AD7898ARZ-10

Overview

The AD7898ARZ-10 is a fast 12-bit successive approximation analog-to-digital converter (ADC) housed in an 8-lead SOIC package. It operates from a single 5 V supply and achieves a throughput rate of up to 220 kSPS. The device features an on-chip track/hold amplifier, an internal clock oscillator, and a high-speed serial interface compatible with 3 V processors via the VDRIVE pin. Designed for bipolar input signals, this specific variant supports an input voltage range of ±10 V. Key performance specifications include a minimum signal-to-noise ratio of 71 dB, a maximum differential nonlinearity of ±0.9 LSB, and a power dissipation of 22.5 mW max.

Feature Summary

• Single 5 V supply operation with low power consumption suitable for battery-powered applications
• Flexible serial interface allowing direct connection to 3 V or 5 V processor systems
• On-chip track/hold amplifier and internal clock oscillator for simplified system design
• Proprietary power-down mode significantly reducing current draw during idle periods

Applications

• Portable data acquisition systems requiring space-saving solutions
• Industrial process control monitoring
• Battery-operated instrumentation
• Hand-held measurement devices

Procurement Notes

Verify the ordering suffix 'Z' indicates lead-free compliance when sourcing replacements. Confirm the '-10' suffix matches the required ±10 V input range specification. Ensure the package type remains 8-lead SOIC for physical compatibility. Check RoHS status against local regulatory requirements before finalizing procurement.

Selection Notes

Select the AD7898ARZ-10 when a ±10 V input range is required alongside a 12-bit resolution. Consider the AD7898ARZ-3 if the application involves lower voltage signals within a ±2.5 V range. Evaluate the need for Mode 0 versus Mode 1 operation based on whether an external clock source is available. Verify that the 220 kSPS throughput meets the system bandwidth requirements.

Part Context

The AD7898 series integrates a 12-bit ADC, track/hold amplifier, and serial interface logic into a compact 8-lead package. This integration reduces board space compared to discrete solutions. The device family includes variants with different input ranges and packaging options, such as reel tape configurations, while maintaining consistent core performance characteristics across the series.

Replacement Considerations

AD7898AR-10REEL serves as a reel-packaged equivalent. AD7898ARZ-3 provides identical functionality but with a reduced ±2.5 V input range.