|
|
PDF ADA4311-1 Data sheet ( Hoja de datos )
| Número de pieza | ADA4311-1 | |
| Descripción | High Current Output Line Driver | |
| Fabricantes | Analog Devices | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de ADA4311-1 (archivo pdf) en la parte inferior de esta página. Total 16 Páginas | ||
|
No Preview Available !
www.DataSheet4U.com
Low Cost, Dual, High Current Output
Line Driver with Shutdown
ADA4311-1
FEATURES
High speed
−3 dB bandwidth: 310 MHz, G = +5, RLOAD = 50 Ω
Slew rate: 1050 V/μs, RLOAD = 50 Ω
Wide output swing
20.6 V p-p differential, RLOAD of 100 Ω from 12 V supply
High output current
Low distortion
−98 dBc typical at 1 MHz, VOUT = 2 V p-p, G = +5, RLOAD = 100 Ω
−72 dBc typical at 10 MHz, VOUT = 2 V p-p, G = +5, RLOAD = 100 Ω
Power management and shutdown
Control inputs CMOS level compatible
Shutdown quiescent current: 1 mA/amplifier
Selectable quiescent current: 1 mA to 11.8 mA/amplifier
PIN CONFIGURATION
ADA4311-1
+VS 1
NC 2
OUT A 3
–IN A 4
+IN A 5
10 OUT B
9 –IN B
8 +IN B
7 PD1
6 PD0
NC = NO CONNECT
Figure 1. Thermally Enhanced, 10-Lead MINI_SO_EP
TYPICAL APPLICATION
VMID*
1/2
ADA4311-1
APPLICATIONS
Home networking line drivers
Twisted pair line drivers
Power line communications (PLC)
Video line drivers
ARB line drivers
I/Q channel amplifiers
1/2
*VMID
=
VCC
– GND
2
ADA4311-1
Figure 2. Typical PLC Driver Application
GENERAL DESCRIPTION
The ADA4311-1 is comprised of two high speed, current
feedback operational amplifiers. The high output current, high
bandwidth, and fast slew rate make it an excellent choice for
broadband applications requiring high linearity performance
while driving low impedance loads.
The ADA4311-1 incorporates a power management function
that provides shutdown capabilities and the ability to optimize
the quiescent current of the amplifiers. The CMOS-compatible,
power-down control pins (PD1 and PD0) enable the ADA4311-1
to operate in four different modes: full power, medium power,
low power, and complete power-down. In power-down mode, the
quiescent current drops to only 1.0 mA/amplifier, while the outputs
go to a high impedance state.
The ADA4311-1 is available in a thermally enhanced, 10-lead
MSOP with an exposed paddle for improved thermal conduction.
The ADA4311-1 is rated to work in the extended industrial
temperature range of −40°C to +85°C.
Rev. 0
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
www.analog.com
Fax: 781.461.3113
©2007 Analog Devices, Inc. All rights reserved.
1 page  
www.DataSheet4U.com
ABSOLUTE MAXIMUM RATINGS
Table 2.
Parameter
Supply Voltage
Power Dissipation
Storage Temperature Range
Operating Temperature Range
Lead Temperature (Soldering 10 sec)
Junction Temperature
Rating
13.6 V
(TJMAX − TA)/θJA
−65°C to +125°C
−40°C to +85°C
300°C
150°C
Stresses above those listed under Absolute Maximum Ratings
may cause permanent damage to the device. This is a stress rating
only; functional operation of the device at these or any other
conditions above those indicated in the operational section of
this specification is not implied. Exposure to absolute maximum
rating conditions for extended periods may affect device reliability.
THERMAL RESISTANCE
Thermal resistance (θJA) is specified for the worst-case conditions,
that is, θJA is specified for device soldered in circuit board for
surface-mount packages.
Table 3.
Package Type
10-Lead MINI_SO_EP
θJA Unit
44 °C/W
ADA4311-1
Maximum Power Dissipation
The maximum safe power dissipation for the ADA4311-1 is
limited by the associated rise in junction temperature (TJ) on
the die. At approximately 150°C, which is the glass transition
temperature, the plastic changes its properties. Even temporarily
exceeding this temperature limit can change the stresses that the
package exerts on the die, permanently shifting the parametric
performance of the amplifiers. Exceeding a junction temperature of
150°C for an extended period can result in changes in silicon
devices, potentially causing degradation or loss of functionality.
