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AD7922AUJ-R2
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Product Detailed Parameters
- Description：IC ADC DUAL 12BIT 2CH TSOT-23-8
- Series：-
- Mfr：Analog Devices Inc.
- Package：Bulk
- Number of Bits：12
- Sampling Rate (Per Second)：1M
- Number of Inputs：-
- Input Type：-
- Data Interface：SPI, DSP
- 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：SOT-23-8 Thin, TSOT-23-8
- Supplier Device Package：TSOT-23-8
- Mounting Type：Surface Mount
- Grade：-
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Overview
The AD7922AUJ-R2 is a dual-channel, 12-bit successive approximation analog-to-digital converter (ADC) manufactured by Analog Devices Inc. It operates from a single supply voltage ranging from 2.35 V to 5.25 V and supports throughput rates up to 1 MSPS. The device features an internal track-and-hold amplifier capable of handling input frequencies exceeding 6 MHz. It utilizes a flexible serial interface compatible with SPI, QSPI, MICROWIRE, and DSP standards. Power consumption is optimized for high-speed operation, dissipating approximately 15.5 mW at 1 MSPS with a 5 V supply. The component is housed in an 8-lead TSOT package.
Feature Summary
- Dual-channel architecture with integrated multiplexer and track-and-hold amplifier
- High-speed data conversion capability reaching 1 MSPS throughput rate
- Flexible serial communication interface supporting multiple standard protocols
- Low power dissipation with dedicated standby mode for energy efficiency
Applications
- Battery-powered personal digital assistants and mobile communications devices
- Medical instruments requiring precise signal acquisition
- Data acquisition systems and instrumentation control applications
- High-speed modems and optical sensor interfaces
Procurement Notes
Verify the specific ordering suffix against official documentation to confirm packaging configuration. Ensure compatibility with system voltage requirements between 2.35 V and 5.25 V. Confirm that the 8-lead TSOT package dimensions align with the target PCB layout constraints before finalizing procurement orders.
Selection Notes
Select this component when a 12-bit resolution is required alongside a 1 MSPS sampling rate. It is suitable for designs needing a wide dynamic input range derived directly from the supply voltage without external references. Consider the low power characteristics if battery life is a critical design parameter.
Part Context
This part belongs to the AD7912/AD7922 family of high-speed, low-power ADCs. The AD7922 variant specifically provides 12-bit resolution compared to the 10-bit AD7912. Both share identical pinouts, power specifications, and interface protocols, differing primarily in bit depth and associated linearity performance metrics.
Replacement Considerations
The AD7912 serves as a lower-resolution alternative within the same package and interface ecosystem. Verify that the 10-bit resolution of the AD7912 meets the application's accuracy requirements before substituting.
