AD7810YRM

Overview

The AD7810YRM is a 10-bit successive approximation analog-to-digital converter (ADC) housed in an 8-lead microSOIC package. It operates on a single supply voltage ranging from 2.7 V to 5.5 V and features a conversion time of 2.3 µs maximum. The device includes inherent track-and-hold functionality and a pseudo-differential analog input. Data is transmitted via a high-speed serial interface compatible with standard SPI protocols. Power consumption varies by throughput rate, reaching 270 µW at 10 kSPS in automatic power-down mode.

Feature Summary

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

Applications

• Battery-powered test equipment requiring 10-bit accuracy
• Portable handheld instrumentation systems
• Battery-operated communications devices

Procurement Notes

Verify the specific ordering suffix RM corresponds to the 8-lead microSOIC package variant when sourcing components. Confirm that the Y version meets the required linearity specifications of ±1 LSB across the full industrial temperature range. Ensure supply voltage constraints align with the 2.7 V to 5.5 V operational limits defined in the datasheet.

Selection Notes

Select this component for applications prioritizing low power consumption and small footprint over ultra-high speed. The automatic power-down feature makes it suitable for battery-operated devices where duty cycles allow for wake-up latency. Consider source impedance requirements, as high impedance inputs may degrade acquisition time and dynamic performance.

Part Context

The AD7810 series includes variants such as the AD7810YN (Plastic DIP) and AD7810YR (SOIC). The AD7810YRM specifically denotes the microSOIC package option. All variants share identical electrical characteristics and pinouts, differing only in physical packaging dimensions and thermal properties.

Replacement Considerations

Direct pin-compatible replacements within the same family include the AD7810YR and AD7810YN. Verify package compatibility during substitution to ensure mechanical fit within the existing PCB layout.

FAQ

How does the AD7810 achieve low power consumption?

The device utilizes an automatic power-down mode where it powers down immediately after conversion ends. It wakes up upon the next CONVST pulse, reducing average power significantly at lower throughput rates.

What is the function of the VIN- pin?

VIN- serves as the negative input for the pseudo-differential analog input pair. In single-ended applications, it is typically connected to AGND, but it can also be used to cancel system offsets.

Can the serial interface operate while the device is powered down?

Yes, the serial port remains functional even when the ADC core is in power-down mode, allowing data retrieval or configuration if supported by the specific interface timing.