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EL5393C
EL5393C
Triple 300MHz Current Feedback Amplifier
Features
* 300MHz -3dB bandwidth * 4mA supply current (per amplifier) * Single and dual supply operation, from 5V to 10V * Available in 16-pin QSOP package * Single (EL5193C) and Dual (EL5293C) available * High speed, 1GHz product available (EL5191C) * High speed, 6mA, 600MHz product available (EL5192C, EL5292C, and EL5392C
General Description
The EL5393C is a triple current feedback amplifier with a bandwidth of 300MHz. This makes these amplifiers ideal for today's high speed video and monitor applications. With a supply current of just 4mA per amplifier and the ability to run from a single supply voltage from 5V to 10V, these amplifiers are also ideal for hand held, portable or battery powered equipment. For applications where board space is critical, the EL5393C is offered in 16-pin QSOP package, as well as an industry standard 16-pin SO. The EL5393C operates over the industrial temperature range of -40C to +85C.
Applications
* * * * * * * * Battery-powered Equipment Hand-held, Portable Devices Video Amplifiers Cable Drivers RGB Amplifiers Test Equipment Instrumentation Current to Voltage Converters
Pin Configurations
16-Pin SO & QSOP INA+ NC* VSNC* 1 2 3 4 5 6 7 8 + + + 16 INA15 OUTA 14 VS+ 13 OUTB 12 INB11 NC 10 OUTC 9 INC-
Ordering Information
Part No EL5393CS EL5393CS-T7 EL5393CS-T13 EL5393CU EL5393CU-T13 Package 16-Pin SO 16-Pin SO 16-Pin SO 16-Pin QSOP 16-Pin QSOP Tape & Reel 7" 13" 13" Outline # MDP0027 MDP0027 MDP0027 MDP0040 MDP0040
INB+ NC NC* INC+
EL5393CS, EL5393CU
April 26, 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.
EL5393C
EL5393C
Triple 300MHz Current Feedback 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. 11V Supply Voltage between VS+ and VSMaximum Continuous Output Current 50mA
Operating Junction Temperature Power Dissipation Pin Voltages Storage Temperature Operating Temperature
125C See Curves VS- - 0.5V to VS+ +0.5V -65C to +150C -40C to +85C
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, RF = 750 for AV = 1, RF = 375 for AV = 2, RL = 150, TA = 25C unless otherwise specified. Parameter AC Performance BW BW1 SR ts CS en inin+ dG dP VOS TCVOS ROL CMIR CMRR +IIN -IIN RIN CIN VO IOUT Supply IsON PSRR -IPSR Supply Current Power Supply Rejection Ratio - Input Current Power Supply Rejection No Load, VIN = 0V DC, VS = 4.75V to 5.25V DC, VS = 4.75V to 5.25V 3 55 -2 4 75 2 5 mA dB A/V -3dB Bandwidth 0.1dB Bandwidth Slew Rate 0.1% Settling Time Channel Separation Input Voltage Noise IN- input current noise IN+ input current noise Differential Gain Error Differential Phase Error Offset Voltage Input Offset Voltage Temperature Coefficient Transimpedance Common Mode Input Range Common Mode Rejection Ratio + Input Current - Input Current Input Resistance Input Capacitance Output Voltage Swing Output Current RL = 150 to GND RL = 1k to GND RL = 10 to GND 3.4 3.8 95 Measured from TMIN to TMAX 300 3 42 -60 -35
[1] [1]
Description AV = +1 AV = +2
Conditions
Min
Typ 300 200 20
Max
