Datasheet > AD7405

AD7405

更新时间： 2023-12-20 18:45:41

品牌	Logo	应用领域
亚德诺 - ADI		/
页数	文件大小	规格书
20页	360K
描述
采用LVDS接口的16位隔离式Σ-Δ调制器

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AD7405 数据手册

16-Bit, Isolated Sigma-Delta Modulator,

LVDS Interface

Data Sheet

AD7405

FEATURES

FUNCTIONAL BLOCK DIAGRAM

DD2

DD1

5 MHz to 20 MHz external clock input rate

16 bits, no missing codes

AD7405

Signal-to-noise ratio (SNR): 88 dB typical

Effective number of bits (ENOB): 14.2 bits typical

Typical offset drift vs. temperature: 1.6 µV/°C

Low voltage differential signaling (LVDS) interface

On-board digital isolator

MCLKIN+

BUF

(5MHz TO

20MHz)

CLK

DECODER

ENCODER

MCLKIN–

REF

IN+

MDAT+

Σ-Δ ADC

On-board reference

DATA

ENCODER

DATA

DECODER

IN–

Full-scale analog input voltage range: 320 mV

−40°C to + 125°C operating temperature range

High common-mode transient immunity: >25 kV/µs

16-lead, wide-body SOIC_IC, with increased creepage

package

MDAT–

GND

Figure 1.

Safety and regulatory approvals

UL recognition

5000 V rms for 1 minute per UL 1577

CSA Component Acceptance Notice 5A

VDE Certificate of Conformity

DIN V VDE V 0884-10 (VDE V 0884-10):2006-12

Maximum working insulation voltage (V_IORM): 1250 V_PEAK

APPLICATIONS

Shunt current monitoring

AC motor controls

Power and solar inverters

Wind turbine inverters

Data acquisition systems

Analog-to-digital and opto-isolator replacements

GENERAL DESCRIPTION

The AD7405¹is a high performance, second-order, Σ-Δ modulator

that converts an analog input signal into a high speed, single-bit

LVDS data stream, with on-chip digital isolation based on

Analog Devices, Inc., iCoupler® technology. The AD7405 operates

from a 4.5 V to 5.5 V (V_DD1) power supply and accepts a

differential input signal of 250 mV ( 320 mV full-scale). The

differential input is ideally suited to shunt voltage monitoring in

high voltage applications where galvanic isolation is required.

can be reconstructed with an appropriate digital filter to achieve

88 dB SNR at 78.1 kSPS. The LVDS input/output can use a 3 V

to 5.5 V supply (V_DD2).

The LVDS interface is digitally isolated. The LVDS interface

technology, combined with monolithic transformer technology,

means the on-chip isolation provides outstanding performance

characteristics, superior to alternatives such as optocoupler

devices. The AD7405 device is offered in a 16-lead, wide-body

SOIC_IC package and has an operating temperature range of

−40°C to +125°C.

The analog input is continuously sampled by a high performance

analog modulator, and converted to a ones density digital output

stream with a data rate of up to 20 MHz. The original information

¹Protected by U.S. Patents 5,952,849; 6,873,065; and 7,075,329.

Rev. A

Document Feedback

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

rightsof third parties that may result fromits 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 andregisteredtrademarks 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

Technical Support

www.analog.com

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