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EL2126C - Preliminary
EL2126C - Preliminary
Ultra-low Noise, Low Power, Wideband Amplifier
Features
* * * * * * * Voltage noise of only 1.3nV/Hz Current noise of only 1.2pA/Hz Low offset voltage 200V 90MHz -3dB BW for AV=10 Very low supply current -4.7mA SOT23 package 5V to 15V operation
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. 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 -40C to +85C temperature range.
Applications
* * * * * Ultrasound input amplifiers Wideband instrumentation Communication equipment AGC & PLL active filters Wideband sensors
Ordering Information
Part No EL2126CW EL2126CS EL2126CN Package 5-Pin SOT23 8-Pin SO 8-Pin PDIP Tape & Reel Outline # MDP0038 MDP0027 MDP0031
Connection Diagrams
NC 1 OUT 1 VS- 2 IN+ 3 EL2126C (5-Pin SOT23) 5 VS+ IN- 2 IN+ 3 4 INVS- 4 EL2126C (8-Pin SO and 8-Pin PDIP)
8 NC 7 VS+ 6 OUT 5 NC
+
+
-
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.
(c) 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
= 25C)
33V 40mA VS+ - 0.3V to VS- + 0.3V
Power Dissipation Operating Temperature Storage Temperature
See Curves -40C to +85C -60C to +150C
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 = 25C, RF = 180, RG = 20, RL = 500 unless otherwise specified. Parameter DC Performance VOS TCVOS IB IOS TCIB CIN AVOL PSRR CMRR CMIR VOUT+ VOUTVOUTL IOUT ISY BW BW 0.1dB BW 1dB Peaking SR OS+ OSTS VN IN HD2 HD3 THD IMD Input Offset Voltage (SO8 & PDIP8) Input Offset Voltage (SOT23-5) Offset Voltage Temperature Coefficient Input Bias Current Input Bias Current Offset Input Bias Current Temperature Coefficient Input Capacitance Open Loop Gain Power Supply Rejection Ratio Common Mode Input Range Positive Output Voltage Swing Negative Output Voltage Swing Output Voltage Swing into 100 Output Short Circuit Current Supply Current -3dB Bandwidth, RL = 500 0.1dB Bandwidth, RL = 500 1dB Bandwidth, RL = 500 Peaking, RL = 500 Slew Rate (2.5V Square Wave, Measured 20%-80%) Negative Overshoot, 4Vpk-pk Output Square Wave Positive Overshoot, 4Vpk-pk Output Square Wave Settling Time to 0.1% of 1V Pulse Voltage Noise Spectral Density Current Noise Spectral Density 2nd Harmonic Distortion 3rd Harmonic Distortion
[4] [4] [5] [6] [3] [1] [2]
Description
Conditions
Min
Typ 0.5 TBD
Max 3 3
Unit mV mV V/C A
-15
-6 0.13 TBD 2.2 0.8
A nA/C pF dB dB dB V V V V mA
VO = 2.5V
75 70 70 3.5
86 100 85 +3.8 -4 3.4 100 4.7 98 17 80 0.6 5.5
Common Mode Rejection Ratio
RF = 1k, RL =
+3.7 -3.7 3 70
mA MHz MHz MHz dB V/s % % ns nV/Hz pA/Hz dBc dBc dBc %
AC Performance - VCC = -5V, RG = 20, C L = 3pF
TBD
120 +2.8 -7 51 1.3 1.2 TBD TBD TBD TBD
Total Harmonic Distortion Intermodulation Distortion
