ANALOG DEVICES ADA4895-2

1 nV/√Hz, Low Power,G≥10 Stable Rail-to-Rail Output Amplifier Preliminary Data Sheet ADA4895-2 FUNCTIONAL BLOCK DIAGRAM FEATURES Low wideband noise 1 nV/√Hz 2.8 pA/√Hz Low 1/f noise 2.4 nV/√Hz @ 10 Hz Low distortion: −115 dBc @ 100 kHz, V = 2 V p-p OUT Low power: 3 mA/amp Low input offset voltage: 0.5 mV maximum Figure 1. 10-Lead MSOP (ADA4895-2) High speed 8 V = ±5V S 230 MHz, −3 dB bandwidth (G = +10) 7 500 V/μs slew rate TBD ns settling time to 0.1% 6 Rail-to-rail output 5 Wide supply range: 3 V to 10 V Disable feature 4 APPLICATIONS 3 Low noise preamplifier 2 Ultrasound amplifiers PLL loop filters 1 High performance ADC drivers 0 DAC buffers 1 10 100 1k 10k 100k 1M 5M FREQUENCY (Hz) GENERAL DESCRIPTION Figure 2. Voltage Noise vs. Frequency The ADA4895-2 is gain 10 stable, low noise, rail-to-rail output, Table 1. Other Low Noise Amplifiers high speed voltage feedback amplifier having a quiescent V (nV/√Hz) V (nV/√Hz) Supply N N current of 3 mA. With the 1/f noise of 2.4 nV/√Hz at 10 Hz and Part Number @ 1 kHz @ 100 kHz BW (MHz) Voltage (V) a spurious-free dynamic range of −63 dBc at 2 MHz, the AD797 0.9 0.9 8 10 to 30 ADA4895-2 is an ideal solution in a variety of applications, AD8021 5 2.1 490 5 to 24 including ultrasound, low noise preamplifiers, and drivers of AD8099 7 0.95 510 5 to 12 high performance ADCs. The Analog Devices, Inc., proprietary AD8045 6 3 1000 3.3 to 12 next generation SiGe bipolar process and innovative ADA4897-1 1 1 230 3 to 10 ADA4896-2 1 1 230 3 to 10 architecture enable such high performance amplifiers. ADA4899-1 1.4 1 600 5 to 12 The ADA4895-2 has 1500 MHz Gain bandwidth product, ADA4898-1/ 0.9 0.9 65 10 to 32 500 V/μs slew rate, and settle to 0.1% in TBD ns. With a wide ADA4898-2 supply voltage range (3 V to 10 V), the ADA4895-2 is ideal Table 2. Complementary ADCs candidates for systems that require high dynamic range, high Part Number Bits Speed (MSPS) Power (mW) gain, precision, and high speed. AD7944 14 2.5 15.5 The ADA4895-2 is available in 10-lead MSOP package and AD7985 16 2.5 15.5 itoperates over the extended industrial temperature range of AD7986 18 2 15 −40°C to +125°C. Rev. PrB 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 www.analog.com license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Fax: 781.461.3113 ©2011 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. VOLTAGE NOISE (nV/√Hz) 09447-102 ADA4895-2 Preliminary Data Sheet TABLE OF CONTENTS Features .............................................................................................. 1  ±5 V Supply ....................................................................................3  Applications ....................................................................................... 1  +5 V Supply ....................................................................................5  General Description ......................................................................... 1  +3 V Supply ....................................................................................7  Functional Block Diagram .............................................................. 