AD7827BN

Overview

The AD7827BN is an 8-bit, single-channel analog-to-digital converter (ADC) manufactured by Analog Devices Inc. It operates from a single 3 V or 5 V supply and achieves a maximum throughput of 1 MSPS with a conversion time of 420 ns. The device integrates a track-and-hold amplifier, a half-flash ADC architecture, and a serial interface compatible with DSPs. It features an on-chip 2.5 V reference with 2% tolerance and automatic power-down capabilities. The input voltage range is 0 V to 2.5 V at 5 V supply or 0 V to 2 V at 3 V supply. It is housed in an 8-lead plastic dual-in-line package.

Feature Summary

• Integrates a high-speed half-flash ADC with an on-chip track-and-hold amplifier for precise signal sampling.
• Features a three-wire serial interface optimized for direct connection to digital signal processors without external logic.
• Includes an internal 2.5 V reference and automatic power-down mode controlled by the CONVST pin state.

Applications

• High-speed data acquisition systems requiring low power consumption
• Digital signal processing interfaces utilizing continuous serial clock protocols
• Battery-powered instrumentation benefiting from automatic power-down modes

Procurement Notes

Verify the specific ordering suffix 'BN' corresponds to the plastic DIP N-8 package variant when sourcing components. Confirm that the required operating temperature range aligns with the industrial specification limits defined in the datasheet. Ensure supply voltages remain within the specified tolerances to maintain performance accuracy.

Selection Notes

Select this component for applications requiring an 8-bit resolution at 1 MSPS throughput with minimal external circuitry. Consider the integrated reference and track-and-hold features if board space is constrained. Evaluate the serial interface compatibility with the target microcontroller or DSP before finalizing the design.

Part Context

The AD7827 series includes variants such as the AD7827BR in an SOIC package. The BN designation specifically identifies the plastic dual-in-line package version. This part belongs to the broader family of high-speed, low-power analog-to-digital converters designed for embedded control and measurement applications.

Replacement Considerations

The AD7827BR serves as a package alternative offering identical electrical specifications in a small outline IC format. Verify pinout compatibility and thermal requirements when substituting between package types.