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R

IN

R

IN

C

IN

R

T

100W

1:1

R

S

100W

OPA695

R

1

400W

A

V = 8V/V

(18dB)

R

2

57.5 W

V

IN

INP

INM

CM

5V

+5V

10 W

25 W

25 W

ADS5522

1000pF

0.1 F

m

0.1 F

m

ADS5522

SBAS320C – MAY 2004 – REVISED FEBRUARY 2007

Table 4. Recommended Amplifiers to Drive the Input of the ADS5522

INPUT SIGNAL FREQUENCY

RECOMMENDED AMPLIFIER

TYPE OF AMPLIFIER

USE WITH TRANSFORMER?

DC to 20 MHz

THS4503

Differential In/Out Amp

No

DC to 50 MHz

OPA847

Operational Amp

Yes

DC to 100 MHz

THS4509

Differential In/Out Amp

No

OPA695

Operational Amp

Yes

10 MHz to 120 MHz

THS3201

Operational Amp

Yes

THS3202

Operational Amp

Yes

Over 100 MHz

THS9001

RF Gain Block

Yes

Figure 39. Converting a Single-Ended Input Signal to a Differential Signal Using an RF Transformer

22

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