AD7898AR-3REEL

Overview

The AD7898AR-3REEL is a 12-bit successive approximation analog-to-digital converter housed in an 8-lead SOIC package. It operates from a single 5 V supply and achieves throughput rates up to 220 kSPS. The device features an on-chip track/hold amplifier and accepts bipolar input voltage ranges of ±2.5 V. It includes a flexible high-speed serial interface compatible with 3 V processors via the VDRIVE pin. Maximum power dissipation is 22.5 mW, with a low-power shutdown mode drawing only 5 µA at 25°C.

Feature Summary

• Integrated signal scaling for direct connection to ±2.5 V analog sources without external attenuation circuitry.
• Dual-mode serial interface supporting internal clocking or external SCLK control for data access during conversion.
• VDRIVE logic supply pin enabling direct interfacing with 3 V digital systems while maintaining 5 V analog operation.

Applications

• Portable instrumentation requiring low power consumption and single-supply operation
• Industrial process control systems utilizing bipolar sensor signals
• Data acquisition modules interfacing with 3 V microprocessors

Procurement Notes

Verify that the specific ordering suffix matches the required packaging format and lead-free status. Confirm the temperature range and linearity specifications align with system requirements before finalizing procurement orders.

Selection Notes

Select this component when a 12-bit resolution and 220 kSPS sampling rate are required within an 8-lead footprint. Ensure the analog input signal falls within the ±2.5 V range defined by the -3 suffix variant.

Part Context

This part belongs to the AD7898 family of fast serial ADCs. It shares architectural similarities with the AD7894 and AD7895 but offers distinct input range options and power characteristics tailored for compact, battery-operated designs.

Replacement Considerations

The AD7898AR-3REEL7 serves as a reel-based alternative with identical electrical specifications. Verify package compatibility and thermal performance when substituting between tape-and-reel formats.