AD7918WYRUZ-REEL7

Overview

The AD7918WYRUZ-REEL7 is an 8-channel, 10-bit successive approximation analog-to-digital converter (ADC) housed in a 20-lead TSSOP package. It operates from a single 2.7 V to 5.25 V supply with a maximum throughput rate of 1 MSPS. The device features eight single-ended inputs managed by a channel sequencer and includes a wide bandwidth track-and-hold amplifier capable of handling input frequencies exceeding 8 MHz. Power dissipation reaches 13.5 mW max at 5 V and 6.0 mW max at 3 V during operation. It supports SPI/QSPI/MICROWIRE/DSP interfaces and offers a full shutdown mode consuming 0.5 μA max.

Feature Summary

• Eight single-ended analog inputs with integrated channel sequencer for preprogrammed sequential conversion.
• Flexible power management with auto shutdown and full shutdown modes to minimize current consumption.
• VDRIVE function allows the serial interface to connect directly to 3 V or 5 V processor systems independent of AVDD.
• No pipeline delays associated with the standard successive approximation conversion process.

Applications

• Industrial process control systems requiring multi-channel data acquisition.
• Battery-powered instrumentation benefiting from low power consumption and shutdown modes.
• Automotive applications qualified under AEC-Q100 standards.
• Data acquisition modules interfacing with microprocessors or DSPs via high-speed serial interfaces.

Procurement Notes

Verify the specific suffix WYRUZ against official Analog Devices documentation to confirm automotive qualification status and temperature range specifications. Ensure the reel packaging matches the required quantity for production needs. Cross-reference the datasheet revision E parameters with the ordered component lot to guarantee compliance with dynamic performance metrics such as SINAD and SNR.

Selection Notes

Select this component when an 8-channel multiplexed ADC with 10-bit resolution and 1 MSPS throughput is required. The AD7918 is suitable for designs needing a wide input bandwidth track-and-hold amplifier and flexible logic voltage levels via the VDRIVE pin. Consider the automotive qualification if operating within extended temperature ranges up to +125°C.

Part Context

The AD7918 belongs to the AD7908/AD7918/AD7928 family of high-speed, low-power ADCs. While sharing identical pinouts and functional blocks, the AD7918 provides 10-bit resolution, distinguishing it from the 8-bit AD7908 and the 12-bit AD7928. All variants utilize the same 20-lead TSSOP package and support similar serial interface protocols and sequencer operations.

Replacement Considerations

The AD7918BRUZ is a commercial grade equivalent within the same family. For higher resolution requirements, the AD7928 series may be considered, while the AD7908 offers lower resolution. Verify that any substitute maintains the 20-lead TSSOP footprint and compatible serial interface timing specifications.