5 GHz, Low Distortion

ADC Driver/Line Driver

Data Sheet

ADA4960-1

Rev. A

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FEATURES

−3 dB bandwidth of 5 GHz (A

Single resistor programmable gain: 0 dB to 18 dB

Differential or single-ended input to differential output

Low harmonic distortion (HD2/HD3 @ A

−88/−69 dBc @ 250 MHz

−77/−66 dBc @ 500 MHz

−73/−72 dBc @ 1 GHz

IMD3 @ 1 GHz = −63 dBc

Slew rate

8700 V/µs (A

6600 V/μs (A

Fast settling: 1 ns to 1%, 1.4 ns to 0.1%

Fast overdrive recovery: 6.7 ns to 1%, 9.3 ns to 0.5%

Single-supply operation: 5 V

0.1 dB gain flatness to 300 MHz

DC level translation

Available in 16-lead LFCSP

APPLICATIONS

Differential ADC drivers for giga-sample ADCs

GBPS line drivers with pre-emphasis

High speed data acquisition

Electronic surveillance countermeasures

Pulse capture and conditioning

Oscilloscopes

Satellite communications

Single-ended-to-differential converters

RF/IF gain blocks

FUNCTIONAL BLOCK DIAGRAM

IIP

VIP

PD

VCC

VOCM

VOP

VON

GND

IIN

VIN

BIAS CELL

ADA4960-1

Figure 1.

1.2

1.0

0.8

0.6

0.4

0.2

–0.2

–0.4

–0.6

–0.8

–1.0

–1.2

0

–0.2

0

0.2

0.4

0.6

0.8

1.0

80%

20%

SLEW RATE (V/µs)

8700

7700

6

12

18

6600

Figure 2. Rise Time, VOUT = 2 V p-p, TA = 25°C,

For AV = 6 dB, AV = 12 dB, and AV = 18 dB

GENERAL DESCRIPTION

The ADA4960-1 is a high performance, differential amplifier

optimized for RF and IF applications. It achieves better than 63 dB

IMD3 performance for frequencies up to and beyond 1 GHz,

making it an ideal driver for 8-bit to 10-bit giga-sample analog-

to-digital converters (ADCs).

The buffered inputs of the ADA4960-1 isolate the gain-setting

resistor (R

input resistance, easing matching and input drive requirements.

The ADA4960-1 has a nominal 150 Ω differential output impedance.

The ADA4960-1 is optimized for wideband, low distortion

performance for frequencies up to and beyond 1 GHz. These

attributes, together with its adjustable gain capability, make this

device the amplifier of choice for general-purpose IF and broad-

band applications where low distortion, noise, and power are critical.

The device is optimized for the best combination of slew rate,

bandwidth, and broadband distortion. These attributes allow it

to drive a wide variety of ADCs. It is ideally suited for driving

mixers, pin diode attenuators, SAW filters, and multi-element

discrete devices.

The user accessible gain adjust and bandwidth extension features

allow configuration of the ADA4960-1 for line driver and

channel equalization applications.

The quiescent current of the ADA4960-1 is typically 60 mA. When

disabled, it consumes less than 3 mA, offering excellent input-to-

output isolation.

Fabricated on an Analog Devices, Inc., high speed SiGe process,

the ADA4960-1 is available in a compact 3 mm × 3 mm, 16-lead

LFCSP. It operates over the temperature range of −40°C to +85°C.