View EL5191ACSZ_830633.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

(R)
IGNS DES NEW OR ED F L5167 END /E OMM EL5166 EC SEE OT R N
EL5191, EL5191A
August 3, 2005 FN7180.2
Data Sheet
1GHz Current Feedback Amplifier with Enable
The EL5191 and EL5191A amplifiers are of the current feedback variety and exhibit a very high bandwidth of 1GHz. This makes these amplifiers ideal for today's high speed video and monitor applications, as well as a number of RF and IF frequency designs. With a supply current of just 9mA and the ability to run from a single supply voltage from 5V to 10V, these amplifiers offer very high performance for little power consumption. The EL5191A also incorporates an enable and disable function to reduce the supply current to 100A typical per amplifier. Allowing the CE pin to float or applying a low logic level will enable the amplifier. The EL5191 is offered in the 5-pin SOT-23 package and the EL5191A is available in the 6-pin SOT-23 as well as the industry-standard 8-pin SO packages. Both operate over the industrial temperature range of -40C to +85C.
Features
* 1GHz -3dB bandwidth * 9mA supply current * Single and dual supply operation, from 5V to 10V supply span * Fast enable/disable (EL5191A only) * Available in SOT-23 packages * High speed, 600MHz product available (EL5192, EL5292, and EL5392) * Lower power, 300MHz product available (EL5193, EL5293, EL5393) * Pb-Free plus anneal available (RoHS compliant)
Applications
* Video amplifiers * Cable drivers * RGB amplifiers
Ordering Information
PART NUMBER EL5191CS EL5191CSZ (See Note) EL5191CSZ-T7 (See Note) EL5191CSZ-T13 (See Note) EL5191CW-T7 EL5191CWZ-T7 (See Note) EL5191ACW-T7 EL5191ACW-T7A EL5191ACWZ-T7 (See Note) EL5191ACWZ-T7A (See Note) EL5191ACS EL5191ACS-T7 EL5191ACS-T13 EL5191ACSZ (See Note) EL5191ACSZ-T7 (See Note) EL5191ACSZ-T13 (See Note) PACKAGE 8-Pin SO 8-Pin SO (Pb-free) 8-Pin SO (Pb-free) 8-Pin SO (Pb-free) 5-Pin SOT-23 5-Pin SOT-23 (Pb-free) 6-Pin SOT-23 6-Pin SOT-23 6-Pin SOT-23 (Pb-free) 6-Pin SOT-23 (Pb-free) 8-Pin SO 8-Pin SO 8-Pin SO 8-Pin SO (Pb-free) 8-Pin SO (Pb-free) 8-Pin SO (Pb-free) TAPE & REEL 7" 13" 7" 7" 7" (3K pcs) 7" (250 pcs) 7" (3K pcs) 7" (250 pcs) 7" 13" 7" 13" PKG. DWG. # MDP0027 MDP0027 MDP0027 MDP0027 MDP0038 MDP0038
* Test equipment * Instrumentation * Current to voltage converters
Pinouts
EL5191A (8-PIN SO) TOP VIEW
NC 1 8 CE 7 VS+ 6 OUT 5 NC
MDP0038 MDP0038 MDP0038 MDP0038 MDP0027 MDP0027 MDP0027 MDP0027 MDP0027 MDP0027
IN- 2 IN+ 3 VS- 4 +
EL5191A (6-PIN SOT-23) TOP VIEW
OUT 1 VS- 2 IN+ 3 6 VS+ 5 CE +4 IN-
EL5191 (5-PIN SOT-23) TOP VIEW
OUT 1 VS- 2 +IN+ 3 4 IN5 VS+
NOTE: Intersil Pb-free plus anneal products employ special Pb-free material sets; molding compounds/die attach materials and 100% matte tin plate termination finish, which are RoHS compliant and compatible with both SnPb and Pb-free soldering operations. Intersil Pb-free products are MSL classified at Pb-free peak reflow temperatures that meet or exceed the Pb-free requirements of IPC/JEDEC J STD-020.
