IA IA171 Schematics

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

4

VIN

L.P.F.

CLAMP

VCC

+

-

6

2

VOUT

3

SAG

1

PS

5

GND

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 10V
Continuous Output Current (One Channel) 45mA
Power Dissipation 200mW
Operating Temperature
Storage Temperature

Electrical Specifications

DESCRIPTION

ISB Standby Current at VCC=+3.0V 6 10 mA
VOL Output Level Shift Voltage 300 450 mV
V

CLAMP

GV Voltage Gain 5.7 6.0 6.3 dB
IPS Power Save Current 0.1 1 uA
V

PSH

V

PSL

AC PERFORMANCE

Input Clamp Voltage 1.1 1.25 1.40 V

Power Save High voltage 2.0 V

Power Save Low voltage 0.5 V

VCC=+3.0V, Ta=25℃, RL=150 ohm, CL=0.1uF

PARAMETER MIN TYP MAX UNIT

-40℃~+85℃

-65℃~+125℃

BW1 +/- 1dB Bandwidth, RL=150 ohm,

CL=5pF
BW2 Frequency Response at 27MHz -40 -27 dB
dG Differential Gain 0.5 1.0
dP Differential Phase 0.5 1.0

6.75 MHZ

％

°

dG DC Differential Gain DC-coupled 0.2 0.5

％
dP DC Differential Phase DC-coupled 0.2 0.5
+SR Positive Slew Rate, V in =1V step 20 40 60 V/uS

-SR Negative Slew Rate, V in =1V step 15 30 45 V/uS
SNR Signal to Noise Ratio +70 dB
DR Output Dynamic Range 2.2 2.4 V
Td1 Group Delay at 100KHz 50 80 nS
Td2

To 3.58MHz 4 10 nS
To 4.43MHz 6 10 nS
To 6MHz 12 18 nS

°

Pin Description

Pin No. Pin Type Pin Function

1 Input Power save input
2 Output Video output
3 Input Sag correction input
4 Input Video signal input
5 - GND
6 - VCC

Power Save Control Pin Function

Power Save
H OFF
L ON
OPEN 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