ADS8401IBPFBR

Analog To Digital Converters (ADC) Overview

The ADS8401IBPFBR is a 16-bit, 1.25 MSPS analog-to-digital converter (ADC) from Texas Instruments, housed in a 48-lead TQFP package. It features a unipolar single-ended input range of 0 V to Vref and includes an onboard 4.096-V reference with a buffer. The device utilizes a capacitor-based SAR architecture with zero latency and supports both 8-bit and 16-bit parallel data interfaces. Operating temperatures range from -40°C to +85°C. Key electrical parameters include a typical power dissipation of 155 mW at 1.25 MHz, a signal-to-noise ratio (SNR) of 86 dB, and integral linearity of ±3.5 LSB for the IB grade.

Analog To Digital Converters (ADC) Feature Summary

• 16-Bit Resolution with 1.25 MSPS Throughput Rate
• Onboard 4.096-V Reference with Integrated Buffer
• High-Speed Parallel Interface Supporting 8-/16-Bit Bus Transfer
• Zero Latency Successive Approximation Register (SAR) Architecture

Analog To Digital Converters (ADC) Applications

• DWDM Systems
• Instrumentation
• Medical Instruments
• Transducer Interface
• Communication Equipment

Analog To Digital Converters (ADC) Procurement Notes

Verify the specific suffix 'BR' indicates tape and reel packaging containing 1000 units, distinct from the 'BT' variant which contains 250 units. Confirm that the 'I' designation corresponds to the industrial temperature range of -40°C to +85°C. Ensure compatibility with the required 5-V analog supply and 3-V or 5-V digital supply specifications during sourcing.

Analog To Digital Converters (ADC) Selection Notes

Select the ADS8401IBPFBR when a unipolar input range and integrated reference are required for high-speed data acquisition. The IB grade offers tighter linearity specifications (±3.5 LSB INL) compared to the I grade. Consider the 48-pin TQFP package constraints and the need for a parallel interface when designing the host system. Verify that the source impedance can charge the 25 pF input capacitance within the 150 ns acquisition time.

Analog To Digital Converters (ADC) Part Context

The ADS8401 belongs to the ADS840x family of micro-power sampling ADCs. It shares architectural similarities with the ADS8405 but differs in input configuration; the ADS8401 uses a unipolar single-ended input, whereas other variants may support differential inputs. This component is designed for applications requiring high resolution and speed without external clocking.

Analog To Digital Converters (ADC) Replacement Considerations

The ADS8401IBPFBT is a compatible alternative with identical electrical characteristics, differing only in packaging quantity (250 units per reel versus 1000 units). No other direct pin-compatible substitutes are documented in the provided datasheet.