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. 1-888-INTERSIL or 1-888-468-3774 | Intersil (and design) is a registered trademark of Intersil Americas Inc. Copyright Intersil Americas Inc. 2004, 2005. All Rights Reserved All other trademarks mentioned are the property of their respective owners.
EL5191, EL5191A
Absolute Maximum Ratings (TA = 25C)
Supply Voltage between VS+ and VS-. . . . . . . . . . . . . . . . . . . . .11V Maximum Continuous Output Current . . . . . . . . . . . . . . . . . . . 50mA Operating Junction Temperature . . . . . . . . . . . . . . . . . . . . . . . 125C Power Dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . See Curves Pin Voltages. . . . . . . . . . . . . . . . . . . . . . . . . VS- -0.5V to VS+ +0.5V Storage Temperature. . . . . . . . . . . . . . . . . . . . . . . .-65C to +150C Ambient Operating Temperature . . . . . . . . . . . . . . . .-40C to +85C
CAUTION: Stresses above those listed in "Absolute Maximum Ratings" may cause permanent damage to the device. This is a stress only rating and operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied. IMPORTANT NOTE: All parameters having Min/Max specifications are guaranteed. Typical 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 Specifications
PARAMETER AC PERFORMANCE BW
VS+ = +5V, VS- = -5V, RF = 392 for AV = 1, RF = 250 for AV = 2, RL = 150, TA = 25C unless otherwise specified. DESCRIPTION CONDITIONS MIN TYP MAX UNIT
-3dB Bandwidth
AV = +1 AV = +2
1000 600 30
MHz MHz MHz V/s ns nV/Hz pA/Hz pA/Hz %
BW1 SR tS eN iNiN+ dG dP DC PERFORMANCE VOS TCVOS ROL
0.1dB Bandwidth Slew Rate 0.1% Settling Time Input Voltage Noise IN- Input Current Noise IN+ Input Current Noise Differential Gain Error (Note 1) Differential Phase Error (Note 1) AV = +2 AV = +2 VO = -2.5V to +2.5V, AV = +2 VOUT = -2.5V to +2.5V, AV = -1 2400
2800 7 3.8 25 55 0.035 0.04
Offset Voltage Input Offset Voltage Temperature Coefficient Transimpedance Measured from TMIN to TMAX
-15
1 5
15
mV V/C k
150
300
INPUT CHARACTERISTICS CMIR CMRR -ICMR +IIN -IIN RIN CIN Common Mode Input Range Common Mode Rejection Ratio - Input Current Common Mode Rejection + Input Current - Input Current Input Resistance Input Capacitance 3 42 -6 -120 -60 40 5 27 0.5 3.3 50 6 120 60 V dB A/V A A k pF
OUTPUT CHARACTERISTICS VO Output Voltage Swing RL = 150 to GND RL = 1k to GND IOUT SUPPLY ISON ISOFF Supply Current - Enabled Supply Current - Disabled No load, VIN = 0V No load, VIN = 0V 8 9 100 11 150 mA A Output Current RL = 10 to GND 3.4 3.8 95 3.7 4.0 120 V V mA
2
EL5191, EL5191A
Electrical Specifications
PARAMETER PSRR -IPSR VS+ = +5V, VS- = -5V, RF = 392 for AV = 1, RF = 250 for AV = 2, RL = 150, TA = 25C unless otherwise specified. (Continued) DESCRIPTION Power Supply Rejection Ratio - Input Current Power Supply Rejection CONDITIONS DC, VS = 4.75V to 5.25V DC, VS = 4.75V to 5.25V MIN 55 -2 TYP 75 2 MAX UNIT dB A/V
