AD7893SQ-5

Overview

The AD7893SQ-5 is a 12-bit successive approximation analog-to-digital converter (ADC) fabricated in LC2MOS technology. It operates from a single +5 V supply and features an on-chip track/hold amplifier, internal clock, and high-speed serial interface. The device accepts a unipolar analog input range of 0 V to +5 V with a typical power dissipation of 25 mW. It provides a conversion time of 6 μs and supports throughput rates up to 117 kHz. The part is housed in an 8-pin hermetic ceramic dual-in-line package (Q-8) and is rated for an extended operating temperature range of –55 °C to +125 °C.

Feature Summary

• Single +5 V supply operation with low power consumption suitable for battery-powered applications
• Integrated on-chip track/hold amplifier and laser-trimmed clock oscillator
• High-speed two-wire serial interface for easy microcontroller connection
• Extended industrial temperature rating for harsh environments

Applications

• Industrial process control systems requiring extended temperature stability
• Portable instrumentation powered by single-cell batteries
• Data acquisition modules utilizing serial communication protocols

Procurement Notes

Verify the specific ordering suffix SQ-5 to confirm the hermetic Q-8 package and extended temperature range. Ensure the external reference voltage matches the specified +2.5 V nominal requirement for optimal linearity. Confirm that the application environment remains within the absolute maximum ratings for voltage and thermal stress.

Selection Notes

Select this model when a hermetic package is required for reliability in extreme temperatures. The SQ-5 variant specifically addresses the –55 °C to +125 °C range compared to commercial versions. Verify that the 0 V to +5 V input range aligns with the sensor signal levels. Consider the 8-pin footprint constraints against alternative multi-channel solutions if higher channel density is needed.

Part Context

This component belongs to the AD7893 family of fast 12-bit ADCs. The family includes variants with different input ranges such as ±10 V, ±2.5 V, and 0 V to +2.5 V. The SQ-5 designation indicates the specific combination of the 0 V to +5 V input range, the hermetic ceramic package, and the extended military-grade temperature classification.

Replacement Considerations

AD7893ARZ-5

FAQ

What is the output coding format for the AD7893SQ-5?

The AD7893SQ-5 uses straight (natural) binary output coding.

How is the conversion cycle initiated?

Conversion is initiated on the rising edge of the CONVST input pin.

What is the minimum acquisition time required between conversions?

A minimum of 600 ns should be allowed after the read operation before initiating the next conversion to optimize performance.