ADI ADA4805-1ARJZ-R7

The ADA4805-1/ADA4805-2 are high speed voltage feedback, rail-to-rail output amplifiers with an exceptionally low quiescent current of 500 μA, making them ideal for low power, high resolution data conversion systems. Despite being low power, these amplifiers provide excellent overall performance. They offer a high bandwidth of 105 MHz at a gain of +1, a high slew rate of 160 V/μs, and a low input offset voltage of 125 μV (maximum). A shutdown pin allows further reduction of the quiescent supply current to 2.9 μA. For power sensitive applications, the shutdown mode offers a very fast turn-on time of 3 μs. This allows the user to dynamically manage the power of the amplifier by turning the amplifier off between ADC samples. The proprietary extra fast complementary bipolar (XFCB) process allows both low voltage and low current noise (5.9 nV/√Hz, 0.6 pA/√Hz). The ADA4805-1/ADA4805-2 operate over a wide range of supply voltages from ±1.5 V to ±5 V, as well as single 3V and 5 V supplies, making them ideal for high speed, low power instruments. The ADA4805-1 is available in a 6-lead SOT-23 and a 6-lead SC70 package. The ADA4805-2 is available in an 8-lead MSOP and a 10-lead LFCSP package. These amplifiers are rated to work over the industrial temperature range of -40°C to +125°C.

• Low input offset voltage: 125 μV (maximum)
• Low input offset voltage drift 0.2 μV/°C (typical) 1.5 μV/°C (maximum)
• Ultralow supply current: 500 μA per amplifier
• Fully specified at V5 = 3 V, 5 V, ±5 V
• High speed performance −3 dB bandwidth: 105 MHz Slew rate: 160 V/μs Settling time to 0.7%: 35 ns
• Rail-to-rail outputs
• Input common-mode range: -VS - 0.1 V to +VS - 1 V
• Low noise: 5.9 nV/√Hz at 100 kHz; 0.6 pA/√Hz at 100 kHz
• Low distortion: −102 dBc/−126 dBc HD2/HD3 at 100 kHz
• Low input bias current: 470 nA (typical)
• Dynamic power scaling Turn-on time: 3 μs (maximum) fully settled
• Small packaging 6-lead SC70, 6-lead SOT-23, and 8-lead MSOP

• High resolution, high precision analog-to-digital converter (ADC) drivers
• Battery-powered instrumentation
• Micropower active filters
• Portable point of sales terminals
• Active RFID readers
• Photo multipliers
• ADC reference buffers