Figure 3 shows the maximum safe power dissipation in
the package vs. the ambient temperature for the 10-lead
MINI_SO_EP (44°C/W) on a JEDEC standard 4-layer board.
θJA values are approximations.
5.0
4.5
4.0
3.5
MINI_SO_EP-10
3.0
2.5
2.0
1.5
1.0
0.5
0
–35
–15
5
25 45 65 85
AMBIENT TEMPERATURE (°C)
Figure 3. Maximum Power Dissipation vs. Temperature for a 4-Layer Board
ESD CAUTION
Rev. 0 | Page 5 of 16
5 Page 
www.DataSheet4U.com
APPLICATION INFORMATION
FEEDBACK RESISTOR SELECTION
The feedback resistor has a direct impact on the closed-loop
bandwidth and stability of the current feedback op amp.
Reducing the resistance below the recommended value can
make the amplifier response peak and even become unstable.
Increasing the size of the feedback resistor beyond the recom-
mended value reduces the closed-loop bandwidth. Table 5
provides a convenient reference for quickly determining the
feedback and gain resistor values, and the corresponding
bandwidth, for common gain configurations. The recommended
feedback resistor value for the ADA4311-1 is 499 Ω.
Table 5. Recommended Values and Frequency Performance1
Gain
RF (Ω)
RG (Ω)
−3 dB SS BW (MHz)
+5 499 124 310
+5 1 k
250 220
+10 499 55.4 175
+20 499 26.1 84
1 Conditions: VS = ±12 V, TA = 25°C, RL = 50 Ω, PD1, PD0 = 0, 0.
POWER CONTROL MODES OF OPERATION
The ADA4311-1 features four power modes: full power, ¾
power, ½ power, and shutdown. The power modes are controlled
by two logic pins, PD0 and PD1. The power-down control pins
are compatible with standard 3 V and 5 V CMOS logic. Table 6
shows the various power modes and associated logic states. In
the power-down mode, the output of the amplifier goes into a
high impedance state.
ADA4311-1
Table 6. Power Modes
PD1
Low
Low
High
High
PD0
Low
High
Low
High
Power Mode
Full Power
¾ Power
½ Power
Power-Down
Total Supply
Current (mA)
23.6
15.8
10.4
1.8
Output
Impedance
Low
Low
Low
High
EXPOSED THERMAL PAD CONNECTIONS
The exposed thermal pad on the 10-lead MSOP is both the
reference for the PD pins and the only electrical connection for
the negative supply voltage. Therefore, in the 10-lead MSOP,
the ADA4311-1 can only be used on a single supply. The exposed
thermal pad must be connected to ground. Failure to do so
renders the part inoperable.
A requirement for this package is that the thermal pad be
connected to a solid plane with low thermal resistance, ensuring
adequate heat transfer away from the die and into the board.
POWERLINE APPLICATION
Applications (that is, powerline AV modems) requiring greater
than 10 dBm peak power should consider using an external
line driver, such as the ADA4311-1. Figure 22 shows an example
interface between the TxDAC® output and the ADA4311-1 biased
for single-supply operation. The peak-to-peak differential
output voltage swing of the TxDAC should be limited to
2 V p-p, with the gain of the ADA4311-1 configured to realize
the additional voltage gain required by the application. A low-
pass filter should be considered to filter the DAC images
inherent in the signal reconstruction process. In addition, dc
blocking capacitors are required to level-shift the output signal
of the TxDAC to the common-mode level of the ADA4311-1
(that is, VMID = VCC − GND/2).
0.1µF
RSET
TxDAC
IOUTP+
IOUTP–
OPTIONAL
LCLPF
VMID
1/2
ADA4311-1
0dB TO –7.5dB
1/2
ADA4311-1
Figure 22. TxDAC Output Directly via Center-Tap Transformer
Rev. 0 | Page 11 of 16
11 Page | ||
| Páginas | Total 16 Páginas | |
| PDF Descargar | [ Datasheet ADA4311-1.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| ADA4311-1 | High Current Output Line Driver | Analog Devices |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |