ADS8505IBDB

Analog To Digital Converters (ADC) Overview

The ADS8505IBDB is a 16-bit, 250-kSPS CMOS analog-to-digital converter (ADC) from Texas Instruments. It utilizes a successive approximation register (SAR) architecture with an internal sample-and-hold circuit. The device operates on a single +5-V supply and features a standard ±10-V input range achieved through precision internal resistors. Key electrical specifications include a maximum integral nonlinearity (INL) of ±1.5 LSB and differential nonlinearity (DNL) of ±1 LSB for the IB grade. It provides full parallel data output via three-state drivers and supports both internal and external reference configurations.

Analog To Digital Converters (ADC) Feature Summary

• 16-bit resolution with 250-kSPS throughput rate
• Standard ±10-V single-ended input range
• Single +5-V supply operation with typical 70-mW power dissipation
• 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 the package designator 'DB' corresponds to the 28-pin SSOP form factor. Confirm the suffix 'I' indicates the industrial temperature range specification of -40°C to 85°C. Ensure the ordering code matches the tube transport media quantity of 50 units as specified in the manufacturer's ordering information table.

Analog To Digital Converters (ADC) Selection Notes

Select the ADS8505IBDB when a 16-bit SAR ADC with a parallel interface is required. The IB grade offers superior linearity (±1.5 LSB INL) compared to the ID grade (±4 LSB INL). This part is suitable for applications needing a standard ±10-V input range without external scaling circuits, provided the system can accommodate a parallel bus and single +5-V supply constraints.

Analog To Digital Converters (ADC) Part Context

This component belongs to the ADS8505 series of high-speed, low-power sampling ADCs. It is pin-compatible with the lower-speed ADS7805 and the 12-bit ADS8504/7804 variants, facilitating design upgrades or downgrades within the same footprint. The device integrates the SAR core, clock, reference buffer, and interface logic into a single CMOS structure.

Analog To Digital Converters (ADC) Replacement Considerations

ADS8505IDB: Lower accuracy grade with ±4 LSB INL and ±2 LSB DNL. ADS8505IBDW: Same performance specifications but housed in a 28-pin SOIC package instead of SSOP.