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PDF ADA4930-1 Data sheet ( Hoja de datos )
| Número de pieza | ADA4930-1 | |
| Descripción | Ultralow Noise Drivers | |
| Fabricantes | Analog Devices | |
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Data Sheet
FEATURES
Low input voltage noise: 1.2 nV/√Hz
Low common-mode output: 0.9 V on single supply
Extremely low harmonic distortion
−104 dBc HD2 at 10 MHz
−79 dBc HD2 at 70 MHz
−73 dBc HD2 at 100 MHz
−101 dBc HD3 at 10 MHz
−82 dBc HD3 at 70 MHz
−75 dBc HD3 at 100 MHz
High speed
−3 dB bandwidth of 1.35 GHz, G = 1
Slew rate: 3400 V/μs, 25% to 75%
0.1 dB gain flatness to 380 MHz
Fast overdrive recovery of 1.5 ns
0.5 mV typical offset voltage
Externally adjustable gain
Differential-to-differential or single-ended-to-differential
operation
Adjustable output common-mode voltage
Single-supply operation: 3.3 V or 5 V
APPLICATIONS
ADC drivers
Single-ended-to-differential converters
IF and baseband gain blocks
Differential buffers
Line drivers
GENERAL DESCRIPTION
The ADA4930-1/ADA4930-2 are very low noise, low distortion,
high speed differential amplifiers. They are an ideal choice for
driving 1.8 V high performance ADCs with resolutions up to
14 bits from dc to 70 MHz. The adjustable output common
mode allows the ADA4930-1/ADA4930-2 to match the input of
the ADC. The internal common-mode feedback loop provides
exceptional output balance, suppression of even-order harmonic
distortion products, and dc level translation.
With the ADA4930-1/ADA4930-2, differential gain configurations
are easily realized with a simple external feedback network of
four resistors determining the closed-loop gain of the amplifier.
The ADA4930-1/ADA4930-2 are fabricated using Analog
Devices, Inc., proprietary silicon-germanium (SiGe), comple-
mentary bipolar process, enabling them to achieve very low
levels of distortion with an input voltage noise of only 1.2 nV/√Hz.
Rev. B
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.
Ultralow Noise
Drivers for Low Voltage ADCs
ADA4930-1/ADA4930-2
FUNCTIONAL BLOCK DIAGRAMS
–FB 1
+IN 2
–IN 3
+FB 4
ADA4930-1
12 PD
11 –OUT
10 +OUT
9 VOCM
Figure 1.
–IN1 1
+FB1 2
+VS1 3
+VS1 4
–FB2 5
+IN2 6
ADA4930-2
18 +OUT1
17 VOCM1
16
15
––VVSS22
14 PD2
13 –OUT2
Figure 2.
100
10
1
0
10 100 1k 10k 100k 1M 10M 100M
FREQUENCY (Hz)
Figure 3. Voltage Noise Spectral Density
The low dc offset and excellent dynamic performance of the
ADA4930-1/ADA4930-2 make them well suited for a wide
variety of data acquisition and signal processing applications.
The ADA4930-1 is available in a Pb-free, 3 mm × 3 mm 16-lead
LFCSP, and the ADA4930-2 is available in a Pb-free, 4 mm × 4 mm
24-lead LFCSP. The pinout has been optimized to facilitate printed
circuit board (PCB) layout and minimize distortion. The
ADA4930-1 is specified to operate over the −40°C to +105°C
temperature range, and the ADA4930-2 is specified to operate over
the −40°C to +105°C temperature range for 3.3 V or 5 V supply
voltages.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700 ©2010–2015 Analog Devices, Inc. All rights reserved.
Technical Support
www.analog.com
1 page  
Data Sheet
ADA4930-1/ADA4930-2
5 V OPERATION
VS = 5 V, VICM = 0.9 V, VOCM = 0.9 V, RF = 301 Ω, RG = 301 Ω, RL, dm = 1 kΩ, single-ended input, differential output, TA= 25°C,
TMIN to TMAX = −40°C to +105°C, unless otherwise noted.
Table 4.
