ADS8505IDW

Analog To Digital Converters (ADC) Overview

The ADS8505IDW is a 16-bit, 250-kSPS CMOS analog-to-digital converter (ADC) from Texas Instruments. It features a single-ended input with a standard ±10-V range and a parallel data interface. The device operates on a single +5-V supply, consuming approximately 70 mW at full speed. Key electrical specifications include an Integral Nonlinearity (INL) of ±4 LSB and Differential Nonlinearity (DNL) of ±2 LSB for the 'I' grade. It utilizes a Successive Approximation Register (SAR) architecture and includes an internal 2.5-V reference. The component is housed in a 28-pin SOIC package and is specified for operation between -40°C and +85°C.

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 reference options
• Full parallel 16-bit data output with 3-state drivers

Analog To Digital Converters (ADC) Applications

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

Analog To Digital Converters (ADC) Procurement Notes

Verify the specific accuracy grade ('I' vs 'B') required for the application, as INL and DNL specifications differ significantly between them. Confirm that the SOIC-28 tube packaging aligns with assembly requirements. Ensure the design accounts for the industrial temperature range (-40°C to +85°C) and single +5-V supply constraints.

Analog To Digital Converters (ADC) Selection Notes

Select the ADS8505IDW when a high-speed, 16-bit ADC with a wide ±10-V input range is needed without external attenuators. Choose this part over lower-speed variants if 250 kSPS throughput is necessary. Consider the 'B' grade variant if tighter linearity specs (±1.5 LSB INL) are critical, though it requires a different ordering suffix.

Analog To Digital Converters (ADC) Part Context

The ADS8505IDW belongs to the ADS8505 family of 16-bit sampling ADCs. It is pin-compatible with the slower ADS7805 and the 12-bit ADS8504/7804, facilitating upgrades in existing designs. The 'DW' suffix specifically denotes the 28-pin SOIC package with tube shipping, distinguishing it from the SSOP 'DB' package or tape-and-reel 'R' variants.

Analog To Digital Converters (ADC) Replacement Considerations

The ADS8505IBDW is a higher-accuracy version of the same package with improved linearity (±1.5 LSB INL). For software-compatible replacements with different interfaces, consider the ADS8509 series, which offers SPI connectivity.