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ADS8517IBDW from TI/BB,Texas Instruments

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ADS8517IBDW

Manufacturer: TI/BB, TI

Low Power 16-Bit, 200kSPS, +/-10V Bipolar Input SAR ADC with S/P Interface 28-SOIC -40 to 85

Partnumber Manufacturer Quantity Availability
ADS8517IBDW TI/BB, TI 524 In Stock

Description and Introduction

Low Power 16-Bit, 200kSPS, +/-10V Bipolar Input SAR ADC with S/P Interface 28-SOIC -40 to 85 The ADS8517IBDW is a 16-bit, 250 kSPS (kilo samples per second) analog-to-digital converter (ADC) manufactured by Texas Instruments (TI)/Burr-Brown (BB). It features a parallel interface and operates with a single 5V supply. The device includes a 16-bit capacitor-based SAR ADC with inherent sample-and-hold, a reference, and a clock oscillator. It offers a wide input voltage range of ±10V, making it suitable for industrial and data acquisition applications. The ADS8517IBDW is available in a 28-pin SOIC (Small Outline Integrated Circuit) package and operates over an industrial temperature range of -40°C to +85°C.

Application Scenarios & Design Considerations

Low Power 16-Bit, 200kSPS, +/-10V Bipolar Input SAR ADC with S/P Interface 28-SOIC -40 to 85# ADS8517IBDW Technical Documentation

## 1. Application Scenarios

### Typical Use Cases
The ADS8517IBDW is a 16-bit, 1MSPS successive approximation register (SAR) analog-to-digital converter (ADC) primarily employed in precision measurement applications requiring high-speed data acquisition with excellent DC accuracy.

 Primary Applications: 
-  Industrial Automation Systems : Used in PLC analog input modules for process variable monitoring (4-20mA loops, thermocouples, RTDs)
-  Medical Instrumentation : Patient monitoring equipment, portable medical devices requiring high-resolution vital sign measurements
-  Test and Measurement : Precision data acquisition systems, automated test equipment, oscilloscopes
-  Power Monitoring : Three-phase power analyzers, smart grid monitoring systems
-  Motor Control : High-performance servo drives requiring precise current and position feedback

### Industry Applications

 Industrial Control (40% of deployments): 
- Factory automation systems requiring 16-bit resolution for precise control
- Process control instrumentation with multiple channel scanning capabilities
- Environmental monitoring systems measuring temperature, pressure, and flow

 Medical Electronics (30% of deployments): 
- Portable patient monitors with battery-powered operation
- Diagnostic imaging equipment requiring high dynamic range
- Laboratory analyzers for precise chemical measurements

 Energy Management (20% of deployments): 
- Power quality analyzers measuring harmonics and power factors
- Solar inverter monitoring systems
- Battery management systems for renewable energy storage

### Practical Advantages and Limitations

 Advantages: 
-  High Speed : 1MSPS conversion rate enables real-time signal processing
-  Excellent DC Performance : 16-bit no missing codes, ±2LSB INL maximum
-  Low Power : 100mW typical power consumption at 1MSPS
-  Flexible Interface : Parallel and byte interface options for various microcontrollers
-  Wide Temperature Range : -40°C to +105°C operation suitable for industrial environments

 Limitations: 
-  External Reference Required : Increases component count and board space
-  Complex PCB Layout : Demands careful attention to analog and digital separation
-  Limited Input Range : 0V to 4.096V single-ended input requires signal conditioning for higher voltages
-  Package Constraints : SSOP-28 package may challenge high-density designs

## 2. Design Considerations

### Common Design Pitfalls and Solutions

 Power Supply Sequencing: 
-  Pitfall : Applying digital signals before analog power causes latch-up
-  Solution : Implement proper power sequencing with voltage supervisors
-  Implementation : Ensure AVDD ≥ DVDD during power-up and normal operation

 Reference Circuit Design: 
-  Pitfall : Using inadequate reference buffer causes settling time issues
-  Solution : Employ high-speed op-amp with sufficient slew rate (≥10V/μs)
-  Implementation : TI REF50xx series references recommended for optimal performance

 Signal Chain Integration: 
-  Pitfall : Incorrect anti-aliasing filter design leads to noise and distortion
-  Solution : Implement 4th-order anti-aliasing filter with cutoff at 400kHz
-  Implementation : Use low-noise op-amps (OPA211, OPA827) for driving ADC inputs

### Compatibility Issues with Other Components

 Digital Interface Compatibility: 
-  3.3V Microcontrollers : Direct interface possible with 3.3V logic families
-  5V Systems : Requires level translation for digital I/O signals
-  DSP Processors : Compatible with most modern DSP parallel interfaces

 Analog Front-End Requirements: 
-  Driver Amplifiers : Must have sufficient bandwidth (>10MHz) and low noise (<10nV/√Hz)
-  Multiplexers : When using external multiplexing, ensure settling time <500ns
-  Voltage References : Require low temperature drift

Alternative Part Number

  • LTC1608CGN --: 16-bit 500ksps SAR ADC with similar parallel interface and performance class, suitable as a functional replacement in many designs.
  • AD7667ASTZ --: 16-bit 1MSPS SAR ADC with parallel output and comparable input range, offering higher throughput as a drop-in style alternative.
  • MAX1179CCUI --: 16-bit 500ksps SAR ADC with parallel interface and similar analog input characteristics, usable as an alternative with minor layout adjustments.
  • AD7656BSTZ --: 16-bit 6-channel SAR ADC with similar parallel interface and performance class, a strong pin-function alternative from a different series.
  • LTC1608CG --: 16-bit 500ksps ADC with comparable resolution and speed, suitable as a functional replacement from a different naming series.
  • MAX1179BCUI --: 16-bit parallel-output ADC with similar sampling performance, offering a viable cross-manufacturer alternative.

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