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AD7893AR-2REEL7
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Product Detailed Parameters
- Description：IC ADC 12BIT SAR 8SOIC
- Series：-
- Mfr：Analog Devices Inc.
- Package：Tape & Reel (TR)
- Number of Bits：12
- Sampling Rate (Per Second)：117k
- Number of Inputs：1
- Input Type：Single Ended
- Data Interface：SPI
- Configuration：S/H-ADC
- Ratio - S/H:ADC：1:01
- Number of A/D Converters：1
- Architecture：SAR
- Reference Type：External
- Voltage - Supply, Analog：5V
- Voltage - Supply, Digital：5V
- Features：-
- Operating Temperature：-40°C ~ 85°C
- Package / Case：8-SOIC (0.154", 3.90mm Width)
- Supplier Device Package：8-SOIC
- Mounting Type：Surface Mount
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Overview
The AD7893AR-2REEL7 is a 12-bit successive approximation analog-to-digital converter (ADC) manufactured by Analog Devices Inc. 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 input voltage range of 0 V to +2.5 V with a typical power dissipation of 25 mW. Key electrical parameters include a maximum conversion time of 6 μs, a throughput rate up to 117 kHz, and a signal-to-noise ratio of 70 dB. It utilizes straight binary output coding and requires an external +2.5 V reference.
Feature Summary
- Integrated on-chip track/hold amplifier for accurate signal acquisition
- High-speed two-wire serial interface for simplified microcontroller connection
- Single +5 V supply operation with low power consumption
- Internal laser-trimmed clock oscillator eliminates external timing components
Applications
- Battery-powered portable instrumentation systems
- Industrial process control data acquisition
- Medical equipment signal conditioning
- Automotive sensor interfaces
Procurement Notes
Verify the specific suffix REEL7 indicates tape-and-reel packaging when sourcing. Confirm the -2 designation corresponds to the 0 V to +2.5 V input range. Ensure compatibility with existing board layouts using the SOIC-8 package dimensions. Check for RoHS compliance status if required by local regulations.
Selection Notes
Select this component when a compact 12-bit ADC with a narrow unipolar input range is required. The AD7893AR-2 is suitable for applications where the input signal does not exceed 2.5 V. Consider the AD7893AR-5 if a wider 0 V to +5 V range is needed without changing the package type.
Part Context
This part belongs to the AD7893 family of fast 12-bit ADCs. The family includes variants with different input ranges (-10, -3, -5, -2) and temperature grades (A, B, S). The AR-2 variant specifically targets low-voltage unipolar applications within the commercial temperature range.
Replacement Considerations
The AD7893BR-2 offers improved linearity specifications while maintaining pin compatibility. For higher resolution requirements, consider the 14-bit AD7894 series, though it may require software adjustments for the increased word length.
