AD7999WYRJZ-1RL

Overview

The AD7999WYRJZ-1RL is an 8-bit, 4-channel successive approximation analog-to-digital converter (ADC) from Analog Devices. It features an I2C-compatible serial interface and operates on a single 2.7 V to 5.5 V supply. The device includes a track-and-hold amplifier supporting input frequencies up to 14 MHz and offers a typical conversion time of 1 µs. It is housed in an 8-lead SOT-23 package and supports standard, fast, and high-speed I2C modes. Key electrical parameters include a full-power bandwidth of 14 MHz, integral nonlinearity of ±0.15 LSB, differential nonlinearity of ±0.13 LSB, and gain error of ±0.175 LSB.

Feature Summary

• Four single-ended analog input channels with integrated multiplexer
• I2C-compatible serial interface supporting standard, fast, and high-speed modes
• Automatic shutdown mode for low power consumption
• Reference derived from power supply or external reference input

Applications

• System monitoring
• Battery-powered systems
• Data acquisition
• Medical instruments

Procurement Notes

Verify the specific ordering suffix against official documentation to confirm pinout and electrical characteristics. Confirm that the component meets required automotive qualification standards if applicable. Ensure compatibility with existing I2C bus addressing schemes, as this variant utilizes a fixed address configuration distinct from other family members.

Selection Notes

Select this component when an 8-bit resolution is sufficient for the application requirements. Consider the 14 MHz full-power bandwidth for high-frequency signal processing needs. Evaluate the I2C interface constraints regarding bus speed and clock stretching capabilities. Compare power dissipation figures against system thermal limits during active conversion cycles.

Part Context

This part belongs to the AD7991/AD7995/AD7999 family of low-power ADCs. While sharing the same package and interface, it differs from the AD7991 (12-bit) and AD7995 (10-bit) in resolution and accuracy specifications. The W version denotes industrial temperature range performance within the specified operating conditions.

Replacement Considerations

Direct substitutes within the same package and interface include the AD7991 and AD7995, provided higher resolution is acceptable. Verify I2C address compatibility, as the AD7999 uses a unique address compared to the dual-address versions of the AD7991 and AD7995.