AD7899ARSZ-1REEL7

Overview

The AD7899ARSZ-1REEL7 is a 14-bit successive-approximation analog-to-digital converter (ADC) from Analog Devices, operating on a single 5 V supply. It delivers a maximum throughput rate of 400 kSPS with a conversion time of 2.2 µs and a track/hold acquisition time of 0.3 µs. The device features ±10 V and ±5 V bipolar input ranges, CMOS/TTL parallel outputs, and an internal 2.5 V reference. Typical power consumption is 80 mW in normal mode and 20 µW in standby. It is housed in a 28-lead SOIC package and supports operation across the -40°C to +85°C temperature range.

Feature Summary

• Integrated signal conditioning circuitry allows direct acceptance of ±10 V, ±5 V, ±2.5 V, 0 V to 2.5 V, and 0 V to 5 V input ranges without external scaling components.
• High-speed parallel interface enables data transfer compatible with both 3 V and 5 V logic processors.
• Analog inputs include overvoltage protection, permitting voltage excursions beyond the selected input range without device damage.
• Flexible clocking options allow selection between an internal laser-trimmed oscillator and an external clock source via the CLKIN pin.

Applications

• Industrial process control systems requiring high accuracy and wide input dynamic range.
• Portable instrumentation benefiting from low-power single-supply operation.
• Data acquisition systems interfacing directly with 3 V or 5 V microprocessors.
• Medical equipment utilizing bipolar signal processing capabilities.

Procurement Notes

Verify the specific suffix REEL7 against official documentation to confirm tape-and-reel packaging and quantity specifications. Ensure the ordering code matches the required -40°C to +85°C commercial temperature grade and the ±10 V/±5 V input range variant. Cross-reference the datasheet revision to confirm all electrical parameters align with current manufacturing standards before finalizing procurement orders.

Selection Notes

Select this component when a 14-bit resolution and 400 kSPS throughput are required for bipolar signals. The AD7899-1 variant specifically supports ±10 V and ±5 V ranges. Consider the parallel interface requirements and ensure the system can accommodate the 28-pin SOIC footprint. Verify that the 80 mW typical power dissipation fits within the thermal design constraints of the target application.

Part Context

The AD7899 series comprises fast, low-power 14-bit ADCs designed for versatile industrial applications. The AD7899-1 version specifically targets bipolar input scenarios with ±10 V and ±5 V ranges. This part belongs to a family offering different input configurations, including unipolar and ±2.5 V variants, allowing designers to choose the optimal device based on signal conditioning needs.

Replacement Considerations

The AD7899AR-1 serves as a tube-packaged equivalent with identical electrical characteristics. For military-grade temperature ranges (-55°C to +125°C), the AD7899SR-1 is the verified substitute. Ensure package compatibility and verify that any replacement maintains the same 14-bit resolution and 400 kSPS throughput specifications.