Input voltage definition

V

ID +

V

I)

–

V

I–

V

IC +

V

I) )

V

I–

2

Output voltage definition

V

OD +

V

O)

–

V

O–

V

OC +

V

O) )

V

O–

2

Transfer function

V

OD +

V

ID

x A

f

Output common mode voltage V

OC +

V

OCM

_

+

_

+

Differential Structure Rejects

Coupled Noise at the Output

Differential Structure Rejects

Coupled Noise at the Input

Differential Structure Rejects

Coupled Noise at the Power Supply

−

+

+

−

Vs

Note: For proper operation, maintain symmetry by setting

-

+

+

-

Vs

GAIN

1

2

5

10

390

374

402

402

390

750

2010

4020

RECOMMENDED RESISTOR VALUES

THS4150

THS4151

Figure 37. Definition of the Fully Differential Amplifier

The following schematics depict the differences between the operation of the THS415x, a fully differential

amplifier, in two different modes. Fully differential amplifiers can work with differential input or can be

implemented as single in/differential out.

Figure 38. Amplifying Differential Signals

Figure 39. Single In With Differential Out

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