AD ADA4432-1BRJZ-R7 Sd video filter amplifier Datasheet

FEATURES
FUNCTIONAL BLOCK DIAGRAMS
ENA
ADA4432-1
IN
×1
×2
GENERAL DESCRIPTION
The ADA4432-1 (single-ended output) and ADA4433-1
(differential output) are fully integrated video reconstruction
filters that combine overvoltage protection (short-to-battery [STB]
protection) and short-to-ground (STG) protection on the outputs,
with excellent video specifications and low power consumption.
The combination of STB protection and robust ESD tolerance
allows the ADA4432-1 and the ADA4433-1 to provide superior
protection in the hostile automotive environment.
The ADA4432-1 is a single-ended input/single-ended output
video filter capable of driving long back-terminated cables.
The ADA4433-1 is a fully differential video filter that can be
used as a fully differential input to a differential output or as a
single-ended input to a differential output, allowing it to easily
connect to both differential and single-ended sources. It is
capable of driving twisted pair or coaxial cable with minimal
line attenuation. Differential signal processing reduces the effects
of ground noise, which can plague ground referenced systems.
The ADA4433-1 is ideal for differential signal processing (gain
and filtering) throughout the signal chain, simplifying the
conversion between single-ended and differential components.
STB
OUT
SD
OFFSET
GND
Figure 1.
ENA
+VS
STB
ADA4433-1
2R
+IN
×1
SD
APPLICATIONS
Automotive rearview cameras
Automotive video electronic control units (ECUs)
Surveillance video systems
STB
(LFCSP ONLY)
+VS
10597-001
Qualified for automotive applications
Output overvoltage (short-to-battery) protection up to 18 V
Short-to-battery output flag for wire diagnostics
Output short-to-ground protection
Fifth-order, low-pass video filter
0.1 dB flatness to 3 MHz
−3 dB bandwidth of 10 MHz
45 dB rejection at 27 MHz
Ultralow power-down current: 13.5 µA typical
Low quiescent current
7.6 mA typical (ADA4432-1)
13.2 mA typical (ADA4433-1)
Low supply voltage: 2.6 V to 3.6 V
Small packaging
8-lead, 3 mm × 3 mm LFCSP
6-lead SOT-23 (ADA4432-1 only)
Wide operating temperature range: −40°C to +125°C
R
R
–IN
+
STB
–OUT
–
STB
+OUT
×1
2R
SD
GND
10597-002
Data Sheet
SD Video Filter Amplifiers
with Output Short-to-Battery Protection
ADA4432-1/ADA4433-1
Figure 2.
The short-to-battery protection integrated into the ADA4432-1
and ADA4433-1 protects against both dc and transient
overvoltage events, caused by an accidental short to a battery
voltage up to 18 V. The Analog Devices, Inc., short-to-battery
protection eliminates the need for large output coupling capacitors
and other complicated circuits used to protect standard video
amplifiers, saving space and cost.
The ADA4432-1 and ADA4433-1 feature a high-order filter with
−3 dB cutoff frequency response at 10 MHz and 45 dB of rejection
at 27 MHz. The ADA4432-1 and ADA4433-1 feature an internally
fixed gain of 2 V/V. This makes the ADA4432-1 and ADA4433-1
ideal for SD video applications, including NTSC and PAL.
The ADA4432-1 and ADA4433-1 operate on single supplies as
low as 2.6 V and as high as 3.6 V while providing the dynamic
range required by the most demanding video systems.
The ADA4432-1 and ADA4433-1 are offered in an 8-lead, 3 mm ×
3 mm LFCSP package. The ADA4432-1 is also available in a
6-lead SOT-23 package. All are rated for operation over the
wide automotive temperature range of −40°C to +125°C.
Rev. A
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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
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Fax: 781.461.3113
©2012 Analog Devices, Inc. All rights reserved.
ADA4432-1/ADA4433-1
Data Sheet
TABLE OF CONTENTS
Features .............................................................................................. 1
Overvoltage (Short-to-Battery) Protection ................................ 15
Applications ....................................................................................... 1
Short-to-Battery Output Flag ................................................... 15
General Description ......................................................................... 1
ESD Protection ........................................................................... 16
Functional Block Diagrams ............................................................. 1
Enable/Disable Modes (ENA Pin) ........................................... 16
Revision History ............................................................................... 2
Operating Supply Voltage Range.............................................. 16
Specifications..................................................................................... 3
Applications Information .............................................................. 17
ADA4432-1 Specifications .......................................................... 3
Methods of Transmission .......................................................... 17
ADA4433-1 Specifications .......................................................... 4
Printed Circuit Board (PCB) Layout ....................................... 17
Absolute Maximum Ratings ............................................................ 6
Configuring the ADA4433-1 for Single-Ended Input Signals ... 18
Thermal Resistance ...................................................................... 6
Pin-Compatible ADA4432-1 and ADA4433-1 ...................... 19
Maximum Power Dissipation ..................................................... 6
Typical Application Circuits ..................................................... 20
ESD Caution .................................................................................. 6
Fully DC-Coupled Transmission Line .................................... 22
Pin Configuration and Function Descriptions ............................. 7
Low Power Considerations....................................................... 23
Typical Performance Characteristics ............................................. 9
Outline Dimensions ....................................................................... 24
ADA4432-1 Typical Performance Characteristics ................... 9
Ordering Guide .......................................................................... 25
ADA4433-1 Typical Performance Characteristics ................. 12
Automotive Products ................................................................. 25
Theory of Operation ...................................................................... 15
Short Circuit (Short-to-Ground) Protection .............................. 15
REVISION HISTORY
5/12—Rev. 0 to Rev. A
Added ADA4432-1 and 6-Lead SOT-23 ......................... Universal
Added Figure 1; Renumbered Sequentially .................................. 1
Added Table 1; Renumbered Sequentially .................................... 3
Changes to Table 2 ............................................................................ 4
Added Figure 4, Figure 5, Table 5, and Table 6............................. 7
Added Figure 7 to Figure 24............................................................ 9
Changes to Operating Supply Voltage Range Section ............... 16
Added Methods of Transmission Section, Pseudo Differential
Mode (Unbalanced Source Termination) Section, Figure 43,
Pseudo Differential Mode (Balanced Source Impedance)
Section and Figure 44 ..................................................................... 17
Changed Fully Differential Transmission Mode Section to Fully
Differential Mode Section ............................................................. 17
Added Pin Compatible ADA4432-1 and ADA4433-1 Section,
Example Configuration for Package-Compatible PCB Section,
and Figure 48 to Figure 51 ............................................................ 19
Added Figure 52 ............................................................................. 20
Added Figure 54 ............................................................................. 22
Added Low Power Consideration, Figure 56, and Figure 57.... 23
Updated Outline Dimensions ....................................................... 24
Changes to Ordering Guide .......................................................... 25
4/12—Revision 0: Initial Version
Rev. A | Page 2 of 28
Data Sheet
ADA4432-1/ADA4433-1
SPECIFICATIONS
ADA4432-1 SPECIFICATIONS
TA = 25°C, +VS = 3.3 V, RL = 150 Ω, unless otherwise specified.
Table 1.
