LM363 datasheet(14/22 Pages) NSC

Part #	LM363

Description	LM363 Precision Instrumentation Amplifier

PDF	22 Pages

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Manufacturer	NSC [National Semiconductor (TI)]

Direct Link	http://www.national.com

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14 / 22 page

Application Hints (Continued)

If power supply rejection is critical frequently only the nega-

tive PSRR need be adjusted since the positive PSRR is

more tightly specified Any or all of the trim schemes of

Figure 10 can be combined as desired As long as the cen-

ter tap of the 100k trimpot is returned to a voltage 200 mV

below Va the trim schemes shown will not greatly affect

TLH5609 – 17

VOS Both the gain and DC CMRR trims can degrade posi-

tive PSRR the positive PSRR can then be nulled out if de-

sired The correct order of trimming from first to last is bias

current gain CMRR negative PSRR positive PSRR and

VOS

Top Trace Cable Shield Grounded

Bottom Trace Cable Shield Bootstrapped

TLH5609 – 18

FIGURE 9 Improved Response using Shield Drivers

TLH5609 – 19

FIGURE 10 Other Trims for 16-Pin Package

LM363 Datasheet(PDF) 14 Page - National Semiconductor (TI)