operation, it may be necessary to

Users can see variations in the small-signal (VOUT =

increase the gain setting resistors values to limit

100 mVPP) frequency response between the available

current consumption and not load the source. Using

package options for the THS452x family as a result of

larger value resistors lowers the bandwidth of the

parasitic elements associated with each package and

THS4524 as a result of the interactions between the

board layout changes. Figure 66 shows the variance

resistors,

the

device

parasitic

capacitance,

and

measured in the lab; this variance is to be expected

printed circuit board (PCB) parasitic capacitance.

even when using a good layout.

Figure 65 shows the small-signal frequency response

with 1-k

Ω, 10-kΩ, and 100-kΩ resistors for RF, RG,

and RL (impedance is assumed to typically increase

for all three resistors in low-power applications).

Figure 66. Small-Signal Frequency Response:

Package Variations

Figure 65. THS4524 Frequency Response with

Various Gain Setting and Load Resistor Values

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THS4524MDBTREP Datasheet(PDF) 29 Page - National Semiconductor (TI)

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