ADS8505IDWR

Analog To Digital Converters (ADC) Overview

The ADS8505IDWR 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 provides a full parallel data output via three-state drivers and supports both internal and external reference configurations. Key performance metrics include a maximum integral nonlinearity (INL) of ±4 LSB and differential nonlinearity (DNL) of ±2 LSB for the 'I' grade. It is housed in a 28-pin SOIC package and specified for operation over the industrial temperature range of -40°C to +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 (2.3 V to 2.7 V)
• Full parallel 16-bit data output with three-state drivers

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 defined in the manufacturer's package option addendum. Confirm the specific accuracy grade ('I' vs 'B') required for the application, as linearity specifications differ between grades. Ensure the design accounts for the 1000-unit reel quantity associated with this suffix.

Analog To Digital Converters (ADC) Selection Notes

Select the ADS8505IDWR when a parallel interface is preferred over serial protocols like SPI. This part is suitable for applications requiring a ±10-V input range without external attenuation circuitry. Consider the power dissipation of approximately 70 mW at 250 kSPS. If lower speed or serial communication is acceptable, alternative parts in the family may offer reduced pin counts or different interfaces.

Analog To Digital Converters (ADC) Part Context

The ADS8505IDWR belongs to the ADS8505 series of high-speed, 16-bit sampling ADCs. It is pin-compatible with the lower-speed ADS7805 and the 12-bit ADS8504/7804, facilitating upgrades within existing designs. The 'DW' designation indicates the SOIC-28 package, while 'R' denotes the tape and reel shipping method.

Analog To Digital Converters (ADC) Replacement Considerations

ADS8505IBDWR is available as a higher-accuracy alternative with improved INL and DNL specifications. For serial interface requirements, the ADS8513 series offers similar resolution with SPI connectivity.