1. Measured by moving the supplies from 4V to 6V 2. Measured with the input moving -4.4V to +3.5V
2
EL2126C - Preliminary
EL2126C - Preliminary
Ultra-low Noise, Low Power, Wideband Amplifier
3. 4. 5. 6. Pulse test only and using a 10 load Frequency = 10MHz, VOUT = 1Vpk-pk, into 100 and 5pF load Frequency = 20MHz, VOUT = -20dBm (0.0274VRMS) into 500 and 15pF load Two-tone IMD, frequencies = 5MHz and 6MHz at -20dBm output level, RLOAD = 500 and 15pF
Electrical Characteristics
VS+ = +15V, VS- = -15V, TA = 25C, RF = 180, RG = 20, RL = 500 unless otherwise specified. Parameter DC Performance VOS TCVOS IB IOS TCIB CIN AVOL PSRR CMRR CMIR VOUT VOUTL+ VOUTLIOUT ISY BW BW 0.1dB BW 1dB Peaking SR OS+ OSTS VN IN HD2 HD3 THD IMD 1. 2. 3. 4. 5. Input Offset Voltage (SO8 & PDIP8) Input Offset Voltage (SOT23-5) Offset Voltage Temperature Coefficient Input Bias Current Input Bias Current Offset Input Bias Current Temperature Coefficient Input Capacitance Open Loop Gain Power Supply Rejection Ratio Common Mode Input Range Output Voltage Swing Positive Output Voltage Swing into 100 Negative Output Voltage Swing into 100 Output Short Circuit Current Supply Current -3dB Bandwidth, RL = 500 0.1dB Bandwidth, RL = 500 1dB Bandwidth, RL = 500 Peaking, RL = 500 Slew Rate (2.5V Square Wave, Measured 25%-75%) Positive Overshoot, 4Vpk-pk Output Square Wave Negative Overshoot, 4Vpk-pk Output Square Wave Settling Time to 0.1% of 1V Pulse Voltage Noise Spectral Density Current Noise Spectral Density 2nd Harmonic Distortion 3rd Harmonic Distortion
[4] [4] [5] [6] [3] [1] [2]
Description
Conditions
Min
Typ -0.5 TBD
Max 3 3
Unit mV mV V/C A
-15
-5 0.16 TBD 2.2 0.7
A nA/C pF dB dB dB V V V V mA
75 65 70 13.5 13.5 RF = 1k, RL = 10.7 -9.5 90
88 80 85 TBD 13.7 11.7 -10.2 150 5 136 26 60 2.1 6
Common Mode Rejection Ratio
mA MHz MHz MHz dB V/S % % ns nV/Hz pA/Hz dBc dBc dBc %
AC Performance - VCC = -5V, RG = 20, C L = 3pF
TBD
150 1.6 -4.4 48 1.4 1.1 TBD TBD TBD TBD
Total Harmonic Distortion Intermodulation Distortion
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 10 load Frequency = 10MHz, VOUT = 1Vpk-pk, into 100 and 5pF load Frequency = 20MHz, VOUT = -20dBm (0.0274VRMS) into 500 and 15pF load
3
EL2126C - Preliminary
EL2126C - Preliminary
Ultra-low Noise, Low Power, Wideband Amplifier
6. Two-tone IMD, frequencies = 5MHz and 6MHz at -20dBm output level, RLOAD = 500 and 15pF
4
EL2126C - Preliminary
EL2126C - Preliminary
Ultra-low Noise, Low Power, Wideband Amplifier
Typical Performance Curves
Non-Inverting Frequency Response for Various R F 10 6 Normalized Gain (dB) 2 -2 -6 -10 1M RF=180 RF=100 VS=5V AV=10 CL=5pF RL=500 RF=1k Normalized Gain (dB) RF=500 10 6 2 -2 -6 -10 1M RF=180 RF=100 VS=15V AV=10 CL=5pF RL=500 RF=1k RF=500 Non-Inverting Frequency Response for Various RF
