AD8276BRMZ-R7

The AD8276/AD8277 are general-purpose, unity-gain difference amplifiers intended for precision signal conditioning in power critical applications that require both high performance and low power. They provide exceptional 86 dB common-mode rejection ratio (CMRR) and high bandwidth while amplifying signals well beyond the supply rails. The on-chip resistors are laser trimmed for gain drift of 1 ppm/°C and high CMRR. The AD8276/AD8277 also have extremely low gain drift vs. temperature. The common-mode range of the amplifiers extends to almost double the supply voltage, making these amplifiers ideal for single-supply applications that require a high common-mode voltage range. The internal resistors and electrostatic discharge (ESD) circuitry at the inputs also provide overvoltage protection to the op amps. The AD8276/AD8277 are unity-gain stable. Although they are optimized for use as difference amplifiers, they can also be connected in high precision, single-ended configurations with G = -1, +1, or +2. The AD8276/AD8277 provide an integrated precision solution that has smaller size, lower cost, and improved performance than a discrete alternative. The AD8276/AD8277 operate on single supplies (2.0 V to 36 V) or dual supplies (±2 V to ±18 V). The maximum quiescent supply current is 200 μA per channel, which is ideal for battery-operated and 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 supplies
• Rugged input overvoltage protection
• Low supply current: 200 μA maximum per channel
• Low power dissipation: 0.54 mW at V = 2.7 V
• Bandwidth: 550 kHz
• CMRR: 86 dB minimum, dc to 10 kHz
• System offset voltage: ±2 μV/°C maximum (B Grade)
• Low gain drift: 1 ppm/°C maximum (B Grade)
• Enhanced slew rate: 1.1 V/μs
• Wide power supply range Single supply: 2.0 V to 36 V Dual supplies: ±2 V to ±18 V