1  Pin Configurations and Function Descriptions ............................9  Revision History ............................................................................... 2  Typical Performance Characteristics ........................................... 10  Specif ica t ions ..................................................................................... 3  Outline Dimensions ....................................................................... 12  Rev. PrB | Page 2 of 12 Preliminary Data Sheet ADA4895-2 SPECIFICATIONS ±5 V SUPPLY T = 25°C, G = +10, R = 1 kΩ to ground, unless otherwise noted. A L Table 3. Parameter Conditions Min Typ Max Unit DYNAMIC PERFORMANCE –3 dB Bandwidth G = +10, VOUT = 0.2 V p-p 233 MHz G = +10, V = 2 V p-p 140 MHz OUT G = +20, V = 0.2 V p-p TBD MHz OUT Bandwidth for 0.1 dB Flatness G = +10, VOUT = 2 V p-p, RL = 100 Ω 10 MHz Slew Rate G = +10, VOUT = 6 V step 500 V/μs Settling Time to 0.1% G = +10, VOUT = 2 V step TBD ns Settling Time to 0.01% G = +10, V = 2 V step TBD ns OUT NOISE/HARMONIC PERFORMANCE Harmonic Distortion (dBc) SFDR fC = 100 kHz, VOUT = 2 V p-p −88 dBc f = 1 MHz, V = 2 V p-p −68 dBc C OUT f = 2 MHz, V = 2 V p-p −63 dBc C OUT fC = 5 MHz, VOUT = 2 V p-p −55 dBc Input Voltage Noise f = 10 Hz 2.4 nV/√Hz f = 100 kHz 1 nV/√Hz Input Current Noise f = 10 Hz 24 pA/√Hz f = 100 kHz 2.94 pA/√Hz 0.1 Hz to 10 Hz Noise G = +101, R = 1 kΩ, R = 10 Ω 99 nV p-p F G DC PERFORMANCE Input Offset Voltage −500 −28 +500 μV Input Offset Voltage Drift 0.2 μV/°C Input Bias Current −17 −11 −4 μA Input Bias Current Drift 3 nA/°C Input Bias Offset Current −0.6 −0.02 +0.6 μA Open-Loop Gain V = −4 V to +4 V 100 110 dB OUT INPUT CHARACTERISTICS Input Resistance Common mode/differential 10 M/10 k Ω Input Capacitance Common mode/differential 3/11 pF Input Common-Mode Voltage Range −4.9 to +4.1 V Common-Mode Rejection VCM = −2 V to +2 V −92 −120 dB OUTPUT CHARACTERISTICS Output Overdrive Recovery Time V = ±5 V, G = +2 81 ns IN +Output Voltage Swing RL = 1 kΩ 4.85 4.96 V −Output Voltage Swing RL = 1 kΩ −4.85 −4.97 V +Output Voltage Swing RL = 100 Ω 4.5 4.73 V −Output Voltage Swing R = 100 Ω −4.5 −4.84 V L Output Current 45 dBc SFDR 80 mA Short-Circuit Current Sinking/sourcing 135 mA Capacitive Load Drive 30% overshoot, G = +2 39 pF POWER SUPPLY Operating Range 3 to 10 V Quiescent Current per Amplifier 2.8 3 3.2 mA DISABLE = −5 V 0.25 mA Positive Power Supply Rejection +V = 4 V to 6 V, −V = −5 V −96 −125 dB S S Negative Power Supply Rejection +V = 5 V, −V = −4 V to −6 V −96 −121 dB S S Rev. PrB | Page 3 of 12 ADA4895-2 Preliminary Data Sheet Parameter Conditions Min Typ Max Unit DISABLE PIN DISABLE Voltage Enabled >+VS − 0.5 V Disabled <+VS – 2 V Input Current Enabled DISABLE = +5 V −2.5 μA Disabled −80 μA DISABLE = −5 V Switching Speed Enabled 0.25 μs Disabled 12 μs Rev. PrB | Page 4 of 12 Preliminary Data Sheet ADA4895-2 +5 V SUPPLY TA = 25°C, G = +10, RL = 1 kΩ to midsupply, unless otherwise noted. Table 4. Parameter Conditions Min Typ Max Unit DYNAMIC PERFORMANCE −3 dB Bandwidth G = +10, VOUT = 0.2 V p-p 203 MHz G = +10, VOUT = 2 V p-p 127 MHz G = +20, VOUT = 0.2 V p-p TBD MHz Bandwidth for 0.1 dB Flatness G = +10, V = 2 V p-p, R = 100 Ω 9.8 MHz OUT L Slew Rate G = +10, V = 3 V step 451 V/μs OUT Settling Time to 0.1% G = +10, VOUT = 2 V step TBD ns Settling Time to 0.01% G = +10, VOUT = 2 V step TBD ns NOISE/HARMONIC PERFORMANCE Harmonic Distortion (dBc) SFDR fC = 100 kHz, VOUT = 2 V p-p −86 dBc fC = 1 MHz, VOUT = 2 V p-p −66 dBc fC = 2 MHz, VOUT = 2 V p-p −60 dBc f = 5 MHz, V = 2 V p-p −53 dBc C OUT Input Voltage Noise f = 10 Hz 2.4 nV/√Hz f = 100 kHz 1 nV/√Hz Input Current Noise f = 10 Hz 24 pA/√Hz f = 100 kHz 2.94 pA/√Hz 0.1 Hz to 10 Hz Noise G = +101, RF = 1 kΩ, RG = 10 Ω 99 nV p-p DC PERFORMANCE Input Offset Voltage −500 −30 +500 μV Input Offset Voltage Drift 0.2 μV/°C Input Bias Current −17 −11 −4 μA Input Bias Current Drift 3 nA/°C Input Bias Offset Current −0.6 −0.02 +0.6 μA Open-Loop Gain VOUT = 0.5 V to 4.5 V 97 110 dB INPUT CHARACTERISTICS Input Resistance Common mode/differential 10 M/10 k Ω Input Capacitance Common mode/differential 3/11 pF Input Common-Mode Voltage Range 0.1 to 4.1 V Common-Mode Rejection V = +1 V to +4 V −91 −118 dB CM OUTPUT CHARACTERISTICS Overdrive Recovery Time VIN = 0 V to 5 V, G = +2 96 ns +Output Voltage Swing R = 1 kΩ 4.85 4.98 V L −Output Voltage Swing R = 1 kΩ 0.15 0.014 V L +Output Voltage Swing RL = 100 Ω 4.8 4.88 V −Output Voltage Swing RL = 100 Ω 0.2 0.08 Output Current 45 dBc SFDR 70 mA Short-Circuit Current Sinking/sourcing 125 mA Capacitive Load Drive 30% overshoot, G = +2 39 pF POWER SUPPLY Operating Range 3 to 10 V Quiescent Current per Amplifier 2.7 2.9 3.1 mA 0.18 DISABLE = 0 V Positive Power Supply Rejection +VS = 4.5 V to 5.5 V, −VS = 0 V −96 −123 dB Negative Power Supply Rejection +VS = 5 V, −VS = −0.5 V to +0.5 V −96 −121 dB Rev. PrB | Page 5 of 12 ADA4895-2 Preliminary Data Sheet Parameter Conditions Min Typ Max Unit DISABLE PIN DISABLE Voltage Enabled >+VS − 0.5 V Disabled <+VS − 2 V Input Current Enabled DISABLE = +5 V −2.5 μA Disabled −50 μA DISABLE = 0 V Switching Speed Enabled 0.25 μs Disabled 12 μs Rev. PrB | Page 6 of 12 Preliminary Data Sheet ADA4895-2 +3 V SUPPLY TA = 25°C, G = +1, RL = 1 kΩ to midsupply, unless otherwise noted. Table 5. Parameter Conditions Min Typ Max Unit DYNAMIC PERFORMANCE −3 dB Bandwidth G = +10, VOUT = 0.2 V p-p 192 MHz G = +10, VOUT = 1 V p-p 124 MHz G = +20, VOUT = 0.2 V p-p 9.2 MHz Bandwidth for 0.1 dB Flatness G = +10, V = 2 V p-p, R = 100 Ω TBD MHz OUT L Slew Rate G = +10, V = 1 V step 450 V/μs OUT Settling Time to 0.1% G = +10, VOUT = 2 V step TBD ns Settling Time to 0.01% G = +10, VOUT = 2 V step TBD ns NOISE/HARMONIC PERFORMANCE Harmonic Distortion (dBc) SFDR fC = 100 kHz, VOUT = 2 V p-p, G = +2 −85 dBc fC = 1 MHz, VOUT = 1 V p-p, G = −1 −65 dBc fC = 2 MHz, VOUT = 1 V p-p, G = −1 −59 dBc f = 5 MHz, V = 1 V p-p, G = −1 −52 dBc C OUT Input Voltage Noise f = 10 Hz 2.3 nV/√Hz f = 100 kHz 1 nV/√Hz Input Current Noise f = 10 Hz 24 pA/√Hz f = 100 kHz 2.94 pA/√Hz 0.1 Hz to 10 Hz Noise G = +101, R = 1 kΩ, R = 10 Ω 99 nV p-p F G DC PERFORMANCE Input Offset Voltage −500 −30 +500 uV Input Offset Voltage Drift 0.2 μV/°C Input Bias Current −17 −11 −4 μA Input Bias Current Drift 3 nA/°C Input Bias Offset Current −0.6 −0.02 +0.6 μA Open-Loop Gain VOUT = 0.5 V to 2.5 V 95 108 dB INPUT CHARACTERISTICS Input Resistance Common mode/differential 10 M/10 k Ω Input Capacitance Common mode/differential 3/11 pF Input Common-Mode