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AD7862AR-3
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Product Detailed Parameters
- Description：IC ADC 12BIT DUAL 250KSPS 28SOIC
- Series：-
- Mfr：Analog Devices Inc.
- Package：Tube
- Number of Bits：12
- Sampling Rate (Per Second)：250k
- 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：28-SOIC (0.295", 7.50mm Width)
- Supplier Device Package：28-SOIC
- Mounting Type：Surface Mount
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Overview
The AD7862AR-3 is a dual-channel, 12-bit successive approximation analog-to-digital converter (ADC) operating from a single +5 V supply. It features two simultaneous sampling track/hold amplifiers and an internal +2.5 V reference. The device supports a ±2.5 V input voltage range with overvoltage protection up to ±7 V. Key electrical parameters include a maximum conversion time of 3.6 μs, a throughput rate of 250 kSPS, and typical power dissipation of 60 mW in normal mode. It utilizes a high-speed parallel interface for data transfer.
Feature Summary
- Simultaneous sampling and conversion of two channels preserves relative phase information between inputs.
- Integrated internal +2.5 V reference eliminates the need for external components in standard configurations.
- High-speed parallel interface allows direct connection to microprocessors and digital signal processors.
- Overvoltage protection on analog inputs prevents damage during fault conditions.
Applications
- AC Motor Control
- Uninterrupted Power Supplies
- Data Acquisition Systems
- Communications
Procurement Notes
Verify the specific suffix 'AR' confirms the SOIC-28 package and commercial temperature range (-40°C to +85°C). Confirm that the '-3' designation matches the required ±2.5 V input range. Check for RoHS compliance status as manufacturing revisions may vary. Ensure ESD precautions are observed during handling due to the sensitivity of the CMOS process.
Selection Notes
Select this component when simultaneous sampling of two channels is required to maintain phase coherence. The AD7862AR-3 is appropriate for applications needing a ±2.5 V input range rather than the wider ±10 V range offered by the AD7862-10 variant. Consider the 60 mW power consumption if thermal management is critical. Verify that the parallel interface timing requirements align with the host system's bus speed.
Part Context
The AD7862 belongs to a family of high-speed, low-power dual ADCs fabricated using Linear Compatible CMOS (LC2MOS) technology. This process combines precision bipolar circuits with low-power CMOS logic. The device is pin-compatible with the 14-bit AD7863, allowing for potential upgrades in resolution without changing the PCB layout.
Replacement Considerations
The AD7862BR-3 offers the same functionality and package but with tighter accuracy specifications. The AD7862ARS-3 provides the same electrical characteristics in a Shrink Small Outline Package (SSOP).
