IA171 Datasheet PDF - ETC

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IA171
ETC

Part Number IA171
Description Low voltage video driver
Page 8 Pages


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Intelligent Analog IA171
Low voltage video driver
Features
Low voltage operation 2.8V~5.5V
Low stand-by current (<1uA) at power save
Transparent internal clamp
AC or DC-coupled output
Built-in high performance 4 stages Low Pass Filter (-40dB at 27MHz)
Dual video load drive (75 ohm x 2)
SAG correction reduce output capacitance
RoHS compliant Pb-free SOT-26 package
Applications
DVD player
Security camera
Set-top box
Portable media player
Communication device
Digital still camera
Block Diagram
VCC
6
VIN 4
L.P.F.
CLAMP
+
-
2 VOUT
3 SAG
15
PS GND



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Description
IA171 is a high performance, low voltage, and low power consumption video
driver with a built-in low pass filter. The internal transparent clamp circuit can restore
composite video signal to fixed DC level. IA 171 incorporates a high performance 4
stages Low Pass Filter that is ideal for removing DAC sampling noise. Only small
ceramic capacitor (0.1uF typical) is required for AC-coupled input. The output can be
configured as AC or DC-coupled output. With AC-coupled, sag correction can reduce
output coupling capacitance. With DC-coupled, it can eliminate large output coupling
capacitors and save board space. It’s low voltage and low power consumption is
suitable for portable device. Ultra-low current consumption during power save to
under 1uA. IA 171 can also be configured as bias inputs video driver when bias video
signals are needed.
Absolute Maximum Rating
Supply Voltage
Continuous Output Current (One Channel)
Power Dissipation
Operating Temperature
Storage Temperature
10V
45mA
200mW
-40~+85
-65~+125
Electrical Specifications VCC=+3.0V, Ta=25, RL=150 ohm, CL=0.1uF
DESCRIPTION
PARAMETER
ISB Standby Current at VCC=+3.0V
VOL Output Level Shift Voltage
VCLAMP
Input Clamp Voltage
GV Voltage Gain
IPS Power Save Current
VPSH
Power Save High voltage
VPSL
Power Save Low voltage
AC PERFORMANCE
BW1
+/- 1dB Bandwidth, RL=150 ohm,
CL=5pF
BW2
Frequency Response at 27MHz
dG Differential Gain
dP Differential Phase
MIN TYP MAX UNIT
6 10 mA
300 450 mV
1.1 1.25 1.40 V
5.7 6.0 6.3 dB
0.1 1 uA
2.0 V
0.5 V
6.75 MHZ
-40 -27 dB
0.5 1.0
0.5 1.0
°



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dG DC
dP DC
+SR
-SR
SNR
DR
Td1
Td2
Differential Gain DC-coupled
Differential Phase DC-coupled
Positive Slew Rate, V in =1V step
Negative Slew Rate, V in =1V step
Signal to Noise Ratio
Output Dynamic Range
Group Delay at 100KHz
To 3.58MHz
To 4.43MHz
To 6MHz
20
15
2.2
0.2 0.5
0.2 0.5
40 60
30 45
+70
2.4
50 80
4 10
6 10
12 18
°
V/uS
V/uS
dB
V
nS
nS
nS
nS
Pin Description
Pin No.
1
2
3
4
5
6
Pin Type
Input
Output
Input
Input
-
-
Pin Function
Power save input
Video output
Sag correction input
Video signal input
GND
VCC
Power Save Control Pin Function
H
L
OPEN
Power Save
OFF
ON
ON
Typical Applications
Application 1: Composite video input at VCC=2.8V~5.5V, with input and output
capacitors and driving two 75 ohm loads



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VCC
VIDEO IN
75
47uF
0.1uF
0.1uF
654
IA171
VCC
123
100uF
75
22uF
75
VIDEO OUT1
VIDEO OUT2
Application 2: Composite video input at VCC=2.8V~5.5V, with input and output
capacitors and driving one 75 ohm load
VC C
VIDEO IN
75
47uF
0.1uF
0.1uF
654
IA171
VCC
123
47uF
22uF
75
VIDEO OUT
Application 3: With input capacitor but without output capacitors at VCC=
2.8V~3.3V and driving one 75 ohm load



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IA171 Low voltage video driver IA171
ETC
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