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PDF ADA4830-1 Data sheet ( Hoja de datos )
| Número de pieza | ADA4830-1 | |
| Descripción | High Speed Difference Amplifier | |
| Fabricantes | Analog Devices | |
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Data Sheet
High Speed Difference Amplifier with Input
Short-to-Battery Protection
ADA4830-1/ADA4830-2
FEATURES
Input overvoltage (short-to-battery) protection of up to 18 V
Short-to-battery output flag for wire diagnostics
Wide input common-mode range with single 5 V supply
High performance video amplifier with 0.50 V/V gain
−3 dB bandwidth of 84 MHz
250 V/µs slew rate (2 V step)
Excellent video specifications
0.1 dB flatness to 28 MHz
SNR of 73 dB to 15 MHz
Differential gain/phase of 0.1%/0.1°
Wide supply range: 2.9 V to 5.5 V
Enable/output disable mode
Space saving 3 mm × 3 mm LFCSP package
Wide operating temperature range: −40°C to +125°C
Qualified for automotive applications
APPLICATIONS
Automotive vision systems
Automotive infotainment
Surveillance systems
GENERAL DESCRIPTION
The ADA4830-1 (single) and ADA4830-2 (dual) are monolithic,
high speed difference amplifiers that integrate input overvoltage
(short-to-battery) protection of up to 18 V with a wide input
common-mode voltage range and excellent ESD robustness.
They are intended for use as receivers for differential or pseudo
differential CVBS and other high speed video signals in harsh,
noisy environments such as automotive infotainment and vision
systems. The ADA4830-1 and ADA4830-2 combine high speed
and precision, which allows for accurate reproduction of CVBS
video signals, yet rejects unwanted common-mode error voltages.
The short-to-battery protection that is integrated into the
ADA4830-1 and ADA4830-2 employs fast switching circuitry to
clamp and hold internal voltage nodes at a safe level when an input
overvoltage condition is detected. This protection allows the inputs
of the ADA4830-1 and ADA4830-2 to be directly connected to a
remote video source, such as a rearview camera, without the
need for large expensive series capacitors. The ADA4830-1 and
ADA4830-2 can withstand direct short-to-battery voltages as
high as 18 V on their input pins.
The ADA4830-1 and ADA4830-2 are designed to operate at supply
voltages as low as 2.9 V and as high as 5.5 V, using only 6.8 mA
of supply current per channel. These devices provide true single-
supply capability, allowing the input signal to extend 8.5 V
Rev. C
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibilityisassumedbyAnalogDevices for itsuse,nor foranyinfringementsofpatentsor 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.
FUNCTIONAL BLOCK DIAGRAM
ENA
+VS
STB
+VS
ADA4830-1
VREF
R/2
×1
INP
INN
VREF1
R
R
R/2
GND
Figure 1.
ENA1
+VS1
STB1
+VS
ADA4830-2
R/2
×1
VOUT
INP1
INN1
GND1
INN2
INP2
+VS
R
R
R/2
R R/2
R
VOUT1
GND2
VOUT2
VREF2
×1
R/2
ENA2
+VS2
Figure 2.
STB2
below ground rail and to 8.5 V above ground on a single 5 V
supply. At the output, the amplifier can swing to within 250 mV
of either supply rail into a 150 Ω load.
The ADA4830-1 and ADA4830-2 present a gain of 0.50 V/V at their
output. This is designed to keep the video signal within the allowed
range of the video decoder, which is typically 1 V p-p or less.
The ADA4830-1W and ADA4830-2W are automotive grade
version, qualified for automotive applications. See the
Automotive Products section for more details.
The ADA4830-1 and ADA4830-2 are available in 3 mm × 3 mm
LFCSP packages, 8-lead and 16-lead, respectively, and are specified
for operation over the automotive temperature range of −40°C
to +125°C.
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 ©2011–2012 Analog Devices, Inc. All rights reserved.
1 page  
Data Sheet
ADA4830-1/ADA4830-2
Parameter
VOLTAGE REFERENCE INPUT
Input Voltage Range
Input Resistance
Gain
LOGIC OUTPUT/INPUT CHARACTERISTICS
STB VOH
STB VOL
ENA VIH
ENA VIL
OUTPUT CHARACTERISTICS
Output Voltage Swing
Linear Output Current
Short-Circuit Current
Capacitive Load Drive
POWER SUPPLY
Operating Range
Quiescent Current per Amplifier
Power Supply Rejection Ratio (PSRR)
OPERATING TEMPERATURE RANGE
Test Conditions/Comments
VREF to VOUT
VIN ≤ 7.4 V (normal operation)
VIN ≥ 8.2 V (fault condition), ADA4830-1/ADA4830-2
Voltage to enable device
Voltage to disable device
RL = 150 Ω to ground
<1% THD at 100 kHz
Sourcing/sinking
Peaking ≤ 4 dB
Operation outside of this range results in
performance degradation
Enabled (ENA = 3.3 V), no load
ADA4830-1W/ADA4830-2W only TMIN to TMAX
Disabled (ENA = 0 V), no load
VIN = 18 V (short-to-battery), no load
+VS = 3.0 V to 3.6 V, VREF forced to 1.65 V
Min
2.9
−40
Typ Max Unit
0.2 to 2.2
20
1
V
kΩ
V/V
3.3
85/178
≥1.8
≤0.8
V
mV
V
V
0.01 to 3.08
50
85/180
47
V
mA
mA
pF
5.5 V
5.5 8.0 mA
8.4 mA
60 µA
4.3 mA
42 dB
+125 °C
Rev. C | Page 5 of 22
5 Page 
Data Sheet
2.9
RL = 1kΩ
2.7
+VS = 3.3V
VOUT = 1V p-p
2.5 RL = 150Ω
2.3
2.1
1.9
1.7
1.5
0
10 20 30 40 50 60 70 80
TIME (ns)
Figure 18. Pulse Response at +VS = 3.3 V
16
CSTB = 11pF
14
INP
12
10
8
RSTB = 500Ω
6
4
RSTB = 5kΩ
2
RSTB = 1kΩ
0
–2
0 50 100 150 200 250 300 350 400 450 500
TIME (ns)
Figure 19. Short-to-Battery Output Flag Response for Various RSTB, ADA4830-1
6
5
ENA
4
3
VOUT
2
1
0
–1
0 100 200 300 400 500
TIME (ns)
Figure 20. Enable Turn-on/Turn-off Time
600
ADA4830-1/ADA4830-2
40
30
20
10 +VS = 3.3V
0
+VS = 5V
–10
–20
–12 –10 –8 –6 –4 –2 0 2 4 6 8 10 12 14
INPUT COMMON-MODE VOLTAGE (V)
Figure 21. Output Offset Voltage (VOUT − VREF) vs.
Input Common-Mode Voltage
10
9
8 +VS = 3.3V
7
6
5
4
+VS = 5V
3
2
1
VINP, VINN = FLOATING
0
0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
ENABLE VOLTAGE (V)
Figure 22. Supply Current vs. Enable Voltage
140
120
100
80
60
40
20
0
46 51 56 61 66 71 76 81 86 91
CMR (dB)
Figure 23. Typical Distribution of Common-Mode Rejection
Rev. C | Page 11 of 22
11 Page | ||
| Páginas | Total 22 Páginas | |
| PDF Descargar | [ Datasheet ADA4830-1.PDF ] | |
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