ADA4937-1 Datasheet, PDF (1/9 Pages) Analog Devices – Ultra-Low Distortion Differential ADC Driver

Preliminary Technical Data
FEATURES
Extremely low harmonic distortion
−100 dBc SFDR @ 10 MHz
−81 dBc SFDR @ 70 MHz
−72 dBc SFDR @ 100 MHz
Low input voltage noise: 2.2 nV/√Hz
High speed
−3 dB bandwidth of 1.6 GHz, G = 1
Slew rate: 5000 V/μs
0.1 dB gain flatness to 125 MHz
Fast settling to 0.01% in 8 ns
Fast overdrive recovery of 4 ns
1 mV typical offset voltage
Externally adjustable gain
Differential to differential or single-ended to differential
operation
Adjustable output common-mode voltage
Single supply operation: +3.3 V to +5 V
Pb-free 3 mm x 3 mm LFCSP package
APPLICATIONS
ADC drivers
Single-ended-to-differential converters
IF and baseband gain blocks
Differential buffers
Line drivers
GENERAL DESCRIPTION
The ADA4937-1 is a low noise, ultra-low distortion, high speed
differential amplifier. It is an ideal choice for driving high
performance ADCs with resolutions up to 16 bits from dc to
100 MHz. The adjustable level of the output common mode
allows the ADA4937-1 to match the input of the ADC. The
internal common mode feedback loop also provides exceptional
output balance as well as suppression of even-order harmonic
distortion products.
Full differential and single-ended to differential gain
configurations are easily realized with the ADA4937-1. A
Ultra-Low Distortion
Differential ADC Driver
ADA4937-1
FUNCTIONAL BLOCK DIAGRAM
+
–
Figure 1.
simple external feedback network of four resistors determines
the amplifier’s closed-loop gain.
The ADA4937-1 is fabricated using ADI’s proprietary third
generation XFCB process, enabling it to achieve very low levels
of distortion with input voltage noise of only 2.2 nV/√Hz. The
low dc offset and excellent dynamic performance of the
ADA4937-1 make it well suited for a wide variety of data
acquisition and signal processing and applications.
The ADA4937-1 is available in a Pb-free, 3 mm x 3mm lead
frame chip scale package (LFCSP). It is specified to operate
over the temperature range of −40°C to +105°C.
Rev. PrA
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