AD7823YRM-REEL7

Overview

The AD7823YRM-REEL7 is an 8-bit successive approximation analog-to-digital converter (ADC) manufactured by Analog Devices. It operates on a single supply voltage ranging from 2.7 V to 5.5 V and features a typical conversion time of 4 µs. The device incorporates inherent track-and-hold functionality with a pseudo-differential input structure. It utilizes a high-speed serial interface compatible with standard microcontrollers, supporting SCLK, CONVST, and DOUT signals. Key performance metrics include a signal-to-noise ratio of 48 dB minimum, differential nonlinearity of ±0.5 LSB maximum, and integral nonlinearity of ±0.5 LSB maximum. Power consumption varies significantly based on throughput, ranging from 17.5 mW in continuous mode to as low as 540 µW at 10 kSPS using automatic power-down.

Feature Summary

• Inherent track-and-hold functionality eliminates the need for external sampling capacitors.
• Automatic power-down mode significantly reduces average power consumption at lower throughput rates.
• Microcontroller-compatible serial interface requires no external logic for connection.
• Pseudo-differential input architecture allows for system offset cancellation.

Applications

• Battery-powered test equipment requiring 8-bit accuracy
• Hand-held portable applications with space constraints
• Battery-powered communications systems

Procurement Notes

Verify the specific ordering suffix REEL7 confirms tape-and-reel packaging when sourcing. Confirm the Y version designation indicates the specified temperature range of -40°C to +125°C. Ensure compatibility with the required serial protocol timing before finalizing procurement.

Selection Notes

Select this component when an 8-bit resolution is sufficient for the application's accuracy requirements. Consider the automatic power-down feature if battery life is critical and throughput rates are variable. Verify that the source impedance of the analog input signal is low enough to meet the 100 ns acquisition time specification.

Part Context

The AD7823 is part of Analog Devices' family of low-power, high-speed ADCs. It serves as a cost-effective solution for applications needing moderate resolution and speed. The YRM variant specifically denotes the microSOIC package option within the broader AD7823 product line.

Replacement Considerations

The AD7810 is documented as a drop-in upgrade offering 10-bit resolution within the same package footprint. Verify pin compatibility and software adjustments for increased resolution before substituting.