AD7862BR-3

Overview

The AD7862BR-3 is a dual 12-bit successive approximation analog-to-digital converter (ADC) from Analog Devices, operating on a single +5 V supply. It features two simultaneous sampling channels with four analog inputs grouped into Channel A and Channel B. The device provides a throughput rate of 250 kSPS with a conversion time of 3.6 μs and an acquisition time of 0.3 μs. It includes an internal +2.5 V reference and supports an input voltage range of ±2.5 V. The part utilizes a high-speed parallel interface and operates within a temperature range of -40°C to +85°C.

Feature Summary

• Simultaneous sampling and conversion of two independent channels preserves relative phase information between signals.
• Integrated track/hold amplifiers ensure accurate digitization of full-scale sine waves at maximum throughput rates.
• Built-in overvoltage protection allows analog inputs to withstand voltages up to ±7 V without damage.
• Automatic power-down mode reduces power consumption significantly after each conversion cycle.

Applications

• AC motor control systems
• Uninterrupted power supplies (UPS)
• Data acquisition systems
• Communications equipment

Procurement Notes

Verify the specific suffix 'BR' indicates the commercial temperature grade (-40°C to +85°C) and SOIC package variant. Confirm that the '-3' designation corresponds to the ±2.5 V input range specification. Ensure compatibility with single +5 V supply requirements and check for RoHS compliance status in current manufacturing documentation.

Selection Notes

Select this component when simultaneous dual-channel sampling is required for phase-sensitive applications. Choose the AD7862BR-3 specifically for ±2.5 V bipolar input ranges; use AD7862AR-3 or BR-10 for different accuracy grades or ±10 V ranges. Consider the AD7863 if a 14-bit resolution upgrade is needed while maintaining pin compatibility.

Part Context

The AD7862 belongs to the AD7862 family of high-speed, low-power ADCs fabricated using Linear Compatible CMOS (LC2MOS) process. It is designed as a cost-effective solution for multi-channel data acquisition. The BR suffix denotes a specific performance bin and package type within the broader AD7862 product line, which also includes versions with ±10 V and unipolar input capabilities.

Replacement Considerations

The AD7863 serves as a 14-bit pin-compatible upgrade option. For different input ranges, consider the AD7862AR-3 (±2.5 V, commercial grade) or AD7862BR-10 (±10 V). Verify that any substitute maintains the 250 kSPS throughput and parallel interface timing requirements.