THS4521 datasheet(28/58 Pages) TI2

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VOUT+

VIN±

VIN+

RIT

No Connection

VOUT±

VS+

THS4531

VS±

For BW

Measure With

Diff Probe Here

No Connection

Cal Diff Probe

49.9

VOCM

From Network

Analyzer

RCM

For ZIN

Measure With

Diff Probe Here

VOCM

VOUT+

VIN–

VIN+

0.22 μF

ROT

RIT

No Connection

VOUT–

VS+

THS4531

VS–

Measure With

Diff Probe

No Connection

Power

Supply

Network

Analyzer

Cal Diff Probe

–

VOCM

THS4531

SLOS358C – SEPTEMBER 2011 – REVISED APRIL 2020

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Product Folder Links: THS4531

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Figure 71. PSRR Test Circuit

9.1.5 VOCM Input

The circuit shown in Figure 72 is used to measure the transient response, frequency response and input

impedance of the VOCM input. For these tests, the cal point is across the 49.9 Ω VOCM termination resistor.

Transient response and frequency response are measured with RCM = 0 Ω and using a high impedance

differential probe at the summing junction of the two RO resistors, with respect to ground. The input impedance is

measured using a high impedance differential probe at the VOCM pin and the drop across RCM is used to calculate

the impedance seen looking into the amplifier’s VOCM input.

Figure 72. VOCM Input Test Circuit

THS4521 Datasheet(PDF) 28 Page - Texas Instruments

THS4521 Datasheet(HTML) 28 Page - Texas Instruments

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