Parameter
DYNAMIC PERFORMANCE
−3 dB Small Signal Bandwidth
−3 dB Large Signal Bandwidth
Bandwidth for 0.1 dB Flatness
ADA4930-1
ADA4930-2
Slew Rate
Settling Time to 0.1%
Overdrive Recovery Time
NOISE/HARMONIC PERFORMANCE
HD2/HD3
Third-Order IMD
Input Voltage Noise
Input Current Noise
Crosstalk
DC PERFORMANCE
Input Offset Voltage
Input Offset Voltage Drift
Input Bias Current
Input Bias Current Drift
Input Offset Current
Open-Loop Gain
INPUT CHARACTERISTICS
Input Common-Mode Voltage Range
Input Resistance
Input Capacitance
CMRR
OUTPUT CHARACTERISTICS
Output Voltage
Linear Output Current
Output Balance Error
Test Conditions/Comments
VO, dm = 0.1 V p-p
VO, dm = 2 V p-p
VO, dm = 0.1 V p-p
VO, dm = 2 V step, 25% to 75%
VO, dm = 2 V step, RL = 200 Ω
G = 3, VIN, dm = 0.7 V p-p pulse
VO, dm = 2 V p-p, fC = 10 MHz
VO, dm = 2 V p-p, fC = 30 MHz
VO, dm = 2 V p-p, fC = 70 MHz
VO, dm = 2 V p-p, fC = 100 MHz
VO, dm = 1 V p-p/tone, fC = 70.05 MHz ± 0.05 MHz
VO, dm = 1 V p-p/tone, fC = 140.05 MHz ± 0.05 MHz
f = 100 kHz
f = 100 kHz
f = 100 MHz, ADA4930-2, RL = 200 Ω
VIP = VIN = VOCM = 0 V, RL = open circuit
TMIN to TMAX
TMIN to TMAX
RF = RG = 10 kΩ, ΔVO = 1 V, RL = open circuit
Differential
Common mode
Common mode
ΔVICM = 1 V dc; RF = RG = 10 kΩ, RL = open circuit
Each single-ended output; RF = RG = 10 kΩ
Each single-ended output; f = 1 MHz, TDH ≤ 60 dBc
f = 1 MHz
Min Typ
Max Unit
1350
937
MHz
MHz
369
90
3400
6
1.5
MHz
MHz
V/μs
ns
ns
−104/−101
−91/−93
−79/−82
−73/−75
94
90
1.2
2.8
−90
dB
dB
dB
dB
dBc
dBc
nV/√Hz
pA/√Hz
dB
−3.1
−34
−0.82
−0.15
1.8
−23
−0.05
+0.1
64
+3.1
−15
+0.82
mV
μV/°C
μA
μA/C
μA
dB
0.3
150
3
1
−82
2.8 V
kΩ
MΩ
pF
−77 dB
0.18
30
55
3.38 V
mA
dB
Rev. B | Page 5 of 25
5 Page 
Data Sheet
–60
–65
–70
–75
–80 HD2, VS = 3.3V
–85
HD3, VS = 3.3V
HD2, VS = 5.0V
–90 HD3, VS = 5.0V
–95
–100
–105
–110
1M
10M
FREQUENCY (Hz)
100M 200M
Figure 19. ADA4930-1 Harmonic Distortion vs. Frequency
at VS = 3.3 V and VS = 5 V
–40
10MHz, HD2
–50 10MHz, HD3
70MHz, HD2
70MHz, HD3
–60
–70
–80
–90
–100
–110
–120
0.4 0.5 0.6 0.7 0.8 0.9 1.0 1.1
VOCM ABOVE – VS (V)
Figure 20. Harmonic Distortion vs. VOCM at VS = 3.3 V
at 10 MHz and 70 MHz
1.2
0
HD2, VOUT = 1V p-p
–20 HD3, VOUT = 1V p-p
HD2, VOUT = 2V p-p
HD3, VOUT = 2V p-p
–40
–60
–80
–100
–120
–140
1M
10M
FREQUENCY (Hz)
100M
Figure 21. Distortion vs. VOUT at VS = 3.3 V
200M
ADA4930-1/ADA4930-2
–20
–40
–60
–80
–100
HD2, 3.3V
HD3, 3.3V
HD2, 5.0V
HD3, 5.0V
–120
–140
1.0 1.5 2.0 2.5 3.0
VOUT (V p-p)
Figure 22. Harmonic Distortion vs. Output @ 10 MHz
3.5
–40
–50
–60 10MHz, HD2
10MHz, HD3
70MHz, HD2
–70 70MHz, HD3
–80
–90
–100
–110
0.5
20
1.0 1.5 2.0 2.5
VOCM ABOVE – VS (V)
Figure 23. Harmonic Distortion vs. VOCM
at 10 MHz and 70 MHz
0
–20
–40
–60
–80
–100
–120
–140
69.8
69.9 70.0 70.1 70.2
FREQUENCY (MHz)
Figure 24. 70 MHz Intermodulation Distortion
3.0
70.3
Rev. B | Page 11 of 25
11 Page | ||
| Páginas | Total 25 Páginas | |
| PDF Descargar | [ Datasheet ADA4930-1.PDF ] | |
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