ADS8505IBDBG4

Analog To Digital Converters (ADC) Overview

The ADS8505IBDBG4 is a 16-bit, 250-kSPS successive approximation register (SAR) analog-to-digital converter manufactured by Texas Instruments. It operates from a single +5-V supply and features a standard ±10-V input range with an internal 2.5-V reference. The device utilizes a 28-pin SSOP package and supports parallel data output in binary 2's complement format. Key performance metrics include a maximum integral nonlinearity (INL) of ±1.5 LSB, differential nonlinearity (DNL) of ±1 LSB, and a spurious-free dynamic range (SFDR) of 105 dB at the full sampling rate.

Analog To Digital Converters (ADC) Feature Summary

• 16-bit resolution with 250-kSPS throughput rate
• Single +5-V supply operation with typical power dissipation of 70 mW
• Internal 2.5-V reference or external reference capability
• Standard ±10-V analog input range with inherent overvoltage protection

Analog To Digital Converters (ADC) Applications

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

Analog To Digital Converters (ADC) Procurement Notes

Verify the ordering suffix 'DB' corresponds to the 28-pin SSOP package and 'G4' indicates lead-free/RoHS compliance as per Texas Instruments documentation. Confirm the temperature grade 'I' specifies industrial operation from -40°C to +85°C. Ensure the specific revision level matches the design requirements, as datasheet specifications may evolve.

Analog To Digital Converters (ADC) Selection Notes

Select this component for applications requiring high linearity and low power from a single supply. The internal reference simplifies design but requires a 2.2-μF capacitor on the CAP pin for optimal noise performance. For systems needing higher precision than the ±1.5 LSB INL allows, consider alternative models within the family. Ensure the driving circuit impedance is compatible with the 11.5 kΩ input impedance.

Analog To Digital Converters (ADC) Part Context

The ADS8505IBDBG4 belongs to the ADS8505 series of 16-bit CMOS ADCs. It is pin-compatible with the lower-speed ADS7805 and the 12-bit ADS8504/7804, facilitating design upgrades. The 'IB' designation denotes the industrial temperature grade with tighter accuracy specifications compared to the 'ID' variant.

Analog To Digital Converters (ADC) Replacement Considerations

ADS8505IBDB is the direct equivalent without the G4 suffix. ADS8505IDB offers similar functionality but with relaxed accuracy specifications (±4 LSB INL). ADS7805 is a pin-compatible alternative with a lower sampling rate.