Parameter
DYNAMIC PERFORMANCE
−3 dB Small Signal Bandwidth
−3 dB Large Signal Bandwidth
1 dB Flatness
0.1 dB Flatness
Out-of-Band Rejection
Differential Gain
Differential Phase
Group Delay Variation
Pass Band Gain
Test Conditions/Comments
VOUT = 0.2 V p-p
VOUT = 2 V p-p
ADA4432-1W only: TMIN to TMAX
VOUT = 2 V p-p
ADA4432-1W only: TMIN to TMAX
VOUT = 2 V p-p
f = 27 MHz, VOUT = 2 V p-p
ADA4432-1W only: TMIN to TMAX
Modulated 10-step ramp, sync tip at 0 V
Modulated 10-step ramp, sync tip at 0 V
f = 100 kHz to 5 MHz
ADA4432-1W only: TMIN to TMAX
NOISE/HARMONIC PERFORMANCE
Signal-to-Noise Ratio
INPUT CHARACTERISTICS
Input Voltage Range
Input Resistance
Input Capacitance
Input Bias Current
OUTPUT CHARACTERISTICS
Output Offset Voltage
Output Voltage Swing
Disconnect Time
Reconnect Time
POWER SUPPLY
Power Supply Range 1
Quiescent Current
Quiescent Current, Disabled
Quiescent Current, Short-to-Battery
Quiescent Current, Short to Ground
PSRR
ENABLE PIN
Input Leakage Current
9.3
8.6
8.3
7.6
37
35
5.80
5.57
100% white signal, f = 100 kHz to 5 MHz
Limited by the output voltage range
ADA4432-1W only: TMIN to TMAX
Typ
Max
Unit
6.24
6.44
MHz
MHz
MHz
MHz
MHz
MHz
dB
dB
%
Degrees
ns
dB
dB
10.5
10.5
9.4
3.3
43
0.38
0.69
8
6
70
0 to 1.34
0 to 1.3
0 to 1.4
dB
0 to 1.45
0 to 1.47
V
V
GΩ
pF
pA
280
300
+VS − 0.42
+VS − 0.45
mV
mV
V
V
mA
mA
18
18
8.1
8.4
V
V
V
V
ns
ns
3.6
10
13
20
25
>1.0
8
35
VIN = 0 V
ADA4432-1W only: TMIN to TMAX
RL = 150 Ω
ADA4432-1W only: TMIN to TMAX
Linear Output Current
Short-Circuit Output Current
SHORT-TO-BATTERY
Overvoltage Protection Range
STB Output Trigger Threshold
Min
192
0.28
0.30
±37
±50
ADA4432-1W only: TMIN to TMAX
Back termination = 75 Ω
ADA4432-1W only: TMIN to TMAX
After the fault is applied
After the fault is removed
+VS
+VS
6.3
6.0
7.2
150
300
No input signal, no load
ADA4432-1W only: TMIN to TMAX
ENA = 0 V
ADA4432-1W only: TMIN to TMAX
Short-to-battery fault condition: 18 V
Short on far end of output termination (75 Ω)
Δ+VS RIPPLE = ±0.3 V, f = dc
2.6
4.6
47
−63
V
mA
mA
µA
µA
mA
mA
dB
ENA = high/low
+0.3/−14
µA
Rev. A | Page 3 of 28
7.6
14
ADA4432-1/ADA4433-1
Parameter
LOGIC OUTPUT/INPUT LEVELS
STB VOH
STB VOL
ENA VIH
ENA VIL
OPERATING TEMPERATURE RANGE
1
Data Sheet
Test Conditions/Comments
Min
VOUT ≥ 7.2 V (fault condition)
VOUT ≤ 3.1 V (normal operation)
Input voltage to enable device
Input voltage to disable device
Typ
Max
Unit
+125
V
mV
V
V
°C
Max
Unit
6.15
6.28
MHz
MHz
MHz
MHz
MHz
MHz
dB
dB
%
Degrees
ns
dB
dB
3.3
0.02
≥2.4
≤0.6
−40
Recommended range for optimal performance. Exceeding this range is not recommended.
ADA4433-1 SPECIFICATIONS
TA = 25°C, +VS = 3.3 V, V−IN = 0.5 V, RL = 150 Ω, unless otherwise specified.
Table 2.
Parameter
DYNAMIC PERFORMANCE
−3 dB Small Signal Bandwidth
−3 dB Large Signal Bandwidth
1 dB Flatness
0.1 dB Flatness
Out-of-Band Rejection
Differential Gain
Differential Phase
Group Delay Variation
Pass Band Gain
Test Conditions/Comments
VOUT = 0.2 V p-p
VOUT = 2 V p-p
ADA4433-1W only: TMIN to TMAX
VOUT = 2 V p-p
ADA4433-1W only: TMIN to TMAX
VOUT = 2 V p-p
f = 27 MHz
ADA4433-1W only: TMIN to TMAX
Modulated 10-step ramp, sync tip at 0 V
Modulated 10-step ramp, sync tip at 0 V
f = 100 kHz to 5 MHz
ADA4433-1W only: TMIN to TMAX
NOISE/HARMONIC PERFORMANCE
Signal-to-Noise Ratio
INPUT CHARACTERISTICS
Input Common-Mode Voltage Range
Input Resistance
Input Capacitance
Input Bias Current
CMRR
OUTPUT CHARACTERISTICS
Output Offset Voltage
Output Voltage Swing
Linear Output Current
Short-Circuit Output Current
Output Balance Error
SHORT-TO-BATTERY
Protection Range
STB Output Trigger Threshold
Disconnect Time
Reconnect Time
Min
8.8
8.2
7.7
7.2
41
39
5.89
5.71
100% white signal, f = 100 kHz to 5 MHz
ADA4433-1W only: TMIN to TMAX
Differential
Common mode
Common mode
0 to 2.1
0 to 2.0
Rev. A | Page 4 of 28
8.7
3
45
0.5
1.7
8
6
0 to 2.2
dB
0 to 2.3
0 to 2.5
V
V
kΩ
kΩ
pF
pA
dB
1.9
1.9
+VS − 0.55
+VS – 0.6
V
V
V
V
mA
mA
dB
18
18
5.7
6.0
V
V
V
V
ns
ns
800
400
1.8
30
−55
1.65
0.54
0.6
±29
±60
−50
DC to f = 100 kHz, VIN = 0.5 V p-p
ADA4433-1W only: TMIN to TMAX
Each output back termination = 37.5 Ω
ADA4433-1W only: TMIN to TMAX
After the fault is applied
After the fault is removed
9.9
9.9
67
V−IN = V+IN = 0.1 V to 1.1 V
V+IN = V−IN = 0 V
ADA4433-1W only: TMIN to TMAX
Each single-ended output, RL, dm = 150 Ω
ADA4433-1W only: TMIN to TMAX
Typ
+VS
+VS
5.0
4.9
5.4
150
300
Data Sheet
Parameter
POWER SUPPLY
Power Supply Range 1
Quiescent Current
Quiescent Current, Disabled
Quiescent Current, Short-to-Battery
Quiescent Current, Short-to-Ground
PSRR
ENABLE PIN
Input Leakage Current
LOGIC OUTPUT/INPUT LEVELS
STB VOH
STB VOL
ENA VIH
ENA VIL
OPERATING TEMPERATURE RANGE
1
ADA4432-1/ADA4433-1
Test Conditions/Comments
Min
Typ
2.6
Max
Unit
3.6
18
19
22
30
No input signal, no load
ADA4433-1W only: TMIN to TMAX
ENA = 0 V
ADA4433-1W only: TMIN to TMAX
Short-to-battery fault condition: 18 V
Short on far end of output termination (37.5 Ω)
Δ+VS RIPPLE = ±0.3 V, f = dc
18
60
−80
V
mA
mA
µA
µA
mA
mA
dB
ENA = high/low
+0.3/−14
µA
VOUT ≥ 5.7 V (fault condition)
VOUT ≤ 3 V (normal operation)
Input voltage to enable device
Input voltage to disable device
3.3
0.02
≥2.4
≤0.6
V
V
V
V
°C
13.2
13.5
−40
Recommended range for optimal performance. Exceeding this range is not recommended.
Rev. A | Page 5 of 28
+125
ADA4432-1/ADA4433-1
Data Sheet
ABSOLUTE MAXIMUM RATINGS
Rating
4V
22 V
+VS
See Figure 3
−65°C to +125°C
−40°C to +125°C
260°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.
