AD7911AUJZ-REEL7

Overview

The AD7911AUJZ-REEL7 is a dual-channel, 10-bit successive approximation analog-to-digital converter (ADC) manufactured by Analog Devices Inc. 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. It utilizes a flexible serial interface compatible with SPI, QSPI, MICROWIRE, and DSP standards. Power consumption is optimized for battery-powered applications, dissipating approximately 4 mW at 250 kSPS with 3 V supplies. The component is housed in an 8-lead TSOT package.

Feature Summary

• Dual-channel architecture with independent channel selection via the DIN pin
• Low power operation with standby mode current of 1 μA maximum
• Internal reference derived from VDD for widest dynamic input range
• No pipeline delays associated with the conversion process

Applications

• Battery-powered personal digital assistants
• Medical instruments
• Mobile communications systems
• Data acquisition systems
• High speed modems

Procurement Notes

Verify the specific ordering suffix REEL7 corresponds to the reel packaging format required for your assembly line. Confirm that the A Grade temperature range of −40°C to +85°C meets your operational environment specifications. Ensure compatibility with the 8-lead TSOT footprint during PCB layout. Cross-reference the datasheet revision A for any updates to electrical characteristics or timing parameters before finalizing the design.

Selection Notes

Select this component when a 10-bit resolution is sufficient for the application, as opposed to the 12-bit AD7921 variant. Consider the AD7911 for designs requiring lower power dissipation compared to higher-resolution counterparts. Verify that the 0 to VDD analog input range aligns with the signal levels present in the system. Ensure the microprocessor interface supports the required serial clock speeds up to 5 MHz for optimal throughput performance.

Part Context

This part belongs to the AD7911/AD7921 family of high-speed, low-power ADCs from Analog Devices. The AD7911 specifically denotes the 10-bit resolution version, while the AD7921 offers 12-bit resolution within the same package and feature set. Both share identical pinouts and serial interface protocols, allowing for potential design flexibility between resolution requirements without changing the physical footprint.

Replacement Considerations

The AD7921AUJZ-REEL7 serves as a direct pin-compatible upgrade offering 12-bit resolution. For single-channel applications, consider the AD7910 series if only one input is required. Ensure that any replacement maintains the 2.35 V to 5.25 V supply range and TSOT-8 package dimensions to fit existing board layouts.