AD7823YNZ

Overview

The AD7823YNZ 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 features a pseudo-differential input structure with inherent track-and-hold functionality. The device utilizes a high-speed serial interface compatible with standard microcontrollers, requiring no external logic for data transfer. Key electrical specifications include a maximum sampling rate of 133 kSPS, a signal-to-noise ratio of 48 dB minimum, and a power dissipation of 17.5 mW at nominal supplies. It is housed in an 8-lead plastic dual-in-line package and is specified for operation across a temperature range of –40°C to +125°C.

Feature Summary

• Inherent track-and-hold functionality eliminates the need for external hold capacitors.
• Automatic power-down mode significantly reduces average power consumption at lower throughput rates.
• Microcontroller-compatible serial interface allows direct connection without additional glue logic.
• Pseudo-differential input architecture enables offset cancellation within the system.

Applications

• Battery-powered test equipment requiring low power consumption.
• Portable handheld devices needing compact ADC solutions.
• Battery-powered communications systems.

Procurement Notes

Verify the specific ordering suffix 'YNZ' against current manufacturer documentation to confirm package type and linearity error specifications. Ensure that the component meets the required environmental temperature range for the intended application. Cross-reference the datasheet revision date to confirm parameter validity before finalizing procurement decisions.

Selection Notes

Select this component when an 8-bit resolution and moderate speed are sufficient for the application. Consider the automatic power-down feature if battery life is critical. Verify that the source impedance of the analog input signal is low enough to meet the acquisition time requirements. Ensure the microcontroller interface supports the required serial clock timing constraints.

Part Context

The AD7823 belongs to the AD7823 series of 8-bit ADCs from Analog Devices. It is designed as a space-saving solution, integrating the converter, reference, and serial interface into a small 8-lead package. The part serves as a cost-effective alternative for applications previously using parallel ADCs or requiring higher resolution than basic 6-bit converters but not needing 12-bit precision.

Replacement Considerations

The AD7810 is documented as a drop-in upgrade option offering 10-bit resolution while maintaining similar form factors. Verify pin compatibility and software adjustments when substituting with other members of the AD78xx family.