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AD7892BN-2
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Product Detailed Parameters
- Description：IC ADC 12BIT LP 500KSPS 24-DIP
- Series：-
- Mfr：Analog Devices Inc.
- Package：Tube
- Number of Bits：12
- Sampling Rate (Per Second)：500k
- 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：24-DIP (0.300", 7.62mm)
- Supplier Device Package：24-PDIP
- Mounting Type：Through Hole
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Overview
The AD7892BN-2 is a 12-bit successive approximation analog-to-digital converter fabricated in LC2MOS technology. It operates from a single +5 V supply with typical power consumption of 60 mW. The device features an on-chip track/hold amplifier and a +2.5 V internal reference. It supports a throughput rate of 500 kSPS with a conversion time of 1.6 µs. The analog input range is 0 V to +2.5 V. It offers both parallel and serial digital interfaces and is housed in a 24-lead plastic DIP package.
Feature Summary
- Integrated signal scaling for direct acquisition of 0 V to +2.5 V analog signals without external attenuation.
- Flexible interface architecture allowing selection between high-speed parallel data transfer and three-wire serial communication.
- Built-in track/hold amplifier ensures accurate sampling at maximum throughput rates.
Applications
- Portable instrumentation requiring low power consumption
- Industrial process control systems
- Data acquisition modules
Procurement Notes
Verify the specific suffix 'N' indicates the 24-lead plastic DIP package configuration. Confirm that the '-2' designation matches the required 0 V to +2.5 V unipolar input range for the application. Ensure the component meets the -40 °C to +85 °C commercial temperature specifications.
Selection Notes
Select this model when a unipolar 0 V to +2.5 V input range is required. The 500 kSPS throughput is suitable for moderate-speed applications. Consider the AD7892-3 if bipolar ±2.5 V inputs are needed, or the AD7892-1 for ±5 V/±10 V ranges.
Part Context
This component belongs to the AD7892 family of single-supply ADCs. It shares the core LC2MOS architecture and interface logic with other variants but differs in analog input scaling and throughput speed based on its specific suffix designation.
Replacement Considerations
AD7892AN-2: Same electrical performance with standard accuracy instead of ±1 LSB relative accuracy.
FAQ
How is the serial interface mode activated?
Serial mode is enabled by connecting the MODE pin (Pin 7) to a logic low voltage level.
What is the function of Pin 3 (VIN2) for this specific part?
For the AD7892-2, Pin 3 can be left unconnected but must not be connected to any potential other than Analog Ground (AGND).
Can the internal reference be used externally?
Yes, the internal +2.5 V reference is available at the REF OUT/REF IN pin, though it may require buffering due to its nominal output impedance of 5.5 kΩ.
