ADA4806-1ARJZ-R2

FEATURES TYPICAL APPLICATIONS CIRCUIT 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 5V C2 10µF IN+ REF VDD IN– C1 2.7nF AD7980 13391-001 ADA4806-1 R3 20Ω GND Figure 1. Driving the AD7980 with the ADA4806-1 Sleep mode reduces the amplifier quiescent current to 74 µA and provides a fast turn-on time of only 0.45 µs, enabling the use of dynamic power scaling for sample rates approaching 2 MSPS. For additional power savings at lower samples rates, the shutdown mode further reduces the quiescent current to only 2.9 µA. The ADA4806-1 operates over a wide range of supply voltages and is fully specified at supplies of 3 V, 5 V and ±5 V. This amplifier is available in a compact, 8-lead SOT-23 package and is rated to operate over the industrial temperature range of −40°C to +125°C. 3.5 3.0 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. 2.5 SHUTDOWN MODE 2.0 1.5 1.0 SLEEP MODE 0.5 0 1 10 100 ADC SAMPLE RATE (ksps) 1000 Figure 2. Quiescent Power Dissipation vs. ADC Sample Rate, Using Dynamic Power Scaling for the Two Low Power Modes Table 1. Complementary ADCs to the ADA4806-1 Product AD7980 AD7982 AD7984 1 Rev. A VDD C4 100nF C3 0.1µF 5V 0V TO VREF GENERAL DESCRIPTION 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. ADA4806-1 2.5V REF POWER CONSUMPTION (mW) 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 dB bandwidth: 105 MHz Slew rate: 160 V/ µs Low noise and distortion 5.9 nV/√Hz input voltage noise with 8 Hz 1/f corner −102 dBc/−126 dBc HD2/HD3 at 100 kHz Wide supply range: 2.7 V to 10 V Small package: 8-lead SOT-23 13391-611 Data Sheet 0.2 µV/°C Offset Drift, 105 MHz, Low Power, Multimode, Rail-to-Rail Amplifier ADA4806-1 ADC Power (mW) 4.0 7.0 10.5 Throughput (MSPS) 1 1 1.33 Resolution (Bits) 16 18 18 SNR (dB) 90.51 98 98.5 This SNR value is for the A Grade version of the AD7980. 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 ©2015-2017 Analog Devices, Inc. All rights reserved. Technical Support www.analog.com ADA4806-1 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 Thermal Resistance ...................................................................... 8 Driving Low Power, High Resolution Successive Approximation Register (SAR) ADCs..................................... 20 Maximum Power Dissipation ..................................................... 8 Dynamic Power Scaling............................................................. 21 ESD Caution .................................................................................. 8 Single-Ended to Differential Conversion ................................... 23 Pin Configurations and Function Descriptions ........................... 9 Layout Considerations ............................................................... 23 Typical Performance Characteristics ........................................... 10 Outline Dimensions ....................................................................... 24 Test Circuits ..................................................................................... 17 Ordering Guide .......................................................................... 24 REVISION HISTORY 5/2017—Rev. 0 to Rev. A Changes to Figure 1 ........................................................................... 