Voltage Range 0.1 to 2.1 V Common-Mode Rejection V = +1.1 V to +1.9 V −90 −124 dB CM OUTPUT CHARACTERISTICS Overdrive Recovery Time VIN = 0 V to +3 V, G = +2 83 ns +Output Voltage Swing R = 1 kΩ 2.85 2.97 V L −Output Voltage Swing R = 1 kΩ 0.15 0.01 V L +Output Voltage Swing RL = 100 Ω 2.8 2.92 V −Output Voltage Swing RL = 100 Ω 0.2 0.05 V Output Current 45 dBc SFDR 60 mA Short-Circuit Current Sinking/sourcing 120 mA Capacitive Load Drive 30% overshoot, G = +2 39 pF POWER SUPPLY Operating Range 3 to 10 V Quiescent Current per Amplifier 2.6 2.8 3 mA 0.15 DISABLE = 0 V Positive Power Supply Rejection +VS = 2.7 V to 3.7 V, −VS = 0 V −96 −121 dB Negative Power Supply Rejection +VS = 3 V, −VS = −0.3 V to 0.7 V −96 −120 dB Rev. PrB | Page 7 of 12 ADA4895-2 Preliminary Data Sheet Parameter Conditions Min Typ Max Unit DISABLE PIN DISABLE Voltage Enabled >+VS −0.5 V Disabled <−VS + 2 V Input Current Enabled DISABLE = +3 V −2.5 μA Disabled −40 μA DISABLE = 0 V Switching Speed Enabled 0.25 μs Disabled 12 μs Rev. PrB | Page 8 of 12 Preliminary Data Sheet ADA4895-2 PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS Figure 3. 10-Lead ADA4895-2 MSOP (10) Table 6. ADA4895-2 Pin Function Descriptions Pin No. Mnemonic Description 1 OUT1 Output 1. 2 −IN1 Inverting Input 1. 3 +IN1 Noninverting Input 1. 4 −VS Negative Supply. 5 DISABLE1 Disable1. 6 DISABLE2 Disable2. 7 +IN2 Noninverting Input 2. 8 −IN2 Inverting Input 2. 9 OUT2 Output 2. 10 +VS Positive Supply. EPAD Exposed Pad. The exposed pad can be connected to GND or left floating. Rev. PrB | Page 9 of 12 ADA4895-2 Preliminary Data Sheet TYPICAL PERFORMANCE CHARACTERISTICS RL = 1 kΩ,unless otherwise noted.When G = +10, RF = 249 Ω. Figure 4. Small Signal Frequency Response vs. Supply Voltage Figure 7. Large Signal Frequency Response vs. Supply Voltage Figure 5. Harmonic Distortion vs. Frequency for various supplies Figure 8. 0.1 dB Bandwidth at Selected RF Value 100 8 V = ±5V V = ±5V S S 7 6 5 10 4 3 2 1 1 0 1 10 100 1k 10k 100k 1M 5M 1 10 100 1k 10k 100k 1M 5M FREQUENCY (Hz) FREQUENCY (Hz) Figure 6. Voltage Noise vs. Frequency Figure 9. Current Noise vs. Frequency Rev. PrB | Page 10 of 12 VOLTAGE NOISE (nV/√Hz) 09447-027 CURRENT NOISE (pA/√Hz) 09447-060 Preliminary Data Sheet ADA4895-2 0 V = +5V 4 S TIME = 100ns/DIV –10 ΔV = 2V p-p S V = +5V S G = +1 V –20 G = +1 3 IN –30 2 –40 –50 –PSRR 1 V OUT –60 –70 0 +PSRR –80 –1 –90 –100 –2 –110 –3 –120 –130 1k 10k 100k 1M 10M 100M –4 FREQUENCY (Hz) Figure 10. Input Overdrive Recovery Figure 12. PSRR vs. Frequency Figure 13. Large Signal Transient Response for Various Gains Figure 11.Small Signal Transient Response for Various Supplies Rev. PrB | Page 11 of 12 INPUT AND OUTPUT VOLTAGE (V) 09447-049 POWER SUPPLY REJECTION (dB) 09447-030 ADA4895-2 Preliminary Data Sheet OUTLINE DIMENSIONS 3.10 3.00 2.90 10 6 5.15 3.10 4.90 3.00 4.65 1 2.90 5 PIN 1 IDENTIFIER 0.50 BSC 0.95 15° MAX 0.85 1.10 MAX 0.75 0.70 0.15 0.23 6° 0.55 0.30 0.05 0.13 0° 0.40 0.15 COPLANARITY 0.10 COMPLIANT TO JEDEC STANDARDS MO-187-BA Figure 14. 10-Lead Mini Small Outline Package [MSOP] (RM-10) Dimensions shown in millimeters ©2011 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. PR10186-0-9/11(PrB) Rev. PrB | Page 12 of 12 091709-A