Unit MHz MHz MHz V/s ns dB nV/Hz pA/Hz pA/Hz %
VO=-2.5V to +2.5V, AV = +2 VOUT = -2.5V to +2.5V, AV = -1 f = 5MHz
2000
2200 12 60 4.4 17 50
AV = +2 AV = +2 -10
0.03 0.04 1 5 600 3.3 50 1 1 45 0.5 3.7 4.0 120 60 35 10
DC Performance mV V/C k V dB A A k pF V V mA
Input Characteristics
Output Characteristics
1. Standard NTSC test, AC signal amplitude = 286mVp-p, f = 3.58MHz
2
EL5393C
EL5393C
Triple 300MHz Current Feedback Amplifier
Typical Performance Curves
Non-Inverting Frequency Response (Gain) 6 AV=1 Normalized Magnitude (dB) 2 AV=2 Phase () -2 AV=5 -6 AV=10 -10 RF=750 RL=150 -14 1M 10M 100M Frequency (Hz) Inverting Frequency Response (Gain) 6 AV=-1 AV=-2 90 1G -270 -90 0 90
Non-Inverting Frequency Response (Phase)
AV=1 AV=2 AV=5 AV=10
-180
RF=750 RL=150 -360 1M 10M 100M Frequency (Hz) Inverting Frequency Response (Phase) 1G
AV=-1 0
Normalized Magnitude (dB)
2
Phase ()
-2 AV=-3 -6
-90
AV=-2 AV=-3
-180
-10 RF=500 RL=150 -14 1M 10M 100M Frequency (Hz) Frequency Response for Various CIN10 1G
-270 RF=500 RL=150 -360 1M 10M 100M Frequency (Hz) Frequency Response for Various RL 6 RL=100 RL=150 1G
Normalized Magnitude (dB)
1pF added 2
Normalized Magnitude (dB)
6
2pF added
2
-2
RL=500
-2 AV=2 RF=500 RL=150 10M
0pF added
-6
-6
-10
AV=2 RF=500 10M 100M Frequency (Hz) 1G
-10 1M
100M Frequency (Hz)
1G
-14 1M
3
EL5393C
EL5393C
Triple 300MHz Current Feedback Amplifier
Typical Performance Curves
Frequency Response for Various CL 14 AV=2 RL=150 RF=RG=500 33pF Normalized Magnitude (dB) 2 6
Frequency Response for Various RF
340
475 620
Normalized Magnitude (dB)
10
6
22pF 15pF
-2 750 -6 1.2k -10 AV=2 RG=RF RL=150 10M 100M Frequency (Hz) Frequency Response for Various Common-mode Input Voltages 6 VCM=3V VCM=0V 1G
2
-2
8pF 0pF
-6 1M
10M
100M Frequency (Hz)
1G
-14 1M
Group Delay vs Frequency 3.5 3 2.5 Delay (ns) 2 1.5 1 0.5 0 1M AV=1 RF=750 Normalized Magnitude (dB) AV=2 RF=500 2
-2
VCM=-3V
-6 AV=2 RF=500 RL=150 10M 100M Frequency (Hz) PSRR and CMRR vs Frequency 20 1G
-10
10M
100M Frequency (Hz)
1G
-14 1M
Transimpedance (ROL) vs Frequency 10M Phase 1M PSRR/CMRR (dB) -90 Magnitude () Phase () 100k -180 10k Gain 1k -360 100 1k 10k 100k 1M 10M Frequency (Hz) 100M 1G -270 0 0
PSRR+
-20 PSRR-40
-60
CMRR
-80 10k
100k
1M 10M Frequency (Hz)
100M
1G
4
EL5393C
EL5393C
Triple 300MHz Current Feedback Amplifier
Typical Performance Curves
-3dB Bandwidth vs Supply Voltage for Noninverting Gains 400 350 -3dB Bandwidth (MHz) 300 250 200 150 100 50 0 5 6 7 8 AV=5 AV=2 RF=750 RL=150 AV=1 200 -3dB Bandwidth (MHz) 250
-3dB Bandwidth vs Supply Voltage for Inverting Gains
AV=-1
150
AV=-2 AV=-5
100
50 AV=10 0 9 10 5 6 7 8 9 10 Total Supply Voltage (V) Peaking vs Supply Voltage for Non-inverting Gains Total Supply Voltage (V) Peaking vs Supply Voltage for Inverting Gains 2.5 AV=1 RF=750 RL=150 2 Peaking (dB) RF=500 RL=150 RF=500 RL=150
4 3.5 3 Peaking (dB) 2.5 2 1.5 1 0.5 AV=10 0 5 6 7 8 9 10 AV=2
1.5
AV=-1
1 AV=-2
0.5
0 5
6
7
8
9
10
Total Supply Voltage (V) -3dB Bandwidth vs Temperature for Non-inverting Gains 500 RF=750 RL=150 400 -3dB Bandwidth (MHz) AV=1 -3dB Bandwidth (MHz) 200 250 AV=-1 AV=-2 150