ENABLE (EL5191A ONLY) tEN tDIS IIHCE IILCE VIHCE VILCE NOTE: 1. Standard NTSC test, AC signal amplitude = 286mVP-P, f = 3.58MHz Enable Time Disable Time CE Pin Input High Current CE Pin Input Low Current CE Input High Voltage for Power-down CE Input Low Voltage for Power-down CE = VS+ CE = VSVS+ - 1 VS+ - 3 40 600 0.8 0 6 -0.1 ns ns A A V V
3
EL5191, EL5191A Typical Performance Curves
Non-Inverting Frequency Response (Gain) SOT-23 Package 6 AV = 1 Normalized Magnitude (dB) 2 AV = 2 0 90
Non-Inverting Frequency Response (Phase)
AV = 1 AV = 2
Phase ()
-2 AV = 5 -6 AV = 10 -10 RF = 390 RL = 150 10M 100M Frequency (Hz) Inverting Frequency Response (Gain) SOT-23 Package 6 1G
-90
AV = 5 AV = 10 AV RF = 390 RL = 150 10M 100M Frequency (Hz) Inverting Frequency Response (Phase) 1G
-180
-270
-14 1M
-360 1M
90 AV=-1
Normalized Magnitude (dB)
2
0
AV = -1
AV=-2 AV=-5
Phase ()
-2
-90
AV = -2 AV = -5
-6
-180
-10
RF = 250 RL = 150 10M 100M Frequency (Hz) 1G
-270 RF = 250 RL = 150 10M 100M Frequency (Hz) 1G
-14 1M
-360 1M
Frequency Response for Various CIN10 Normalized Magnitude (dB) Normalized Magnitude (dB) 2pF added 6 1pF added 2 6
Frequency Response for Various RL
RL = 100 2 RL = 150 RL = 500
-2
-2
0pF added
-6
-6
-10 1M
AV = 2 RF = 250 RL = 150 10M 100M 1G
-10 AV = 2 RF = 250 10M 100M Frequency (Hz) 1G
-14 1M
Frequency (Hz)
4
EL5191, EL5191A Typical Performance Curves
(Continued)
Frequency Response for Various CL 14 Normalized Magnitude (dB) Normalized Magnitude (dB) 6
Frequency Response for Various RF
150 10 6pF added 6 4pF added 2 2 250
-2
375 500 AV = 2 RG = RF RL = 150 10M 100M Frequency (Hz) Frequency Response for Various Common-Mode Input Voltages 1G
-6
-2
-6 1M
AV = 2 RF = 250 RL=150 10M
0pF added
-10
100M Frequency (Hz)
1G
-14 1M
Group Delay vs Frequency 3.5 Normalized Magnitude (dB) 3 Group Delay (ns) 2.5 2 1.5 1 0.5 0 1M AV = 2 RF = 250 AV = 1 RF = 390 6
VCM = 3V 2
VCM = 0V
-2 VCM = -3V -6
-10
10M
100M Frequency (Hz)
1G
-14 1M
AV = 2 RF = 250 RL = 150 10M 100M Frequency (Hz) 1G
Transimpedance (ROL) vs Frequency 10M 0 1M Magnitude () Phase -90 Phase () 100k -180 10k Gain 1k -360 100 1k 10k 100k 1M 10M Frequency (Hz) 100M 1G -270 PSRR/CMRR (dB) 0 20
PSRR and CMRR vs Frequency
PSRR+
-20 PSRR-40
-60
CMRR
-80 10k
100k
1M 10M Frequency (Hz)
100M
1G
5
EL5191, EL5191A Typical Performance Curves
(Continued)
-3dB Bandwidth vs Supply Voltage for NonInverting Gains 1200 1000 -3dB Bandwidth (MHz) 800 600 400 200 0 5 6 7 8 9 10 Total Supply Voltage (V) Peaking vs Supply Voltage for Non-Inverting Gains 4 3.5 3 Peaking (dB) 2.5 2 1.5 1 0.5 0 5 6 7 8 9 10 Total Supply Voltage (V) Non-Inverting Frequency Response (Gain) SO8 Package 6 Normalized Magnitude (dB) AV = 1 AV = 2 AV = 2 AV = 10 0 AV = 1 Peaking (dB) RF = 390 RL=150 3 4 AV = 2 AV = 5 AV = 10 RF = 390 RL = 150 AV = 1 -3dB Bandwidth (MHz) 600 500
