參數(shù)資料
型號(hào): ADA4938-1ACPZ-R7
廠商: ANALOG DEVICES INC
元件分類: 通用總線功能
英文描述: Ultra-Low Distortion Differential ADC Driver
中文描述: LINE DRIVER, QCC16
封裝: 3 X 3 MM, ROHS COMPLIANT, MO-220VEED-2, LFCSP-16
文件頁數(shù): 1/14頁
文件大小: 307K
代理商: ADA4938-1ACPZ-R7
Ultra-Low Distortion
Differential ADC Driver
ADA4938-1
Preliminary Technical Data
FEATURES
Rev. PrD
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarks and registered trademarks are the property of their respective owners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.461.3113
2007 Analog Devices, Inc. All rights reserved.
www.analog.com
Extremely low harmonic distortion
112 dBc HD2 @ 10 MHz
79 dBc HD2 @ 50 MHz
102 dBc HD3 @ 10 MHz
81 dBc HD3 @ 50 MHz
Low input voltage noise: 2.2 nV/√Hz
High speed
3 dB bandwidth of 1.5 GHz, G = 1
Slew rate: 4700 V/μs
0.1 dB gain flatness to 125 MHz
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
Wide Supply Voltage Range: +5 V & ± 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 ADA4938-1 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 70
MHz. The output common mode voltage is adjustable over a
wide range, allowing the ADA4938-1 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 ADA4938-1. A
simple external feedback network of four resistors determines
the amplifier’s closed-loop gain.
FUNCTIONAL BLOCK DIAGRAM
+
Figure 1.
The ADA4938-1 is fabricated using ADI’s proprietary third
generation high-voltage 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 ADA4938-1 make it well suited for a wide variety of data
acquisition and signal processing and applications.
The ADA4938-1 is available in a Pb-free, 3 mm x 3mm lead
frame chip scale package (LFCSP). Pinout has been optimized
to facilitate layout and minimize distortion. The part is
specified to operate over the extended industrial temperature
range of 40°C to +85°C.
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