AD7918BRUZ

Overview

The AD7918BRUZ is a 10-bit, 8-channel 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 a wide bandwidth track-and-hold amplifier capable of handling input frequencies exceeding 8 MHz. Power consumption is specified at 6.0 mW max at 1 MSPS with a 3 V supply and 13.5 mW max at 1 MSPS with a 5 V supply. The serial interface supports SPI, QSPI, MICROWIRE, and DSP protocols, while the shutdown mode draws a maximum of 0.5 μA.

Feature Summary

• Eight single-ended analog inputs managed by a programmable channel sequencer for automated multi-point sampling.
• VDRIVE function enables direct interfacing with 3 V or 5 V processor systems independent of the analog supply voltage.
• Flexible power management allows conversion rate adjustment via serial clock speed and includes auto-shutdown modes for efficiency.
• Standard successive approximation architecture ensures no pipeline delays between sampling and data output.

Applications

• Industrial process control systems requiring multi-channel signal acquisition.
• Data acquisition modules for monitoring environmental or mechanical parameters.
• Battery-powered instrumentation benefiting from low power consumption and shutdown capabilities.

Procurement Notes

Verify the specific suffix against the manufacturer's current ordering guide to confirm packaging type and temperature grade. Ensure the component matches the required automotive or commercial qualification if applicable. Cross-reference the datasheet revision to confirm pinout and electrical specifications align with your design requirements before finalizing procurement.

Selection Notes

Select this component when a balance of moderate resolution and high-speed multi-channel acquisition is required. The AD7918 is suitable for applications needing up to 1 MSPS per channel with minimal latency. Consider the external reference requirement and input range configuration options when designing the analog front end. Evaluate power constraints to determine if the auto-shutdown features meet system efficiency goals.

Part Context

The AD7918 belongs to the AD7908/AD7918/AD7928 family of PulSAR ADCs. This series shares identical pinouts, interfaces, and core architectures, differing primarily in resolution: 8-bit, 10-bit, and 12-bit respectively. The family is designed for high-throughput, low-power applications in a compact 20-lead TSSOP package.

Replacement Considerations

The AD7908BRUZ and AD7928BRUZ are pin-compatible alternatives within the same family, offering 8-bit and 12-bit resolutions respectively. Verify that the resolution difference meets application accuracy needs. Other PulSAR ADCs may require interface or pin modifications.