Total Supply Voltage (V) -3dB Bandwidth vs Temperature for Inverting Gains
300 AV=2
200
100
AV=-5
100
AV=5 AV=10 10 60 Ambient Temperature (C) 110 160
50 RF=500 RL=150 0 -40 10 60 Ambient Temperature (C) 110 160
0 -40
5
EL5393C
EL5393C
Triple 300MHz Current Feedback Amplifier
Typical Performance Curves
Peaking vs Temperature 2.5 RL=150 2 1.5 Peaking (dB) 1 0.5 AV=-1 0 -0.5 -40 Voltage Noise (nV/Hz) , Current Noise (pA/Hz) AV=1 100 1000
Voltage and Current Noise vs Frequency
in+ in-
10
en
10
60 Ambient Temperature (C)
110
160
1 100
1000
10k 100k Frequency ()
1M
10M
Closed Loop Output Impedance vs Frequency 100 10
Supply Current vs Supply Voltage
10 Output Impedance () Supply Current (mA)
8
1
6
0.1
4
0.01
2
0.001 100 1k 10k 100k 1M Frequency (Hz) 10M 100M 1G
0 0 2 4 6 8 Supply Voltage (V) 10 12
2nd and 3rd Harmonic Distortion vs Frequency -20 -30 Harmonic Distortion (dBc) -40 -50 -60 -70 -80 -90 1 10 Frequency (MHz) 100 3rd Order Distortion 2nd Order Distortion AV=+2 VOUT=2VP-P RL=100 25 20 Input Power Intercept (dBm) 15 10 5 0 -5
Two-tone 3rd Order Input Referred Intermodulation Intercept (IIP3) AV=+2 RL=150
AV=+2 RL=100 100 Frequency (MHz)
-10 10
6
EL5393C
EL5393C
Triple 300MHz Current Feedback Amplifier
Typical Performance Curves
Differential Gain/Phase vs DC Input Voltage at 3.58MHz 0.03 0.02 0.01 dG (%) or dP () 0 -0.01 -0.02 -0.03 -0.04 -0.05 -1 -0.5 0 DC Input Voltage Output Voltage Swing vs Frequency THD<1% 10 RL=500 Output Voltage Swing (VPP) Output Voltage Swing (VPP) 8 RL=150 6 8 10 0.5 1 AV=2 RF=RG=500 RL=150 dP 0.04 0.03 0.02 dG (%) or dP () dG 0.01 0 -0.01 -0.02 -0.03 -0.04
Differential Gain/Phase vs DC Input Voltage at 3.58MHz AV=1 RF=750 RL=500
dP
dG
-1
-0.5
0 DC Input Voltage
0.5
1
Output Voltage Swing vs Frequency THD<0.1%
RL=500
6 RL=150 4
4
2 AV=2 0 1 10 Frequency (MHz) 100
2 AV=2 0 1 10 Frequency (MHz) 100
Small Signal Step Response VS=5V RL=150 AV=2 RF=RG=500
Large Signal Step Response VS=5V RL=150 AV=2 RF=RG=500
200mV/div
1V/div
10ns/div
10ns/div
7
EL5393C
EL5393C
Triple 300MHz Current Feedback Amplifier
Typical Performance Curves
Settling Time vs Settling Accuracy 25 AV=2 RF=RG=500 RL=150 VSTEP=5VP-P output RoI (k) 625
Transimpedance (RoI) vs Temperature
20 Settling Time (ns)
600
15
575
10
5
550
0 0.01
0.1 Settling Accuracy (%)
1
525 -40
10
60 Die Temperature (C)
110
160
PSRR and CMRR vs Temperature 90 80 70 60 50 40 30 20 10 -40 10 60 Die Temperature (C) Offset Voltage vs Temperature 2 60 40 1 Input Current ( A) 20 VOS (mV) 110 160 CMRR ICMR/IPSR ( A/V) PSRR/CMRR (dB) PSRR 2
ICMR and IPSR vs Temperature
1.5
ICMR+
1 IPSR 0.5 ICMR-
0
-0.5 -40
10
60 Die Temperature (C)
110
160
Input Current vs Temperature
IB0 -20 -40 IB+
0
-1
-2 -40
10
60 Die Temperature (C)
110
160
-60 -40
10
60 Temperature (C)
110
160
8
EL5393C
EL5393C
Triple 300MHz Current Feedback Amplifier
Typical Performance Curves
Positive Input Resistance vs Temperature 60 50 40 RIN+ (k) 30 20 10 0 -40 Supply Current (mA) 5
Supply Current vs Temperature
4
3
2
1
10
60 Temperature (C)
110
160
0 -40
10
60 Temperature (C)
110
160
