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AD7911ARM
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Product Detailed Parameters
- Description：IC ADC 10BIT DUAL 250KSPS 8MSOP
- Series：-
- Mfr：Analog Devices Inc.
- Package：Tube
- Number of Bits：10
- Sampling Rate (Per Second)：250k
- 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：8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Supplier Device Package：8-MSOP
- Mounting Type：Surface Mount
- Grade：-
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Overview
The AD7911ARM is a dual-channel, 10-bit successive approximation analog-to-digital converter (ADC) manufactured by Analog Devices. It operates from a single supply voltage ranging from 2.35 V to 5.25 V and supports throughput rates up to 250 kSPS. 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 typically 4 mW at 250 kSPS with 3 V supplies. The component is available in an 8-lead MSOP package and includes a standby mode with maximum current draw of 1 μA.
Feature Summary
- Dual-channel architecture with on-chip multiplexing for efficient signal acquisition.
- Low power dissipation achieved through advanced design techniques and configurable power-down modes.
- Internal reference derived from the power supply to maximize dynamic input range without external components.
- No pipeline delays ensure accurate control of sampling instants via the chip select input.
Applications
- Battery-powered personal digital assistants
- Medical instruments requiring low power consumption
- Mobile communications systems
- Data acquisition systems
Procurement Notes
Verify the specific ordering suffix to confirm the package type and reel specifications. Ensure compatibility with the required operating temperature range and supply voltage levels before integration. Cross-reference the manufacturer's latest datasheet revision to confirm pinout consistency and electrical characteristics.
Selection Notes
Select this component when a 10-bit resolution is sufficient for the application requirements. Consider the AD7921 variant if 12-bit resolution is necessary, as it shares similar power and interface characteristics. Evaluate the trade-off between throughput rate and power consumption based on the system's duty cycle and clock speed requirements.
Part Context
The AD7911 is part of the AD7911/AD7921 family of high-speed, low-power ADCs. This series is designed for applications requiring fast conversion rates with minimal power usage. The ARM suffix indicates the MSOP package configuration, distinguishing it from other packaging options like TSOT available within the same product line.
Replacement Considerations
The AD7921ARM serves as a higher-resolution alternative within the same family. Verify pinout compatibility and software driver adjustments when substituting components. Check for any changes in power consumption or timing specifications that may impact the existing circuit design.
