AD7912ARMZ-REEL7

Overview

The AD7912ARMZ-REEL7 is a dual-channel, 10-bit successive approximation analog-to-digital converter manufactured by Analog Devices Inc. It operates from a single 2.35 V to 5.25 V supply and supports throughput rates up to 1 MSPS. The device features an on-chip track-and-hold amplifier with a full power bandwidth of 8.5 MHz at 3 dB. Key electrical parameters include a maximum conversion time of 777 ns, a typical signal-to-noise ratio of 61 dB, and a maximum integral nonlinearity error of ±0.5 LSB. Power consumption reaches 20 mW maximum in normal operational mode at 5 V.

Feature Summary

• Dual-channel architecture with integrated multiplexer for sequential single-ended input acquisition
• Flexible serial interface compatible with SPI, QSPI, MICROWIRE, and DSP protocols
• Daisy-chain capability allowing multiple devices to be connected for expanded system data retrieval
• Internal reference derived directly from the VDD supply rail to maximize dynamic input range

Applications

• Battery-powered portable systems such as personal digital assistants and mobile communications equipment
• Medical instrumentation requiring low power consumption and high-speed data acquisition
• Industrial control and data acquisition systems utilizing microprocessor or DSP interfaces
• High-speed modems and optical sensor signal processing applications

Procurement Notes

Verify the specific package variant upon ordering, as the AD7912 series is available in both MSOP and TSOT configurations. Confirm that the REEL7 suffix corresponds to the required tape and reel quantity for your manufacturing line. Ensure compatibility with standard surface-mount assembly processes for the selected 8-lead package type.

Selection Notes

Select this component when a 10-bit resolution is sufficient for the application's accuracy requirements. It is suitable for designs needing two independent single-ended inputs without external multiplexing circuitry. Consider the AD7922 if higher 12-bit resolution is necessary, while maintaining similar pinouts and interface characteristics.

Part Context

This part belongs to the AD7912/AD7922 family of high-speed, low-power ADCs from Analog Devices. These devices are designed for space-constrained applications, offering significant size reduction compared to discrete solutions. The family shares identical pinouts and software compatibility, facilitating easy upgrades between 10-bit and 12-bit resolutions within the same hardware footprint.

Replacement Considerations

The AD7922 serves as a direct functional replacement if 12-bit resolution is acceptable. Other members of the AD79xx series may offer alternative packaging or interface options but require verification of pinout and timing compatibility.