Positive Output Swing vs Temperature for Various Loads 4.2 4.1 1k 4 VOUT (V) VOUT (V) 3.9 3.8 3.7 3.6 3.5 -40 150 -3.7 -3.8 -3.9 -4 -3.5 -3.6
Negative Output Swing vs Temperature for Various Loads 150
1k -4.1 -4.2 -40
10
60 Temperature (C)
110
160
10
60 Temperature (C)
110
160
Output Current vs Temperature 130 4000
Slew Rate vs Temperature
Sink Slew Rate (V/ S) 125 IOUT (mA) 3500
Source 120
3000 AV=2 RF=RG=500 RL=150
115 -40
10
60 Die Temperature (C)
110
160
2500 -40
10
60 Die Temperature (C)
110
160
9
EL5393C
EL5393C
Triple 300MHz Current Feedback Amplifier
Typical Performance Curves
Channel-to-Channel Isolation vs Frequency 0 1 0.9 -20 Power Dissipation (W) 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 -100 100k 0 1M 10M Frequency (Hz) 100M 400M
Package Power Dissipation vs Ambient Temp. JEDEC JESD51-3 Low Effective Thermal Conductivity Test Board
909mW
Gain (dB)
-40
SO 16 (0. 11 15 0 0" C/ ) W
QS OP 1 8 C 6 /W
633mW
15
-60
-80
0
25
50
75
100
125
150
Ambient Temperature (C)
10
EL5393C
EL5393C
Triple 300MHz Current Feedback Amplifier
Pin Descriptions
EL5393C SO-16 1 EL5393C QSOP-16 1 Pin Name INA+ Function Non-inverting input, channel A Equivalent Circuit
VS+
IN+
IN-
VSCircuit 1
2, 4, 7 3 5 6, 11 8 9 10
2, 4, 7 3 5 6, 11 8 9 10
NC VS INB+ NC INC+ INCOUTC
Not connected (leave disconnected) Negative supply Non-inverting input, channel B Not connected Non-inverting input, channel C Inverting input, channel C Output, channel C (See circuit 1) (See circuit 1)
VS+
(See circuit 1)
OUT
VSCircuit 2
12 13 14 15 16
12 13 14 15 16
INBOUTB VS + OUTA INA-
Inverting input, channel B Output, channel B Positive supply Output, channel A Inverting input, channel A
(See circuit 1) (See circuit 2) (See circuit 2) (See circuit 1)
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EL5393C
EL5393C
Triple 300MHz Current Feedback Amplifier
Applications Information
Product Description
The EL5393C is a current-feedback operational amplifier that offers a wide -3dB bandwidth of 300MHz and a low supply current of 4mA per amplifier. The EL5393C works with supply voltages ranging from a single 5V to 10V and they are also capable of swinging to within 1V of either supply on the output. Because of their currentfeedback topology, the EL5393C does not have the normal gain-bandwidth product associated with voltagefeedback operational amplifiers. Instead, its -3dB bandwidth to remain relatively constant as closed-loop gain is increased. This combination of high bandwidth and low power, together with aggressive pricing make the EL5393C the ideal choice for many low-power/highbandwidth applications such as portable, handheld, or battery-powered equipment. For varying bandwidth needs, consider the EL5191C with 1GHz on a 9mA supply current or the EL5192C with 600MHz on a 6mA supply current. Versions include single, dual, and triple amp packages with 5-pin SOT23, 16-pin QSOP, and 8-pin or 16-pin SO outlines. particularly for the SO package, should be avoided if possible. Sockets add parasitic inductance and capacitance which will result in additional peaking and overshoot.