Airflow increases heat dissipation, effectively reducing θJA.
Figure 3 shows the maximum power dissipation in the package
vs. the ambient temperature for the 6-lead SOT-23 (170°C/W)
and the 8-lead LFCSP (50°C/W) on a JEDEC standard 4-layer
board. θJA values are approximate.
5
TJ = 150°C
THERMAL RESISTANCE
θJA is specified for the device soldered to a high thermal
conductivity 4-layer (2s2p) circuit board, as described in
EIA/JESD 51-7.
Table 4.
Package Type
6-Lead SOT-23
8-Lead LFCSP
θJA
170
50
θJC
Not applicable
5
Unit
°C/W
°C/W
MAXIMUM POWER DISSIPATION
4
3
LFCSP
2
SOT-23
1
0
–40
The maximum safe power dissipation in the ADA4432-1 and
ADA4433-1 packages are 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. Exceeding a junction temperature of 150°C for an
extended time can result in changes in the silicon devices,
potentially causing failure.
–20
0
20
40
60
80
100
AMBIENT TEMPERATURE (ºC)
Figure 3. Maximum Power Dissipation vs.
Ambient Temperature for a 4-Layer Board
ESD CAUTION
Rev. A | Page 6 of 28
120
10597-003
Parameter
Supply Voltage
Output Common-Mode Voltage
Input Differential Voltage
Power Dissipation
Storage Temperature Range
Operating Temperature Range
Lead Temperature (Soldering, 10 sec)
Junction Temperature
The power dissipated in the package (PD) is the sum of the
quiescent power dissipation and the power dissipated in the
package due to the load drive for all outputs. The quiescent
power is the voltage between the supply pins (VS) times the
quiescent current (IS). The power dissipated due to the load drive
depends on the particular application. For each output, the
power due to load drive is calculated by multiplying the load
current by the associated voltage drop across the device. The
power dissipated due to the loads is equal to the sum of the
power dissipations due to each individual load. RMS voltages
and currents must be used in these calculations.
MAXIMUM POWER DISSIPATION (W)
Table 3.
Data Sheet
ADA4432-1/ADA4433-1
PIN CONFIGURATION AND FUNCTION DESCRIPTIONS
ADA4432-1
ADA4432-1
+VS 3
OUT 4
TOP VIEW
(Not to
Scale)
IN 1
7 ENA
5 NC
NOTES
1. NC = NO CONNECT.
2. THE EXPOSED PAD CAN BE CONNECTED
TO THE GROUND PLANE.
6
+VS
TOP VIEW
GND 2 (Not to Scale) 5 ENA
6 GND
NC 3
NOTES:
1. NC = NO CONNECT.
10597-004
STB 2
8 IN
Figure 4. ADA4432-1 LFCSP Pin Configuration, Top View
4
OUT
10597-005
NC 1
Figure 5. ADA4432-1 SOT-23 Pin Configuration, Top View
Table 5. ADA4432-1 LFCSP Pin Function Descriptions
Table 6. ADA4432-1 SOT-23 Pin Function Descriptions
Pin
No.
1
2
Mnemonic
NC
STB
3
+VS
Pin
No.
1
2
3
4
5
Mnemonic
IN
GND
NC
OUT
ENA
4
5
6
7
OUT
NC
GND
ENA
6
+VS
8
IN
EPAD
Description
No Connect. Do not connect to this pin.
Short-to-Battery Indicator Output. A logic
high indicates a short-to-battery condition,
and a logic low indicates normal operation.
Positive Power Supply. Bypass with 0.1 µF
capacitor to GND.
Amplifier Output.
No Connect. Do not connect to this pin.
Power Supply Ground Pin.
Enable Function. Connect to +VS or float for
normal operation; connect to GND for
device disable.
Input.
The exposed pad can be connected to the
ground plane.
Rev. A | Page 7 of 28
Description
Input.
Power Supply Ground Pin.
No Connect. Do not connect to this pin.
Amplifier Output.
Enable Function. Connect to +VS or float for
normal operation; connect to GND for
device disable.
Positive Power Supply. Bypass with 0.1 µF
capacitor to GND.
ADA4432-1/ADA4433-1
Data Sheet
ADA4433-1
–IN 1
+VS 3
+OUT 4
8 +IN
TOP VIEW
(Not to
Scale)
7 ENA
6 GND
5 –OUT
NOTES
1. THE EXPOSED PAD CAN BE CONNECTED
TO THE GROUND PLANE.
10597-006
STB 2
Figure 6. ADA4433-1 LFCSP Pin Configuration, Top View
Table 7. ADA4433-1 LFCSP Pin Function Descriptions
Pin No.
1
2
Mnemonic
−IN
STB
3
4
5
6
7
8
+VS
+OUT
−OUT
GND
ENA
+IN
EPAD
Description
Inverting Input.
Short-to-Battery Indicator Output. A logic high indicates a short-to-battery condition, and a logic low indicates
normal operation.
Positive Power Supply. Bypass with a 0.1 µF capacitor to GND.
Noninverting Output.
Inverting Output.
Ground.
Enable Function. Connect to +VS or float for normal operation; connect to GND for device disable.
Noninverting Input.
The exposed pad can be connected to the ground plane.
Rev. A | Page 8 of 28
Data Sheet
ADA4432-1/ADA4433-1
TYPICAL PERFORMANCE CHARACTERISTICS
ADA4432-1 TYPICAL PERFORMANCE CHARACTERISTICS
TA = 25°C, +VS = 3.3 V, RL = 150 Ω, unless otherwise specified.
12
6.5
VOUT = 0.2V p-p
6
6.0
VOUT = 0.2V p-p
0
VOUT = 2.0V p-p
–6
VOUT = 2.0V p-p
5.5
–18
GAIN (dB)
GAIN (dB)
–12
–24
–30
–36
–42
5.0
4.5
4.0
–48
–54
3.5
1
10
100
FREQUENCY (MHz)
3.0
0.1
10597-040
–66
0.1
6.5
VOUT = 2.0V p-p
6.0
0
–40°C
–6
+125°C
5.5
–12
–18
GAIN (dB)
GAIN (dB)
100
Figure 10. 1 dB Flatness Response at Various Output Amplitudes
VOUT = 2.0V p-p
6
10
FREQUENCY (MHz)
Figure 7. Frequency Response at Various Output Amplitudes
12
1
10597-048
–60
+125°C
–24
–30
+25°C
–36
–40°C
–42
+25°C
5.0
4.5
4.0
–48
–54
3.5
1
10
100
FREQUENCY (MHz)
3.0
0.1
10597-041
Figure 11. 1 dB Flatness Response at Various Temperatures
RLOAD = 75Ω
90
6.5
80
GROUP DELAY (ns)
6.0
RLOAD = 100Ω
5.5
RLOAD = 150Ω
5.0
4.5
4.0
70
60
50
40
30
3.5
20
1
10
FREQUENCY (MHz)
10
0.1
10597-042
GAIN (dB)
100
100
VOUT = 2.0V p-p
3.0
0.1
10
FREQUENCY (MHz)
Figure 8. Large Signal Frequency Response at Various Temperatures
7.0
1
1
10
FREQUENCY (MHz)
Figure 9. 1 dB Flatness Response at Various Load Resistances
Figure 12. Group Delay vs. Frequency
Rev. A | Page 9 of 28
100
10597-050
–66
0.1
10597-049
–60
ADA4432-1/ADA4433-1
1.5
f = 3.58MHz
f = 3.58MHz
DIFFERENTIAL PHASE (Degrees)
DIFFERENTIAL GAIN (%)
1.0
0.5
0
–0.5
–1.5
0
1
2
3
4
5
6
7
8
9
10
11
10597-043
–1.0
1.0
0.5
0
–0.5
–1.0
–1.5
0
1
2
3
4
5
6
7
8
9
10
11
10597-051
1.5
Data Sheet
Figure 16. Differential Phase Plot
Figure 13. Differential Gain Plot
6.05
60
CSP
N: 300
MEAN: 23.5
50
SOT-23
N: 300
MEAN: 19
6.04
6.03
40
6.01
HITS
GAIN (dB)
6.02
6.00
30
5.99
20
5.98
5.97
10
–20
0
20
40
60
80
100
120
TEMPERATURE (°C)
0
10597-057
5.95
–40
0.01
0.02
0.03
0.04
0.05
OUTPUT OFFSET DRIFT (V)
Figure 17. Total Output Offset Voltage Drift (−40°C to +125°C)
Figure 14. DC Pass Band Gain Drift (−40°C to +125°C)
12
4.0
VENA
3.5
10
SUPPLY CURRENT (mA)
3.0
2.5
VOUT
2.0
1.5
1.0
0.5
0
+125°C
+25°C
8
–40°C
6
4
2
–1.0
–200
0
200
400
600
800
1000 1200 1400 1600 1800
TIME (ns)
Figure 15 Enable (ENA)/Disable Time
0
0
0.4
0.8
1.2
1.6
2
ENABLE VOLTAGE (V)
2.4
2.8
3.2
10597-052
–0.5
10597-044
VOLTAGE (V)
0
10597-056
5.96
Figure 18. Supply Current vs. Enable Voltage at Various Temperatures
Rev. A | Page 10 of 28
Data Sheet
ADA4432-1/ADA4433-1
13
4
12
STB OUTPUT
RESET POINT
OVER
VOLTAGE
PULSE
11
10
3
FLAG VOLTAGE (V)
VOLTAGE (V)
9
8
7
6
5
STB OUTPUT
4
VOUT
3
STB OUTPUT
TRIGGER POINT
2
1
2
1
200
400
600
800
1000
1200
1400
1600
TIME (ns)
0
10597-045
0
Figure 19. STB Output Flag Response Time
1
2
3
4
5
6
7
8
9 10 11 12 13 14 15 16 17 18
SHORT-TO-BATTERY (V)
Figure 22. STB Output Response vs. Short-to-Battery Voltage on Outputs
11
0
REFFERED TO OUTPUT
–10
10
SOT-23
–20
9
PSRR (dB)
8
LFCSP
–30
–40
7
–20
0
20
40
60
80
100
120
TEMPERATURE (°C)
–60
0.1
10597-046
6
–40
–50
10
100
FREQUENCY (MHz)
Figure 20. Supply Current vs. Temperature
3.3
1
10597-054
SUPPLY CURRENT (mA)
0
10597-053
0
–1
Figure 23. Power Supply Rejection Ratio (PSRR) vs. Frequency
–40
VIN = 1.0V p-p
–50
2.7
LFCSP
–60
GAIN (dB)
–70
1.5
0.9
–80
SOT-23
–90
–100
–110
0.3
–0.3
0
100
200
300
400
500
600
700
800
TIME (ns)
900
1000
Figure 21. Output Transient Response
–130
0.1
1
10
100
FREQUENCY (MHz)
Figure 24. Input-to-Output Off (Disabled) Isolation vs. Frequency
Rev. A | Page 11 of 28
10597-055
–120
10597-047
VOLTAGE (V)
2.1
ADA4432-1/ADA4433-1
Data Sheet
ADA4433-1 TYPICAL PERFORMANCE CHARACTERISTICS
TA = 25°C, +VS = 3.3 V, V−IN = 0.5 V, RL = 150 Ω, unless otherwise specified.
12
6.5
6
VOUT = 0.2V p-p
VOUT = 0.2V p-p
6.0
0
VOUT = 2.0V p-p
–6
5.5
VOUT = 2.0V p-p
–18
GAIN (dB)
GAIN (dB)
–12
–24
–30
5.0
4.5
–36
–42
4.0
–48
–54
3.5
1
10
100
FREQUENCY (MHz)
3.0
0.1
10597-007
–66
0.1
1
10
100
FREQUENCY (MHz)
Figure 25. Frequency Response at Various Output Amplitudes
10597-010
–60
Figure 28. 1 dB Flatness Response at Various Output Amplitudes
12
6.5
VOUT = 2.0V p-p
6
VOUT = 2.0V p-p
6.0
0
–6
5.5
–18
+125°C
GAIN (dB)
GAIN (dB)
–12
–40°C
–24
+25°C
–30
5.0
–40°C
4.5
+25°C
4.0
+125°C
–36
–42
–48
–54
3.5
1
10
100
FREQUENCY (MHz)
3.0
0.1
10597-008
Figure 26. Large Signal Frequency Response at Various Temperatures
7.0
100
Figure 29. 1 dB Flatness Response at Various Temperatures
RLOAD = 75Ω
90
6.5
80
6.0
5.5
GROUP DELAY (ns)
RLOAD = 100Ω
RLOAD = 150Ω
5.0
4.5
4.0
70
60
50
40
30
3.5
20
1
10
FREQUENCY (MHz)
10
0.1
10597-009
GAIN (dB)
10
FREQUENCY (MHz)
100
VOUT = 2.0V p-p
3.0
0.1
1
1
10
FREQUENCY (MHz)
Figure 27. 1 dB Flatness Response at Various Load Resistances
Figure 30. Group Delay vs. Frequency
Rev. A | Page 12 of 28
100
10597-012
–66
0.1
10597-011
–60
Data Sheet
ADA4432-1/ADA4433-1
1.5
1.5
f = 3.58MHz
f = 3.58MHz
0.5
0
–0.5
–1.5
0
1
2
3
4
5
6
7
8
9
10
11
10597-013
–1.0
1.0
0.5
0
–0.5
–1.0
–1.5
0
1
2
Figure 31. Differential Gain Plot
3
4
5
6
7
8
9
10
10597-016
DIFFERENTIAL PHASE (Degrees)
DIFFERENTIAL GAIN (%)
1.0
11
Figure 34. Differential Phase Plot
–25
N = 300
50
VOUT = 2.0V p-p
NUMBER OF DEVICES
OUTPUT BALANCE (dB)
–30
–35
–40
–45
–50
40
30
20
10
–55
6
FREQUENCY (MHz)
0
–0.04
18
4.0
VENA
3.5
SUPPLY CURRENT (mA)
3.0
+VOUT
2.5
2.0
1.5
1.0
–VOUT
0.5
16
+125°C
14
+25°C
–40°C
12
10
8
6
4
0
0
200
400
600
800
1000 1200 1400 1600 1800
TIME (ns)
Figure 33. Enable (ENA)/Disable Time
0
0
0.4
0.8
1.2
1.6
2.0
ENABLE VOLTAGE (V)
2.4
2.8
3.2
10597-018
2
–0.5
10597-015
VOLTAGE (V)
0.02
0.04
–0.02
0
OUTPUT COMMON-MODE OFFSET DRIFT (V)
Figure 35. Total Output Common-Mode Offset Voltage Drift
(−40°C to +125°C)
Figure 32. Output Balance Error vs. Frequency
–1.0
–200
10597-017
1
10597-014
–60
0.1
Figure 36. Supply Current vs. Enable Voltage at Various Temperatures
Rev. A | Page 13 of 28
ADA4432-1/ADA4433-1
Data Sheet
13
4
12
STB OUTPUT
RESET POINT
OVER
VOLTAGE
PULSE
11
10
3
FLAG VOLTAGE (V)
VOLTAGE (V)
9
8
7
6
5
STB
OUTPUT
4
+VOUT
3
STB OUTPUT
TRIGGER POINT
2
1
2
1
–VOUT
0
200
400
600
800
1000
1200
1400
1600
TIME (ns)
0
10597-019
–1
0
1
2
3
4
5
6
7
8
9 10 11 12 13 14 15 16 17 18
SHORT-TO-BATTERY (V)
10597-022
0
Figure 40. STB Output Response vs. Short-to-Battery Voltage on Outputs
Figure 37. STB Output Flag Response Time
0
16
REFERRED TO OUTPUT
–10
–20
14
PSRR (dB)
SUPPLY CURRENT (mA)
15
13
–30
–40
–50
–60
12
–20
0
20
40
60
80
100
120
TEMPERATURE (°C)
–80
0.1
10597-020
11
–40
1
10
100
FREQUENCY (MHz)
10597-023
–70
Figure 41. Power Supply Rejection Ratio (PSRR) vs. Frequency
Figure 38. Supply Current vs. Temperature
3.0
–50
VIN = 1.0V p-p
2.7
GAIN (dB)
2.1
1.8
1.5
–70
–80
1.2
–90
0.6
0
100
200
300
400
500
600
TIME (ns)
700
800
Figure 39. Output Transient Response
–100
0.1
1
10
100
FREQUENCY (MHz)
Figure 42. Input-to-Output Off (Disabled) Isolation vs. Frequency
Rev. A | Page 14 of 28
10597-024
0.9
10597-021
OUTPUT VOLTAGE (V)
–60
2.4
Data Sheet
ADA4432-1/ADA4433-1
THEORY OF OPERATION
The ADA4432-1 and ADA4433-1 with short-to-battery and
short-to-ground protection are designed as fifth-order, low-pass
filters with a fixed gain of 2 that is capable of driving 2 V p-p video
signals into doubly terminated video transmission lines on a single
supply as low as 2.6 V. The filter has a 1 dB flatness of 9 MHz
and provides a typical out-of-band rejection of 45 dB at 27 MHz.
