GENERAL DESCRIPTION

The AD7401A1 is a second-order, sigma-delta (Σ-Δ) modulator

that converts an analog input signal into a high speed, 1-bit data

stream with on-chip digital isolation based on the Analog

Devices, Inc., iCoupler? technology. The AD7401A operates

from a 5 V power supply and accepts a pseudo-differential input

signal of ±250 mV (±320 mV full scale). The analog input is

continuously sampled by the analog modulator, eliminating the

need for external sample-and-hold circuitry. The input

information is contained in the output stream as a density of

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

can be reconstructed with an appropriate digital filter. The

serial I/O can use a 5 V or a 3.3 V supply (VDD2).

The serial interface is digitally isolated. High speed CMOS,

combined with Analog Devices, Inc., iCoupler? technology ,

means the on-chip isolation provides outstanding performance

characteristics, superior to alternatives such as optocoupler

devices. The device contains an on-chip reference. The

AD7401A is offered in a 16-lead SOIC and has an operating

temperature range of ?40°C to +125°C.

FEATURES

20 MHz maximum external clock rate

Second-order modulator

16 bits, no missing codes

±2 LSB INL typical at 16 bits

1 μV/°C typical offset drift

On-board digital isolator

On-board reference

±250 mV analog input range

Low power operation: 17 mA typical at 5.5 V

?40°C to +125°C operating range

16-lead SOIC package

Internal clock version: AD7400A

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

VIORM = 891 V peak

Qualified for Automotive Applications

APPLICATIONS

AC motor controls

Shunt current monitoring

Data acquisition systems

Analog-to-digital and opto-isolator replacements

AD7401AYRWZ屬于集成電路（IC） > ADC/DAC - 特殊用途。亞德諾半導(dǎo)體技術(shù)有限公司制造生產(chǎn)的AD7401AYRWZADC/DAC - 特殊用途該產(chǎn)品族中的產(chǎn)品可用于模擬和數(shù)字表示的信息轉(zhuǎn)換，適用于特定用例，或集成了通用數(shù)據(jù)轉(zhuǎn)換器中不常見(jiàn)的其他功能。例如針對(duì)超聲或汽車(chē)?yán)走_(dá)應(yīng)用集成了低噪聲放大器和可變?cè)鲆婕?jí)的器件、注重音頻和視頻的產(chǎn)品、在段碼式顯示器上集成顯示測(cè)量值功能的器件、集成輸入輸出電氣隔離的器件等。