Capacitance at the Inverting Input
Any manufacturer's high-speed voltage- or currentfeedback amplifier can be affected by stray capacitance at the inverting input. For inverting gains, this parasitic capacitance has little effect because the inverting input is a virtual ground, but for non-inverting gains, this capacitance (in conjunction with the feedback and gain resistors) creates a pole in the feedback path of the amplifier. This pole, if low enough in frequency, has the same destabilizing effect as a zero in the forward openloop response. The use of large-value feedback and gain resistors exacerbates the problem by further lowering the pole frequency (increasing the possibility of oscillation.) The EL5393C has been optimized with a 475 feedback resistor. With the high bandwidth of these amplifiers, these resistor values might cause stability problems when combined with parasitic capacitance, thus ground plane is not recommended around the inverting input pin of the amplifier.
Power Supply Bypassing and Printed Circuit Board Layout
As with any high frequency device, good printed circuit board layout is necessary for optimum performance. Low impedance ground plane construction is essential. Surface mount components are recommended, but if leaded components are used, lead lengths should be as short as possible. The power supply pins must be well bypassed to reduce the risk of oscillation. The combination of a 4.7F tantalum capacitor in parallel with a 0.01F capacitor has been shown to work well when placed at each supply pin. For good AC performance, parasitic capacitance should be kept to a minimum, especially at the inverting input. (See the Capacitance at the Inverting Input section) Even when ground plane construction is used, it should be removed from the area near the inverting input to minimize any stray capacitance at that node. Carbon or Metal-Film resistors are acceptable with the Metal-Film resistors giving slightly less peaking and bandwidth because of additional series inductance. Use of sockets,
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Feedback Resistor Values
The EL5393C has been designed and specified at a gain of +2 with RF approximately 500. This value of feedback resistor gives 200MHz of -3dB bandwidth at AV=2 with 2dB of peaking. With AV=-2, an RF of approximately 500 gives 175MHz of bandwidth with 0.2dB of peaking. Since the EL5393C is a current-feedback amplifier, it is also possible to change the value of RF to get more bandwidth. As seen in the curve of Frequency Response for Various RF and RG, bandwidth and peaking can be easily modified by varying the value of the feedback resistor. Because the EL5393C is a current-feedback amplifier, its gain-bandwidth product is not a constant for different closed-loop gains. This feature actually allows the EL5393C to maintain about the same -3dB bandwidth. As gain is increased, bandwidth decreases slightly while
EL5393C
EL5393C
Triple 300MHz Current Feedback Amplifier
stability increases. Since the loop stability is improving with higher closed-loop gains, it becomes possible to reduce the value of RF below the specified 475 and still retain stability, resulting in only a slight loss of bandwidth with increased closed-loop gain. Video performance has also been measured with a 500 load at a gain of +1. Under these conditions, the EL5393C has dG and dP specifications of 0.03% and 0.04.
Output Drive Capability
In spite of its low 4mA of supply current, the EL5393C is capable of providing a minimum of 95mA of output current. With a minimum of 95mA of output drive, the EL5393C is capable of driving 50 loads to both rails, making it an excellent choice for driving isolation transformers in telecommunications applications.
Supply Voltage Range and Single-Supply Operation
The EL5393C has been designed to operate with supply voltages having a span of greater than 5V and less than 10V. In practical terms, this means that the EL5393C will operate on dual supplies ranging from 2.5V to 5V. With single-supply, the EL5393C will operate from 5V to 10V. As supply voltages continue to decrease, it becomes necessary to provide input and output voltage ranges that can get as close as possible to the supply voltages. The EL5393C has an input range which extends to within 2V of either supply. So, for example, on +5V supplies, the EL5393C has an input range which spans 3V. The output range of the EL5393C is also quite large, extending to within 1V of the supply rail. On a 5V supply, the output is therefore capable of swinging from -----4V to +4V. Single-supply output range is larger because of the increased negative swing due to the external pull-down resistor to ground.
Driving Cables and Capacitive Loads
When used as a cable driver, double termination is always recommended for reflection-free performance. For those applications, the back-termination series resistor will decouple the EL5393C from the cable and allow extensive capacitive drive. However, other applications may have high capacitive loads without a back-termination resistor. In these applications, a small series resistor (usually between 5 and 50) can be placed in series with the output to eliminate most peaking. The gain resistor (RG) can then be chosen to make up for any gain loss which may be created by this additional resistor at the output. In many cases it is also possible to simply increase the value of the feedback resistor (RF) to reduce the peaking.
Video Performance
For good video performance, an amplifier is required to maintain the same output impedance and the same frequency response as DC levels are changed at the output. This is especially difficult when driving a standard video load of 150, because of the change in output current with DC level. Previously, good differential gain could only be achieved by running high idle currents through the output transistors (to reduce variations in output impedance.) These currents were typically comparable to the entire 4mA supply current of each EL5393C amplifier. Special circuitry has been incorporated in the EL5393C to reduce the variation of output impedance with current output. This results in dG and dP specifications of 0.03% and 0.04, while driving 150 at a gain of 2.
Current Limiting
The EL5393C has no internal current-limiting circuitry. If the output is shorted, it is possible to exceed the Absolute Maximum Rating for output current or power dissipation, potentially resulting in the destruction of the device.
Power Dissipation
With the high output drive capability of the EL5393C, it is possible to exceed the 125C Absolute Maximum junction temperature under certain very high load current conditions. Generally speaking when RL falls below about 25, it is important to calculate the maximum junction temperature (TJMAX ) for the application to determine if power supply voltages, load conditions, or package type need to be modified for the EL5393C to
13
EL5393C
EL5393C
Triple 300MHz Current Feedback Amplifier
remain in the safe operating area. These parameters are calculated as follows:
T JMA X = T MA X + ( JA x n x PD MA X )
where: 70$; -$ Q 0D[LPXP $PELHQW 7HPSHUDWXUH 7KHUPDO 5HVLVWDQFH RI WKH 3DFNDJH 1XPEHU RI $PSOLILHUV LQ WKH 3DFNDJH
3'0$; 0D[LPXP 3RZHU 'LVVLSDWLRQ RI (DFK $PSOLILHU LQ WKH 3DFNDJH PDMAX for each amplifier can be calculated as follows:
V OU T MAX PD MA X = ( 2 x V S x I SMA X ) + ( V S - V OU T MAX ) x --------------------------R
L
where: 96 6XSSO\ 9ROWDJH 0D[LPXP 6XSSO\ &XUUHQW RI $ 0D[LPXP 2XWSXW 9ROWDJH 5HTXLUHG ,60$; 5/
92870$;
/RDG 5HVLVWDQFH
14
EL5393C
EL5393C
Triple 300MHz Current Feedback 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.
April 26, 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
15
Printed in U.S.A.

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