AD8628AUJZ-REEL7

This amplifier features ultralow offset, drift, and bias current characteristics. The AD8628/AD8629/AD8630 are wide-bandwidth, auto-zero amplifiers with rail-to-rail input and output swing and low noise, operating from a 2.7V to 5V single supply (±1.35V to ±2.5V dual supply). The AD8628/AD8629/AD8630 deliver performance advantages previously available only in expensive auto-zero or chopper-stabilized amplifiers. These zero-drift amplifiers employ a circuit topology that combines low cost with high precision and low noise, requiring no external capacitors. In addition, the AD8628/AD8629/AD8630 significantly reduce the digital switching noise associated with most chopper-stabilized amplifiers. With an offset voltage of only 1μV, offset voltage drift of less than 0.005μV/°C, and noise of only 0.5μV peak-to-peak (0Hz to 10Hz), the AD8628/AD8629/AD8630 are ideal for applications that cannot tolerate error sources. These devices exhibit near-zero drift over the operating temperature range, making them highly beneficial for position and pressure sensors, medical equipment, and strain gauge amplifier applications. Many systems can take advantage of the rail-to-rail input and output swing capability of the AD8628/AD8629/AD8630 to reduce input biasing complexity and maximize signal-to-noise ratio.

Applications

• Automotive sensors
• Pressure and position sensors
• Strain gauge amplifiers
• Medical instrumentation
• Thermocouple amplifiers
• Precision current sensing
• Photodiode amplifiers

Key features

• Lowest noise auto-zero amplifier
• Low offset voltage: 1μV
• Input offset drift: 0.002μV/°C
• Rail-to-rail input and output swing
• 5V single-supply operation
• High gain, high CMRR and high PSRR: 130dB
• Ultra-low input bias current: 100pA (maximum)
• Low supply current: 1.0mA
• Overload recovery time: 50μs
• No external components required
• Automotive qualified