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AD7859LAS
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Product Detailed Parameters
- Description：IC ADC 12BIT 8CH 200KSPS 44-MQFP
- Series：-
- Mfr：Analog Devices Inc.
- Package：Bag
- Number of Bits：12
- Sampling Rate (Per Second)：100k
- Number of Inputs：-
- Input Type：-
- Data Interface：Parallel
- Configuration：-
- Ratio - S/H:ADC：-
- Number of A/D Converters：2
- Architecture：-
- Reference Type：-
- Voltage - Supply, Analog：-
- Voltage - Supply, Digital：-
- Features：-
- Operating Temperature：-40°C ~ 85°C
- Package / Case：44-QFP
- Supplier Device Package：44-MQFP (10x10)
- Mounting Type：Surface Mount
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Overview
The AD7859LAS is an 8-channel, 12-bit successive approximation analog-to-digital converter (ADC) optimized for low power consumption. It operates from a single 3 V to 5.5 V supply and delivers a throughput rate of 100 kSPS. The device features a flexible parallel interface supporting both 16-bit word and 8-bit byte transfers. It incorporates internal self-calibration and system calibration options to maintain accuracy over time and temperature variations. Typical power dissipation is 5.5 mW in normal operation at 3 V, with additional power-down modes reducing consumption to microampere levels.
Feature Summary
- Low-power optimization with automatic power-down capabilities
- Integrated self-calibration and system calibration functions
- Flexible parallel data interface with selectable word or byte modes
- Pseudo-differential and single-ended input channel configurations
Applications
- Battery-powered medical instruments
- Portable personal digital assistants
- Mobile communication systems
- Instrumentation and control systems
Procurement Notes
Verify the specific suffix 'LAS' against the manufacturer's current ordering guide to confirm package type and temperature range specifications. Confirm availability status as this component may be subject to discontinuation notices. Ensure compatibility with existing PCB footprints for the S-44 (PQFP) package before procurement.
Selection Notes
Select the AD7859LAS when low power consumption is prioritized over maximum sampling speed compared to the standard AD7859 variant. Verify that the 100 kSPS throughput meets system requirements. Ensure the design supports the required parallel interface timing and voltage levels for the 3 V to 5.5 V operating range.
Part Context
This component belongs to the AD7859 family of high-speed, low-power ADCs manufactured by Analog Devices. The family includes variants optimized for different performance trade-offs, such as the AD7859 for higher speed and the AD7859L series for lower power. The AD7859LAS specifically denotes the low-power version in a plastic quad flatpack package.
Replacement Considerations
The AD7859BSZ is a pin-compatible alternative within the same family offering improved linearity specifications. The AD7859APZ provides similar functionality but may differ in package style or calibration characteristics. Verify electrical parameters and software register compatibility before substitution.