1 9/2015—Revision 0: Initial Version Rev. A | Page 2 of 24 Data Sheet ADA4806-1 SPECIFICATIONS ±5 V SUPPLY VS = ±5 V at TA = 25°C; RF = 0 Ω for G = +1; otherwise, RF = 1 kΩ; RL = 2 kΩ to ground; unless otherwise noted. Table 2. Parameter DYNAMIC PERFORMANCE −3 dB Bandwidth Bandwidth for 0.1 dB Flatness Slew Rate Settling Time to 0.1% NOISE/DISTORTION PERFORMANCE Harmonic Distortion, HD2/HD3 1 Input Voltage Noise Input Voltage Noise 1/f Corner Frequency 0.1 Hz to 10 Hz Voltage Noise Input Current Noise DC PERFORMANCE Input Offset Voltage Input Offset Voltage Drift 2 Input Bias Current (IB) Input Offset Current Open-Loop Gain INPUT CHARACTERISTICS Input Resistance Common Mode Differential Mode Input Capacitance Input Common-Mode Voltage Range Common-Mode Rejection Ratio (CMRR) SHUTDOWN PIN SHUTDOWN Voltage Low High SHUTDOWN Current Low High Turn-Off Time Turn-On Time Test Conditions/Comments Min Typ Max Unit G = +1, VOUT = 0.02 V p-p G = +1, VOUT = 2 V p-p G = +1, VOUT = 0.02 V p-p G = +1, VOUT = 2 V step G = +2, VOUT = 4 V step G = +1, VOUT = 2 V step G = +2, VOUT = 4 V step 120 40 18 190 250 35 78 MHz MHz MHz V/µs V/µs ns ns fC = 20 kHz, VOUT = 2 V p-p fC = 100 kHz, VOUT = 2 V p-p fC = 20 kHz, VOUT = 4 V p-p, G = +1 fC = 100 kHz, VOUT = 4 V p-p, G = +1 fC = 20 kHz, VOUT = 4 V p-p, G = +2 fC = 100 kHz, VOUT = 4 V p-p, G = +2 f = 100 kHz −114/−140 −102/−128 −109/−143 −93/−130 −113/−142 −96/−130 5.2 8 44 0.7 dBc dBc dBc dBc dBc dBc nV/√Hz Hz nV rms pA/√Hz f = 100 kHz Full power mode Low power mode, SLEEP = −VS TMIN to TMAX, 4 σ Full power mode Low power mode, SLEEP = −VS VOUT = −4.0 V to +4.0 V 107 13 800 0.2 550 3 2.1 111 125 1.5 800 25 50 260 1 VIN, CM = −4.0 V to +4.0 V −5.1 103 Powered down Enabled Powered down Enabled 50% of SHUTDOWN to 99% of final VOUT Rev. A | Page 3 of 24 −1.0 µV µV µV/°C nA nA nA dB 130 MΩ kΩ pF V dB −0.9 V V +4 +0.2 0.02 1.25 1.0 2.75 µA µA µs 1 3 µs ADA4806-1 Parameter SLEEP PIN SLEEP Voltage Low High SLEEP Current Low High Turn-Off Time (Full Power Mode to Sleep Mode) Turn-On Time (Sleep Mode to Full Power Mode) OUTPUT CHARACTERISTICS Output Overdrive Recovery Time (Rising/Falling Edge) Output Voltage Swing Short-Circuit Current Linear Output Current Off Isolation Capacitive Load Drive POWER SUPPLY Operating Range Quiescent Current per Amplifier Power Supply Rejection Ratio (PSRR) Positive Negative 1 2 Data Sheet Test Conditions/Comments Min Powered down Enabled Low Power Mode, SLEEP = −VS Enabled 50% of SLEEP to 30% of enabled quiescent current 50% of SLEEP to >99% of final VOUT −1.0 V V 1.0 240 µA µA ns 450 600 ns 95/100 −4.98 Full power mode Low power mode, SLEEP = −VS SHUTDOWN = −VS ns 85/73 1.4/1.8 ±58 +4.98 V mA mA mA 41 15 dB pF 570 85 7.4 100 100 Unit +0.2 0.02 180 2.7 +VS = +3 V to +5 V, −VS = −5 V +VS = +5 V, −VS = −3 V to −5 V Max −0.9 VIN = +6 V to −6 V, G = +2 RL = 2 kΩ Sourcing/sinking; full power mode Sourcing/sinking; low power mode, SLEEP = −VS 99% of final VOUT Rev. A | Page 5 of 24 µV µV µV/°C nA nA nA dB 133 MΩ kΩ pF V dB 1.9 V V +4 +0.1 0.01 0.9 1.0 1.25 µA µA µs 1.5 4 µs 1.9 −1.0 Unit V V +0.1 0.01 150 1.0 185 µA µA ns 450 600 ns ADA4806-1 Parameter OUTPUT CHARACTERISTICS Overdrive Recovery Time (Rising/Falling Edge) Output Voltage Swing Short-Circuit Current Linear Output Current Off Isolation Capacitive Load Drive POWER SUPPLY Operating Range Quiescent Current per Amplifier Power Supply Rejection Ratio Positive Negative 1 2 Data Sheet Test Conditions/Comments Min VIN = −1 V to +6 V, G = +2 RL = 2 kΩ Sourcing/sinking; full power mode Sourcing/sinking; low power mode, SLEEP = −VS 99% of final VOUT VIN = −1 V to +4 V, G = +2 RL = 2 kΩ Sourcing/sinking; full power mode Sourcing/sinking; low power mode, SLEEP = −VS +1.1 V +1.9 V −0.9 V +1.6 V