AD7400A Isolated Sigma-Delta Modulator

The AD7400A 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 an 8-lead surface-mount PDIP with gull wing leads and a 16-lead SOIC package.

Applications
  • AC motor controls
  • Shunt current monitoring
  • Data acquisition systems
  • Analog-to-digital and opto-isolator replacements
Features and Benefits
  • 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
  • 8-lead surface-mount PDIP package with gull wing leads and 16-lead SOIC package
  • See Data Sheet for Additional Information
Analog to Digital Converters
Interface & Isolation
IBIS Models
Reference Designs
Data Sheets
Documentnote
AD7400A: Isolated Sigma-Delta Modulator Data Sheet (Rev. D)PDF 322 kB
Frequently Asked Questions
Documentnote
Order Information
Part NumberPackagePacking QtyTemp RangePrice 100-499Price 1000+RoHS
AD7400AYRWZ Production16 ld SOIC - WideOTH 47-40 to 125C3.63.05Y
AD7400AYRWZ-RL Production16 ld SOIC - WideREEL 1000-40 to 125C03.05Y
Evaluation Boards
Part NumberDescriptionPriceRoHS
EVAL-AD7400AEDZEvaluation Board59Y
EVAL-CED1ZEvaluation Controller Board249Y
Reference Materials
AD7400A: Isolated Sigma-Delta Modulator Data Sheet (Rev. D) ad7400a
AD7400/AD7401 IBIS Model ad7400
CN0185 设计和集成文件 adp3301
数字隔离器产品选型与资源指南 adum1233
CN-0185:采用隔离式Σ-Δ型调制器、隔离式DC/DC转换器和有源滤波器的新型模拟/模拟隔离器 adp3300
Inside iCoupler® Technology:ADuM347x PWM Controller and Transformer Driver with ad7400
NAppkin Note: Lowering the Power of the ADuM524x ad7400