ADS8505IBDWR

Analog To Digital Converters (ADC) Overview

The ADS8505IBDWR is a 16-bit, 250-kSPS successive approximation register (SAR) analog-to-digital converter from Texas Instruments. It operates on a single +5-V supply and features a standard ±10-V input range with an internal 2.5-V reference. The device provides full parallel data output in binary 2's complement format via three-state drivers. Key performance metrics include a maximum integral nonlinearity (INL) of ±1.5 LSB and differential nonlinearity (DNL) of ±1 LSB for the 'B' grade, ensuring no missing codes. It achieves a spurious-free dynamic range (SFDR) of 105 dB at the maximum sampling rate.

Analog To Digital Converters (ADC) Feature Summary

• 16-bit resolution with 250-kSPS throughput rate
• Standard ±10-V single-ended input range
• Internal or external 2.5-V reference capability
• Full parallel 16-bit data output with three-state drivers
• Single +5-V supply operation with <100 mW power dissipation

Analog To Digital Converters (ADC) Applications

• Industrial process control systems
• Data acquisition systems
• Medical equipment
• Instrumentation

Analog To Digital Converters (ADC) Procurement Notes

Verify that the ordering suffix 'R' corresponds to the tape and reel packaging configuration as specified in the manufacturer's package ordering information. Confirm the 'B' grade designation ensures the tighter linearity specifications of ±1.5 LSB INL and ±1 LSB DNL compared to the 'I' grade. Ensure the SOIC-28 package variant matches the PCB footprint requirements.

Analog To Digital Converters (ADC) Selection Notes

Select this component when a high-speed, high-resolution ADC with a wide analog input range is required without dual supplies. The internal reference simplifies design but may require an external buffer if significant DC load current is needed. Consider the 'B' grade for applications demanding strict linearity limits. Verify that the parallel interface timing constraints align with the host microprocessor or DSP capabilities.

Analog To Digital Converters (ADC) Part Context

The ADS8505 belongs to the ADS8505 series of 16-bit CMOS SAR ADCs. It is pin-compatible with the lower-speed ADS7805 and the 12-bit ADS8504/7804, facilitating design upgrades. The device is available in both SOIC and SSOP 28-pin packages, with the 'R' suffix indicating tape and reel availability for automated assembly processes.

Analog To Digital Converters (ADC) Replacement Considerations

Publicly confirmed substitutes listed by distributors include the LTC1606ACG#PBF from Analog Devices Inc.