AD7911ARMZ-REEL

Overview

The AD7911ARMZ-REEL is a dual-channel, 10-bit successive approximation analog-to-digital converter (ADC) manufactured by Analog Devices. It operates from a single supply voltage ranging from 2.35 V to 5.25 V and supports throughput rates up to 250 kSPS. The device features an on-chip track-and-hold amplifier with a wide input bandwidth capable of handling frequencies exceeding 6 MHz. Power consumption is specified at 4 mW typical at 250 kSPS with 3 V supplies and 13.5 mW typical with 5 V supplies. The part utilizes a flexible serial interface compatible with SPI, QSPI, MICROWIRE, and DSP standards. It includes a standby mode with maximum current consumption of 1 μA.

Feature Summary

• Dual-channel architecture with internal multiplexing for sequential conversion
• Reference derived directly from the power supply to maximize dynamic input range
• Flexible power management with low-power standby mode for efficiency optimization
• Standard successive approximation architecture ensuring no pipeline delays

Applications

• Battery-powered systems such as personal digital assistants
• Medical instruments requiring low power consumption
• Mobile communications equipment
• Instrumentation and control systems
• Data acquisition systems

Procurement Notes

Verify that the ordering suffix REEL corresponds to the tape and reel packaging format required for automated assembly processes. Confirm that the component grade matches the A Grade specification for the operating temperature range of −40°C to +85°C. Ensure compatibility with the MSOP-8 package dimensions during PCB layout design.

Selection Notes

Select this component when a 10-bit resolution is sufficient for the application requirements. Consider the AD7921 variant if 12-bit resolution is necessary, noting the difference in linearity specifications. Evaluate the power supply constraints to ensure operation within the 2.35 V to 5.25 V range. Verify that the serial clock speed requirements align with the 5 MHz maximum limit for optimal throughput performance.

Part Context

This component belongs to the AD7911/AD7921 family of high-speed, low-power ADCs. The AD7911 specifically denotes the 10-bit resolution version, while the AD7921 offers 12-bit resolution. Both share identical pinouts, power supply requirements, and throughput capabilities, differing primarily in accuracy metrics and data word length.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.