-3dB Bandwidth vs Supply Voltage for Inverting Gains
AV = -2 AV = -1
400 300 200 100 0 5
AV = -5
RF = 250 RL = 150 6 7 8 9 10
Total Supply Voltage (V) Peaking vs Supply Voltage for Inverting Gains
AV = -1
2
AV = -2
1 RF = 250 RL = 150 5 6 7 AV = -5
8
9
10
Total Supply Voltage (V) Non-Inverting Frequency Response (Phase) SO8 Package 90 AV = 1 0 AV = 2
2
Phase ()
-2
-90 AV = 5 -180 AV = 10 -270 RF = 392 RF = 392 150 RL = 10M 100M Frequency (Hz) 1G
-6
AV = 5 AV = 10 RF = 392 RL = 150 10M 100M Frequency (Hz) 1G 1.6G
-10
-14 1M
-360 1M
6
EL5191, EL5191A Typical Performance Curves
(Continued)
Inverting Frequency Response (Gain) SO8 Package 6 AV = -1 Normalized Magnitude (dB) 2 AV = -2 0 90
Inverting Frequency Response (Phase) SO8 Package AV = -1 AV = -2
AV = -5 -6
Phase ()
-2
-90 AV = -5 -180
-10 RF = 250 RL = 150 10M 100M 1G
-270 RF = 250 RL = 150 10M 100M 1G
-14 1M
-360 1M
Frequency (Hz) -3dB Bandwidth vs Temperature for Non-Inverting Gains 2000 RF = 250 RL = 150 -3dB Bandwidth (MHz) 1500 AV=1 1000 AV=2 500 AV=5 AV=10 -3dB Bandwidth (MHz) 700 600 500 400 300 200 100 0 -40 0 -40 RF=250 RL=150 10
Frequency (Hz) -3dB Bandwidth vs Temperature for Inverting Gains
AV = -1
AV = -2
AV = -5
10
60
110
160
60
110
160
Ambient Temperature (C) Peaking vs Temperature 3 RL = 150 2.5 2 1.5 1 0.5 0 -40 AV = -1 AV = -2 1 100 AV = 1 Voltage Noise (nV/Hz) Current Noise (pA/Hz) 100 i N1k
Ambient Temperature (C) Voltage and Current Noise vs Frequency
Peaking (dB)
iN+
10
eN
10
60
110
160
1k
Ambient Temperature (C)
10k 100k Frequency (Hz)
1M
10M
7
EL5191, EL5191A Typical Performance Curves
(Continued)
Closed Loop Output Impedance vs Frequency 100 10
Supply Current vs Supply Voltage
Output Impedance ()
10 Supply Current (mA)
8
1
6
0.1
4
0.01
2
0.001 100
0 1k 10k 100k 10M 1M Frequency (Hz) 100M 1G 0 2 4 6 8 Supply Voltage (V) 10 12
2nd and 3rd Harmonic Distortion vs Frequency -10 Input Power Intercept (dBm) -20 Harmonic Distortion (dBc) -30 -40 -50 -60 -70 -80 -90 -100 1 10 Frequency (MHz) 100 200 3rd Order Distortion 2nd Order Distortion AV = +2 VOUT = 2VP-P RL = 100 30 25 20 15 10 5 0 -5 -10
Two-Tone 3rd Order Input Referred Intermodulation Intercept (IIP3)
-15 10
AV = +2 RL = 100 100 Frequency (MHz) 200
Differential Gain/Phase vs DC Input Voltage at 3.58MHz 0.03 AV = 2 RF = RG = 250 RL = 150 dP 0.03 0.02 dG (%) or dP () 0.01 0 -0.01 -0.02 -0.03 -0.05 -1
Differential Gain/Phase vs DC Input Voltage at 3.58MHz AV = 1 RF = 375 RL = 500
0.01 dG (%) or dP ()
dP
-0.01
dG
dG
-0.03
-0.5
0 DC Input Voltage
0.5
1
-0.04 -1
-0.5
0 DC Input Voltage
0.5
1
8
EL5191, EL5191A Typical Performance Curves
(Continued)
