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PDF EL2227 Data sheet ( Hoja de datos )
| Número de pieza | EL2227 | |
| Descripción | Dual Very Low Noise Amplifier | |
| Fabricantes | Intersil Corporation | |
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Hay una vista previa y un enlace de descarga de EL2227 (archivo pdf) en la parte inferior de esta página. Total 11 Páginas | ||
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®
Data Sheet
June 23, 2004
EL2227
FN7058.1
Dual Very Low Noise Amplifier
The EL2227 is a dual, low-noise
amplifier, ideally suited to line
receiving applications in ADSL and
HDSLII designs. With low noise specification of just
1.9nV/√Hz and 1.2pA/√Hz, the EL2227 is perfect for the
detection of very low amplitude signals.
The EL2227 features a -3dB bandwidth of 115MHz and is
gain-of-2 stable. The EL2227 also affords minimal power
dissipation with a supply current of just 4.8mA per amplifier.
The amplifier can be powered from supplies ranging from
±2.5V to ±12V.
The EL2227 is available in a space-saving 8-pin MSOP
package as well as the industry-standard 8-pin SO. It can
operate over the -40°C to +85°C temperature range.
Ordering Information
PART NUMBER
PKG.
PACKAGE TAPE & REEL DWG.#
EL2227CY
8-Pin MSOP
- MDP0043
EL2227CY-T13
8-Pin MSOP
13” MDP0043
EL2227CY-T7
8-Pin MSOP
7” MDP0043
EL2227CS
8-Pin SO
- MDP0027
EL2227CS-T13
8-Pin SO
13” MDP0027
EL2227CS-T7
8-Pin SO
7” MDP0027
EL2227CSZ
(See Note)
8-Pin SO
(Pb-free)
- MDP0027
EL2227CSZ-T13
(See Note)
8-Pin SO
(Pb-free)
13” MDP0027
EL2227CSZ-T7
(See Note)
8-Pin SO
(Pb-free)
7” MDP0027
NOTE: Intersil Pb-free products employ special Pb-free material
sets; molding compounds/die attach materials and 100% matte tin
plate termination finish, which is 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-020B.
Features
• Voltage noise of only 1.9nV/√Hz
• Current noise of only 1.2pA/√Hz
• Bandwidth (-3dB) of 115MHz @AV = +2
• Gain-of-2 stable
• Just 4.8mA per amplifier
• 8-pin MSOP package
• ±2.5V to ±12V operation
• Pb-free available
Applications
• ADSL receivers
• HDSLII receivers
• Ultrasound input amplifiers
• Wideband instrumentation
• Communications equipment
• AGC & PLL active filters
• Wideband sensors
Pinout
EL2227
(8-PIN SO, MSOP)
TOP VIEW
VOUTA 1
VINA- 2
VINA+ 3
-
+
VS- 4
8 VS+
7 VOUTB
- 6 VINB-
+
5 VINB+
1 CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 321-724-7143 | Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright © 2001 Elantec Semiconductor Inc. 2003-2004 Intersil Americas Inc. . All Rights Reserved. Elantec is a registered trademark of Elantec Semiconductor, Inc.
All other trademarks mentioned are the property of their respective owners.
