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The AD1674AD is a 12-bit, 100 kSPS analog-to-digital converter manufactured by Analog Devices Inc. It features an integrated sample-and-hold amplifier (SHA), a 10 V reference, and three-state output buffers for microprocessor interfacing. The device supports unipolar (0 V to +10 V, 0 V to +20 V) and bipolar (±5 V, ±10 V) input ranges. It operates on +5 V logic and ±12 V or ±15 V analog supplies. The AD1674AD is specified for the industrial temperature range of –40°C to +85°C and utilizes a hermetically sealed ceramic DIP package.
Verify that the specific orderable part number matches the required package and temperature grade. Confirm supply voltage requirements align with the ±12 V or ±15 V analog supply specifications. Ensure ESD precautions are observed during handling due to the sensitivity of the CMOS/BiMOS II process technology used in fabrication.
Select the AD1674AD when hermetic sealing is required for the –40°C to +85°C industrial temperature range. Choose this model over plastic packages if environmental protection against moisture and contaminants is critical. Verify that the system design accommodates the dual power supply requirement of +5 V logic and ±12 V/±15 V analog rails.
The AD1674AD belongs to the AD1674 family of 12-bit SAR ADCs. It shares functional compatibility with industry standards like the AD574A but offers improved conversion speed and integrated sampling capabilities. The 'AD' suffix denotes the hermetically sealed ceramic DIP package option within the Analog Devices product lineup.
Direct pin-compatible replacements include other AD1674 variants such as the AD1674BD or AD1674TD, depending on the required temperature range and packaging constraints. Cross-reference with AD574A or AD674A for legacy system upgrades, noting differences in conversion speed and internal SHA integration.