Product Details
Product Description
Product Description
explain
AD7401A1 is a second-order sigma delta（ Σ-Δ） Modulator, based on the on-chip digital isolation of analog equipment company, converts analog input signals into high-speed 1-bit data stream. The AD7401A operates from a 5V power supply and receives a pseudo differential input signal of ± 250 mV (± 320 mV full scale). The analog input is continuously sampled by an analog modulator, eliminating the need for external sampling and holding circuits. The input information is contained in the output stream at a density of data information with a data rate up to 20 MHz. The original information can be reconstructed with an appropriate digital filter. A 5V or 3.3V power supply (VDD2) can be used for serial I/O.
Serial interfaces are digitally isolated. High speed CMOS, combined with analog equipment company, i coupler ® Technology means that on-chip isolation provides outstanding performance characteristics and is superior to other options, such as optical coupler devices. The device contains an on-chip reference file. The AD7401A uses a 16 lead SOIC with 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
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