Ultra-low Noise, Low Power, Wideband Amplifier Features General Description • • • • • • • The EL2126C is an ultra-low noise, wideband amplifier that runs on half the supply current of competitive parts. It is intended for use in systems such as ultrasound imaging where a very small signal needs to be amplified by a large amount without adding significant noise. Its low power dissipation enables it to be packaged in the tiny SOT23 package, which further helps systems where many input channels create both space and power dissipation problems. Voltage noise of only 1.3nV/√Hz Current noise of only 1.2pA/√Hz Low offset voltage ≤200µV 90MHz -3dB BW for AV=10 Very low supply current -4.7mA SOT23 package ±5V to ±15V operation Applications • • • • • Ultrasound input amplifiers Wideband instrumentation Communication equipment AGC & PLL active filters Wideband sensors EL2126C - Preliminary EL2126C - Preliminary The EL2126C is stable for gains of 10 and greater and uses traditional voltage feedback. This allows the use of reactive elements in the feedback loop, a common requirement for many filter topologies. It operates from ±5V to ±15V supplies and is available in a 5-pin SOT23 package and 8-pin SO and 8-pin PDIP packages. The EL2126C is fabricated in Elantec’s proprietary complementary bipolar process, and is specified for operation over the full -40°C to +85°C temperature range. Ordering Information Part No EL2126CW Package Tape & Reel Outline # 5-Pin SOT23 MDP0038 EL2126CS 8-Pin SO MDP0027 EL2126CN 8-Pin PDIP MDP0031 Connection Diagrams NC 1 OUT 1 VS- 2 5 VS+ + IN+ 3 - IN+ 3 4 INEL2126C (5-Pin SOT23) IN- 2 8 NC + VS- 4 7 VS+ 6 OUT 5 NC EL2126C (8-Pin SO and 8-Pin PDIP) October 3, 2001 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. EL2126C - Preliminary EL2126C - Preliminary Ultra-low Noise, Low Power, Wideband Amplifier Absolute Maximum Ratings (T VS+ to VSContinuous Output Current Any Input A = 25°C) 33V 40mA VS+ - 0.3V to VS- + 0.3V Power Dissipation Operating Temperature Storage Temperature See Curves -40°C to +85°C -60°C to +150°C 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+ = +5V, VS- = -5V, TA = 25°C, RF = 180Ω, RG = 20Ω, RL = 500Ω unless otherwise specified. Parameter Description Conditions Min Typ Max Unit 0.5 3 mV DC Performance VOS Input Offset Voltage (SO8 & PDIP8) Input Offset Voltage (SOT23-5) 3 TBD mV TCVOS Offset Voltage Temperature Coefficient IB Input Bias Current IOS Input Bias Current Offset 0.13 TCIB Input Bias Current Temperature Coefficient TBD CIN Input Capacitance AVOL Open Loop Gain PSRR Power Supply Rejection Ratio CMRR Common Mode Rejection Ratio CMIR Common Mode Input Range VOUT+ Positive Output Voltage Swing VOUT- Negative Output Voltage Swing -3.7 -4 V VOUTL Output Voltage Swing into 100Ω ±3 ±3.4 V 70 100 -15 VO = ±2.5V IOUT Output Short Circuit Current ISY Supply Current [1] [2] µV/°C -6 µA 0.8 2.2 pF 75 86 dB 70 100 dB 70 85 dB +3.8 V ±3.5 RF = 1kΩ, RL = ∞ [3] µA nA/°C +3.7 V 4.7 mA 5.5 mA AC Performance - VCC = -5V, RG = 20Ω, C L = 3pF BW -3dB Bandwidth, RL = 500Ω 98 BW ±0.1dB ±0.1dB Bandwidth, RL = 500Ω 17 MHz MHz BW ±1dB ±1dB Bandwidth, RL = 500Ω 80 MHz Peaking Peaking, RL = 500Ω SR Slew Rate (±2.5V Square Wave, Measured 20%-80%) OS+ 0.6 dB 120 V/µs Negative Overshoot, 4Vpk-pk Output Square Wave +2.8 % OS- Positive Overshoot, 4Vpk-pk Output Square Wave -7 % TS Settling Time to 0.1% of ±1V Pulse 51 ns VN Voltage Noise Spectral Density 1.3 nV/√Hz IN Current Noise Spectral Density 1.2 pA/√Hz HD2 2nd Harmonic Distortion [4] TBD dBc HD3 3rd Harmonic Distortion [4] TBD dBc THD Total Harmonic Distortion [5] TBD dBc IMD Intermodulation Distortion [6] TBD % TBD 1. Measured by moving the supplies from ±4V to ±6V 2. Measured with the input moving -4.4V to +3.5V 2 3. 4. 5. 6. Pulse test only and using a 10Ω load Frequency = 10MHz, VOUT = 1Vpk-pk, into 100Ω and 5pF load Frequency = 20MHz, VOUT = -20dBm (0.0274VRMS) into 500Ω and 15pF load Two-tone IMD, frequencies = 5MHz and 6MHz at -20dBm output level, RLOAD = 500Ω and 15pF Electrical Characteristics VS+ = +15V, VS- = -15V, TA = 25°C, RF = 180Ω, RG = 20Ω, RL = 500Ω unless otherwise specified. Parameter Description Conditions Min Typ Max Unit -0.5 3 mV DC Performance VOS Input Offset Voltage (SO8 & PDIP8) Input Offset Voltage (SOT23-5) 3 TCVOS Offset Voltage Temperature Coefficient TBD IB Input Bias Current IOS Input Bias Current Offset 0.16 TCIB Input Bias Current Temperature Coefficient TBD CIN Input Capacitance AVOL Open Loop Gain PSRR Power Supply Rejection Ratio CMRR Common Mode Rejection Ratio CMIR -15 mV µV/°C -5 µA 0.7 µA nA/°C 2.2 pF 75 88 dB 65 80 dB 70 85 dB Common Mode Input Range ±13.5 TBD V VOUT Output Voltage Swing ±13.5 ±13.7 V VOUTL+ Positive Output Voltage Swing into 100Ω 10.7 11.7 V VOUTL- Negative Output Voltage Swing into 100Ω -9.5 -10.2 V IOUT Output Short Circuit Current 90 150 mA ISY Supply Current [1] [2] RF = 1kΩ, RL = ∞ [3] 5 6 mA AC Performance - VCC = -5V, RG = 20Ω, C L = 3pF BW -3dB Bandwidth, RL = 500Ω 136 BW ±0.1dB ±0.1dB Bandwidth, RL = 500Ω 26 MHz MHz BW ±1dB ±1dB Bandwidth, RL = 500Ω 60 MHz Peaking Peaking, RL = 500Ω SR Slew Rate (±2.5V Square Wave, Measured 25%-75%) OS+ 2.1 dB 150 V/µS Positive Overshoot, 4Vpk-pk Output Square Wave 1.6 % OS- Negative Overshoot, 4Vpk-pk Output Square Wave -4.4 % TS Settling Time to 0.1% of ±1V Pulse 48 ns VN Voltage Noise Spectral Density 1.4 nV/√Hz IN Current Noise Spectral Density 1.1 pA/√Hz HD2 2nd Harmonic Distortion [4] TBD dBc HD3 3rd Harmonic Distortion [4] TBD dBc THD Total Harmonic Distortion [5] TBD dBc IMD Intermodulation Distortion [6] TBD % 1. 2. 3. 4. 