Output Voltage Swing vs Frequency THD < 1% 10 Output Voltage Swing (VPP) Output Voltage Swing (VPP) RL = 500 8 RL = 150 6 10
Output Voltage Swing vs Frequency THD < 0.1% RL = 500 8 RL = 150 6
4
4
2 AV = 2 1 10 Frequency (MHz) 100 200
2 AV = 2 1 10 Frequency (MHz) 100
0
0
Small Signal Step Response VS = 5V RL = 150 AV = 2 RF = RG = 250
Large Signal Step Response
VS = 5V RL = 150 AV = 2 RF = RG = 250
200mV/div
1V/div
10ns/div
10ns/div Transimpedance (ROI) Vs Temperature 375
Settling Time vs Settling Accuracy 25 AV = 2 RF = RG = 250 RL= 150 VSTEP = 5VP-P output RoI (k)
350 325 300 275 250
20 Settling Time (ns)
15
10
5
225 200 -40
0 0.01
0.1 Settling Accuracy (%)
1
10
60 Die Temperature (C)
110
160
9
EL5191, EL5191A Typical Performance Curves
(Continued)
PSRR and CMRR vs Temperature 90 PSRR ICMR/IPSR (A/V) 70 PSRR/CMRR (dB) 2.5 2 1.5 1 0.5 0 -0.5 10 -40
ICMR and IPSR vs Temperature
ICMR+
IPSR
50 CMRR 30
ICMR-
10
60 Die Temperature (C)
110
160
-1 -40
10
60 Die Temperature (C)
110
160
Offset Voltage vs Temperature 2 140 120 Input Current (A) 100 80 60 40 20
Input Current vs Temperature
1 VOS (mV)
IB+
0
IB0 -1 -40 10 60 Die Temperature (C) Positive Input Resistance vs Temperature 35 30 25 RIN (k) 20 15 10 5 0 -40 8 -40 Supply Current (mA) 10 110 160 -20 -40 10 60 Temperature (C) Supply Current vs Temperature 110 160
9
10
60 Temperature (C)
110
160
10
60 Temperature (C)
110
160
10
EL5191, EL5191A Typical Performance Curves
(Continued)
Positive Output Swing vs Temperature for Various Loads 4.2 4.1 1k 4 VOUT (V) 3.9 3.8 3.7 3.6 3.5 -40 150 VOUT (V) -3.7 -3.8 -3.9 -4 -4.1 -3.5 -3.6
Negative Output Swing vs Temperature for Various Loads 150
1k
10
60 Temperature (C)
110
160
-4.2 -40
10
60 Temperature (C)
110
160
Output Current vs Temperature 140 Sink 4500 Slew Rate (V/S) 5000
Slew Rate vs Temperature AV = 2 RF = RG = 250 RL = 150
135
IOUT (mA)
130
4000
125 Source 120
3500
115 -40
10
60 Die Temperature (C)
110
160
3000 -40
10
60 Die Temperature (C)
110
160
Enable Response
Disable Response
500mV/div
500mV/div
5V/div 5V/div
20ns/div
400ns/div
Typical Performance Curves
(Continued)
11
EL5191, EL5191A
1.4 POWER DISSIPATION (W) 1.2
JEDEC JESD51-7 HIGH EFFECTIVE THERMAL CONDUCTIVITY TEST BOARD POWER DISSIPATION (W)
0.5 0.45
JEDEC JESD51-7 HIGH EFFECTIVE THERMAL CONDUCTIVITY TEST BOARD
1 909mW 0.8 0.6 0.4 0.2 0 0 25 50 75 85 100 125 150 SO8 JA=110C/W
0.4 435mW 0.35 0.3 0.25 0.2 0.15 0.1 0.05 0 0 25 50 75 85 100 125 150 SOT23-5/6 JA=230C/W
AMBIENT TEMPERATURE (C)
AMBIENT TEMPERATURE (C)
1 POWER DISSIPATION (W) 0.9 0.8
JEDEC JESD51-3 LOW EFFECTIVE THERMAL CONDUCTIVITY TEST BOARD POWER DISSIPATION (W)
0.45 0.4 0.35 0.3 0.25 0.2 0.15 0.1 0.05 0
JEDEC JESD51-3 LOW EFFECTIVE THERMAL CONDUCTIVITY TEST BOARD 391mW
SO =2
0.7 625mW 0.6 0.5 0.4 0.3 0.2 0.1 0 0 25 50
SO8 JA=160C/W
JA
T2 3 56 -5-6 C /W
75 85 100
125
