ADA4895-2ARMZ

FUNCTIONAL BLOCK DIAGRAMS Low wideband noise 1 nV/√Hz 1.6 pA/√Hz Low 1/f noise: 2 nV/√Hz at 10 Hz Low distortion (SFDR): −96 dBc at 100 kHz, VOUT = 2 V p-p Low power: 3 mA per amplifier Low input offset voltage: 350 µV maximum High speed 236 MHz, −3 dB bandwidth (G = +10) 943 V/µs slew rate 22 ns settling time to 0.1% Rail-to-rail output Wide supply range: 3 V to 10 V Disable feature NC 1 8 –IN 2 7 +VS +IN 3 6 OUT 5 NC –VS 4 ADA4895-1 DISABLE 10186-102 FEATURES NC = NO CONNECT. DO NOT CONNECT TO THIS PIN. Figure 1. ADA4895-1 Single Amplifier (8-Lead SOIC) OUT1 1 10 +VS –IN1 2 9 OUT2 +IN1 3 8 –IN2 –VS 4 7 +IN2 6 DISABLE2 ADA4895-2 DISABLE1 5 10186-001 Data Sheet Low Power, 1 nV/√Hz, G ≥ 10 Stable, Railto-Rail Output Amplifier ADA4895-1/ADA4895-2 Figure 2. ADA4895-2 Dual Amplifier (10-Lead MSOP) 5 30 4 24 3 18 2 12 Low noise preamplifier Ultrasound amplifiers PLL loop filters High performance analog-to-digital converter (ADC) drivers Digital-to-analog converter (DAC) buffers GENERAL DESCRIPTION The ADA4895-1/ADA4895-2 have a small signal bandwidth of 236 MHz at a gain of +10 with a slew rate of 943 V/µs, and settle to 0.1% in 22 ns. The wide supply voltage range (3 V to 10 V) of the ADA4895-1/ADA4895-2 make these amplifiers ideal candidates for systems that require large dynamic range, high gain, precision, and high speed. The ADA4895-1 is available in 8-lead SOIC and 6-lead SOT-23 packages, and the ADA4895-2 is available in a 10-lead MSOP package. All packages operate over the extended industrial temperature range of −40°C to +125°C. Rev. B 6 CURRENT 0 1 10 100 1k 10k 100k 0 1M FREQUENCY (Hz) 10186-002 The ADA4895-1 (single) and ADA4895-2 (dual) are high speed voltage feedback amplifiers that are gain ≥ 10 stable with low input noise, rail-to-rail output, and a quiescent current of 3 mA per amplifier. With a 1/f noise of 2 nV/√Hz at 10 Hz and a spuriousfree dynamic range (SFDR) of −72 dBc at 2 MHz, the ADA4895-1/ ADA4895-2 are an ideal solution in a variety of applications, including ultrasound, low noise preamplifiers, and drivers of high performance ADCs. The Analog Devices, Inc., proprietary next generation SiGe bipolar process and innovative architecture enables the high performance of these amplifiers. VOLTAGE 1 INPUT CURRENT NOISE (pA/√Hz) INPUT VOLTAGE NOISE (nV/√Hz) APPLICATIONS Figure 3. Input Voltage and Current Noise vs. Frequency Table 1. Other Low Noise Amplifiers1 Part Number(s) AD8021 AD8045 AD8099 ADA4841-1/ADA4841-2 ADA4896-2 ADA4897-1/ADA4897-2 ADA4898-1/ADA4898-2 ADA4899-1 1 ven at 100 kHz Bandwidth Supply (nV/√Hz) 2.1 3 0.95 2.1 1 1 0.9 1 (MHz) 490 1000 510 80 230 230 65 600 Voltage (V) 5 to 24 3.3 to 12 5 to 12 2.7 to 12 3 to 10 3 to 10 10 to 32 5 to 12 See www.analog.com for the latest selection of low noise amplifiers. COMPANION PRODUCTS ADCs: AD7944 (14-bit), AD7985 (16-bit), AD7986 (18-bit) Additional companion products on the ADA4895-1/ADA4895-2 product page 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. 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Technical Support www.analog.com ADA4895-1/ADA4895-2 Data Sheet TABLE OF CONTENTS Features .............................................................................................. 1 Theory of Operation ...................................................................... 16 Applications ....................................................................................... 1 Amplifier Description................................................................ 16 General Description ......................................................................... 1 Input Protection ......................................................................... 16 Functional Block Diagrams ............................................................. 1 Disable Operation ...................................................................... 16 Companion Products ....................................................................... 1 DC Errors .................................................................................... 17 Revision History ............................................................................... 2 Bias Current Cancellation ......................................................... 17 Specifications..................................................................................... 3 Noise Considerations ................................................................. 18 ±5 V (or +10 V) Supply ............................................................... 3 Applications Information .............................................................. 19 ±2.5 V (or +5 V) Supply .............................................................. 4 Using the ADA4895-1/ADA4895-2 at a Gain < +10 .............. 19 ±1.5 V (or +3 V) Supply .............................................................. 5 High Gain Bandwidth Application .......................................... 20 Absolute Maximum Ratings ............................................................ 