Datasheet > ADA4927-2

ADA4927-2

更新时间： 2024-01-31 08:52:43

品牌	Logo	应用领域
亚德诺 - ADI		驱动器
页数	文件大小	规格书
24页	840K
描述
Ultralow Distortion Current Feedback Differential ADC Driver

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ADA4927-2 数据手册

Ultralow Distortion

Current Feedback Differential ADC Driver

ADA4927-1/ADA4927-2

FUNCTIONAL BLOCK DIAGRAMS

FEATURES

Extremely low harmonic distortion

−105 dBc HD2 @ 10 MHz

−91 dBc HD2 @ 70 MHz

−87 dBc HD2 @ 100 MHz

−103 dBc HD3 @ 10 MHz

−98 dBc HD3 @ 70 MHz

ADA4927-1

12 PD

–FB

+IN

–IN

11 –OUT

10 +OUT

+FB

9 V

OCM

−89 dBc HD3 @ 100 MHz

Better distortion at higher gains than VF amplifiers

Low input voltage noise: 1.4 nV/√Hz

High speed

Figure 1.

−3 dB bandwidth of 2.3 GHz

0.1 dB gain flatness: 150 MHz

Slew rate: 5000 V/μs, 25% to 75%

Fast 0.1% settling time: 10 ns

Low input offset voltage: 0.3 mV typical

Externally adjustable gain

Stability and bandwidth controlled by feedback resistor

Differential-to-differential or single-ended-to-differential

operation

–IN1

+FB1

18 +OUT1

17 V

OCM1

16 –V

ADA4927-2

–V

–FB2

+IN2

PD2

13 –OUT2

Adjustable output common-mode voltage

Wide supply operation: +5 V to 5 V

Figure 2.

APPLICATIONS

–40

–50

–60

–70

–80

ADC drivers

= 2V p-p

OUT dm

Single-ended-to-differential converters

IF and baseband gain blocks

Differential buffers

Differential line drivers

GENERAL DESCRIPTION

–90

–100

–110

–120

–130

The ADA4927 is a low noise, ultralow distortion, high speed,

current feedback differential amplifier that is an ideal choice for

driving high performance ADCs with resolutions up to 16 bits

from dc to 100 MHz. The output common-mode level can easily be

matched to the required ADC input common-mode levels. The

internal common-mode feedback loop provides exceptional output

balance and suppression of even-order distortion products.

G = 1

G = 10

G = 20

100

FREQUENCY (MHz)

Figure 3. Spurious-Free Dynamic Range vs. Frequency at Various Gains

Differential gain configurations are easily realized using an

external feedback network comprising four resistors. The

current feedback architecture provides loop gain that is nearly

independent of closed-loop gain, achieving wide bandwidth,

low distortion, and low noise at higher gains and lower power

consumption than comparable voltage feedback amplifiers.

The low dc offset and excellent dynamic performance of the

ADA4927 make it well suited for a wide variety of data acquisition

and signal processing applications.

The ADA4927-1 is available in a Pb-free, 3 mm × 3 mm 16-lead

LFCSP, and the ADA4927-2 is available in a Pb-free, 4 mm × 4 mm

24-lead LFCSP. The pinouts are optimized to facilitate printed

circuit board (PCB) layout and to minimize distortion. They are

specified to operate over the −40°C to +105°C temperature range.

The ADA4927 is fabricated using the Analog Devices, Inc., silicon-

germanium complementary bipolar process, enabling very low

levels of distortion with an input voltage noise of only 1.3 nV/√Hz.

Rev. 0

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 registeredtrademarks arethe 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

www.analog.com

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与ADA4927-2相关器件

型号	品牌	获取价格	描述	数据表
ADA4927-2YCPZ-R2	ADI	获取价格	Ultralow Distortion Current Feedback Differential ADC Driver
ADA4927-2YCPZ-R7	ADI	获取价格	Ultralow Distortion Current Feedback Differential ADC Driver
ADA4927-2YCPZ-RL	ADI	获取价格	Ultralow Distortion Current Feedback Differential ADC Driver
ADA4930-1	ADI	获取价格	Ultralow Noise Drivers for Low Voltage ADCs
ADA4930-1SCPZ-EPR2	ADI	获取价格	Ultralow Noise Drivers for Low Voltage ADCs
ADA4930-1SCPZ-EPR7	ADI	获取价格	Ultralow Noise Drivers for Low Voltage ADCs
ADA4930-1YCP-EBZ	ADI	获取价格	Ultralow Noise Drivers for Low Voltage ADCs
ADA4930-1YCPZ-R2	ADI	获取价格	Ultralow Noise Drivers for Low Voltage ADCs
ADA4930-1YCPZ-R7	ADI	获取价格	Ultralow Noise Drivers for Low Voltage ADCs
ADA4930-1YCPZ-RL	ADI	获取价格	Ultralow Noise Drivers for Low Voltage ADCs

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