150
0
25
50
75 85 100
125
150
AMBIENT TEMPERATURE (C)
AMBIENT TEMPERATURE (C)
12
EL5191, EL5191A Pin Descriptions
8-PIN SO 1, 5 2 4 4 5-PIN SOT-23 6-PIN SOT-23 PIN NAME NC INFUNCTION Not connected Inverting input
VS+
EQUIVALENT CIRCUIT
IN+
IN-
VS-
Circuit 1 3 4 6 3 2 1 3 2 1 IN+ VSOUT Non-inverting input Negative supply Output
VS+
(See circuit 1)
OUT
VS-
Circuit 2 7 8 5 6 5 VS+ CE Positive supply Chip enable
VS+
CE
VS-
Circuit 3
13
EL5191, EL5191A Applications Information
Product Description
The EL5191 is a current-feedback operational amplifier that offers a wide -3dB bandwidth of 1GHz and a low supply current of 9mA per amplifier. The EL5191 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 current-feedback topology, the EL5191 does not have the normal gain-bandwidth product associated with voltage-feedback 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 EL5191 the ideal choice for many low-power/highbandwidth applications such as portable, handheld, or battery-powered equipment. For varying bandwidth needs, consider the EL5192 with 600MHz on a 6mA supply current or the EL5193 with 300MHz on a 4mA supply current. Versions include single, dual, and triple amp packages with 5-pin SOT-23, 16-pin QSOP, and 8-pin or 16-pin SO outlines. enabled when CE is 2V or less, and disabled when CE is above 4V. Although the logic levels are not standard TTL, this choice of logic voltages allows the EL5191A to be enabled by tying CE to ground, even in 5V single supply applications. The CE pin can be driven from CMOS outputs.
Capacitance at the Inverting Input
Any manufacturer's high-speed voltage- or current-feedback 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 open-loop 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 EL5191 has been optimized with a 250 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, particularly for the SO package, should be avoided if possible. Sockets add parasitic inductance and capacitance which will result in additional peaking and overshoot.
Feedback Resistor Values
The EL5191 has been designed and specified at a gain of +2 with RF approximately 250. This value of feedback resistor gives 600MHz of -3dB bandwidth at AV = 2 with about 2dB of peaking. With AV = -2, that same RF gives 450MHz of bandwidth with 0.6dB of peaking. Since the EL5191 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 EL5191 is a current-feedback amplifier, its gain-bandwidth product is not a constant for different closedloop gains. This feature actually allows the EL5191 to maintain about the same -3dB bandwidth. As gain is increased, bandwidth decreases slightly while 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 250 and still retain stability, resulting in only a slight loss of bandwidth with increased closed-loop gain.