7 Feedback Capacitor Application .............................................. 20 Thermal Resistance ...................................................................... 7 Wideband Photomultiplier Preamplifier ................................ 21 Maximum Power Dissipation ..................................................... 7 Layout Considerations ............................................................... 22 ESD Caution .................................................................................. 7 Outline Dimensions ....................................................................... 23 Pin Configurations and Function Descriptions ........................... 8 Ordering Guide .......................................................................... 24 Typical Performance Characteristics ........................................... 10 REVISION HISTORY 4/15—Rev. A to Rev. B Changes to Amplifier Description Section ................................. 16 Changes to Ordering Guide .......................................................... 24 12/12—Rev. 0 to Rev. A Added ADA4895-1 ............................................................. Universal Changes to Features Section, General Description Section, and Table 1 ............................................................................................................. 1 Added Figure 1; Renumbered Sequentially .................................. 1 Changes to Table 2 ............................................................................ 3 Changes to Table 3 ............................................................................ 4 Changes to Table 4 ............................................................................ 5 Changes to Figure 4 .......................................................................... 7 Added Figure 5, Table 7, Figure 6, and Table 8 ............................. 8 Added Figure 14 and Figure 17..................................................... 11 Changes to Figure 24 ...................................................................... 12 Added Figure 26 and Figure 29..................................................... 13 Changes to Amplifier Description Section ................................. 16 Changes to Noise Considerations Section .................................. 18 Added Feedback Capacitor Applications Section and Figure 54 .......................................................................................... 20 Updated Outline Dimensions ....................................................... 23 Changes to Ordering Guide .......................................................... 24 9/12—Revision 0: Initial Version Rev. B | Page 2 of 24 Data Sheet ADA4895-1/ADA4895-2 SPECIFICATIONS ±5 V (OR +10 V) SUPPLY TA = 25°C, G = +10, RF = 249 Ω, RL = 1 kΩ to midsupply, 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/HARMONIC PERFORMANCE Harmonic Distortion (SFDR) Input Voltage Noise Input Current Noise 0.1 Hz to 10 Hz Noise DC PERFORMANCE Input Offset Voltage Input Offset Voltage Drift Input Bias Current Input Bias Current Drift Input Bias Offset Current Open-Loop Gain INPUT CHARACTERISTICS Input Resistance Input Capacitance Input Common-Mode Voltage Range Common-Mode Rejection OUTPUT CHARACTERISTICS Output Overdrive Recovery Time Positive Output Voltage Swing Negative Output Voltage Swing Linear Output Current Short-Circuit Current Capacitive Load Drive POWER SUPPLY Operating Range Quiescent Current per Amplifier Positive Power Supply Rejection Negative Power Supply Rejection Test Conditions/Comments Min Typ Max Unit VOUT = 0.2 V p-p VOUT = 2 V p-p VOUT = 0.2 V p-p, G = +20, RF = 1 kΩ VOUT = 2 V p-p, RL = 100 Ω VOUT = 6 V step VOUT = 2 V step 236 146 115 8.9 943 22 MHz MHz MHz MHz V/µs ns fC = 100 kHz, VOUT = 2 V p-p fC = 1 MHz, VOUT = 2 V p-p fC = 2 MHz, VOUT = 2 V p-p fC = 5 MHz, VOUT = 2 V p-p f = 10 Hz, G = +25.9 f = 100 kHz, G = +25.9 f = 10 Hz, RF = 10 kΩ, RG = 1.1 kΩ, RS = 1 kΩ f = 100 kHz, RF = 10 kΩ, RG = 1.1 kΩ, RS = 1 kΩ G = +101, RF = 1 kΩ, RG = 10 Ω −96 −78 −72 −64 2 1 14 1.6 99 dBc dBc dBc dBc nV/√Hz nV/√Hz pA/√Hz pA/√Hz nV p-p −350 −0.6 100 +53 0.15 −11 1.2 −0.02 110 −100 10 M/10 k 3/11 −4.9 to +4.1 −109 Ω pF V dB 80 4.96 4.77 −4.97 −4.85 80 116/111 6 ns V V V V mA rms mA pF −16 VOUT = −4 V to +4 V Common mode/differential mode Common mode/differential mode VCM = −2 V to +2 V VIN = −0.55 V to +0.55 V RL = 1 kΩ RL = 100 Ω RL = 1 kΩ RL = 100 Ω SFDR = −45 dBc Sinking/sourcing 30% overshoot 4.85 4.5 −4.85 −4.5 2.8 DISABLEx = −5 V +VS = 4 V to 6 V, −VS = −5 V +VS = 5 V, −VS = −4 V to −6 V Rev. B | Page 3 of 24 −98 −98 3 to 10 3 0.1 −136 −135 +350 −6 +0.6 3.2 µV µV/°C µA nA/°C µA dB V mA mA dB dB ADA4895-1/ADA4895-2 Parameter DISABLEx PIN DISABLEx Voltage Input Current per Amplifier Device Enabled Device Disabled Switching Speed Device Enabled Device Disabled Data Sheet Test Conditions/Comments Min Typ Max Unit Device enabled Device disabled >+VS − 0.5 +VS − 0.5 +VS − 0.5