|
|
PDF AD8350 Data sheet ( Hoja de datos )
| Número de pieza | AD8350 | |
| Descripción | Low Distortion 1.0 GHz Differential Amplifier | |
| Fabricantes | Analog Devices | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de AD8350 (archivo pdf) en la parte inferior de esta página. Total 15 Páginas | ||
|
No Preview Available !
a
Low Distortion
1.0 GHz Differential Amplifier
FEATURES
High Dynamic Range
Output IP3: +28 dBm: Re 50 ⍀ @ 250 MHz
Low Noise Figure: 5.9 dB @ 250 MHz
Two Gain Versions:
AD8350-15: 15 dB
AD8350-20: 20 dB
–3 dB Bandwidth: 1.0 GHz
Single Supply Operation: 5 V to 10 V
Supply Current: 28 mA
Input/Output Impedance: 200 ⍀
Single-Ended or Differential Input Drive
8-Lead SOIC Package and 8-Lead microSOIC Package
APPLICATIONS
Cellular Base Stations
Communications Receivers
RF/IF Gain Block
Differential A-to-D Driver
SAW Filter Interface
Single-Ended-to-Differential Conversion
High Performance Video
High Speed Data Transmission
AD8350
FUNCTIONAL BLOCK DIAGRAM
8-Lead SOIC and SOIC Packages (with Enable)
IN+ 1
ENBL 2
VCC 3
OUT+ 4
+–
AD8350
8 IN–
7 GND
6 GND
5 OUT–
PRODUCT DESCRIPTION
The AD8350 series are high performance fully-differential
amplifiers useful in RF and IF circuits up to 1000 MHz. The
amplifier has excellent noise figure of 5.9 dB at 250 MHz. It
offers a high output third order intercept (OIP3) of +28 dBm
at 250 MHz. Gain versions of 15 dB and 20 dB are offered.
The AD8350 is designed to meet the demanding performance
requirements of communications transceiver applications. It
enables a high dynamic range differential signal chain, with
exceptional linearity and increased common-mode rejection.
The device can be used as a general purpose gain block, an
A-to-D driver, and high speed data interface driver, among
other functions. The AD8350 input can also be used as a single-
ended-to-differential converter.
The amplifier can be operated down to 5 V with an OIP3 of
+28 dBm at 250 MHz and slightly reduced distortion perfor-
mance. The wide bandwidth, high dynamic range and temperature
stability make this product ideal for the various RF and IF
frequencies required in cellular, CATV, broadband, instrumen-
tation and other applications.
The AD8350 is offered in an 8-lead single SOIC package and
μSOIC package. It operates from 5 V and 10 V power supplies,
drawing 28 mA typical. The AD8350 offers a power enable func-
tion for power-sensitive applications. The AD8350 is fabricated
using Analog Devices’ proprietary high speed complementary
bipolar process. The device is available in the industrial (–40°C to
+85°C) temperature range.
Rev. C
Document Feedback
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibilityisassumedbyAnalogDevicesforitsuse,norforanyinfringementsofpatentsorother
rights of thirdpartiesthatmay result fromits use. Specificationssubject tochangewithout 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 ©2001–2016 Analog Devices, Inc. All rights reserved.
Technical Support
www.analog.com
1 page  
AD8350
ABSOLUTE MAXIMUM RATINGS*
Supply Voltage, VS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 V
Input Power Differential . . . . . . . . . . . . . . . . . . . . . . +8 dBm
Internal Power Dissipation . . . . . . . . . . . . . . . . . . . . 400 mW
θJA SOIC (R) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100°C/W
θJA μSOIC (RM) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 133°C/W
Maximum Junction Temperature . . . . . . . . . . . . . . . . . 125°C
Operating Temperature Range . . . . . . . . . . . –40°C to +85°C
Storage Temperature Range . . . . . . . . . . . . –65°C to +150°C
Lead Temperature Range (Soldering 60 sec) . . . . . . . . . 300°C
*Stresses above those listed under Absolute Maximum Ratings may cause perma-
nent 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.
PIN CONFIGURATION
PIN FUNCTION DESCRIPTIONS
Pin Function
Description
1, 8 IN+, IN–
Differential Inputs. IN+ and IN–
should be ac-coupled (pins have a dc
bias of midsupply). Differential input
impedance is 200 Ω.
2 ENBL
Power-up Pin. A high level (5 V) enables
the device; a low level (0 V) puts device
in sleep mode.
