ADA4691-4 Datasheet

• Low power: 180 μA typical
• Very low input bias currents: 0.5 pA typical
• Low noise: 16 nV/√Hz typical
• 3.6 MHz bandwidth
• Offset voltage: 500 μV typical
• Low offset voltage drift: 4 μV/°C maximum
• Low distortion: 0.003% THD + N
• 2.7 V to 5 V single supply or ±1.35 V to ±2.5 V dual supply
• Available in very small 2 mm × 2 mm LFCSP packages

• Photodiode amplifiers
• Sensor amplifiers
• Portable medical and instrumentation
• Portable audio: MP3s, PDAs, and smartphones
• Communications
• Low-side current sense
• ADC driver
• Active filters
• Sample-and-hold

The ADA4691-4 are the quad rail-to-rail output, single-supply amplifiers featuring low power, wide bandwidth, and low noise. The ADA4691-4 is a quad with dual shutdown pins each controlling a pair of amplifiers and is available in the 16-lead LFCSP.

These amplifiers are ideal for a wide variety of applications. Audio, filters, photodiode amplifiers, and charge amplifiers, all benefit from this combination of performance and features. Additional applications for these amplifiers include portable consumer audio players with low noise and low distortion that provide high gain and slew rate response over the audio band at low power. Industrial applications with high impedance sensors, such as pyroelectric and IR sensors, benefit from the high impedance and low 0.5 pA input bias, low offset drift, and enough bandwidth and response for low gain applications.

The ADA4691-4 is fully specified over the extended industrial temperature range (−40°C to +125°C). The ADA4691-4 is available in a 16-lead LFCSP.