Data Sheet

ADA4960-1

Rev. A | Page 13 of 19

CIRCUIT DESCRIPTION

BASIC STRUCTURE

The ADA4960-1 is a low noise, fully differential amplifier/ADC

driver that uses a single 5 V supply at 60 mA. This amplifier has

buffered inputs that isolate the gain-setting resistor (R

the input signals, keeping a constant 10 kΩ differential input

impedance for all gains.

The differential output impedance is 150 Ω. The gain range is

0 dB to 18 dB and is set using a single resistor (R

IIP

VIP

0.1µF

75Ω

75Ω

0.1µF

AC

VOP

VON

IIN

VIN

ADA4960-1

2

2

2

2

Figure 30. Basic Structure of the ADA4960-1

The ADA4960-1 can be ac-coupled or dc-coupled at the inputs

and/or outputs within the specified input and output common-

mode range.

The inputs, VIP and VIN, have a common-mode voltage range of

2.25 V to 2.75 V and are internally set at VCC/2. The outputs, VOP

and VON, have a common-mode voltage range of 1.0 V to 2.75 V

that can be set externally using the VOCM pin. The VOCM pin

is internally set to VCC/2 with no external connection.

The input of the device can be configured as single-ended or

differential with similar HD3 distortion results.