10M Frequency (Hz)
100M
10M Frequency (Hz)
100M
Inverting Frequency Response for Various RF 8 4 Normalized Gain (dB) 0 -4 -8 -12 1M RF=200 RF=100 VS=5V AV=-10 CL=5pF RL=500 RF=500 RF=350 RF=1k 4 Normalized Gain (dB) 0 -4 -8 8
Inverting Frequency Response for Various RF VS=15V AV=-10 CL=5pF RL=500 RF=1k RF=500 RF=350
RF=200 RF=100
10M Frequency (Hz)
100M
-12 1M
10M Frequency (Hz)
100M
Non-Inverting Frequency Response for Various Gain 10 6 Normalized Gain (dB) 2 -2 -6 -10 1M AV=50 VS=5V RG=20 RL=500 CL=5pF AV=10 AV=20 10 6 Normalized Gain (dB) 2 -2
Non-Inverting Frequency Response for Various Gain
VS=15V RG=20 RL=500 CL=5pF
AV=10
AV=20 AV=50
-6 -10 1M
10M Frequency (Hz)
100M
10M Frequency (Hz)
100M
5
EL2126C - Preliminary
EL2126C - Preliminary
Ultra-low Noise, Low Power, Wideband Amplifier
Typical Performance Curves
Inverting Frequency Response for Various Gain 8 4 Normalized Gain (dB) 0 -4 -8 -12 1M VS=5V CL=5pF RG=35 Normalized Gain (dB) 8 4 0 -4 -8 -12 1M Inverting Frequency Response for Various RF VS=15V CL=5pF RG=20
AV=10 AV=50
AV=10 AV=50 AV=20
AV=20
10M Frequency (Hz)
100M
10M Frequency (Hz)
100M
8 4 Normalized Gain (dB) 0 -4 -8
Non-Inverting Frequency Response for Various Output Signal Levels VS=5V CL=5V RL=500 RF=180 AV=10
10 6
Non-Inverting Frequency Response for Various Output Signal Levels VS=15V CL=5pF RL=500 RF=180 AV=10
VO=30mVPP VO=500mVPP VO=1VPP
VO=500mVPP
VO=30mVPP
Normalized Gain (dB)
2 -2 -6 -10 1M
VO=5VPP VO=2.5VPP VO=1VPP 10M Frequency (Hz) Inverting Frequency Response for Various Output Signal Levels VO=500mVPP 100M
VO=10VPP VO=5VPP VO=2.5VPP 10M Frequency (Hz) Inverting Frequency Response for Various Output Signal Levels VO=500mVPP 100M
-12 1M
8 4 Normalized Gain (dB)
8 4 Normalized Gain (dB)
VO=1VPP 0 -4 -8 VS=5V CL=5p RL=500 RF=350 AV=10 VO=3.4VPP VO=2.5VPP
VO=30mVPP
VO=1VPP 0 -4 -8 VS=15V CL=5pF RL=500 RF=200 AV=10 VO=3.4VPP VO=2.5VPP
VO=30mVPP
-12 1M
10M Frequency (Hz)
100M
-12 1M
10M Frequency (Hz)
100M
6
EL2126C - Preliminary
EL2126C - Preliminary
Ultra-low Noise, Low Power, Wideband Amplifier
Typical Performance Curves
Non-Inverting Frequency Response for Various CL 10 6 Normalized Gain (dB) 2 -2 -6 -10 1M VS=5V RF=180 AV=10 RL=500 CL=11pF CL=5pF CL=1pF 10 6 Normalized Gain (dB) 2 -2 -6 -10 1M CL=5pF CL=1.2pF VS=15V RF=180 AV=10 RL=500 CL=28pF CL=16pF CL=11pF Non-Inverting Frequency Response for Various CL
CL=28pF CL=16pF
10M Frequency (Hz)
100M
10M Frequency (Hz)
100M
Inverting Frequency Response for Various CL 8 4 Normalized Gain (dB) 0 CL=11pF -4 -8 -12 1M CL=5pF CL=1.2pF VS=5V RF=350 RL=500 AV=-10 CL=28pF CL=16pF Normalized Gain (dB) 4 0 8
Inverting Frequency Response for Various CL VS=15V RF=200 RL=500 AV=-10
CL=29pF CL=16pF
CL=11pF -4 -8 -12 1M CL=5pF CL=1.2pF
