Datasheet > ADUM7703-8BRIZ-RL7

ADUM7703-8BRIZ-RL7

更新时间： 2024-11-25 01:00:27

品牌	Logo	应用领域
亚德诺 - ADI		光电二极管转换器
页数	文件大小	规格书
22页	351K
描述
16-Bit, Isolated, Sigma-Delta ADC

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16-Bit, Isolated,

Sigma-Delta ADC

ADuM7703

Data Sheet

FEATURES

FUN°TIONAL BLO°K DIAGRAM

DD2

DD1

5 MHz to 21 MHz master clock input frequency

Offset drift vs. temperature: 0.6 ꢀμV/° maximum

SNR: 86 dB typical

16 bits, no missing codes

Full-scale analog input voltage range: 320 mμ

ENOB: 14 bits typical

ADuM7703

CLK

MCLKIN

MDAT

DECODER

ENCODER

IN+

DATA

ENCODER

DATA

DECODER

_DD1: 10 mA maximum

GAIN

GND

Σ-∆ ADC

IN–

On-board digital isolator

Operating temperature range

−40/° to +125/° (16-lead SOI°_W)

−40/° to +105/° (8-lead SOI°_I°)

20 μ operation on μ_DD1

GND

Figure 1.

High °MTI: 150 kμVꢀs minimum, μ_DD2= 3.3 μ

Wide-body SOI°s

16-lead SOI°_W

8-lead SOI°_I° with increased creepage

Safety and regulatory approvals

UL recognition

5700 μ rms for 1 minute per UL 1577

°SA °omponent Acceptance Notice 5A (Pending)

μDE °ertificate of °onformity

DIN μ μDE μ 0884-10: μ_IORM= 1270 μ_PEAK

DIN μ μDE μ 0884-11: μ_IORM= 1060 μ_PEAK(Pending)

APPLI°ATIONS

Shunt current monitoring

A° motor controls

Power and solar inverters

Wind turbine inverters

Analog-to-digital and optoisolator replacement

GENERAL DES°RIPTION

The ADuM7703 is a high performance, second-order, Σ-Δ analog-

to-digital converter (ADC) with an integrated low dropout

(LDO) regulator that converts an analog input signal into a high

speed, single-bit data stream with on-chip digital isolation

based on Analog Devices, Inc., iCoupler® technology. The

achieve an 86 dB signal-to-noise ratio (SNR) at 78.1 kSPS with a

256 decimation rate and a 20 MHz master clock. The serial

input and output operates from a 5 V or a 3.3 V supply (V_DD2).

The serial interface is digitally isolated. High speed complementary

metal-oxide semiconductor (CMOS) technology, combined with

monolithic transformer technology, results in the on-chip isolation

providing outstanding performance characteristics, superior to

alternatives such as optocoupler devices. The ADuM7703 device

is available in a 16-lead, wide-body SOIC with an operating

temperature range of −40°C to +125°C and an 8-lead, wide-body

SOIC with an operating temperature range of −40°C to +105°C.

device operates from a 4.5 V to 20 V power supply range (V_DD1

)

and accepts a pseudo differential input signal of 250 mV

( 320 mV full-scale). The pseudo differential input is ideally

suited to shunt voltage monitoring in high voltage applications

where galvanic isolation is required.

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 21 MHz. The original information

can be reconstructed with an appropriate sinc3 digital filter to

Rev. 0

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

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

Technical Support

www.analog.com

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