1 page  
EL2227
Typical Performance Curves (Continued)
Non-inverting Frequency Response for Various CL
5
4
3
2
1
0
-1
-2 VVSS==±±1122V
-3 VRF=620Ω
-4
RRFL==652000Ω
ΩAV=+2
-5
1M
CL=30pF
CL=12pF
CL=2pF
10M
100M 200M
Frequency (Hz)
Non-inverting Frequency Response for Various RL
4
3
2
RL=100Ω
RL=500Ω
1
0
-1 RL=50Ω
-2
-3 VS=±12V
-4 RF=620Ω
-5
CL=15pF
AV=+2
-6
1M
10M
100M 200M
Frequency (Hz)
3dB Bandwidth vs Supply Voltage
140
AV=+2
120 RF=620Ω
RL=500Ω
100
80
60
AV=-1
AV=+2
AV=-2
40 AV=+5
20
0
24
AV=-5
AV=+10
68
Supply Voltage (±V)
AV=-10
10 12
Inverting Frequency Response for Various CL
4
3
2
1
0
-1
-2
-3 VS=±12V
-4 RF=420Ω
-5
RL=500Ω
AV=-1
-6
1M
CL=30pF
CL=12pF
CL=2pF
10M
100M 200M
Frequency (Hz)
Frequency Response for Various Output DC Levels
4
3
2
1
0
-1
-2
-3 VS=±12V
-4 RF=620Ω
-5
RL=500Ω
AV=+2
-6
100k
VO=+10V
VO=-10V
VO=0V
VO=-5V
1M 10M
Frequency (Hz)
VO=+5V
100M
Peaking vs Supply Voltage
4
3.5 AV=+2
3
2.5 AV=-1
2
1.5 AV=+1
AV=-10
1 AV=+5 AV=-5
0.5
0
2468
Supply Voltage (±V)
AV=+2
RF=620Ω
RL=500Ω
AV=-2
10 12
Large Signal Step Response
VS=±12V
RF=620Ω
AV=2
RL=500Ω
Large Signal Step Response
VS=±2.5V
RF=620Ω
AV=2
RL=500Ω
0.5V/div
0.5V/div
100ns/div
5
100ns/div
5 Page 
EL2227
back-terminated video cable, then the maximum average
value (over duty-cycle) of VOUTMAX is 1.4V, and RL = 150Ω,
giving the results seen in Table 1.
TABLE 1.
PART
EL2227CS
PACKAGE
SO8
ΘJA
MAX PDISS @
TMAX
MAX VS
160°C/W 0.406W @ 85°C
EL2227CY MSOP8 206°C/W 0.315W @ 85°C
Single-Supply Operation
The EL2227 have been designed to have a wide input and
output voltage range. This design also makes the EL2227 an
excellent choice for single-supply operation. Using a single
positive supply, the lower input voltage range is within
200mV of ground (RL = 500Ω), and the lower output voltage
range is within 875mV of ground. Upper input voltage range
reaches 3.6V, and output voltage range reaches 3.8V with a
5V supply and RL = 500Ω. This results in a 2.625V output
swing on a single 5V supply. This wide output voltage range
also allows single-supply operation with a supply voltage as
high as 28V.
Gain-Bandwidth Product and the -3dB Bandwidth
The EL2227 have a gain-bandwidth product of 137MHz
while using only 5mA of supply current per amplifier. For
gains greater than 2, their closed-loop -3dB bandwidth is
approximately equal to the gain-bandwidth product divided
by the noise gain of the circuit. For gains less than 2, higher-
order poles in the amplifiers' transfer function contribute to
even higher closed loop bandwidths. For example, the
EL2227 have a -3dB bandwidth of 115MHz at a gain of +2,
dropping to 28MHz at a gain of +5. It is important to note that
the EL2227 have been designed so that this “extra”
bandwidth in low-gain applications does not come at the
expense of stability. As seen in the typical performance
curves, the EL2227 in a gain of +2 only exhibit 0.5dB of
peaking with a 1000Ω load.
Output Drive Capability
The EL2227 have been designed to drive low impedance
loads. They can easily drive 6VPP into a 500Ω load. This
high output drive capability makes the EL2227 an ideal
choice for RF, IF and video applications.
Printed-Circuit Layout
The EL2227 are well behaved, and easy to apply in most
applications. However, a few simple techniques will help
assure rapid, high quality results. As with any high-frequency
device, good PCB layout is necessary for optimum
performance. Ground-plane construction is highly
recommended, as is good power supply bypassing. A 0.1µF
ceramic capacitor is recommended for bypassing both
supplies. Lead lengths should be as short as possible, and
bypass capacitors should be as close to the device pins as
possible. For good AC performance, parasitic capacitances
should be kept to a minimum at both inputs and at the
output. Resistor values should be kept under 5kΩ because
of the RC time constants associated with the parasitic
capacitance. Metal-film and carbon resistors are both
acceptable, use of wire-wound resistors is not recommended
because of their parasitic inductance. Similarly, capacitors
should be low-inductance for best performance.
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
11
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| Páginas | Total 11 Páginas | |
| PDF Descargar | [ Datasheet EL2227.PDF ] | |
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