10M Frequency (Hz)
100M
10M Frequency (Hz)
100M
Open Loop Gain/Phase 100 80 Open Loop Gain (dB) 60 40 20 0 10k 250 150 Open Loop Phase () 50 -50 -150 -250 100k 1M 10M 100M 1G Frequency (Hz) Supply Current (A)
Supply Current vs Supply Voltage
0.6/div
0 0 1.5/div Supply Voltage (V)
7
EL2126C - Preliminary
EL2126C - Preliminary
Ultra-low Noise, Low Power, Wideband Amplifier
Typical Performance Curves
Bandwidth vs Vs 160 140 120 -3dB Bandwidth 100 80 60 40 20 0 0 AV=-50 AV=-50 2 4 6 8 VS (V) Large Signal Step Response VS=5V VO=2VPP RF=180 RG=20 VS=5V VO=100mVPP 0.5V/div 20mV/div RF=180 RG=20 10 12 AV=50 14 16 AV=-20 AV=-20 RG=20 RL=500 CL=5pF 3.0 AV=-10 AV=10 Peaking (dB) 2.5 2.0 1.5 1.0 0.5 0 AV=-10 AV=10 Peaking vs Vs RG=20 RL=500 CL=5pF
0
2
4
6
8
10
12
14
16
Supply Voltage (V) Small Signal Step Response
10ns/div
10ns/div
1MHz Harmonic Distortion vs Output Swing -40.0 -50.0 Harmonic Distortion (dBc) -60.0 -70.0 -80.0 -90.0 -100.0 3rd H VS=5V VO=2VP-P RF=180 AV=10 RL=500 -30.0 -40.0 2nd H Harmonic Distortion (dBc) -50.0 -60.0 -70.0 -80.0 -90.0 0 1 2 3 4 VOUT (VP-P) 5 6 7 8 -100.0
1MHz Harmonic Distortion vs Output Swing VS=5V VO=2VP-P RF=180 AV=10 RL=500
2nd H
3rd H
0
5
10
15
20
25
VOUT (VP-P)
8
EL2126C - Preliminary
EL2126C - Preliminary
Ultra-low Noise, Low Power, Wideband Amplifier
Typical Performance Curves
Total Harmonic Distortion vs Frequency -20 -30 -40 THD (dBc) -50 -60 -70 -80 -90 1k 10k 100k 1M 10M 100M 1 10 IN, VS=15V 100 1k Frequency (Hz) Group Delay vs Frequency 16
VS=
VS=
Noise vs Frequency 10
VS=5V VO=2VP-P IN (pA/Hz), VN (nV/Hz)
IN, VS=5V VN, VS=15V VN, VS=5V
10k
100k
Frequency (Hz) Settling Time vs Accuracy 70 60 Settling Time (ns) 50 40 30 20 10 0 0.1 1.0 Accuracy (%) CMRR vs Frequency -10 -30 -50 -70 -90 -110 10 110 PSRR vs Frequency 10.0
5V, V
O=5V P-P
12 Group Delay (ns) 8 4 0 -4 1M
VS=5V RL=500 AV=10
15V,
VO=5
VP-P
VS=
5V ,
VS=
VO=
15V,
2VP -P
AV=-10
VO=2
VP-P
10M Frequency (Hz)
100M
400M
VS=5V 90 70 50 30 10 10k PSRR+ PSRR-
CMRR (dB)
100
1k
10k
100k
1M
10M
100M
PSRR (dB)
100k
1M Frequency (Hz)
10M
200M
Frequency (Hz)
9
EL2126C - Preliminary
EL2126C - Preliminary
Ultra-low Noise, Low Power, Wideband Amplifier
Typical Performance Curves
Closed Loop Output Impedance vs Frequency 100 Closed Loop Output Impedance () VS=5V 120 100 Bandwidth (MHz) 10 80 60 40 20 0 -40 Bandwidth and Peaking vs Temperature VS=5V 3.5 3 2.5 Peaking (dB) 2 1.5 1 0.5 0 0 40 80 120 160 -0.5
1
0.1
0.01 10k
100k
1M Frequency (Hz)
10M
100M
Temperature
10
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.
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.
Printed in U.S.A.
October 3, 2001
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
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