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AD7894AR-2
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Product Detailed Parameters
- Description：IC ADC 14BIT SRL T/H LP 8-SOIC
- Series：-
- Mfr：Analog Devices Inc.
- Package：Bulk
- Number of Bits：14
- Sampling Rate (Per Second)：200k
- Number of Inputs：-
- Input Type：-
- Data Interface：-
- Configuration：-
- Ratio - S/H:ADC：-
- Number of A/D Converters：1
- Architecture：-
- Reference Type：-
- Voltage - Supply, Analog：-
- Voltage - Supply, Digital：-
- 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 AD7894AR-2 is a 14-bit successive approximation analog-to-digital converter housed in an 8-lead SOIC package. It operates from a single +5 V supply and features a serial interface with a conversion time of 5 µs. The device accepts a unipolar input voltage range of 0 V to +2.5 V and utilizes straight binary output coding. Key electrical specifications include a signal-to-noise ratio of 77 dB, a differential nonlinearity of ±1.5 LSB, and an integral nonlinearity of ±2 LSB. Typical power consumption is 20 mW, with a maximum of 27.5 mW.
Feature Summary
- Integrated on-chip track/hold amplifier for high-speed sampling
- Two-wire serial interface compatible with standard logic levels
- Automatic power-down mode for low-power applications
Applications
- Battery-powered portable instrumentation
- Industrial process control systems
- Data acquisition modules
Procurement Notes
Verify the specific suffix AR-2 confirms the unipolar 0 V to +2.5 V input range and straight binary coding. Confirm the operating temperature range matches the application requirements. Ensure the external reference voltage is set to +2.5 V for optimal performance. Check RoHS compliance status if required by local regulations.
Selection Notes
Select this component when a 14-bit resolution is required within a compact 8-lead package. The unipolar input range suits single-supply sensor interfaces. Consider the 5 µs conversion time against system throughput needs. Verify that the serial clock frequency supports the desired data rate without violating setup times.
Part Context
This part belongs to the AD7894 family of fast, low-power ADCs. It serves as a pin-compatible upgrade to the 12-bit AD7895. The family includes variants with different input ranges, such as bipolar options like the AD7894-3 and AD7894-10.
Replacement Considerations
The AD7894BR-2 is available as a higher accuracy version within the same package. Other family members like the AD7894-3 or AD7894-10 offer different input ranges but require circuit adjustments.
