AD7898AR-10REEL7

Overview

The AD7898AR-10REEL7 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 supports a maximum throughput rate of 220 kSPS. The device features an on-chip track/hold amplifier and accepts an analog input voltage range of ±10 V. It utilizes a flexible three-wire serial interface compatible with both 3 V and 5 V logic systems via the VDRIVE pin. Key dynamic performance specifications include a minimum Signal to (Noise + Distortion) Ratio of 71 dB and a Total Harmonic Distortion of -78 dB max at a 30 kHz input frequency.

Feature Summary

• Integrated signal scaling allows direct interfacing with ±10 V analog signals while operating from a single 5 V supply.
• Dual-mode serial interface supports internal clocking for simplified control or external clocking for power-down capabilities.
• VDRIVE pin enables the digital interface to operate independently at 3 V or 5 V levels regardless of the main supply voltage.

Applications

• Portable instrumentation requiring low power consumption
• Industrial process control data acquisition
• Battery-powered measurement devices

Procurement Notes

Verify that the specific ordering suffix matches the required packaging format, as REEL7 indicates tape and reel configuration. Confirm RoHS compliance status if lead-free requirements are mandatory for the assembly process. Ensure the temperature grade corresponds to the application environment, as the A version specifies operation between -40°C and +85°C.

Selection Notes

Select this component when a high-speed 12-bit conversion is needed within a compact 8-lead footprint. The AD7898-10 variant is appropriate for applications requiring a wide ±10 V input range without external attenuation circuitry. Consider the power-down mode availability if extending battery life in intermittent sampling applications is a priority.

Part Context

This part belongs to the AD7898 family of fast, low-power ADCs manufactured by Analog Devices. The series includes variants with different input ranges, such as the AD7898-3 which supports ±2.5 V inputs. All members share the same core architecture, package style, and interface protocols, differing primarily in analog front-end scaling and specific ordering suffixes.

Replacement Considerations

The AD7898AR-3 serves as a functional substitute within the same package if the system design accommodates a reduced ±2.5 V input range instead of ±10 V. Other members of the AD7898 family may be considered for pin-compatible upgrades or downgrades depending on specific input voltage requirements.