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EL2228C - Preliminary
EL2228C - Preliminary
Dual Low Noise Amplifier
Features
* 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
General Description
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. 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. 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 -40C to +85C temperature range.
Applications
* * * * * * ADSL Filters HDSLII Filters Ultrasound input amplifiers Wideband Instrumentation Communications equipment Wideband sensors
Ordering Information
Part No. EL2228CY EL2228CY-T13 EL2228CY-T7 EL2228CS EL2228CS-T13 EL2228CS-T7 Temp. Range 8-Pin MSOP 8-Pin MSOP 8-Pin MSOP 8-Pin SO 8-Pin SO 8-Pin SO Package 13" 7" 13" 7" Outline # MDP0043 MDP0043 MDP0043 MDP0027 MDP0027 MDP0027
Connection Diagram
VOUTA 1 VINA- 2 VINA+ 3 VS- 4 + +
8 VS+ 7 VOUTB 6 VINB5 VINB+
EL2228C 8-Pin SO and 8-Pin MSOP
September 25, 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.
EL2228C - Preliminary
EL2228C - Preliminary
Dual Low Noise Amplifier
Absolute Maximum Ratings (T
A
= 25C)
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
+125C -65C to +150C -40C to +85C 260C 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 = 500 and CL = 3pF to 0V, RF = 420 & TA = 25C unless otherwise specified. Parameter Input Characteristics VOS TCVOS IB RIN CIN CMIR CMRR AVOL en in VOL VOH ISC PSRR IS SR tS BW HD2 HD3 Input Offset Voltage Average Offset Voltage Drift Input Bias Current Input Impedance Input Capacitance Common-Mode Input Range Common-Mode Rejection Ratio Open-Loop Gain Voltage Noise Current Noise Output Swing Low Output Swing High Short Circuit Current Power Supply Rejection Ratio Supply Current (Per Amplifier) Slew Rate [2] Settling to +0.1% (AV = +1) -3dB Bandwidth 2nd Harmonic Distortion 3rd Harmonic Distortion f = 1MHz, VO = 2VP-P, RL = 500, AV = 2 f = 1MHz, VO = 2VP-P, RL = 150, AV = 2 f = 1MHz, VO = 2VP-P, RL = 500, AV = 2 f = 1MHz, VO = 2VP-P, RL = 150, AV = 2 1. Measured over operating temperature range 2. Slew rate is measured on rising and falling edges for VIN from -11.8V to +10.4V for VIN from -10V to +10V -5V VOUT 5V f = 100kHz f = 100kHz RL = 500 RL = 250 RL = 500 RL = 250 RL = 10 VS is moved from 10.8V to 13.2V No load 2.5V square wave, measured 25%-75% (AV = +1), VO = 2V step Power Supply Performance 65 4 44 83 5 65 50 80 -86 -79 -93 -70 6 dB mA V/s ns MHz dBc dBc dBc dBc 10 9.5 140 -11.8 60 60 60 90 75 75 4.9 1.2 -10.3 -9.5 10.3 10 180 -10 -9 VCM = 0V
[1]
Description
Condition
Min
Typ 0.2 -4
Max 3 -1
Unit mV V/C A M pF
VCM = 0V
-9
-4.5 8 1
+10.4
V dB dB dB nV/Hz pA/Hz V V V V mA
Output Characteristics
Dynamic Performance
2
EL2228C - Preliminary
EL2228C - Preliminary
Dual Low Noise Amplifier
Electrical Characteristics
VS+= +5V, VS - = -5V, RL = 500 and CL = 3pF to 0V, RF = 420 & TA = 25C unless otherwise specified. Parameter Input Characteristics VOS TCVOS IB RIN CIN CMIR CMRR AVOL en in VOL VOH ISC PSRR IS SR tS BW HD2 HD3 Input Offset Voltage Average Offset Voltage Drift Input Bias Current Input Impedance Input Capacitance Common-Mode Input Range Common-Mode Rejection Ratio Open-Loop Gain Voltage Noise Current Noise Output Swing Low Output Swing High Short Circuit Current Power Supply Rejection Ratio Supply Current (Per Amplifier) Slew Rate [2] Settling to +0.1% (AV = +1) -3dB Bandwidth 2nd Harmonic Distortion 3rd Harmonic Distortion f = 1MHz, VO = 2VP-P, RL = 500, AV = 2 f = 1MHz, VO = 2VP-P, RL = 150, AV = 2 f = 1MHz, VO = 2VP-P, RL = 500, AV = 2 f = 1MHz, VO = 2VP-P, RL = 150, AV = 2 1. Measured over operating temperature range 2. Slew rate is measured on rising and falling edges for VIN from -4.7V to +3.4V for VIN from -2V to +2V -2.5V VOUT 2.5V f = 100kHz f = 100kHz RL = 500 RL = 250 RL = 500 RL = 250 RL = 10 VS is moved from 4.5V to 5.5V No load 2.5V square wave, measured 25%-75% (AV = +1), VO = 2V step Power Supply Performance 65 3.5 35 83 4.5 50 50 75 -90 -71 -99 -69 5.5 dB mA V/s ns MHz dBc dBc dBc dBc 3.5 3.5 60 60 72 4.7 1.2 -3.8 -3.7 3.7 3.6 100 -3.5 -3.5 -4.7 60 90 VCM = 0V
[1]
Description
Condition
Min
Typ 0.6 4.9
Max 3 -1
Unit mV V/C A M pF
VCM = 0V
-9
-4.5 6 1.2
+3.4
V dB dB dB nV/Hz pA/Hz V V V V mA
Output Characteristics
Dynamic Performance
3
EL2228C - Preliminary
EL2228C - Preliminary
Dual Low Noise Amplifier
Typical Performance Curves
Non-inverting Frequency Response for Various RF 4 3 2 Normalized Gain (dB) 1 0 -1 -2 -3 -4 -5 VS=12V AV=+1 RL=500 1M 10M Frequency (Hz) Non-inverting Frequency Response (Gain) 4 3 2 Normalized Gain (dB) 1 0 -1 -2 -3 -4 -5 -6 100k 1M 10M Frequency (Hz) Non-inverting Frequency Response (Phase) 135 90 45 0 Phase () -45 -90 -135 -180 -225 -270 VS=12V RF=420 RL=500 1M 10M Frequency (Hz) 100M AV=5 AV=10 AV=1 AV=2 Phase () 135 90 45 0 -45 -90 -135 -180 -225 -270 VS=12V RF=420 RL=500 1M 10M Frequency (Hz) 100M AV=-5 AV=-10 AV=-1 AV=-2 100M AV=5 AV=10 VS=12V RF=420 RL=500 AV=+1 4 3 2 Normalized Gain (dB) AV=1 AV=2 1 0 -1 -2 -3 -4 -5 -6 100k 1M 10M Frequency (Hz) Inverting Frequency Response (Phase) 100M AV=-5 AV=-10 AV=-1 AV=-2 100M RF=200 RF=0 RF=1k RF=420 Normalized Gain (dB) 4 3 2 1 0 -1 -2 -3 -4 -5 -6 1M VS=12V AV=-1 RL=500 10M Frequency (Hz) Inverting Frequency Response (Gain) VS=12V RF=420 100M RF=1k RF=100 RF=420 Inverting Frequency Response for Various RF
-6 100k
-315 100k
-315 100k
4
EL2228C - Preliminary
EL2228C - Preliminary
Dual Low Noise Amplifier
Typical Performance Curves
Non-inverting Frequency Response for Various Input Signal Levels VS=12V RF=420 RL=500 AV=+1 VIN=100mV PP VIN=1VPP VIN=2VPP VIN=500mVPP 1M 10M Frequency (Hz) Non-inverting Frequency Response for Various CL 4 3 2 Normalized Gain (dB) 1 0 -1 -2 -3 -4 -5 VS=12V RF=420 RL=500 AV=+1 1M CL=10pF CL=3pF CL=30pF Normalized Gain (dB) 4 3 2 1 0 -1 -2 -3 -4 -5 10M Frequency (Hz) -3dB Bandwidth vs Supply Voltage for Noninverting Gains G=1 -3dB Bandwidth (MHz) 60 VS=12V RF=420 RL=500 AV=+1 100M VS=12V RF=420 RL=500 AV=+1 1M VO=+5 VO=-5 10M Frequency (Hz) -3dB Bandwidth vs Supply Voltage for Inverting Gains G=-1 20 -3dB Bandwidth (MHz) 15 10 5 0 2.5 VS=12V RF=420 RL=500 AV=+1 100M VO=-10 VO=+10 VO=0 100M Non-inverting Frequency Response for Various RL 4 3 2 Normalized Gain (dB) 1 0 -1 -2 -3 -4 -5 VS=12V AV=+1 RF=420 1M RL=50 RL=150 RL=500 RL=1k
4 3 2 Normalized Gain (dB) 1 0 -1 -2 -3 -4 -5
-6 100k
-6 100k
10M Frequency (Hz)
100M
Non-inverting Frequency Response for Various Output DC Levels
-6 100k
-6 100k
80
25
G=-2
40 G=2 20 G=5 G=10
G=-5 G=-10
0 2.5
4.5
6.5
8.5
10.5
12.5
4.5
6.5
8.5
10.5
12.5
Supply Voltage (V)
Supply Voltage (V)
5
EL2228C - Preliminary
EL2228C - Preliminary
Dual Low Noise Amplifier
Typical Performance Curves
Peaking vs Supply Voltage for Non-inverting Gains VS=12V RF=420 RL=500 AV=+1 Peaking (dB) Peaking vs Supply Voltage for Inverting Gains 0.2 0.16 0.12 0.08 0.04 0 2.5 G=-2 G=-10 4.5 6.5 8.5 10.5 12.5 4.5 6.5 8.5 10.5 12.5 G=-1 VS=12V RF=420 RL=500 AV=+1
1 0.8
G=1 Peaking (dB) 0.6 0.4 0.2 0 2.5 G=10
G=2
