Ultra Low Power 120MHz High Spd R/R AMP
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Технические характеристики

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Корпус uSOP-8 MSOP8
Тип ОУ
Кол-во каналов ОУ
Напряжение питания
Частота единичного усиления
Максимальная скорость нарастания выходного сигнала
Диапазон рабочих температур
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FEATURES TYPICAL APPLICATIONS CIRCUIT APPLICATIONS 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 GENERAL DESCRIPTION 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. Rev. B +7.5V 5V REF ADA4805-1/ ADA4805-2 ADR435 VDD C2 10µF C4 100nF C3 0.1µF +7.5V ADA4805-1/ ADA4805-2 R3 20Ω IN+ AD7980 IN– C1 2.7nF REF VDD GND 11345-010 0V TO VREF Figure 1. Driving the AD7980 with the ADA4805-1/ADA4805-2 The Analog Devices, Inc., 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 3 V 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. 0 INPUT FREQUENCY = 10kHz SNR = 89.4dB THD = 104dB SINAD = 89.3dB –20 –40 AMPLITUDE (dB) 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 VS = 3 V, 5 V, ±5 V High speed performance −3 dB bandwidth: 105 MHz Slew rate: 160 V/µs Settling time to 0.1%: 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 –60 –80 –100 –120 –140 –160 –180 0 10 20 30 50 40 FREQUENCY (kHz) 60 70 80 11345-102 Data Sheet 0.2 µV/°C Offset Drift, 105 MHz Low Power, Low Noise, Rail-to-Rail Amplifiers ADA4805-1/ADA4805-2 Figure 2. FFT Plot for the Circuit Configuration in Figure 1 Table 1. Complementary ADCs to the ADA4805-1/ADA4805-2 Product AD7982 AD7984 AD7980 AD7685 ADC Power (mW) 7.0 10.5 4.0 10 Throughput (MSPS) 1 1.33 1 0.25 Resolution (Bits) 18 18 16 16 SNR (dB) 98 98.5 91 88 Document Feedback Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. Specifications subject to change without notice. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarks and registered trademarks are the property of their respective owners. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781.329.4700 ©2014 Analog Devices, Inc. All rights reserved. Technical Support PDF
Документация на ADA4805-2ARMZ-R7 

ADA4805-1/ADA4805-2 (Rev. B) 0.2 µV/°C Offset Drift, 105 MHz Low Power, Low Noise, Rail-to-Rail Amplifiers

Дата модификации: 03.12.2014

Размер: 765.3 Кб

25 стр.

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