ADS8380IRHPT

Analog To Digital Converters (ADC) Overview

The ADS8380IRHPT is an 18-bit, 600-kHz sampling analog-to-digital converter (ADC) featuring a pseudo-differential input architecture. It integrates a 4.096-V internal reference and a high-speed CMOS serial interface supporting clock speeds up to 40 MHz. The device utilizes a Successive Approximation Register (SAR) structure with inherent sample-and-hold capabilities. Key performance metrics include a Signal-to-Noise Ratio (SNR) of 91 dB and a Spurious Free Dynamic Range (SFDR) of 119 dB at a 1 kHz input frequency. It operates within an industrial temperature range of -40°C to +85°C and is housed in a 28-lead 6x6 mm QFN package.

Analog To Digital Converters (ADC) Feature Summary

• 18-bit resolution with guaranteed no missing codes over the operating temperature range
• Integrated 4.096-V voltage reference with onboard buffer
• High-speed serial interface compatible with SPI standards up to 40 MHz
• Low power consumption: 115 mW at full throughput, 15 mW in Nap mode, and 10 μW in Power Down

Analog To Digital Converters (ADC) Applications

• Medical instruments
• Optical networking equipment
• Transducer interfaces
• Magnetometer systems
• High-accuracy data acquisition systems

Analog To Digital Converters (ADC) Procurement Notes

Verify the specific linearity grade required for the application. The 'I' suffix denotes the standard industrial grade variant with ±6 LSB max INL and 17-bit guaranteed resolution. This differs from the 'IB' variant which offers ±4 LSB max INL and full 18-bit resolution. Confirm that the Tape and Reel packaging quantity of 250 units aligns with production requirements.

Analog To Digital Converters (ADC) Selection Notes

Select this component when 18-bit precision and 600 kSPS throughput are necessary. Ensure the analog supply (+VA) is maintained between 4.75 V and 5.25 V, while the digital supply (+VBD) can range from 2.7 V to 5.25 V. Consider the internal reference's drift characteristics (25 ppm/°C) or opt for an external reference if higher stability is needed. Verify that the pseudo-differential input range of 0 V to Vref fits the signal source constraints.

Analog To Digital Converters (ADC) Part Context

The ADS8380 belongs to Texas Instruments' High-Speed SAR Converter Family. It serves as the 18-bit pseudo-differential counterpart to the ADS8383 (18-bit pseudo-bipolar) and ADS8381 (16-bit pseudo-differential). It shares architectural similarities with other members like the ADS8371 and ADS8401 but is distinct in its bit depth and input configuration options within the series.

Analog To Digital Converters (ADC) Replacement Considerations

For direct pin-compatible replacements with identical specifications, consider the ADS8380IBRHPT, which offers improved linearity (±4 LSB max INL vs ±6 LSB). For lower resolution needs, the ADS8381 provides a 16-bit alternative. Note that ordering suffixes such as 'RHPR' indicate different reel quantities (1000 units) rather than functional changes.