ADA4638-1ARZ

The ADA4638-1 is a high voltage, high precision zero-drift amplifier with rail-to-rail output swing, guaranteed to operate from a 4.5 V to 30 V single supply or ±2.25 V to ±15 V dual supply. Power consumption is less than 0.95 mA from a ±5 V supply. The ADA4638-1 features a 4 μV offset voltage, less than 0.05 μV/°C offset drift, no 1/f noise, and an input voltage noise of only 1.2 μV p-p (0.1 Hz to 10 Hz), making it suitable for high precision applications where large error sources cannot be tolerated. The near-zero drift of this device over a wide operating temperature range makes it highly beneficial for pressure sensor, medical equipment, and strain gauge amplifier applications. Many applications can take advantage of the rail-to-rail output swing provided by the ADA4638-1 to maximize SNR. The ADA4638-1 is rated over the −40°C to +125°C extended industrial temperature range and is available in 8-lead LFCSP (3 mm × 3 mm) and SOIC packages.

Applications

• Electronic scales
• Pressure and position sensors
• Strain gauge amplifiers
• Medical instruments
• Thermocouple amplifiers

Key features

• Single supply: 4.5 V to 30 V
• Dual supply: ±2.25 V to ±15 V
• Low offset voltage: 4 μV (maximum)
• Input offset voltage drift: 0.05 μV/°C (maximum)
• High gain: 130 dB (minimum)
• High PSRR: 120 dB (minimum)
• High CMRR: 130 dB (minimum)
• Input common-mode range includes negative supply rail
• Rail-to-rail output
• Low supply current: 0.95 mA (maximum)