ADA4960-1

Data Sheet

Rev. A | Page 14 of 19

APPLICATIONS INFORMATION

BASIC CONNECTIONS

The basic connections for operating the ADA4960-1 are shown

in Figure 33. Connect VCC to 5 V and decouple each supply pin

with a low inductance surface-mount ceramic capacitor of 0.1 µF

placed as close to the device as possible.

In addition, decouple the VOCM pin and the VCI pin by using

a 0.1 µF capacitor, whether or not they are used as inputs.

For normal operation, the enable pin (PD) should be tied to VCC.

When the ADA4960-1 is pulled low, it goes into power-down

mode. The VOP and VON outputs are internally biased at VCC/2

with no external source. The output common-mode range can

be adjusted in the range of 1 V to 2.75 V by applying an external

source voltage to the VCOM pin.

INPUT AND OUTPUT INTERFACING

The ADA4960-1 can be configured as a differential-input-to-

differential-output driver, as shown in Figure 31.

The differential broadband input is provided by the ETC1-1-13

balun transformer. The two 25 Ω resistors, R1 and R2, provide

the 50 Ω match to the 50 Ω ac source. The 0.1 µF capacitors,

connected in series with the inputs and outputs, isolate the source

and balanced load from the internal bias. R

resistor. Load R

performance (see the Specifications section). Different loads can be

applied with the gain value described by the gain adjust equation

(see the Gain Adjust section).

IIP

VIP

R1

25Ω

50Ω

R2

25Ω

0.1µF

5V

ETC1-1-13

ADA4960-1

0.1µF

0.1µF

0.1µF

AC

VOP

VON

IIN

VIN

2

2

Figure 31. Differential-Input-to-Differential-Output Configuration

The ADA4960-1 can also be configured as a single-ended-input-

to-differential-output driver, as shown in Figure 32. R1 provides the

input source match, and R2 balances the input source impedances.

The 0.1 µF capacitors, connected in series with the inputs and

outputs, isolate the source and balanced load from the internal bias.

R

the expected ac performance (see the Specifications section).

IIP

VIP

R1

50Ω

50Ω

R2

50Ω

0.1µF

5V

ADA4960-1

0.1µF

0.1µF

0.1µF

AC

VOP

VON

IIN

VIN

2

2

Figure 32. Single-Ended-Input-to-Differential-Output Configuration

12

11

10

1

3

4

VCC

VOP

VON

9

VCC

VIP

IIN

2

IIP

VIN

6

NC

5

NC

7

VCC

8

VCC

16

PD

15

GND

14

GND

13

VOCM

ADA4960-1

NC = NO CONNECT

0.1µF

BALANCED

SOURCE

0.1µF

AC

0.1µF

0.1µF

10µF

0.1µF

BALANCED

LOAD

0.1µF

0.1µF

2

2

2

2

Figure 33. Basic Connections of the ADA4960-1