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AD7894BR-3REEL
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Product Detailed Parameters
- Description：IC ADC 14BIT SAR 8SOIC
- Series：-
- Mfr：Analog Devices Inc.
- Package：Tape & Reel (TR),Cut Tape (CT)
- 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
- Grade：-
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Overview
The AD7894BR-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 bipolar input voltage range of -2.5 V to +2.5 V. The device includes an on-chip track/hold amplifier, internal clock, and high-speed serial interface. Key electrical specifications include a maximum conversion time of 5 µs in Mode 1 operation, a typical power dissipation of 20 mW, and a signal-to-noise ratio of 77 dB minimum. It supports throughput rates up to 160 kHz with a serial clock frequency of 16 MHz.
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 requiring 14-bit resolution
Procurement Notes
Verify the specific suffix 'REEL' indicates tape-and-reel packaging when sourcing components. Confirm that the 'B' version meets the required linearity specifications for your application. Ensure the external reference voltage matches the specified +2.5 V requirement for optimal performance.
Selection Notes
Select this component if a 14-bit resolution with a bipolar -2.5 V to +2.5 V input range is required. Consider the 8-lead SOIC package size for space-constrained designs. Evaluate the 5 µs conversion time against system throughput requirements to ensure compatibility with the desired sampling rate.
Part Context
This part belongs to the AD7894 family of fast, 14-bit ADCs. The 'B' designation indicates a specific grade of linearity accuracy compared to the 'A' version. The 'REEL' suffix denotes the manufacturing packaging format, distinguishing it from tube-packaged variants within the same functional series.
Replacement Considerations
The AD7894AR-3Z serves as a pin-compatible alternative within the same family, offering similar functionality but potentially different linearity grades or packaging formats.
