AD7880CN

Overview

The AD7880CN is a monolithic 12-bit successive-approximation analog-to-digital converter (ADC) operating from a single +5 V supply. It features a throughput rate of 66 kS/s with a conversion time of 12 μs and an acquisition time of 3 μs. The device includes an on-chip track/hold amplifier, versatile parallel interface logic, and multiple-input-range circuitry supporting 0 V to +5 V, 0 V to +10 V, and ±5 V ranges. Key electrical specifications include a signal-to-noise ratio (SNR) of 70 dB, integral nonlinearity (INL) of ±1 LSB, differential nonlinearity (DNL) of ±1 LSB, and full-scale error of ±5 LSB for the C version. Power dissipation is typically 25 mW in normal operation and 2 mW in power save mode.

Feature Summary

• Supports three user-defined input ranges (0V to +5V, 0V to +10V, and ±5V) using only a single +5V supply.
• Integrates a fast track/hold amplifier and SAR ADC architecture for high-speed data acquisition.
• Features low power consumption with a dedicated power save mode for battery-operated applications.
• Provides direct interfacing capability to modern microprocessors and digital signal processors via standard control inputs.

Applications

• Battery powered portable systems
• Digital signal processing
• Speech recognition and synthesis
• High speed modems
• Control and instrumentation

Procurement Notes

Verify the specific suffix 'CN' corresponds to the industrial temperature range (-40°C to +85°C) and plastic DIP package as defined in the ordering guide. Confirm that the component meets RoHS compliance requirements if applicable to your manufacturing standards. Ensure proper ESD handling procedures are followed during assembly due to the sensitivity of the CMOS process.

Selection Notes

Select the AD7880CN when a 12-bit resolution and 66 kHz sampling rate are required for single-supply applications. This model is suitable for designs needing flexible analog input configurations without dual supplies. Consider the C version specifications for tighter DC accuracy limits compared to the B version if system linearity constraints are strict.

Part Context

The AD7880 belongs to Analog Devices' family of low-power, high-speed sampling ADCs fabricated using LC2MOS technology. It is designed to bridge the gap between precision analog performance and digital system integration. The CN variant specifically denotes the industrial temperature grade housed in a standard 24-lead plastic dual-in-line package.

Replacement Considerations

The AD7880BN serves as a functional alternative with identical pinout and specifications but offers looser DC accuracy tolerances (±15 LSB full-scale error). Other variants include AD7880BR and AD7880CR for SOIC packages, and AD7880BQ/AD7880CQ for ceramic DIP packages.