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AD7856AR-REEL7
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Product Detailed Parameters
- Description：IC ADC 14BIT 8CH 5V 24-SOIC
- Series：-
- Mfr：Analog Devices Inc.
- Package：Bulk
- Number of Bits：14
- Sampling Rate (Per Second)：285k
- Number of Inputs：-
- Input Type：-
- Data Interface：-
- Configuration：-
- Ratio - S/H:ADC：-
- Number of A/D Converters：2
- Architecture：-
- Reference Type：-
- Voltage - Supply, Analog：-
- Voltage - Supply, Digital：-
- Features：-
- Operating Temperature：-40°C ~ 105°C
- Package / Case：24-SOIC (0.295", 7.50mm Width)
- Supplier Device Package：24-SOIC
- Mounting Type：Surface Mount
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Overview
The AD7856AR-REEL7 is a high-speed, low-power 14-bit analog-to-digital converter (ADC) manufactured by Analog Devices Inc. It operates from a single 5 V supply and supports a throughput rate of 285 kSPS. The device features eight single-ended or four pseudo-differential input channels with a sampling range of 0 to VREF. It utilizes a successive approximation register (SAR) architecture and includes self-calibration and system calibration options. Power consumption is typically 60 mW in normal mode, dropping to 2.5 μW in automatic power-down after conversion. The component is housed in a 24-lead SOIC package.
Feature Summary
- Supports flexible serial interface modes compatible with SPI, QSPI, and 8051 microprocessors.
- Includes on-chip self-calibration and system calibration logic for maintaining accuracy over temperature and time.
- Features automatic power-down capability to minimize energy consumption in battery-powered applications.
Applications
- Battery-powered systems such as personal digital assistants and mobile communications devices
- Medical instruments requiring precise signal acquisition
- Instrumentation and control systems
- High-speed modems
Procurement Notes
Verify the specific grade version (A or K) required for your operating temperature range before ordering. Confirm that the REEL7 suffix matches your automated assembly equipment specifications. Ensure the SOIC-24 package dimensions align with your PCB footprint design rules. Check for RoHS compliance status if environmental regulations apply to your manufacturing process.
Selection Notes
Select this component when an 8-channel multiplexed ADC with 14-bit resolution is needed. Consider the 285 kSPS speed sufficient for your bandwidth requirements. Evaluate the need for internal calibration versus external reference stability. Compare power dissipation limits against your thermal management capabilities in the final enclosure design.
Part Context
This part belongs to the AD7856 family of 5 V single-supply ADCs. It shares architectural similarities with other SAR converters but is distinct in its multi-channel configuration and calibration features. It serves as a direct replacement for older discrete multiplexer and ADC combinations in compact designs.
Replacement Considerations
Direct pin-compatible alternatives within the same family include the AD7856ANZ and AD7856ARS. Verify that substitute parts maintain the same 285 kSPS throughput and 14-bit linearity specifications to ensure circuit performance parity.
