AD8276ARZ

The AD8276/AD8277 are general-purpose, unity-gain difference amplifiers designed for precision signal conditioning in high-performance, low-power applications. They provide excellent common-mode rejection (86 dB) and high bandwidth when amplifying signals beyond the supply rails. On-chip resistors are laser-trimmed to achieve superior gain accuracy and high CMRR. Both devices exhibit very low gain drift over temperature. Their common-mode range extends to nearly twice the supply voltage, making them well suited for single-supply applications requiring a wide common-mode voltage range. The internal resistors and ESD circuitry at the inputs also provide overvoltage protection for these amplifiers. The AD8276/AD8277 are unity-gain stable amplifiers. Although optimized primarily for use as difference amplifiers, they can also be configured in high-precision, single-ended configurations with gains of −1, +1, and +2. The AD8276/AD8277 offer an integrated precision solution that is smaller, lower cost, and higher performance than discrete alternatives. The AD8276/AD8277 operate from a 2.0 V to 36 V single supply or ±2 V to ±18 V dual supply. With a maximum quiescent supply current of 200 μA per channel, they are well suited for battery-powered portable systems.

Applications

• Voltage measurement and monitoring
• Current measurement and monitoring
• Differential output instrumentation amplifier
• Portable battery-powered equipment
• Test and measurement

Key features

• Wide input range beyond supply voltage
• Reliable input overvoltage protection
• Low supply current: 200μA per channel (maximum)
• Low power consumption: 0.5mW/Vc = 2.5V
• Bandwidth: 550kHz
• Common-mode rejection ratio: 86dB (minimum, dc to 10kHz)
• Low offset voltage drift: ±2μV/℃ (maximum, Grade B)
• Low gain drift: 1ppm/℃ (maximum, Grade B)
• Enhanced slew rate: 1.1V/μs
• Wide supply voltage range: Single supply: 2V to 36V; Dual supply: ±2V to ±18V