5. TBD Measured by moving the supplies from ±13.5V to ±16.5V Measured with the input moving -14.4V to +13.8V Pulse test only and using a 10Ω load Frequency = 10MHz, VOUT = 1Vpk-pk, into 100Ω and 5pF load Frequency = 20MHz, VOUT = -20dBm (0.0274VRMS) into 500Ω and 15pF load 3 EL2126C - Preliminary EL2126C - Preliminary Ultra-low Noise, Low Power, Wideband Amplifier EL2126C - Preliminary EL2126C - Preliminary Ultra-low Noise, Low Power, Wideband Amplifier 6. Two-tone IMD, frequencies = 5MHz and 6MHz at -20dBm output level, RLOAD = 500Ω and 15pF 4 Typical Performance Curves Non-Inverting Frequency Response for Various R F Non-Inverting Frequency Response for Various RF 10 10 Normalized Gain (dB) RF=1kΩ RF=500Ω 2 -2 RF=180Ω -6 10M -2 RF=180Ω RF=100Ω -10 1M 100M 10M Inverting Frequency Response for Various RF 8 8 4 RF=500Ω 4 RF=350Ω 0 RF=200Ω -4 VS=±15V AV=-10 CL=5pF RL=500Ω RF=1kΩ Normalized Gain (dB) VS=±5V AV=-10 CL=5pF RL=500Ω 100M Frequency (Hz) Inverting Frequency Response for Various RF Normalized Gain (dB) RF=500Ω 2 Frequency (Hz) RF=100Ω -8 RF=1kΩ RF=500Ω RF=350Ω 0 RF=200Ω -4 RF=100Ω -8 -12 1M 10M -12 1M 100M 10M Frequency (Hz) Non-Inverting Frequency Response for Various Gain 10 10 VS=±5V RG=20Ω RL=500Ω CL=5pF 6 2 AV=10 AV=20 -2 AV=50 -6 -10 1M Normalized Gain (dB) 6 100M Frequency (Hz) Non-Inverting Frequency Response for Various Gain Normalized Gain (dB) RF=1kΩ -6 RF=100Ω -10 1M VS=±15V AV=10 CL=5pF RL=500Ω 6 Normalized Gain (dB) VS=±5V AV=10 CL=5pF RL=500Ω 6 10M VS=±15V RG=20Ω RL=500Ω CL=5pF AV=10 2 AV=20 -2 AV=50 -6 -10 1M 100M Frequency (Hz) 10M Frequency (Hz) 5 100M EL2126C - Preliminary EL2126C - Preliminary Ultra-low Noise, Low Power, Wideband Amplifier Ultra-low Noise, Low Power, Wideband Amplifier Typical Performance Curves Inverting Frequency Response for Various Gain Normalized Gain (dB) 4 Inverting Frequency Response for Various RF 8 VS=±5V CL=5pF RG=35Ω 4 0 Normalized Gain (dB) 8 AV=10 -4 AV=50 AV=20 -8 VS=±15V CL=5pF RG=20Ω 0 AV=10 -4 AV=50 10M -12 1M 100M 10M Frequency (Hz) Normalized Gain (dB) 4 Non-Inverting Frequency Response for Various Output Signal Levels VS=±5V CL=5V RL=500Ω RF=180Ω AV=10 -4 10 6 VO=500mVPP 0 VO=30mVPP VO=5VPP VO=2.5VPP -8 -12 1M Non-Inverting Frequency Response for Various Output Signal Levels VS=±15V CL=5pF RL=500Ω RF=180Ω AV=10 VO=1VPP -2 VO=10VPP VO=5VPP -10 1M 100M Frequency (Hz) 8 VO=30mVPP VO=500mVPP 2 -6 VO=1VPP 10M 100M Frequency (Hz) Normalized Gain (dB) 8 AV=20 -8 -12 1M VO=2.5VPP 10M Inverting Frequency Response for Various Output Signal Levels 8 Inverting Frequency Response for Various Output Signal Levels VO=1VPP VO=500mVPP 4 VO=30mVPP Normalized Gain (dB) 4 0 VO=3.4VPP -4 -8 VS=±5V CL=5p RL=500Ω RF=350Ω AV=10 -12 1M VO=2.5VPP 10M 100M Frequency (Hz) VO=500mVPP Normalized Gain (dB) EL2126C - Preliminary EL2126C - Preliminary VO=1VPP 0 VO=3.4VPP -4 -8 VS=±15V CL=5pF RL=500Ω RF=200Ω AV=10 -12 1M 100M Frequency (Hz) VO=2.5VPP 10M Frequency (Hz) 6 VO=30mVPP 100M Typical Performance Curves Non-Inverting Frequency Response for Various CL Non-Inverting Frequency Response for Various CL 10 10 VS=±5V RF=180Ω AV=10 RL=500Ω CL=28pF CL=11pF 2 CL=16pF CL=5pF -2 CL=1pF -6 -10 1M VS=±15V RF=180Ω AV=10 RL=500Ω 6 Normalized Gain (dB) Normalized Gain (dB) 6 CL=16pF CL=5pF -2 CL=1.2pF -6 10M -10 1M 100M 10M 100M Frequency (Hz) Inverting Frequency Response for Various CL Inverting Frequency Response for Various CL 8 8 VS=±5V RF=350Ω RL=500Ω AV=-10 4 CL=16pF 0 CL=11pF -4 CL=5pF