ADA4960-1 Datasheet, PDF (1/6 Pages) Analog Devices – Low Distortion Ultrahigh Speed Differential ADC Driver

Preliminary Technical Data
FEATURES
Adjustable output common-mode voltage
Externally adjustable gain
−3 dB bandwidth of 3GHz, (all gains)
Low harmonic distortion (H2/H3 SE->DIFF)
-77/-67 dBc @ 250 MHz
-69/-63 dBc @ 500 MHz
-52/-63 dBc @ 1GHz
IMD3 @ 1GHz = 67dBc
Slew rate 8000 V/μs
Fast overdrive recovery of 1 ns
Low input voltage noise of 3.6 nV/√Hz
Low power dissipation: 60 mA quiescent current
0.1 dB gain flatness to TBD MHz
Available in 16-Lead and 24-Lead LFSCP packages
APPLICATIONS
ADC drivers for giga-sample ADCs
Single-ended-to-differential converters
RF/IF gain block
Line drivers
Oscilloscopes
Satellite Communications
Data Acquisition
Electronic Surveillance and Countermeasures
Low Distortion Ultrahigh Speed
Differential ADC Driver
ADA4960-1
PIN CONFIGURATION
Figure 1.
GENERAL DESCRIPTION
The ADA4960-1 is a high performance differential amplifier
optimized for RF and IF applications. It achieves better than
63dB SFDR performance at frequencies up to 500 MHz, and
52dB up to 1GHz, making it an ideal driver for high speed 8-bit
to 10-bit giga-sample analog-to-digital converters (ADCs).
Unlike other wideband differential amplifiers, the ADA4960-1
has buffered inputs that isolate the gain-setting resistor (RG)
from the signal inputs. As a result, the ADA4960-1 maintains a
constant 10 kΩ differential input resistance for gains of 6 dB to
15 dB, easing matching and input drive requirements. The
ADA4960-1 has a nominal 150 Ω differential output resistance.
The device is optimized for wideband, low distortion performance
at frequencies up to and beyond 1 GHz. These attributes,
together with its wide gain adjust capability make this device
the amplifier of choice for general-purpose IF and broadband
applications where low distortion, noise, and power are critical.
Rev. PrB
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The device also includes a unity gain buffer, for the buffering of
DC signals such as the common-mode-input to the amplifier.
This buffer is found between pins 6 (input) and pin5 (output).
If this buffer is not used, the output can be left disconnected
and the input can be grounded.
It is ideally suited for driving not only ADCs, but also mixers,
pin diode attenuators, SAW filters, and multi-element discrete
devices, as well as buffering high frequency DACs. The device
will be available in a single channel version in 3 mm ×3 mm,
16-lead LFCSP package or a dual channel version in 4 mm x 4
mm, 24-lead LFSCP. The device operates over a temperature
range of −40°C to +105°C.
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