The ADA4432-1 is a single-ended filter/driver that can be used
with both ac- and dc-coupled inputs and outputs, with an input
range that includes ground for use with a ground referenced
digital-to-analog converter (DAC) in a single-supply application.
To ensure accurate reproduction of ground referenced signals
without saturating the output devices, an internal offset is
added to shift the output voltage up by 200 mV.
The ADA4433-1 is a fully differential filter/driver that is also
designed for compliance with both ac- and dc-coupled inputs and
outputs. The ADA4433-1 can be driven by a differential or singleended source and provides a fully differential output signal that
is biased at a voltage equal to half the supply voltage (+VS/2). When
the device is used with a single-ended input source, bias the
inverting input, −IN, at the middle of the input voltage range
applied to the noninverting input, +IN, allowing each output
signal to swing equally around the midsupply point (see the
Configuring the ADA4433-1 for Single-Ended Input Signals
section). This is particularly important to maximize output
voltage headroom in low supply voltage applications.
SHORT CIRCUIT (SHORT-TO-GROUND) PROTECTION
Both the ADA4432-1 and ADA4433-1 include internal protection
circuits that limit the output sink or source current to 60 mA.
This short circuit protection prevents damage to the ADA4432-1
and ADA4433-1 when the output(s) are shorted to ground, to a
low impedance source, or together (in the case of the ADA4433-1)
for an extended time. In addition, in the case of the ADA4433-1,
the total sink or source current for both outputs is limited to
50 mA, which helps protect the device in the event of both outputs
being shorted to a low impedance. However, short circuit
protection does not affect the normal operation of the devices
because one output sources current, whereas the other output
sinks current when driving a differential output signal.
OVERVOLTAGE (SHORT-TO-BATTERY) PROTECTION
Both the ADA4432-1 and ADA4433-1 include internal protection
circuits to ensure that internal circuitry is not subjected to
extreme voltages or currents during an overvoltage event
applied to their outputs. A short-to-battery condition usually
consists of a voltage on the outputs that is significantly higher
than the power supply voltage of the amplifier. Duration can
vary from a short transient to a continuous fault.
The ADA4432-1 and ADA4433-1 can withstand voltages of up
to 18 V on the outputs. Critical internal nodes are protected from
exposure to high voltages by circuitry that isolates the output
devices from the high voltage and limits internal currents. This
protection is available whether the device is enabled or disabled,
even when the supply voltage is removed.
The output devices are disconnected when the voltage at the
output pins exceeds the supply voltage. After the overvoltage
condition is removed, internal circuitry pulls the output voltage
back within normal operating levels. The output devices are
reconnected when the voltage at the output pins falls below the
supply voltage by about 300 mV. When the devices are used with a
doubly terminated cable, the voltage sensed at the output pins is
lower than the voltage applied to the cable by the voltage drop
across the back termination resistor. The maximum voltage drop
across the back termination resistor is limited by the short-circuit
current protection; therefore, the threshold at which the overvoltage protection responds to a voltage applied to the cable is
VTHRESH (CABLE) = +VS + ILIMITRT
where:
VTHRESH (CABLE) is the voltage applied to the cable that activates the
internal isolation circuitry.
+VS is the positive supply voltage.
ILIMIT is the internal short-circuit current limit, typically 50 mA.
RT the back termination resistance.
If the voltage applied to the cable is lower than VTHRESH (CABLE), the
voltage seen at the output pins is lower than the supply voltage,
so no overvoltage condition is detected. However, the internal
circuitry is protected by the short circuit current limit; therefore,
the ADA4432-1/ADA4433-1 can withstand an indefinite duration
short to any positive voltage up to 18 V without damage.
SHORT-TO-BATTERY OUTPUT FLAG
In addition to the internal protection circuitry, the short-tobattery output flag (STB pin) indicates an overvoltage condition
on either or both output pins. The flag is present whenever the
internal overvoltage protection is active; therefore, it is available
when the device is enabled or disabled. It is not available, however,
when the supply voltage is removed, although the internal
protection is still active. The threshold at which the short-tobattery flag is activated and deactivated is the same as the
threshold for the protection circuitry.
Table 8. STB Pin Logic
STB Pin Output
High (Logic 1)
Low (Logic 0)
Rev. A | Page 15 of 28
Device State
Overvoltage fault condition
Normal operation
ADA4432-1/ADA4433-1
Data Sheet
ESD PROTECTION
Table 9. ENA Pin Function
All pins on the ADA4432-1 and ADA4433-1 are protected with
internal ESD protection structures connected to the power supply
pins (+VS and GND). These structures provide protection during
the handling and manufacturing process.
ENA Pin Input
High (Logic 1)
Low (Logic 0)
High-Z (Floating)
The outputs (OUT for the ADA4432-1 and +OUT and −OUT
for the ADA4433-1) can be exposed to dc voltages well above the
supply voltage in an overvoltage event; therefore, conventional
ESD structure protection cannot be used. Instead, the outputs
are protected by Analog Devices proprietary ESD devices, which
allow protection and recovery from an overvoltage event while
providing ESD protection well beyond the handling and
manufacturing requirements.
The outputs of the ADA4432-1 and ADA4433-1 are ESD
protected to survive ±8 kV and ±6 kV human body model
(HBM), respectively.
ENABLE/DISABLE MODES (ENA PIN)
Device State
Enabled
Disabled
Enabled
OPERATING SUPPLY VOLTAGE RANGE
The ADA4432-1 and ADA4433-1 are specified over an operating
supply voltage range of 2.6 V to 3.6 V. This range establishes the
nominal utilization voltage at which the devices perform in
conformance with their specifications. The operating supply
voltage refers to sustained voltage levels and not to a momentary
voltage excursion that can occur due to variation in the output of
the supply regulator. When the devices operate at the limits of the
operating supply voltage range (2.6 V to 3.6 V), excursions that are
outside of this range, but less than the absolute maximum, can
lead to some performance degradation; however, they do not
damage the device.