CL=1.2pF -8 -12 1M 10M CL=11pF CL=5pF CL=1.2pF -8 -12 1M 100M 10M Frequency (Hz) 80 150 60 50 40 -50 20 -150 Open Loop Phase (°) 250 -250 10M 100M Supply Current (µA) Supply Current vs Supply Voltage 100 1M CL=16pF -4 Open Loop Gain/Phase 100k CL=29pF 0 Frequency (Hz) 0 10k VS=±15V RF=200Ω RL=500Ω AV=-10 CL=28pF Normalized Gain (dB) 4 Normalized Gain (dB) CL=11pF 2 Frequency (Hz) Open Loop Gain (dB) CL=28pF 0.6/div 0 1G 0 Frequency (Hz) 7 1.5/div Supply Voltage (V) 100M EL2126C - Preliminary EL2126C - Preliminary Ultra-low Noise, Low Power, Wideband Amplifier Ultra-low Noise, Low Power, Wideband Amplifier Typical Performance Curves Bandwidth vs Vs 160 120 AV=-10 AV=10 100 80 AV=-20 60 40 AV=-20 0 AV=-50 0 2 AV=50 4 6 8 10 12 14 2.0 AV=10 1.5 1.0 AV=-10 0.5 AV=-50 20 RG=20Ω RL=500Ω CL=5pF 2.5 Peaking (dB) -3dB Bandwidth Peaking vs Vs 3.0 RG=20Ω RL=500Ω CL=5pF 140 0 16 0 2 4 8 12 10 14 16 Small Signal Step Response Large Signal Step Response VS=±5V VO=2VPP 6 ±Supply Voltage (V) ±VS (V) RF=180Ω RG=20Ω VS=±5V VO=100mVPP 20mV/div 0.5V/div RF=180Ω RG=20Ω 10ns/div 10ns/div 1MHz Harmonic Distortion vs Output Swing -30.0 VS=±5V VO=2VP-P RF=180Ω AV=10 RL=500Ω -50.0 -60.0 1MHz Harmonic Distortion vs Output Swing 2nd H -70.0 -80.0 3rd H -90.0 -100.0 VS=±5V VO=2VP-P RF=180Ω AV=10 RL=500Ω -40.0 Harmonic Distortion (dBc) -40.0 Harmonic Distortion (dBc) EL2126C - Preliminary EL2126C - Preliminary -50.0 2nd H -60.0 -70.0 3rd H -80.0 -90.0 0 1 2 3 4 5 6 7 -100.0 8 VOUT (VP-P) 0 5 10 15 VOUT (VP-P) 8 20 25 Typical Performance Curves Total Harmonic Distortion vs Frequency Noise vs Frequency -20 10 VS=±5V VO=2VP-P IN (pA/√Hz), VN (nV/√Hz) -30 THD (dBc) -40 -50 -60 -70 IN, VS=±5V VN, VS=±15V VN, VS=±5V -80 -90 1k 100k 10k 1M 10M 1 10 100M IN, VS=±15V 1k 100 Settling Time vs Accuracy 16 Settling Time (ns) VS =± 40 VS = 30 VS =± 20 ±5V , 15V, 5V, V O =5V P-P 15V, VO = VO =2 VO =5 100M 400M AV=10 VP-P 2VP -P VP-P 8 4 AV=-10 0 10 0 0.1 VS=±5V RL=500Ω 12 Group Delay (ns) VS =± 50 100k Group Delay vs Frequency 70 60 10k Frequency (Hz) Frequency (Hz) 1.0 -4 1M 10.0 10M Accuracy (%) Frequency (Hz) CMRR vs Frequency PSRR vs Frequency -10 110 -30 90 -50 70 PSRR (dB) CMRR (dB) VS=±5V -70 -90 -110 10 50 PSRR- PSRR+ 30 100 1k 10k 100k 1M 10M 10 10k 100M Frequency (Hz) 100k 1M Frequency (Hz) 9 10M 200M EL2126C - Preliminary EL2126C - Preliminary Ultra-low Noise, Low Power, Wideband Amplifier Ultra-low Noise, Low Power, Wideband Amplifier Typical Performance Curves Closed Loop Output Impedance vs Frequency Bandwidth and Peaking vs Temperature 120 VS=±5V 3.5 VS=±5V 3 100 2.5 Bandwidth (MHz) 10 1 2 60 1.5 1 40 0.5 0.1 0.01 10k 80 20 100k 1M 10M 0 -40 100M 0 0 40 80 Temperature Frequency (Hz) 10 120 160 -0.5 Peaking (dB) 100 Closed Loop Output Impedance (Ω) EL2126C - Preliminary EL2126C - Preliminary EL2126C - Preliminary EL2126C - Preliminary Ultra-low Noise, Low Power, Wideband 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. October 3, 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 11 Printed in U.S.A.