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AD7894ARZ-3REEL
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Product Detailed Parameters
- Description：IC ADC 14BIT SAR 8SOIC
- Series：-
- Mfr：Analog Devices Inc.
- Package：Tape & Reel (TR)
- Number of Bits：14
- Sampling Rate (Per Second)：200k
- 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 AD7894ARZ-3REEL is a 14-bit successive approximation analog-to-digital converter (ADC) housed in an 8-lead SOIC package. It operates from a single +5 V supply and features a serial interface with a maximum clock frequency of 16 MHz. The device includes an on-chip track/hold amplifier and accepts a bipolar input voltage range of -2.5 V to +2.5 V. Typical power consumption is 20 mW, with a maximum conversion time of 5 µs in high sampling mode. It provides a signal-to-noise ratio of 77 dB minimum and supports throughput rates up to 160 kHz.
Feature Summary
- Integrated on-chip track/hold amplifier for accurate signal acquisition
- High-speed two-wire serial interface for data output
- Automatic power-down mode for low-power applications
- Single +5 V supply operation
Applications
- Battery-powered portable instrumentation
- Industrial process control systems
- Data acquisition modules
Procurement Notes
Verify the specific suffix REEL indicates tape and reel packaging when sourcing this component. Confirm that the AD7894-3 designation matches the required -2.5 V to +2.5 V input range for your application. Ensure the external reference voltage connected to REF IN is within the specified 2.375 V to 2.625 V range to maintain accuracy specifications.
Selection Notes
Select this part if a 14-bit resolution and bipolar input range are required in a compact 8-lead package. Compare against the AD7894-10 for wider input ranges or the AD7894-2 for unipolar inputs. Consider the 160 kHz maximum throughput rate and ensure the system timing allows for the necessary read and settling periods between conversions.
Part Context
This component belongs to the AD7894 family of fast, 14-bit ADCs from Analog Devices. It serves as a pin-compatible upgrade to the 12-bit AD7895. The family includes variants with different input ranges (-10 V, -2.5 V, and 0 V to +2.5 V) and temperature grades, all sharing the same core architecture and 8-lead SOIC form factor.
Replacement Considerations
The AD7894BRZ-3 is a verified alternative within the same series offering improved linearity specifications. Other family members like the AD7894ARZ-10 share the same package but require different input scaling.