The power-down or enable/disable (ENA) pin is internally pulled
up to +VS through a 250 kΩ resistor. When the voltage on this
pin is high, the amplifier is enabled; pulling ENA low disables
the ADA4432-1 and ADA4433-1, reducing the supply current
to a very low 13.5 µA. With no external connection, this pin
floats high, enabling the amplifier.
Rev. A | Page 16 of 28
Data Sheet
ADA4432-1/ADA4433-1
APPLICATIONS INFORMATION
METHODS OF TRANSMISSION
Fully Differential Mode
Pseudo Differential Mode (Unbalanced Source
Termination)
The ADA4433-1 is designed to be used as a fully differential driver.
The differential outputs of the ADA4433-1 allow fully balanced
transmission using twisted or untwisted pair cable. In this
configuration, the differential output termination consists of two
source resistors, one on each output, and each equal to half the
receiver input termination. For example, in a 75 Ω system, each
output of the ADA4433-1 is back terminated with 37.5 Ω resistors
that are connected to a differential resistance of 75 Ω at the receiver.
An illustration of this arrangement is shown in Figure 45.
The positive conductor connects the ADA4432-1 output to the
positive input of a differential receiver, such as ADA4830-1. The
negative wire or ground conductor from the source circuitry
connects to the negative input of the receiver. Match the impedance
of the input termination at the receiver to the output termination
of the ADA4432-1 (see Figure 43).
DRIVER PCB
37.5Ω
ADA4433-1
+
−
NEGATIVE WIRE
INP
ADA4830-1
INN
Figure 45. Fully Differential Mode
ADA4830-1
INN
PRINTED CIRCUIT BOARD (PCB) LAYOUT
Figure 43. Pseudo Differential Mode
Pseudo Differential Mode (Balanced Source Impedance)
Pseudo differential signaling is typically implemented using
unbalanced source termination, as shown in Figure 43. With this
arrangement, however, common-mode signals on the positive
and negative inputs receive different attenuation due to unbalanced
termination at the source. This effectively converts some of the
common-mode signal into a differential mode signal, degrading
the overall common-mode rejection of the system. System
common-mode rejection can be improved by balancing the output
impedance of the driver, as shown in Figure 44. Splitting the source
termination resistance evenly between the hot and cold conductors
results in matched attenuation of the common-mode signals,
ensuring maximum rejection.
DRIVER PCB
POSITIVE WIRE
+
INP
75Ω
37.5Ω
−
NEGATIVE WIRE
INN
As with all high speed applications, attention to PCB layout is of
paramount importance. Adhere to standard high speed layout
practices when designing with the ADA4432-1 and ADA4433-1.
A solid ground plane is recommended. Place a 0.1 µF surfacemount, ceramic power supply decoupling capacitor as close as
possible to the supply pin.
Connect the GND pin(s) to the ground plane with a trace that is
as short as possible. Use controlled impedance traces of the shortest
length possible to connect to the signal I/O pins and do not run the
traces over any voids in the ground plane. A 75 Ω impedance level
is typically used in video applications. All signal outputs of the
ADA4432-1 and ADA4433-1 should include series termination
resistors when driving transmission lines.
When the ADA4432-1 or the ADA4433-1 receives its inputs from a
device with current outputs, the required load resistor value for
the output current is most often different from the characteristic
impedance of the signal traces. In this case, if the interconnections
are sufficiently short (less than 2 inches), the trace does not
need to be terminated in its characteristic impedance.
ADA4830-1
10597-026
37.5Ω
37.5Ω
POSITIVE WIRE
75Ω
ADA4432-1
INP
75Ω
NEGATIVE WIRE
10597-025
75Ω
+
−
DRIVER PCB
ADA4432-1
POSITIVE WIRE
10597-027
The ADA4432-1 can be used as a pseudo differential driver
with an unbalanced transmission line. Pseudo differential mode
uses a single conductor to carry an unbalanced data signal from
the driver to the receiver, while a second conductor is used as a
ground reference signal.
Figure 44. Pseudo Differential Mode with Balanced Source Impedance
Rev. A | Page 17 of 28
ADA4432-1/ADA4433-1
Data Sheet
CONFIGURING THE ADA4433-1 FOR SINGLEENDED INPUT SIGNALS
The ADA4433-1 is a fully differential filter/driver that can be
used as a single-ended-to-differential amplifier or as a differentialto-differential amplifier. In single-ended-to-differential output
applications, bias the −IN input appropriately to optimize the
output range. To make the most efficient use of the output range
of the ADA4433-1, especially with low supply voltages, it is
important to allow the differential output voltage to swing in
both a positive and negative direction around the output commonmode voltage (VOCM) level, the midsupply point. To do this, the
differential input voltage must swing both positive and negative.
Figure 46 shows a 1 V p-p single-ended signal on +IN with −IN
grounded. This produces a differential input voltage that ranges
from 0 V to 1 V. The resulting differential output voltage is
INPUT SIGNAL
strictly positive, where each output swings only above V+OUT or
below V−OUT, the midsupply VOCM level. Directly at the output of the
ADA4433-1, the output voltage extends from 0.65 V to 2.65 V,
requiring a full 2 V of output to produce a 1 V p-p signal at the
receiver (represented by the voltage across 2R).
To make a more efficient use of the output range, the −IN input is
biased at the midpoint of the expected input signal range, as shown
in Figure 47. A 1 V p-p single-ended signal on +IN, with −IN
biased at 0.5 V, produces a differential input voltage that ranges
from −0.5 V to +0.5 V. The resulting differential output voltage
now contains both positive and negative components, where
each output swings both above and below the midsupply VOCM
level. Directly at the output of the ADA4433-1, the output
voltage now extends only from 1.15 V to 2.15 V, requiring only
1 V of the output to produce a 1 V p-p signal at the receiver.
DIFFERENTIAL OUTPUT SIGNAL
DIFFERENTIAL OUTPUT SIGNAL ACROSS 2R
2.65V
V+IN
1V p-p
V+OUT
ADA4433-1
1.0V
1V p-p
R
+
2R VOUT
–
VOCM =
1.65V
R
0V
V–IN
V–OUT
VDIFF (OUT) = V+OUT – V–OUT
10597-028
0.65V
VDIFF (IN) = V+IN – V–IN
VOUT = VDIFF (OUT) ÷ 2
Figure 46. Single-Ended-to-Differential Configuration with Negative Input (−IN) Connected to Ground
INPUT SIGNAL
DIFFERENTIAL OUTPUT SIGNAL
DIFFERENTIAL OUTPUT SIGNAL ACROSS 2R
V+OUT
ADA4433-1
V–IN
1V p-p
0.5V
2.15V
VOCM =
1.65V
2R
1.15V
0V
V+IN
VDIFF (IN) = V+IN – V–IN
R
+
VOUT
–
1V p-p
R
V–OUT
VDIFF (OUT) = V+OUT – V–OUT
VOUT = VDIFF (OUT) ÷ 2
Figure 47. Single-Ended-to-Differential Configuration with Negative Input (−IN) Connected to 0.5 V
Rev. A | Page 18 of 28
10597-029
1.0V
Data Sheet
ADA4432-1/ADA4433-1
PIN-COMPATIBLE ADA4432-1 AND ADA4433-1
Example Configuration for Package-Compatible PCB
The ADA4432-1 and ADA4433-1 are single-ended output and
differential output, respectively, short-to-battery protected video
filters for automotive applications. Each version shares a common
package, the 8-lead LFSCP, which allows them to share a common
pinout and footprint. This allows a designer to change from a
single-ended output configuration to a differential output on
the same PCB with only minimal change to the external resistor
values and placements. Figure 48 and Figure 50 show the pin
configuration of the ADA4432-1 and ADA4433-1 in 8-lead
LFCSP packages. Figure 49 and Figure 51 show an example
schematic configured for the ADA4432-1 and the ADA4433-1,
respectively.
