AD7858ANZ

Overview

The AD7858ANZ is a high-speed, low-power 12-bit analog-to-digital converter (ADC) manufactured by Analog Devices Inc. It operates from a single 3 V to 5.5 V supply and features an 8-channel multiplexer supporting eight single-ended or four pseudo-differential inputs. The device utilizes a successive approximation register (SAR) architecture with a throughput rate of 200 kSPS. It includes system and self-calibration capabilities to maintain accuracy over temperature and time variations. The ADC communicates via a flexible serial interface compatible with SPI, QSPI, and 8051 microprocessors. It is housed in a 24-lead plastic dual-in-line package (DIP).

Feature Summary

• System and self-calibration with automatic power-up calibration.
• Flexible serial interface compatible with SPI, QSPI, and 8051 protocols.
• Low power consumption with automatic power-down after conversion.
• Eight single-ended or four pseudo-differential input channels.

Applications

• Battery-powered systems such as personal digital assistants and mobile communications.
• Medical instruments requiring precise signal acquisition.
• Instrumentation and control systems.
• High-speed modems.

Procurement Notes

Verify the specific suffix 'N' indicates the 24-lead Plastic DIP package configuration. Confirm that the component meets RoHS compliance standards for the intended manufacturing process. Ensure the operating voltage range aligns with the 3 V to 5.5 V specification provided in the datasheet. Check for any end-of-life notices regarding this specific package variant.

Selection Notes

Select the AD7858ANZ when a through-hole DIP package is required for prototyping or specific board layouts. Choose this model over the AD7858L variants if the higher 200 kSPS throughput rate is necessary for the application. Ensure the design accommodates the slightly higher power dissipation compared to the low-power L-series versions.

Part Context

The AD7858ANZ belongs to the AD7858 family of 12-bit sampling ADCs. This family distinguishes between standard speed models like the AD7858 and low-power models like the AD7858L. The 'A' grade specifies the commercial temperature range, while the 'N' suffix denotes the specific 24-lead plastic dual-in-line package format used for this part number.

Replacement Considerations

The AD7858BNZ is a parameter-equivalent replacement within the same package offering improved linearity error specifications. For applications prioritizing lower power consumption over maximum speed, the AD7858LANZ serves as a functional alternative within the same package type.