Dual Low Noise Amplifier Features General Description • Voltage noise of only 4.9nV/√Hz • Current noise of only 1.2pA/√Hz • Bandwidth (-3dB) of 80MHz @AV = +1 • Gain-of-1 stable • Just 4.5mA per amplifier • 8-pin MSOP package • ±2.5V to ±12V operation The EL2228C is a dual, low-noise amplifier, ideally suited to filtering applications in ADSL and HDSLII designs. It feature low noise specification of just 4.9nV/√Hz and 1.2pA/√Hz, making it ideal for processing low voltage waveforms. Applications The EL2228C is available in a space saving 8-Pin MSOP package as well as the industry standard 8-Pin SO. It can operate over the -40°C to +85°C temperature range. • • • • • • ADSL Filters HDSLII Filters Ultrasound input amplifiers Wideband Instrumentation Communications equipment Wideband sensors EL2228C - Preliminary EL2228C - Preliminary The EL2228C has a -3dB bandwidth of 80MHz and is gain-of-1 stable. It also affords minimal power dissipation with a supply current of just 4.5mA per amplifier. The amplifier can be powered from supplies ranging from ±2.5V to ±12V. Ordering Information Temp. Range Package Outline # EL2228CY Part No. 8-Pin MSOP - MDP0043 EL2228CY-T13 8-Pin MSOP 13” MDP0043 EL2228CY-T7 8-Pin MSOP 7” MDP0043 EL2228CS 8-Pin SO - MDP0027 EL2228CS-T13 8-Pin SO 13” MDP0027 EL2228CS-T7 8-Pin SO 7” MDP0027 Connection Diagram VOUTA 1 VINA- 2 VINA+ 3 VS- 4 8 VS+ + 7 VOUTB + 6 VINB5 VINB+ Note: All information contained in this data sheet has been carefully checked and is believed to be accurate as of the date of publication; however, this data sheet cannot be a “controlled document”. Current revisions, if any, to these specifications are maintained at the factory and are available upon your request. We recommend checking the revision level before finalization of your design documentation. © 2001 Elantec Semiconductor, Inc. September 25, 2001 EL2228C 8-Pin SO and 8-Pin MSOP EL2228C - Preliminary EL2228C - Preliminary Dual Low Noise Amplifier Absolute Maximum Ratings (T A = 25°C) Values beyond absolute maximum ratings can cause the device to be prematurely damaged. Absolute maximum ratings are stress ratings only and functional device operation is not implied. Supply Voltage between VS+ and VS+28V Input Voltage VS- - 0.3V, VS +0.3V Maximum Continuous Output Current 40mA Maximum Die Temperature Storage Temperature Operating Temperature Lead Temperature Power Dissipation ESD Voltage +125°C -65°C to +150°C -40°C to +85°C 260°C See Curves 2kV Important Note: All parameters having Min/Max specifications are guaranteed. Typ values are for information purposes only. Unless otherwise noted, all tests are at the specified temperature and are pulsed tests, therefore: TJ = TC = TA Electrical Characteristics VS+= +12V, V S - = -12V, RL = 500Ω and CL = 3pF to 0V, RF = 420Ω & TA = 25°C unless otherwise specified. Parameter Description Condition Min Typ Max 3 Unit Input Characteristics VOS Input Offset Voltage VCM = 0V 0.2 TCVOS Average Offset Voltage Drift [1] -4 IB Input Bias Current VCM = 0V RIN Input Impedance CIN Input Capacitance CMIR Common-Mode Input Range CMRR Common-Mode Rejection Ratio AVOL Open-Loop Gain en Voltage Noise in Current Noise -9 -4.5 -1 8 µA MΩ 1 -11.8 mV µV/°C pF +10.4 V for VIN from -11.8V to +10.4V 60 90 dB for VIN from -10V to +10V 60 75 dB -5V ≤ VOUT ≤ 5V 60 75 dB f = 100kHz 4.9 