AD7819YNZ

Overview

The AD7819YNZ is an 8-bit successive approximation analog-to-digital converter (ADC) manufactured by Analog Devices Inc. It operates on a single supply voltage ranging from 2.7 V to 5.5 V and supports a maximum throughput of 200 kSPS with a conversion time of 4.5 µs. The device features an on-chip track-and-hold circuit, an internal clock oscillator, and an 8-bit parallel interface compatible with microprocessors and DSPs. It is housed in a 16-lead plastic dual-in-line package (PDIP). DC accuracy specifications include a differential nonlinearity (DNL) and integral nonlinearity (INL) of ±0.5 LSB, with a gain error of ±0.5 LSB. Power consumption is 17.5 mW max at 5 V during normal operation.

Feature Summary

• Integrated automatic power-down mode that reduces average power consumption significantly at lower sampling rates by powering down between conversions.
• On-chip track-and-hold amplifier and clock oscillator eliminate the need for external timing components or acquisition buffers.
• Microprocessor-compatible 8-bit wide parallel interface allows direct connection to standard digital buses with minimal address decoding logic.

Applications

• Battery-powered instrumentation systems requiring low power consumption at moderate sampling rates.
• Industrial process control applications utilizing microcontroller-based data acquisition architectures.
• Portable measurement devices interfacing directly with DSPs via parallel data buses.

Procurement Notes

Verify the specific ordering suffix 'YNZ' corresponds to the PDIP-16 package variant when sourcing. Confirm RoHS compliance status through official manufacturer documentation prior to integration. Ensure ESD precautions are observed during handling due to the sensitivity of the CMOS input structures. Cross-reference the datasheet revision to confirm pinout consistency with existing design files.

Selection Notes

Select this component for applications requiring an 8-bit resolution with a maximum sampling rate of 200 kSPS. It is suitable for designs where a parallel interface is preferred over serial alternatives to simplify software drivers. Consider the automatic power-down feature if battery life is critical and the average throughput is below 100 kSPS. Verify that the source impedance of the analog input signal is low enough to meet the 100 ns acquisition time requirement.

Part Context

The AD7819 belongs to the AD7819 series of high-speed, low-power ADCs from Analog Devices. It is designed as a standalone solution for general-purpose data acquisition tasks. The device complements other members of the family which may offer different resolutions or interface types, providing a cost-effective option for systems needing moderate speed and parallel connectivity.

Replacement Considerations

Direct replacements within the same package and specification profile should be verified against the current Analog Devices product selection guide. Alternative packages such as SOIC or TSSOP variants exist but require physical footprint adaptation. Serial interface ADCs from the same manufacturer may serve as functional substitutes if software architecture changes are permissible.