The single-ended output with the ADA4432-1 includes the following:
•
•
•
•
•
R1 matches the requirement for the source.
R2, R3, and R6 are not installed.
C3 is not installed.
R5 is chosen to match the receiver termination impedance.
R8 is 0 Ω to provide ground reference.
The differential output with the ADA4433-1 includes the following:
•
•
•
•
R1 matches the requirement for the source.
R2 and R3 are chosen to provide the correct bias for −IN.
C3 is for the −IN bypass.
R5 and R6 are chosen to match the receiver termination
impedance.
R8 is not installed.
•
ADA4433-1
NC 1
–IN 1
8 IN
STB 2
TOP VIEW
(Not to
Scale)
+VS 3
7 ENA
STB 2
6 GND
+VS 3
5 NC
NOTES
1. NC = NO CONNECT.
2. THE EXPOSED PAD MAY BE CONNECTED
TO THE GROUND PLANE.
ENA
8
IN
7
6
R8
0Ω
5
ENA GND
NC
Figure 50. 8-Lead LFCSP Package Pin Configuration, ADA4433-1
GROUND
REFERENCE
CONDUCTOR
R6
37.5Ω
VIDEO
INPUT
R1
75Ω
8
+IN
ADA4432-1
5
R8
DNI
+VS
NC
STB
+VS
OUT
1
2
3
4
R5
75Ω
POSITIVE
OUTPUT
CONDUCTOR
R2
DNI
STB
C1
2.2µF
R3
7.5kΩ
C2
0.1µF
+VS
10597-033
C3
DNI
6
ADA4433-1
+VS
R3
DNI
7
ENA GND –OUT
NEGATIVE
OUTPUT
CONDUCTOR
Figure 49. Example Compatible Schematic Configured for the ADA4432-1
C3
0.1µF
–IN
STB
1
2
R2
1.33kΩ
STB
+VS +OUT
3
4
C1
2.2µF
R5
37.5Ω
C2
0.1µF
POSITIVE
OUTPUT
CONDUCTOR
+VS
10597-032
R1
75Ω
6 GND
5 –OUT
ENA
R6
DNI
7 ENA
NOTES
1. THE EXPOSED PAD MAY BE CONNECTED
TO THE GROUND PLANE.
Figure 48. 8-Lead LFCSP Package Pin Configuration, ADA4432-1
VIDEO
INPUT
TOP VIEW
(Not to
Scale)
+OUT 4
10597-031
OUT 4
8 +IN
10597-030
ADA4432-1
Figure 51. Example Compatible Schematic Configured for the ADA4433-1
Rev. A | Page 19 of 28
ADA4432-1/ADA4433-1
Data Sheet
TYPICAL APPLICATION CIRCUITS
VDD_IO
33µF
10µF
0.1µF
100nF
GND_IO
GND_IO
GND_IO
GND_IO
33µF
10µF
0.1µF
100nF
PGND
PGND
PGND
PGND
33µF
10µF
0.1µF
100nF
1µF
AGND
AGND
AGND
AGND
AGND
33µF
10µF
0.1µF
100nF
DGND
DGND
DGND
DGND
PVDD
VAA
PIXEL PORT
INPUTS
PIXEL PORT
INPUTS
CONTROL
INPUTS/OUTPUTS
P0
P1
P2
P3
P4
P5
P6
P7
VDD
VDD
VAA
PVDD
VDD_IO
VDD
ENABLE
(INPUT)
COMP
2.2µF
RSET
4.12kΩ
ADV7391/
ADV7393
P8
P9
P10
P11 (ADV7393 ONLY)
P12
P13
P14
P15
STB FLAG
(OUTPUT)
VAA
2.2nF
ENA
0.1µF
AGND
+VS
AGND
STB
AGND
IN
DAC1
STB
300Ω
DAC2
AGND
DAC3
VOUT 75Ω
75Ω
TWISTED
PAIR
SOT-23 PACKAGE
ADA4432-1
GND
HSYNC
VSYNC
AGND
CLOCK INPUT
I2C PORT
CLKIN
SDA
ALSB
SCL
DGND
RESET
PVDD
EXT_LF
12nF
AGND PGND DGND DGND GND_IO
150nF 170Ω
AGND PGND DGND DGND GND_IO
10597-035
EXTERNAL LOOP
FILTER
(OPTIONAL)
Figure 52. ADA4432-1 and ADV7391/ADV7393 Video Encoder Application Circuit
Rev. A | Page 20 of 28
Data Sheet
ADA4432-1/ADA4433-1
VDD_IO
33µF
10µF
0.1µF
100nF
GND_IO
GND_IO
GND_IO
GND_IO
33µF
10µF
0.1µF
100nF
PGND
PGND
PGND
PGND
33µF
10µF
0.1µF
100nF
1µF
AGND
AGND
AGND
AGND
AGND
33µF
10µF
0.1µF
100nF
DGND
DGND
DGND
DGND
PVDD
VAA
PIXEL PORT
INPUTS
PIXEL PORT
INPUTS
CONTROL
INPUTS/OUTPUTS
CLOCK INPUT
I2C PORT
VDD_IO
P0
P1
P2
P3
P4
P5
P6
P7
VDD
VDD
VAA
PVDD
VDD
2.2µF
RSET
4.12kΩ
ADV7391/
ADV7393
P8
P9
P10
P11 (ADV7393 ONLY)
P12
P13
P14
P15
ENA
AGND
0.1µF
AGND
AGND
2.2nF
+VS
STB
+IN
DAC 1
VAA
300Ω
DAC 2
STB
7.5kΩ
AGND
STB
DAC 3
–OUT 37.5Ω
+OUT 37.5Ω
75Ω
TWISTED
PAIR
–IN
HSYNC
0.1µF
VSYNC
CLKIN
SDA
STB FLAG
(OUTPUT)
VAA
COMP
1.33kΩ
ADA4433-1
AGND
GND
ALSB
AGND
SCL
DGND
RESET
PVDD
ENABLE
(INPUT)
EXT_LF
12nF
AGND PGND DGND DGND GND_IO
150nF 170Ω
AGND PGND DGND DGND GND_IO
10597-034
EXTERNAL LOOP
FILTER
(OPTIONAL)
Figure 53. ADA4433-1 and ADV7391/ADV7393 Video Encoder Application Circuit
Rev. A | Page 21 of 28
ADA4432-1/ADA4433-1
Data Sheet
FULLY DC-COUPLED TRANSMISSION LINE
levels at the transmitter and receiver is within the common-mode
range of the receiver, very little current flow results, and no image
degradation is anticipated.
The ADA4432-1and ADA4433-1 are designed to be used with
high common-mode rejection, high input impedance receivers
such as the ADA4830-1, ADA4830-2, or other generic receivers.
Figure 54 and Figure 55 show an example configuration of a
completely dc-coupled transmission using the ADA4432-1 and
the ADA4433-1 along with a high input impedance differential
receiver.