Disable/Power-Down
The EL5191A amplifier can be disabled placing its output in a high impedance state. When disabled, the amplifier supply current is reduced to < 150A. The EL5191A is disabled when its CE pin is pulled up to within 1V of the positive supply. Similarly, the amplifier is enabled by floating or pulling its CE pin to at least 3V below the positive supply. For 5V supply, this means that an EL5191A amplifier will be
Supply Voltage Range and Single-Supply Operation
The EL5191 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 EL5191 will operate on dual supplies ranging from 2.5V to 5V. With single-supply, the EL5191 will operate from 5V to 10V.
14
EL5191, EL5191A
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 EL5191 has an input range which extends to within 2V of either supply. So, for example, on 5V supplies, the EL5191 has an input range which spans 3V. The output range of the EL5191 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.
Current Limiting
The EL5191 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 EL5191, 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 EL5191 to remain in the safe operating area. These parameters are calculated as follows:
T JMAX = T MAX + ( JA x n x PD MAX )
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 9mA supply current of each EL5191 amplifier. Special circuitry has been incorporated in the EL5191 to reduce the variation of output impedance with current output. This results in dG and dP specifications of 0.035% and 0.04, while driving 150 at a gain of 2. Video performance has also been measured with a 500 load at a gain of +1. Under these conditions, the EL5191 has dG and dP specifications of 0.02% and 0.02, respectively.
where: TMAX = Maximum ambient temperature JA = Thermal resistance of the package n = Number of amplifiers in the package PDMAX = Maximum power dissipation of each amplifier in the package PDMAX for each amplifier can be calculated as follows:
V OUTMAX PD MAX = ( 2 x V S x I SMAX ) + ( V S - V OUTMAX ) x --------------------------R
L
Output Drive Capability
In spite of its low 9mA of supply current, the EL5191 is capable of providing a minimum of 95mA of output current. With a minimum of 95mA of output drive, the EL5191 is capable of driving 50 loads to both rails, making it an excellent choice for driving isolation transformers in telecommunications applications.
where: VS = Supply voltage ISMAX = Maximum supply current of 1A VOUTMAX = Maximum output voltage (required) RL = Load resistance
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 EL5191 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.
15
EL5191, EL5191A Typical Application Circuits
0.1F +5V IN+ INVS0.1F -5V 250 5 VS+
OUT
0.1F +5V IN+ INVS0.1F -5V 250 VIN 250 VS+ 5
VOUT
OUT
INVERTING 200mA OUTPUT CURRENT DISTRIBUTION AMPLIFIER
250
250 0.1F +5V IN+ INVS0.1F VS+
OUT
250
-5V
0.1F 250 VIN +5V IN+ INVS0.1F -5V VS+
OUT
VOUT
FAST-SETTLING PRECISION AMPLIFIER
16
EL5191, EL5191A Typical Application Circuits
(Continued)
0.1F +5V IN+ VS+ OUT INVS0.1F -5V 250 120 VOUT+ 0.1F +5V IN+ VS+ OUT INVS0.1F -5V 250 VIN 250 250 -5V 250 240 +5V 120 VOUT1k 0.1F IN+ 1k 0.1F 250 -5V 250 INVS+5V IN+
0.1F
VS+ OUT
0.1F
0.1F
VS+ OUT VOUT
INVS0.1F
Transmitter
Receiver
DIFFERENTIAL LINE DRIVER/RECEIVER
All Intersil U.S. products are manufactured, assembled and tested utilizing ISO9000 quality systems. Intersil Corporation's quality certifications can be viewed at www.intersil.com/design/quality
Intersil products are sold by description only. Intersil Corporation reserves the right to make changes in circuit design, software and/or specifications at any time without notice. Accordingly, the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by Intersil is believed to be accurate and reliable. However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Intersil or its subsidiaries.
For information regarding Intersil Corporation and its products, see www.intersil.com 17

▲Up To Search▲

Price & Availability of EL5191ACSZ

	To Download EL5191ACSZ Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .