AD7949SCPZ-EP-R2

Overview

The AD7949SCPZ-EP-R2 is an enhanced product, 8-channel, 14-bit PulSAR analog-to-digital converter (ADC) from Analog Devices. It operates on a single supply voltage ranging from 2.3 V to 5.5 V with a logic interface of 1.8 V to 5.5 V. The device delivers a throughput of up to 250 kSPS at full bandwidth and features no missing codes. Key electrical specifications include typical integral nonlinearity (INL) of ±0.5 LSB and differential nonlinearity (DNL) of ±0.25 LSB. Signal-to-noise ratio reaches 85 dB at 20 kHz input frequency. Power dissipation is 10.8 mW at 5 V/250 kSPS, with standby current limited to 50 nA. It supports unipolar, differential, and pseudobipolar input configurations.

Feature Summary

• Military-grade reliability with operation specified from -55°C to +125°C and controlled manufacturing baseline.
• Integrated 8-channel multiplexer supporting single-ended, differential, and bipolar input modes.
• Includes selectable internal reference voltages of 2.5 V or 4.096 V alongside an internal temperature sensor.
• Compatible with standard serial interfaces including SPI, MICROWIRE, QSPI, and DSP.

Applications

• Multichannel system monitoring
• Seismic data acquisition systems
• Medical instruments such as ECG/EKG
• Mobile communications GPS modules

Procurement Notes

Verify the specific ordering suffix R2 against the manufacturer's official documentation to confirm tape and reel packaging details. Ensure compatibility with defense and aerospace AQEC standards if required for your project. Cross-reference the pinout and thermal impedance values with the latest datasheet revision B to guarantee correct PCB layout and soldering procedures.

Selection Notes

Select this component when military temperature range and enhanced product change notification are mandatory. Verify that the 14-bit resolution and 250 kSPS throughput meet system requirements. Check power supply constraints, as the device requires 2.3 V minimum for analog operation. Confirm interface compatibility with the host processor's digital logic levels before finalizing the design.

Part Context

This part belongs to the AD7949-EP Enhanced Product family, designed for high-reliability applications. It shares architectural similarities with the commercial AD7949 but offers extended temperature performance and controlled manufacturing. The EP variant is specifically qualified for defense and aerospace environments, distinguishing it from standard industrial grade counterparts in terms of qualification data and traceability.

Replacement Considerations

Direct replacements within the same enhanced product line include the AD7949SCPZ-EP-RL7, which shares identical electrical characteristics and package dimensions. Other family members like the AD7689 offer higher resolution but may differ in channel count or speed. Verify pin compatibility and software register maps when substituting with other PulSAR ADCs.

FAQ

What is the maximum operating temperature for the AD7949SCPZ-EP-R2?

The specified performance temperature range extends from -55°C to +125°C.

Does the device support bipolar input signals?

Yes, the 8-channel multiplexer supports unipolar single-ended, differential, and pseudobipolar input configurations.

How is the standby current managed?

The device draws only 50 nA of standby current when both VDD and VIO are at 5 V and all digital inputs are held at their respective logic levels.