The very low output impedance of the ADA4432-1 and the
ADA4433-1 allow them to be used in fully dc-coupled transmission
line applications in which there may be a significant discrepancy
between voltage levels at the ground pins of the driver and
receiver. As long as the voltage difference between reference
ENABLE
(INPUT)
4.99kΩ
+VS
(3.3V)
2.2µF
STB FLAG
(OUTPUT)
+
0.1µF
ENA
2.2µF
0.1µF
ENA
FROM
IMAGER
OR VIDEO
ENCODER IN
+VS
STB FLAG
(OUTPUT)
+VS
(5.0V)
ENABLE
(INPUT)
+VS
STB
+VS
VREF
STB
OUT 75Ω
STB
−
75Ω
TWISTED
PAIR
4.7µF
INP
+
VOUT
TO VIDEO
DECODER
75Ω
RT
0.1µF
−
+
ADA4432-1
INN
LFCSP PACKAGE
ADA4830-1
GND
10597-037
GND
Figure 54. ADA4432-1 Video Filter and the ADA4830-1 Difference Amplifier in a DC-Coupled Configuration
+VS
(3.3V)
ENABLE
(INPUT)
STB FLAG
(OUTPUT)
2.2µF
2.2µF
+
4.99kΩ
+
ENA
0.1µF
STB FLAG
(OUTPUT)
+VS
(5.0V)
ENABLE
(INPUT)
0.1µF
+VS
STB
+VS
ENA
FROM
IMAGER
OR VIDEO
ENCODER
+VS
STB
ADA4433-1
VREF
+IN
RT
LPF
–OUT 37.5Ω
−
75Ω
TWISTED
PAIR
4.7µF
+
TO
VIDEO
DECODER
VOUT
INP
75Ω
37.5Ω
0.1µF
+
−
1.33kΩ
INN
ADA4830-1
LPF
7.5kΩ
0.1µF
+OUT
–IN
GND
GND
Figure 55. ADA4433-1 Video Filter and ADA4830-1 Difference Amplifier in a DC-Coupled Configuration
Rev. A | Page 22 of 28
10597-036
+VS
Data Sheet
ADA4432-1/ADA4433-1
Rev. A | Page 23 of 28
3.3V
75Ω CABLE
ADV7391
RSET
75Ω
510Ω
75Ω
Figure 56. Driving a Video Transmission Line Directly with a DAC
3.3V
3.3V
ADV7391
ADA4432-1
75Ω
75Ω CABLE
RSET
4.12kΩ
300Ω
75Ω
Figure 57. Driving a Video Transmission Line with the ADA4432-1
10597-039
Using a series source termination and a shunt load termination on
a low supply voltage with the ADA4432-1 or ADA4433-1 realizes
significant power savings compared with driving a video cable
directly from a DAC output. Figure 56 shows a video DAC
driving a cable directly. Properly terminated, a DAC driven
transmission line requires two 75 Ω loads in parallel, demanding
in excess of 33 mA to reach a full-scale voltage level of 1.3 V.
Figure 57 shows the same video load being driven using the
ADA4432-1 and a series-shunt termination. This requires two
times the output voltage to drive the equivalent of 150 Ω but
only requires a little more than 15 mA to reach a full-scale output.
When running on the same supply voltage as the DAC, this result
in a 74% reduction in power consumption compared with the
circuit in Figure 56. The high order filtering provided by the
ADA4432-1 lowers the requirements on the DAC oversampling
ratio, realizing further power savings. The main source for power
savings realized by the configuration shown in Figure 57 comes
from the low drive mode setting for the ADV7391. This along
with the reduction in the requirement for oversampling (PLL
turned off), and the reduced load current required, results in
significant power savings.
For more detailed information on low drive mode, see the
ADV7391 data sheet.
10597-038
LOW POWER CONSIDERATIONS
ADA4432-1/ADA4433-1
Data Sheet
OUTLINE DIMENSIONS
2.44
2.34
2.24
3.10
3.00 SQ
2.90
0.50 BSC
8
5
PIN 1 INDEX
AREA
0.50
0.40
0.30
1
4
PIN 1
INDICATOR
(R 0.15)
BOTTOM VIEW
0.80
0.75
0.70
0.05 MAX
0.02 NOM
COPLANARITY
0.08
0.203 REF
0.30
0.25
0.20
FOR PROPER CONNECTION OF
THE EXPOSED PAD, REFER TO
THE PIN CONFIGURATION AND
FUNCTION DESCRIPTIONS
SECTION OF THIS DATA SHEET.
01-24-2011-B
TOP VIEW
SEATING
PLANE
1.70
1.60
1.50
EXPOSED
PAD
COMPLIANT TO JEDEC STANDARDS MO-229-WEED
Figure 58. 8-Lead Lead Frame Chip Scale Package [LFCSP_WD]
3 mm × 3 mm Body, Very Very Thin, Dual Lead
(CP-8-11)
Dimensions shown in millimeters
3.00
2.90
2.80
1.70
1.60
1.50
6
5
4
1
2
3
3.00
2.80
2.60
PIN 1
INDICATOR
0.95 BSC
1.90
BSC
1.45 MAX
0.95 MIN
0.15 MAX
0.05 MIN
0.50 MAX
0.30 MIN
0.20 MAX
0.08 MIN
SEATING
PLANE
10°
4°
0°
0.60
BSC
COMPLIANT TO JEDEC STANDARDS MO-178-AB
Figure 59. 6-Lead Small Outline Transistor Package [SOT-23]
(RJ-6)
Dimensions shown in millimeters
Rev. A | Page 24 of 28
0.55
0.45
0.35
12-16-2008-A
1.30
1.15
0.90
Data Sheet
ADA4432-1/ADA4433-1
ORDERING GUIDE
Model 1, 2
ADA4432-1BRJZ-R2
ADA4432-1BRJZ-R7
ADA4432-1WBRJZ-R7
ADA4432-1BRJ-EBZ
ADA4432-1BCPZ-R2
ADA4432-1BCPZ-R7
ADA4432-1WBCPZ-R7
ADA4432-1BCP-EBZ
ADA4433-1BCPZ-R2
ADA4433-1BCPZ-R7
ADA4433-1WBCPZ-R7
ADA4433-1BCP-EBZ
1
2
Temperature
Range
−40°C to +125°C
−40°C to +125°C
−40°C to +125°C
−40°C to +125°C
−40°C to +125°C
−40°C to +125°C
−40°C to +125°C
−40°C to +125°C
−40°C to +125°C
Package Description
6-Lead Small Outline Transistor Package [SOT-23]
6-Lead Small Outline Transistor Package [SOT-23]
6-Lead Small Outline Transistor Package [SOT-23]
SOT-23 Evaluation Board
8-Lead Lead Frame Chip Scale Package [LFCSP_WD]
8-Lead Lead Frame Chip Scale Package [LFCSP_WD]
8-Lead Lead Frame Chip Scale Package [LFCSP_WD]
LFCSP_WD Evaluation Board
8-Lead Lead Frame Chip Scale Package [LFCSP_WD]
8-Lead Lead Frame Chip Scale Package [LFCSP_WD]
8-Lead Lead Frame Chip Scale Package [LFCSP_WD]
Evaluation Board
Package
Option
Branding
Ordering
Quantity
RJ-6
RJ-6
RJ-6
322
322
323
250
3000
3000
CP-8-11
CP-8-11
CP-8-11
321
321
H33
250
1500
1500
CP-8-11
CP-8-11
CP-8-11
331
331
H2Z
250
1500
1500
Z = RoHS Compliant Part.
W = Qualified for Automotive Applications.
AUTOMOTIVE PRODUCTS
The ADA4432-1W and ADA4433-1W models are available with controlled manufacturing to support the quality and reliability
requirements of automotive applications. Note that these automotive models may have specifications that differ from the commercial
models; therefore, designers should review the Specifications section of this data sheet carefully. Only the automotive grade products
shown are available for use in automotive applications. Contact your local Analog Devices account representative for specific product
ordering information and to obtain the specific Automotive Reliability reports for these models.
Rev. A | Page 25 of 28
ADA4432-1/ADA4433-1
Data Sheet
NOTES
Rev. A | Page 26 of 28
Data Sheet
ADA4432-1/ADA4433-1
NOTES
Rev. A | Page 27 of 28
ADA4432-1/ADA4433-1
Data Sheet
NOTES
©2012 Analog Devices, Inc. All rights reserved. Trademarks and
registered trademarks are the property of their respective owners.
D10597-0-5/12(A)
Rev. A | Page 28 of 28