THS4532IPW datasheet(27/44 Pages) NSC

Part #	THS4532IPW

Description	Ultra Low Power, Rail-to-Rail Output, Fully-Differential Amplifier

PDF	44 Pages

Scroll/Zoom	100%

Manufacturer	NSC [National Semiconductor (TI)]

Direct Link	http://www.national.com

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27 / 44 page

VOUT+

VIN-

VIN+

0.22 F

RIT

Input From 50-

Test Equipment

No Connection

49.9

VOUT±

Installed to Balance

Amplifier

VS+

THS4532

VS±

Measure With

Diff Probe Here

Cal Diff Probe

VOCM

THS4532

www.ti.com

SLOS829 – FEBRUARY 2013

Balance Error

The circuit shown in Figure 75 is used to measure the balance error of the main differential amplifier. A network

analyzer is used as the signal source and the measurement device. The output impedance of the network

analyzer is 50

Ω and is DC coupled. RIT and RG are chosen to impedance match to 50Ω and maintain the proper

gain. To balance the amplifier, a 49.9

Ω resistor to ground is inserted across RIT on the alternate input. The output

is measured using a high impedance differential probe at the summing junction of the two RO resistors, with

respect to ground.

Figure 75. Balance Error Test Circuit

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THS4532IPW Datasheet(PDF) 27 Page - National Semiconductor (TI)