Supply Voltage (V) Small Signal Step Response VS=12V RF=420 AV=1 RL=500
Supply Voltage (V) Small Signal Step Response VS=2.5V RF=420 AV=1 RL=500
20mV/div
20mV/div
50ns/div
50ns/div
Large Signal Step Response VS=12V RF=420 AV=1 RL=500
Large Signal Step Response VS=2.5V RF=420 AV=1 RL=500
0.5V/div
0.5V/div
50ns/div
50ns/div
6
EL2228C - Preliminary
EL2228C - Preliminary
Dual Low Noise Amplifier
Typical Performance Curves
Group Delay vs Frequency 20 16 12 Group Delay (ns) 8 4 0 -4 -8 -12 -16 -20 1M VS=12V RF=420 AV=1 RL=500 10M Frequency (Hz) Supply Current vs Supply Voltage 13.2 12 10.8 8.4 7.2 6 4.8 3.6 2.4 1.2 0 0 1.4 2.8 4.2 5.6 7 VS (V) CMRR 100 80 60 40 20 0 10 VS=12 100 1k 10k 100k 1M 10M 100M 10 -10 -30 VS-50 -70 -90 VS+ PSRR 8.4 9.8 11.2 12.6 14 0.01 10k 100k 1M Frequency (Hz) 10M 100M Output Impedance () Supply Current (mA) 9.6 10 100 100M 200M AV=1 AV=2 dG (%) or dP () 0.2 0.15 0.1 0.05 0 -0.05 -0.1 -0.15 -1 -0.5 0 DC Input Voltage (V) Closed Loop Output Impedance vs Frequency 0.5 1 Differential Gain/Phase vs DC Input Voltage at 3.58MHz VS=12V RF=420 RL=150 AV=2 dP
dG
1
0.1
-CMRR (dB)
1k
10k
100k
1M
10M
100M
Frequency (Hz)
Frequency (Hz)
7
EL2228C - Preliminary
EL2228C - Preliminary
Dual Low Noise Amplifier
Typical Performance Curves
1MHz 2nd and 3rd Harmonic Distortion vs Output Swing (VS=12V) 1MHz 2nd and 3rd Harmonic Distortion vs Output Swing (VS=2.5V)
-40 -50 -60
-50 -60 -70 -80 -90 -100 -110
2ndH 3rdH Distortion (dB)
Distortion (dB)
-70 -80 -90 -100
3rdH
2ndH
0
4
8
12
16
20
0
0.5
1
1.5
2
2.5
Output Swing (VPP) 1MHz 2nd and 3rd Harmonic Distortion vs Output Swing (single-ended)
Output Swing (VPP) 1MHz 2nd and 3rd Harmonic Distortion vs Output Swing (single-ended) VS=2.5V AV=2 RF=420 2nd DUT
-50 -60 -70 Distortion (dBc) -80 -90 -100 -110 -120
-50 -60
3rd HD 2nd HD Distortion (dBc)
-70 -80 -90 -100 -110
3rd DUT
VS=12V AV=2 RF=420 0 4 8 12 16 20
0
0.5
1
1.5
2
2.5
Output Swing (VPP) Voltage and Current Noise vs Frequency 18 Voltage Noise (nVHz), Current Noise 16 14 12 10 8 6 4 2 0 10 100 IN EN Gain (dB) -20 -40 0
Output Swing (VPP) Channel to Channel Isolation vs Frequency
AB
BC -60 -80 -100 100k
1k Frequency (Hz)
10k
100k
1M
10M Frequency (Hz)
100M
8
EL2228C - Preliminary
EL2228C - Preliminary
Dual Low Noise Amplifier
Typical Performance Curves
IS vs Tempertaure VS=12V 3dB Bandwidth vs Temperature VS=5V
11
100 90 Bandwidth (MHz)
10 IS
80 70 60
9
0 -50
0
50 Temperature (mA)
100
150
50 -40
10
60
110
160
Junction Temperature (C) VOS vs Temperature 2
IB vs Temperature -2
1 -4 VOS (mV) -6 -1 -8 -50 0 50 Temperature (C) SR vs Temperature 76 74 Power Dissipation (W) 72 SR (V/s) 70 68 66 64 62 -50 0 50 Temperature (C) 100 150 0.7 100 150 IB (A) 0
-2 0.1
0.1
1 Temperature (C)
1
10
Package Power Dissipation vs Ambient Temp. JEDEC JESD51-3 Low Effective Thermal Conductivity Test Board
0.6 625mW 0.5 0.4 0.3 0.2 0.1 0 0 25 50 75 85 100 125 150 486mW MSOP8 206C/W SO8 160C/W
Ambient Temperature (C)
9
EL2228C - Preliminary
EL2228C - Preliminary
Dual Low Noise Amplifier
Pin Descriptions
EL2228CY 8-Pin MSOP EL2228CS 8Pin SO Pin Name Pin Function Equivalent Circuit
10
EL2228C - Preliminary
EL2228C - Preliminary
Dual Low Noise Amplifier
Applications Information
Product Description
11
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.
WARNING - Life Support Policy
September 25, 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
12
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.

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