AD7851ANZ

Overview

The AD7851ANZ is a 14-bit, serial sampling Analog-to-Digital Converter (ADC) manufactured by Analog Devices Inc. It operates from a single 5 V supply and supports a throughput rate of 333 kSPS at the A grade. The device features a pseudo-differential input with two selectable voltage ranges: 0 V to VREF and ±VREF/2. It incorporates system and self-calibration capabilities, including autocalibration on power-up, to maintain accuracy over temperature variations. The ADC utilizes a SAR architecture and communicates via a flexible serial interface compatible with SPI/QSPI standards. It is housed in a 24-lead PDIP package.

Feature Summary

• Integrated self-calibration and system calibration mechanisms ensure high precision across operating temperatures.
• Flexible serial interface supports multiple communication protocols for easy microprocessor integration.
• Dual analog input range selection allows adaptation to various signal levels without external scaling.
• Low power consumption with dedicated sleep mode for energy-efficient applications.

Applications

• Digital Signal Processing systems
• Speech Recognition and Synthesis equipment
• Spectrum Analysis instruments
• DSP Servo Control loops
• Instrumentation and Control Systems

Procurement Notes

Verify the specific grade (A or K) required for your throughput needs, as the ANZ suffix denotes the PDIP package but does not specify the performance grade in the base model name alone. Confirm the temperature range requirements match the A grade (-40°C to +85°C). Ensure that the ordering documentation explicitly states the desired throughput specification corresponding to the selected grade.

Selection Notes

Select the AD7851ANZ when a 14-bit resolution and 333 kSPS throughput are required within a -40°C to +85°C temperature range. Consider this part if a single 5 V supply is available and a pseudo-differential input configuration is acceptable. Evaluate the need for internal calibration versus external reference stability based on the application's long-term accuracy requirements.

Part Context

The AD7851 series represents a family of high-speed, 14-bit serial ADCs from Analog Devices. The AD7851ANZ specifically refers to the A-grade version packaged in a 24-lead Plastic Dual In-line Package (PDIP). Other variants include the K-grade for lower throughput and different packages like SOIC (AR) and SSOP (ARS). This component is part of the broader AD78xx series designed for general-purpose data acquisition.

Replacement Considerations

Public confirmed substitute part numbers are not provided in the verified source material. Users should consult official Analog Devices documentation for current replacement recommendations or cross-reference with other 14-bit SAR ADCs if pin compatibility is not required.