ADS8402IBPFBTG4

Analog To Digital Converters (ADC) Overview

The ADS8402IBPFBTG4 is a 16-bit, 1.25 MSPS successive approximation register (SAR) analog-to-digital converter with a unipolar differential input range of Vref to –Vref. It features an onboard 4.096-V reference and buffer. The device operates with a 5-V analog supply (+VA) and a wide digital supply (+VBD). Key electrical parameters include a maximum integral linearity error of ±3.5 LSB and a typical power dissipation of 155 mW at full throughput. It utilizes a high-speed parallel interface supporting both 8-bit and 16-bit data bus transfers.

Analog To Digital Converters (ADC) Feature Summary

• 16-Bit Resolution with No Missing Codes
• 1.25-MSPS Throughput Rate
• Onboard 4.096-V Reference and Buffer
• Unipolar Differential Input Range

Analog To Digital Converters (ADC) Applications

• DWDM Systems
• Instrumentation
• High-Speed Data Acquisition Systems
• Transducer Interface
• Medical Instruments

Analog To Digital Converters (ADC) Procurement Notes

Verify the specific suffix 'G4' against current Texas Instruments documentation to confirm lead-free status and RoHS compliance details. Confirm package designation PFB corresponds to the 48-lead TQFP variant. Ensure ordering information matches the IB grade specifications for linearity and offset errors.

Analog To Digital Converters (ADC) Selection Notes

Select this component when a 16-bit resolution and 1.25 MSPS sampling rate are required with zero latency. The internal reference simplifies design by eliminating external precision voltage sources. Ensure the application supports a parallel interface and can accommodate the 48-pin TQFP package constraints within the industrial temperature range.

Analog To Digital Converters (ADC) Part Context

This part belongs to the ADS840x family of high-speed ADCs from Texas Instruments. The 'I' indicates an industrial temperature range (-40°C to 85°C), while 'B' denotes the higher accuracy grade with tighter linearity specifications compared to the standard 'I' grade devices in the same series.

Analog To Digital Converters (ADC) Replacement Considerations

Direct pin-compatible replacements within the same family include the ADS8402IPFBT or ADS8402IPFBR for lower accuracy requirements. For upgraded performance, consider the ADS8411 series which offers similar architecture but with different interface options and potentially higher speed capabilities.

Analog To Digital Converters (ADC) FAQ

How is the internal reference configured?

When using the internal 4.096-V reference, connect pin 2 (REFOUT) to pin 1 (REFIN) with a 0.1 µF decoupling capacitor and place a 1 µF storage capacitor between REFOUT and REFM pins.

What is the function of the BYTE pin?

The BYTE pin allows reading the 16-bit conversion result on an 8-bit data bus. When low, DB15-DB8 output the most significant bits; when high, it outputs the least significant bits on the same pins.

What are the power supply requirements?

The analog supply (+VA) requires 4.75 V to 5.25 V. The digital supply (+VBD) accepts 2.95 V to 5.25 V, provided the difference between +VA and +VBD is not less than 2.3 V.