nV/√Hz f = 100kHz 1.2 pA/√Hz RL = 500Ω -10.3 -10 V RL = 250Ω -9.5 -9 V Output Characteristics VOL VOH ISC Output Swing Low Output Swing High Short Circuit Current RL = 500Ω 10 10.3 RL = 250Ω 9.5 10 V V RL = 10Ω 140 180 mA Power Supply Performance PSRR Power Supply Rejection Ratio VS is moved from ±10.8V to ±13.2V 65 83 IS Supply Current (Per Amplifier) No load 4 5 44 65 dB 6 mA Dynamic Performance SR Slew Rate [2] ±2.5V square wave, measured 25%-75% tS Settling to +0.1% (AV = +1) (AV = +1), VO = 2V step BW -3dB Bandwidth HD2 2nd Harmonic Distortion HD3 3rd Harmonic Distortion V/µs 50 ns 80 MHz f = 1MHz, VO = 2VP-P, RL = 500Ω, AV = 2 -86 dBc f = 1MHz, VO = 2VP-P, RL = 150Ω, AV = 2 -79 dBc f = 1MHz, VO = 2VP-P, RL = 500Ω, AV = 2 -93 dBc f = 1MHz, VO = 2VP-P, RL = 150Ω, AV = 2 -70 dBc 1. Measured over operating temperature range 2. Slew rate is measured on rising and falling edges 2 Dual Low Noise Amplifier Electrical Characteristics VS+= +5V, VS - = -5V, RL = 500Ω and CL = 3pF to 0V, RF = 420Ω & TA = 25°C unless otherwise specified. Parameter Description Condition Min Typ Max 3 Unit Input Characteristics VOS Input Offset Voltage VCM = 0V 0.6 TCVOS Average Offset Voltage Drift [1] 4.9 IB Input Bias Current VCM = 0V RIN Input Impedance CIN Input Capacitance CMIR Common-Mode Input Range CMRR Common-Mode Rejection Ratio AVOL Open-Loop Gain -2.5V ≤ VOUT ≤ 2.5V en Voltage Noise in Current Noise -9 -4.5 -1 6 for VIN from -4.7V to +3.4V µA MΩ 1.2 -4.7 mV µV/°C pF +3.4 V 60 90 dB 60 72 dB f = 100kHz 4.7 nV/√Hz f = 100kHz 1.2 pA/√Hz RL = 500Ω -3.8 -3.5 V RL = 250Ω -3.7 -3.5 V for VIN from -2V to +2V dB Output Characteristics VOL VOH ISC Output Swing Low Output Swing High Short Circuit Current RL = 500Ω 3.5 3.7 RL = 250Ω 3.5 3.6 V V RL = 10Ω 60 100 mA Power Supply Performance PSRR Power Supply Rejection Ratio VS is moved from ±4.5V to ±5.5V 65 83 IS Supply Current (Per Amplifier) No load 3.5 4.5 35 dB 5.5 mA Dynamic Performance SR Slew Rate [2] ±2.5V square wave, measured 25%-75% tS Settling to +0.1% (AV = +1) (AV = +1), VO = 2V step BW -3dB Bandwidth HD2 2nd Harmonic Distortion HD3 3rd Harmonic Distortion 50 V/µs 50 ns 75 MHz f = 1MHz, VO = 2VP-P, RL = 500Ω, AV = 2 -90 dBc f = 1MHz, VO = 2VP-P, RL = 150Ω, AV = 2 -71 dBc f = 1MHz, VO = 2VP-P, RL = 500Ω, AV = 2 -99 dBc f = 1MHz, VO = 2VP-P, RL = 150Ω, AV = 2 -69 dBc 1. Measured over operating temperature range 2. Slew rate is measured on rising and falling edges 3 EL2228C - Preliminary EL2228C - Preliminary Dual Low Noise Amplifier Typical Performance Curves Non-inverting Frequency Response for Various RF Inverting Frequency Response for Various RF 4 4 2 RF=1kΩ 1 RF=420Ω 3 2 Normalized Gain (dB) Normalized Gain (dB) 3 0 -1 RF=200Ω -2 RF=0Ω -3 -4 -5 RF=100Ω 1 -1 RF=1kΩ -2 -3 -5 1M 10M -6 1M 100M VS=±12V AV=-1 RL=500Ω Frequency (Hz) Non-inverting Frequency Response (Gain) Normalized Gain (dB) 2 1 Inverting Frequency Response (Gain) 4 VS=±12V RF=420Ω RL=500Ω AV=+1 3 2 AV=1 0 Normalized Gain (dB) 3 AV=2 -1 AV=10 -2 AV=5 -3 -1 AV=-10 AV=-5 -3 -5 -6 100k 100M AV=-2 -2 -5 10M AV=-1 0 -4 1M VS=±12V RF=420Ω 1 -4 -6 100k 1M Frequency (Hz) Non-inverting Frequency Response (Phase) Inverting Frequency Response (Phase) 135 90 90 45 45 AV=1 0 Phase (°) AV=5 -90 -135 AV=-1 0 AV=2 -45 AV=10 AV=-2 -45 AV=-5 -90 -135 AV=-10 -180 -180 -270 100M 10M Frequency (Hz) 135 -225 100M 10M Frequency (Hz) 4 RF=420Ω 0 -4 VS=±12V AV=+1 RL=500Ω -6 100k Phase (°) EL2228C - Preliminary EL2228C - Preliminary -225 VS=±12V RF=420Ω RL=500Ω -315 100k -270 1M 10M VS=±12V RF=420Ω RL=500Ω -315 100k 100M Frequency (Hz) 1M 10M Frequency (Hz) 4 100M Dual Low Noise Amplifier Typical Performance Curves Non-inverting Frequency Response for Various Input Signal Levels VS=±12V RF=420Ω RL=500Ω AV=+1 3 2 Normalized Gain (dB) Non-inverting Frequency Response for Various RL 4 1 3 2 0 Normalized Gain (dB) 4 VIN=100mV PP -1 VIN=1VPP -2 VIN=2VPP -3 -4 1 RL=1kΩ 0 -1 RL=50Ω -2 RL=150Ω -3 -4 VIN=500mVPP -5 -6 100k 1M VS=±12V AV=+1 RF=420Ω -5 10M -6 100k 100M RL=500Ω 1M Frequency (Hz) Non-inverting Frequency Response for Various CL 4 4 3 2 1 Normalized Gain (dB) Normalized Gain (dB) Non-inverting Frequency Response for Various Output DC Levels 3 CL=30pF 2 0 CL=3pF -1 -2 -3 CL=10pF VS=±12V RF=420Ω RL=500Ω AV=+1 -4 -5 VO=-10 1 VO=0 -1 -2 -3 VS=±12V RF=420Ω RL=500Ω AV=+1 -5 1M -6 100k 100M 10M 0 2.5 4.5 15 VS=±12V RF=420Ω RL=500Ω AV=+1 G=-2 10 G=-5 G=-10 5 G=10 6.5 -3dB Bandwidth vs ±Supply Voltage for Inverting Gains 20 G=2 G=5 8.5 100M 10M G=-1 VS=±12V RF=420Ω RL=500Ω AV=+1 -3dB Bandwidth (MHz) -3dB Bandwidth (MHz) 25 40 20 VO=-5 Frequency (Hz) -3dB Bandwidth vs ±Supply Voltage for Noninverting Gains 60 VO=+5 1M Frequency (Hz) G=1 VO=+10 0 -4 -6 100k 80 100M 10M Frequency (Hz) 10.5 0 2.5 12.5 Supply Voltage (±V) 4.5 6.5 8.5 Supply Voltage (±V) 5 10.5 12.5 EL2228C - Preliminary EL2228C - Preliminary Dual Low Noise Amplifier Typical Performance Curves 1 Peaking vs ±Supply Voltage for Non-inverting Gains Peaking vs ±Supply Voltage for Inverting Gains 0.2 VS=±12V RF=420Ω RL=500Ω AV=+1 0.8 0.6 0.4 0.2 G=-1 0.12 0.08 G=-2 0.04 G=2 0 2.5 VS=±12V RF=420Ω RL=500Ω AV=+1 0.16 Peaking (dB) G=1 Peaking (dB) EL2228C - Preliminary EL2228C - Preliminary G=-10 G=10 4.5 6.5 8.5 10.5 0 2.5 12.5 Supply Voltage (±V) 4.5 6.5 8.5 10.5 Supply Voltage (±V) Small Signal Step Response VS=±12V Small Signal Step Response VS=±2.5V RF=420Ω AV=1 RL=500Ω RF=420Ω AV=1 RL=500Ω 20mV/div 20mV/div 50ns/div 50ns/div Large Signal Step Response VS=±12V Large Signal Step Response VS=±2.5V RF=420Ω AV=1 RL=500Ω RF=420Ω AV=1 RL=500Ω 0.5V/div 0.5V/div 50ns/div 50ns/div 6 12.5 Dual Low Noise Amplifier Typical Performance Curves Group Delay vs Frequency 20 0.2 16 VS=±12V RF=420Ω RL=150Ω AV=2 0.15 AV=2 0.1 8 4 dG (%) or dP (°) Group Delay (ns) 12 Differential Gain/Phase vs DC Input Voltage at 3.58MHz AV=1 0 -4 -8 VS=±12V RF=420Ω AV=1 RL=500Ω -12 -16 dP dG 0.05 0 -0.05 -0.1 -20 1M 10M -0.15 -1 100M 200M -0.5 0.5 0 1 DC Input Voltage (V) Frequency (Hz) Supply Current vs Supply Voltage Closed Loop Output Impedance vs Frequency 13.2 100 12 9.6 Output Impedance (Ω) Supply Current (mA) 10.8 8.4 7.2 6 4.8 3.6 2.4 10 1 0.1 1.2 0 0 1.4 2.8 4.2 5.6 7 8.4 9.8 11.2 12.6 0.01 10k 14 100k VS (±V) CMRR -CMRR (dB) 1M 10M 100M Frequency (Hz) PSRR 100 10 80 -10 60 -30 40 -50 VS- 20 0 10 VS+ -70 VS=±12 100 1k 10k 100k 1M 10M -90 100M Frequency (Hz) 1k 10k 100k 1M Frequency (Hz) 7 10M 100M EL2228C - Preliminary EL2228C - Preliminary Dual Low Noise Amplifier Typical Performance Curves -40 1MHz 2nd and 3rd Harmonic Distortion vs Output Swing (VS=±12V) -50 -60 3rdH -70 -80 -90 -100 1MHz 2nd and 3rd Harmonic Distortion vs Output Swing (VS=±2.5V) -60 2ndH Distortion (dB) Distortion (dB) -50 -70 3rdH -80 -90 2ndH -100 0 4 8 12 16 -110 20 0 0.5 1 Output Swing (VPP) -50 1MHz 2nd and 3rd Harmonic Distortion vs Output Swing (single-ended) -50 Distortion (dBc) Distortion (dBc) 3rd HD 2nd HD -80 -90 -100 VS=±12V AV=2 RF=420Ω -110 -120 0 4 8 12 2 2.5 1MHz 2nd and 3rd Harmonic Distortion vs Output Swing (single-ended) VS=±2.5V AV=2 RF=420Ω -60 -70 1.5 Output Swing (VPP) -60 16 2nd DUT -70 -80 3rd DUT -90 -100 -110 20 0 0.5 1 Output Swing (VPP) 1.5 2 2.5 Output Swing (VPP) Voltage and Current Noise vs Frequency Channel to Channel Isolation vs Frequency 18 0 16 -20 14 12 Gain (dB) Voltage Noise (nV√Hz), Current Noise EL2228C - Preliminary EL2228C - Preliminary 10 8 EN 6 4 0 10 100 -40 B→C -60 -80 IN 2 A→B 1k 10k -100 100k 100k Frequency (Hz) 1M 10M Frequency (Hz) 8 100M Dual Low Noise Amplifier Typical Performance Curves 11 IS vs Tempertaure VS=±12V 100 3dB Bandwidth vs Temperature VS=±5V 90 IS Bandwidth (MHz) 10 9 80 70 60 0 -50 0 50 100 50 -40 150 10 Temperature (mA) 60 110 160 Junction Temperature (°C) IB vs Temperature VOS vs Temperature -2 2 1 IB (µA) VOS (mV) -4 0 -6 -1 -8 -50 0 50 100 -2 0.1 150 1 0.1 Temperature (°C) Package Power Dissipation vs Ambient Temp. JEDEC JESD51-3 Low Effective Thermal Conductivity Test Board 0.7 74 0.6 625mW 72 0.5 Power Dissipation (W) SR (V/µs) SR vs Temperature 76 70 68 66 SO8 160°C/W 486mW 0.4 MSOP8 206°C/W 0.3 0.2 0.1 64 62 -50 10 1 Temperature (°C) 0 50 100 0 150 0 25 50 75 85 100 Ambient Temperature (°C) Temperature (°C) 9 125 150 EL2228C - Preliminary EL2228C - Preliminary EL2228C - Preliminary EL2228C - Preliminary Dual Low Noise Amplifier Pin Descriptions EL2228CY 8-Pin MSOP EL2228CS 8Pin SO Pin Name Pin Function Equivalent Circuit 10 Dual Low Noise Amplifier Applications Information Product Description 11 EL2228C - Preliminary EL2228C - Preliminary EL2228C - Preliminary EL2228C - Preliminary Dual Low Noise Amplifier General Disclaimer Specifications contained in this data sheet are in effect as of the publication date shown. Elantec, Inc. reserves the right to make changes in the circuitry or specifications contained herein at any time without notice. Elantec, Inc. assumes no responsibility for the use of any circuits described herein and makes no representations that they are free from patent infringement. September 25, 2001 WARNING - Life Support Policy Elantec, Inc. products are not authorized for and should not be used within Life Support Systems without the specific written consent of Elantec, Inc. Life Support systems are equipment intended to support or sustain life and whose failure to perform when properly used in accordance with instructions provided can be reasonably expected to result in significant personal injury or death. Users contemplating application of Elantec, Inc. Products in Life Support Systems are requested to contact Elantec, Inc. factory headquarters to establish suitable terms & conditions for these applications. Elantec, Inc.’s warranty is limited to replacement of defective components and does not cover injury to persons or property or other consequential damages. Elantec Semiconductor, Inc. 675 Trade Zone Blvd. Milpitas, CA 95035 Telephone: (408) 945-1323 (888) ELANTEC Fax: (408) 945-9305 European Office: +44-118-977-6020 Japan Technical Center: +81-45-682-5820 12 Printed in U.S.A.