ADA4806-1 Datasheet | Analog Devices

FEATURES Ultralow supply current Full power mode: 500 µA Sleep mode: 74 µA Shutdown mode: 2.9 µA Dynamic power scaling Turn-on time from shutdown mode: 1.5 µs Turn-on time from sleep mode: 0.45 µs High speed performance with dc precision Input offset voltage: 125 µV maximum Input offset voltage drift: 1.5 µV/°C maximum - 3 d B bandwidth: 105 MHz Slew rate: 160 V/ µs Low noise and distortion 5.9 n V/√Hz input voltage noise with 8 Hz 1/f corner - 102 d Bc/- 126 d Bc HD2/HD3 at 100 k Hz Wide supply range: 2.7 V to 10 V Small package: 8-lead SOT-23 APPLICATIONS Portable and battery-powered instruments and systems High channel density data acquisition systems Precision analog-to-digital converter (ADC) drivers Voltage reference buffers Portable point of sales terminals Active RFID readers GENERAL DESCRIPTION The ADA4806-1 is a high speed, voltage feedback, rail-to-rail output, single operational amplifier with three power modes: full power mode, sleep mode, and shutdown mode. In full power mode, this amplifier provides a wide bandwidth of 105 MHz at a gain of +1, a fast slew rate 160 V/μs, and excellent dc precision with a low input offset voltage of 125 μV (maximum) and an input offset voltage drift of 1.5 μV/°C (maximum), while consuming only 500 μA of quiescent current. Despite being a low power amplifier, the ADA4806-1 provides excellent overall performance, making it ideal for low power, high resolution data conversion systems. For data conversion applications where minimizing power dissipation is paramount, the ADA4806-1 offers a method to reduce power by dynamically scaling the quiescent power of the ADC driver with the sampling rate of the system by switching the amplifier to a lower power mode between samples. TYPICAL APPLICATIONS CIRCUIT 5V 2.5V REF C2 10µF C3 0.1µF C4 100n F 0V TO VREF 5V R3 20Ω C1 2.7n F REF VDD IN+ AD7980 IN- 13391-001 Figure 1. Driving the AD7980 with the ADA4806-1 Sleep mode reduces the amplifier quiescent...