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PDF AD8351 Data sheet ( Hoja de datos )
| Número de pieza | AD8351 | |
| Descripción | Low Distortion Differential RF/IF Amplifier | |
| Fabricantes | Analog Devices | |
| Logotipo |  |
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Data Sheet
FEATURES
−3 dB bandwidth of 2.2 GHz for AV = 12 dB
Single resistor programmable gain: 0 dB ≤ AV ≤ 26 dB
Differential interface
Low noise input stage 2.7 nV/√Hz at AV = 10 dB
Low harmonic distortion
−79 dBc second at 70 MHz
−81 dBc third at 70 MHz
OIP3 of 31 dBm at 70 MHz
Single-supply operation: 3 V to 5.5 V
Low power dissipation: 28 mA at 5 V
Adjustable output common-mode voltage
Fast settling and overdrive recovery
Slew rate of 13,000 V/μs
Power-down capability
APPLICATIONS
Differential ADC drivers
Single-ended-to-differential conversion
IF sampling receivers
RF/IF gain blocks
SAW filter interfacing
GENERAL DESCRIPTION
The AD8351 is a low cost differential amplifier useful in RF and
IF applications up to 2.2 GHz. The voltage gain can be set from
unity to 26 dB using a single external gain resistor. The AD8351
provides a nominal 150 Ω differential output impedance. The
excellent distortion performance and low noise characteristics
of this device allow for a wide range of applications.
The AD8351 is designed to satisfy the demanding performance
requirements of communications transceiver applications. The
device can be used as a general-purpose gain block, an ADC
driver, and a high speed data interface driver, among other
functions. The AD8351 can also be used as a single-ended-to-
differential amplifier with similar distortion products as in the
Low Distortion
Differential RF/IF Amplifier
AD8351
FUNCTIONAL BLOCK DIAGRAM
PWUP
AD8351
BIAS CELL
RGP1
VOCM
VPOS
INHI
INLO
RGP2
OPHI
OPLO
COMM
0
–10
–20
–30
–40
–50
AD8351 WITH 10dB OF
GAIN DRIVING THE
AD6645 (RL = 1kΩ)
ANALOG INPUT = 70MHz
ENCORE = 80MHz
SNR = 69.1dB
FUND = –1.1dBFS
HD2 = –78.5dBc
HD3 = –80.7dBc
THD = –75.9dBc
SFDR = 78.2dBc
–60
–70
–80
–90 +
–100
–110
–120
–130
INHI
RG
200Ω
INLO
100nF 25Ω
AD8351
AD6645
14-BIT
ADC
100nF 25Ω
23
Figure 1.
differential configuration. The exceptionally good distortion
performance makes the AD8351 an ideal solution for 12-bit and
14-bit IF sampling receiver designs.
Fabricated in Analog Devices, Inc., high speed XFCB process,
the AD8351 has high bandwidth that provides high frequency
performance and low distortion. The quiescent current of the
AD8351 is 28 mA typically. The AD8351 amplifier comes in a
compact 10-lead MSOP package or in a 16-lead LFCSP package,
and operates over the temperature range of −40°C to +85°C.
Rev. D
Document Feedback
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 ©2003–2015 Analog Devices, Inc. All rights reserved.
Technical Support
www.analog.com
1 page  
AD8351
Data Sheet
Parameter
70 MHz
Second/Third Harmonic Distortion2
Third-Order IMD
Output Third-Order Intercept
Noise Spectral Density (RTI)
1 dB Compression Point
140 MHz
Second/Third Harmonic Distortion2
Third-Order IMD
Output Third-Order Intercept
Noise Spectral Density (RTI)
1 dB Compression Point
240 MHz
Second/Third Harmonic Distortion2
Third-Order IMD
Output Third-Order Intercept
Noise Spectral Density (RTI)
1 dB Compression Point
Test Conditions/Comments
RL = 1 kΩ, VOUT = 2 V p-p
RL = 150 Ω, VOUT = 2 V p-p
RL = 1 kΩ, f1 = 69.5 MHz, f2 = 70.5 MHz,
VOUT = 2 V p-p composite
RL = 150 Ω, f1 = 69.5 MHz, f2 = 70.5 MHz,
VOUT = 2 V p-p composite
f1 = 69.5 MHz, f2 = 70.5 MHz
RL = 1 kΩ, VOUT = 2 V p-p
RL = 150 Ω, VOUT = 2 V p-p
RL = 1 kΩ, f1 = 139.5 MHz, f2 = 140.5 MHz,
VOUT = 2 V p-p composite
RL = 150 Ω, f1 = 139.5 MHz, f2 = 140.5 MHz,
VOUT = 2 V p-p composite
f1 = 139.5 MHz, f2 = 140.5 MHz
RL = 1 kΩ, VOUT = 2 V p-p
RL = 150 Ω, VOUT = 2 V p-p
RL = 1 kΩ, f1 = 239.5 MHz, f2 = 240.5 MHz,
VOUT = 2 V p-p composite
RL = 150 Ω, f1 = 239.5 MHz, f2 = 240.5 MHz,
VOUT = 2 V p-p composite
f1 = 239.5 MHz, f2 = 240.5 MHz
1 Values are specified differentially.
2 See the Single-Ended-to-Differential Operation section for single-ended-to-differential performance.
Min Typ
−79/−81
−65/−66
−85
−69
31
2.70
13.3
−69/−69
−54/−53
−79
−67
29
2.75
13
−60/−66
−46/−50
−76
−62
27
2.90
13
Max Unit
dBc
dBc
dBc
dBc
dBm
nV/√Hz
dBm
dBc
dBc
dBc
dBc
dBm
nV/√Hz
dBm
dBc
dBc
dBc
dBc
dBm
nV/√Hz
dBm
Rev. D | Page 4 of 19
5 Page 
AD8351
4000
3500
3000
2500
2000
1500
1000
500
0
10
100
FREQUENCY (MHz)
0
–25
–50
–75
–100
1000
Data Sheet
3GHz
10MHz
10MHz
500MHz
3GHz
WITH 50Ω
TERMINATIONS
500MHz
WITHOUT
TERMINATIONS
160
150
140
130
120
110
100
10
Figure 22. Input Impedance vs. Frequency
30
25
20
15
10
5
100
FREQUENCY (MHz)
0
1000
Figure 25. Input Reflection Coefficient vs. Frequency (RS = RL = 100 Ω With
and Without 50 Ω Terminations)
3GHz
500MHz
10MHz
Figure 23. Output Impedance vs. Frequency
0
–2
–4
–6
–8
–10
–12
–14
–16
–18
0
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
1
0
25 50 75 100 125 150 175 200 225 250
FREQUENCY (MHz)
Figure 24. Phase and Group Delay (AV = 10 dB, at 5 V Supplies)
Figure 26. Output Reflection Coefficient vs. Frequency (RS = RL = 100 Ω)
Rev. D | Page 10 of 19
11 Page | ||
| Páginas | Total 20 Páginas | |
| PDF Descargar | [ Datasheet AD8351.PDF ] | |
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