3 VCC
Positive Supply Voltage. 5 V to 10 V.
4, 5 OUT+, OUT– Differential Outputs. OUT+ and
OUT– should be ac-coupled (pins have
a dc bias of midsupply). Differential
input impedance is 200 Ω.
6, 7 GND
Common External Ground Reference.
IN+ 1
8 IN–
ENBL 2 AD8350 7 GND
TOP VIEW
VCC 3 (Not to Scale) 6 GND
OUT+ 4
5 OUT–
CAUTION
ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily
accumulate on the human body and test equipment and can discharge without detection. Although
the AD8350 features proprietary ESD protection circuitry, permanent damage may occur on
devices subjected to high-energy electrostatic discharges. Therefore, proper ESD precautions are
recommended to avoid performance degradation or loss of functionality.
WARNING!
ESD SENSITIVE DEVICE
–4– REV.C
5 Page 
AD8350
CAC
CAC
RS RSHUNT
VS
8765
AD8350
–
RL
RS RSHUNT
1234
RL
CAC
CAC
ENBL (5V)
0.1F
+VS (5V TO 10V)
Figure 8. Gain Reduction Using Shunt Resistor
CAC
RFEXT
CAC
The insertion loss and the resultant power gain for multiple
shunt resistor values is summarized in Table I. The source
resistance and input impedance need careful attention when
using Equation 1. The reactance of the input impedance of the
AD8350 and the ac-coupling capacitors need to be considered
before assuming they have negligible contribution. Figure 10
shows the effective power gain for multiple values of RSHUNT for
the AD8350-15 and AD8350-20.
Table I. Gain Adjustment Using Shunt Resistor,
RS = 100 ⍀ and RIN = 100 ⍀ Single-Ended
RSHUNT–⍀
50
100
200
300
400
IL–dB
6.02
3.52
1.94
1.34
1.02
Power Gain–dB
AD8350-15
AD8350-20
8.98
11.48
13.06
13.66
13.98
13.98
16.48
18.06
18.66
18.98
RS
8765
RL
AD8350
VS –
RS RL
1234
CAC
ENBL
0.1F
CAC
(5V)
+VS
(5V TO 10V)
RFEXT
Figure 9. Dynamic Gain Reduction
Figure 8 shows a typical implementation of the shunt divider
concept. The reduced input impedance that results from the
parallel combination of the shunt resistor and the input impedance
of the AD8350 adds attenuation to the input signal effectively
reducing the gain. For frequencies less than 100 MHz, the input
impedance of the AD8350 can be modeled as a real 200 Ω resis-
tance (differential). Assuming the frequency is low enough to
ignore the shunt reactance of the input, and high enough such
that the reactance of moderately sized ac-coupling capacitors
can be considered negligible, the insertion loss, IL, due to the
shunt divider can be expressed as:
⎡
⎢
IL
(dB)
=
20
×
Log10
⎢
⎢
RIN
(RIN + RS )
RIN ʈRSHUNT
⎤
⎥
⎥
⎥
⎣⎢ (RIN ʈRSHUNT + RS ) ⎦⎥
where
(3)
RIN ʈRSHUNT
=
RIN
RIN
× RSHUNT
+ RSHUNT
and RIN
= 100Ω single−ended
20
18
16 AD8350-20
14
12
AD8350-15
10
8
6
4
2
0
0 100 200 300 400 500 600 700 800
RSHUNT – ⍀
Figure 10. Gain for Multiple Values of Shunt Resistance
for Circuit in Figure 8
The gain can be adjusted dynamically by employing external
feedback resistors as shown in Figure 9. The effective attenua-
tion is a result of the lowered input impedance as with the shunt
resistor method, yet there is no additional noise contribution at
the input of the device. It is necessary to use well-matched resistors
to minimize common-mode offset errors. Quality 1% tolerance
resistors should be used along with a symmetric board layout to
help guarantee balanced performance. The effective gain for mul-
tiple values of external feedback resistors is shown in Figure 11.
–10–
REV.C
11 Page | ||
| Páginas | Total 15 Páginas | |
| PDF Descargar | [ Datasheet AD8350.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| AD835 | 4-Quadrant Multiplier | Analog Devices |
| AD8350 | Low Distortion 1.0 GHz Differential Amplifier | Analog Devices |
| AD8351 | Low Distortion Differential RF/IF Amplifier | Analog Devices |
| AD8352 | 2 GHz Ultra Low Distortion Differential RF/IF Amplifier | 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 |