AD7400A屬于集成電路（IC）的ADC/DAC-特殊用途。由亞德諾半導(dǎo)體技術(shù)有限公司制造生產(chǎn)的AD7400AADC/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。

GENERAL DESCRIPTION

The AD7400A1 is a second-order, Σ-Δ modulator that converts

an analog input signal into a high speed, 1-bit data stream with on-chip digital isolation based on Analog Devices, Inc., iCoupler? technology. The AD7400A operates from a 5 V power supply and accepts a differential input signal of ±250 mV (±320 mV

full-scale). The analog input is sampled continuously 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 10 MHz.

The original information can be reconstructed with an appropriate

digital filter. The serial I/O can use a 5 V or a 3 V supply (VDD2).

The serial interface is digitally isolated. High speed CMOS,

combined with monolithic air core transformer technology, means the on-chip isolation provides outstanding performance characteristics superior to alternatives such as optocoupler devices. The part contains an on-chip reference and has an

operating temperature range of ?40°C to +125°C. The AD7400A

is offered in a 16-lead SOIC package.

FEATURES 10 MHz clock rate Second-order modulator

16 bits, no missing codes

±2 LSB INL typical at 16 bits 1.5 μV/°C typical offset drift On-board digital isolator On-board reference ±250 mV analog input range Low power operation: 15.5 mA typical at 5.5 V ?40°C to +125°C operating range

16-lead SOIC package

AD7401A, external clock version in 16-lead SOIC

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

APPLICATIONS

AC motor controls

Shunt current monitoring

Data acquisition systems Analog-to-digital and opto-isolator replacements