0.2 V/C Offset Drift, 105 MHz, Low Power, Multimode, Rail-to-Rail Amplifier Data Sheet ADA4806-1 FEATURES TYPICAL APPLICATIONS CIRCUIT 5V Ultralow supply current 2.5V REF ADA4806-1 Full power mode: 500 A VDD C2 C3 C4 Sleep mode: 74 A 10F 0.1F 100nF Shutdown mode: 2.9 A 5V Dynamic power scaling 0V TO V ADA4806-1 Turn-on time from shutdown mode: 1.5 s REF REF VDD IN+ AD7980 Turn-on time from sleep mode: 0.45 s R3 IN 20 GND High speed performance with dc precision C1 2.7nF Input offset voltage: 125 V maximum Input offset voltage drift: 1.5 V/C maximum Figure 1. Driving the AD7980 with the ADA4806-1 3 dB bandwidth: 105 MHz Sleep mode reduces the amplifier quiescent current to 74 A Slew rate: 160 V/ s and provides a fast turn-on time of only 0.45 s, enabling the Low noise and distortion use of dynamic power scaling for sample rates approaching 5.9 nV/Hz input voltage noise with 8 Hz 1/f corner 2 MSPS. For additional power savings at lower samples rates, 102 dBc/126 dBc HD2/HD3 at 100 kHz the shutdown mode further reduces the quiescent current to Wide supply range: 2.7 V to 10 V only 2.9 A. Small package: 8-lead SOT-23 The ADA4806-1 operates over a wide range of supply voltages APPLICATIONS and is fully specified at supplies of 3 V, 5 V and 5 V. This Portable and battery-powered instruments and systems amplifier is available in a compact, 8-lead SOT-23 package and High channel density data acquisition systems is rated to operate over the industrial temperature range of Precision analog-to-digital converter (ADC) drivers 40C to +125C. Voltage reference buffers 3.5 Portable point of sales terminals 3.0 Active RFID readers GENERAL DESCRIPTION 2.5 The ADA4806-1 is a high speed, voltage feedback, rail-to-rail SHUTDOWN MODE 2.0 output, single operational amplifier with three power modes: full power mode, sleep mode, and shutdown mode. In full 1.5 power mode, this amplifier provides a wide bandwidth of 105 MHz at a gain of +1, a fast slew rate 160 V/s, and excellent dc precision 1.0 SLEEP MODE with a low input offset voltage of 125 V (maximum) and an input 0.5 offset voltage drift of 1.5 V/C (maximum), while consuming only 500 A of quiescent current. Despite being a low power 0 1 10 100 1000 amplifier, the ADA4806-1 provides excellent overall ADC SAMPLE RATE (ksps) performance, making it ideal for low power, high resolution Figure 2. Quiescent Power Dissipation vs. ADC Sample Rate, data conversion systems. Using Dynamic Power Scaling for the Two Low Power Modes For data conversion applications where minimizing power Table 1. Complementary ADCs to the ADA4806-1 dissipation is paramount, the ADA4806-1 offers a method to Throughput Resolution SNR reduce power by dynamically scaling the quiescent power of the Product ADC Power (mW) (MSPS) (Bits) (dB) ADC driver with the sampling rate of the system by switching the 1 AD7980 4.0 1 16 90.5 amplifier to a lower power mode between samples. AD7982 7.0 1 18 98 AD7984 10.5 1.33 18 98.5 1 This SNR value is for the A Grade version of the AD7980. Rev. A 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 One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. rights of third parties that may result from its use. Specifications subject to change without notice. No Tel: 781.329.4700 2015-2017 Analog Devices, Inc. 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Technical Support www.analog.com POWER CONSUMPTION (mW) 13391-611 13391-001ADA4806-1 Data Sheet TABLE OF CONTENTS Features .............................................................................................. 1 Theory of Operation ...................................................................... 18 Applications ....................................................................................... 1 Amplifier Description ................................................................ 18 General Description ......................................................................... 1 Input Protection ......................................................................... 18 Typical Applications Circuit ............................................................ 1 Shutdown/Sleep Mode Operation ............................................ 18 Revision History ............................................................................... 2 Noise Considerations ................................................................. 19 Specifications ..................................................................................... 3 Applications Information .............................................................. 20 5 V Supply ................................................................................... 3 Slew Enhancement ..................................................................... 20 5 V Supply ...................................................................................... 4 Effect of Feedback Resistor on Frequency Response ............ 20 3 V Supply ...................................................................................... 6 Compensating Peaking in Large Signal Frequency Response ... 20 Absolute Maximum Ratings ............................................................ 8 Driving Low Power, High Resolution Successive Approximation Register (SAR) ADCs..................................... 20 Thermal Resistance ...................................................................... 8 Dynamic Power Scaling ............................................................. 21 Maximum Power Dissipation ..................................................... 8 Single-Ended to Differential Conversion ................................... 23 ESD Caution .................................................................................. 8 Layout Considerations ............................................................... 23 Pin Configurations and Function Descriptions ........................... 9 Outline Dimensions ....................................................................... 24 Typical Performance Characteristics ........................................... 10 Ordering Guide .......................................................................... 24 Test Circuits ..................................................................................... 17 REVISION HISTORY 5/2017Rev. 0 to Rev. A Changes to Figure 1 ........................................................................... 1 9/2015Revision 0: Initial Version Rev. A Page 2 of 24