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AD7949SCPZ-EP-RL7
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Product Detailed Parameters
- Description：IC ADC 14BIT SAR 20LFCSP
- Series：PulSAR®
- Mfr：Analog Devices Inc.
- Package：Tape & Reel (TR),Cut Tape (CT)
- Number of Bits：14
- Sampling Rate (Per Second)：250k
- Number of Inputs：8
- Input Type：Differential, Pseudo-Differential, Single Ended
- Data Interface：SPI, DSP
- Configuration：MUX-S/H-ADC
- Ratio - S/H:ADC：1:01
- Number of A/D Converters：1
- Architecture：SAR
- Reference Type：External, Internal
- Voltage - Supply, Analog：2.3V ~ 5.5V
- Voltage - Supply, Digital：2.3V ~ 5.5V
- Features：Temperature Sensor
- Operating Temperature：-55°C ~ 125°C
- Package / Case：20-WFQFN Exposed Pad, CSP
- Supplier Device Package：20-LFCSP (4x4)
- Mounting Type：Surface Mount
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Overview
The AD7949SCPZ-EP-RL7 is an enhanced product, 8-channel, 14-bit successive approximation register (SAR) analog-to-digital converter. It operates from a single supply of 2.3 V to 5.5 V with a logic interface range of 1.8 V to 5.5 V. The device achieves a throughput of 250 kSPS at full bandwidth and includes an internal selectable reference of 2.5 V or 4.096 V. Key performance metrics include a typical signal-to-noise ratio of 85 dB and total harmonic distortion of −100 dB. It features a 20-lead LFCSP package and supports military temperature ranges from −55°C to +125°C.
Feature Summary
- Military-grade reliability supporting defense and aerospace applications under AQEC standards.
- Integrated 8-channel multiplexer with configurable unipolar, differential, and bipolar input modes.
- Low power consumption with standby current of 50 nA and no pipeline delay architecture.
Applications
- Seismic data acquisition systems
- Medical instruments such as ECG/EKG
- Multichannel system monitoring
Procurement Notes
Verify the specific ordering suffix RL7 corresponds to the 7-inch tape and reel packaging configuration. Confirm that the EP designation indicates the controlled manufacturing baseline required for the intended application environment. Ensure compatibility with the specified voltage levels before finalizing procurement orders.
Selection Notes
Select this component when high channel count and wide temperature operation are required. The internal reference simplifies design by reducing external component count. Verify that the 14-bit resolution meets the system accuracy requirements. Consider the LFCSP package size constraints during PCB layout planning.
Part Context
This part belongs to the AD7949-EP Enhanced Product family designed for harsh environments. It shares architectural similarities with standard commercial variants but offers extended temperature specifications and controlled manufacturing processes. The EP suffix denotes the enhanced product status within the Analog Devices portfolio.
Replacement Considerations
Standard AD7949BCPZ-RL7 lacks the military temperature range and AQEC compliance. Direct functional substitutes must be verified against the specific pinout and timing requirements of the 20-lead LFCSP package.
FAQ
What is the maximum operating temperature for this component?
The specified performance temperature range extends up to +125°C.
Does the device support bipolar input configurations?
Yes, the multiplexer allows for unipolar single-ended, differential, and pseudobipolar input configurations.
How is the exposed pad handled in the package?
The exposed pad is not connected internally but should be soldered to the system ground plane for increased reliability.
