LT1722/LT1723/LT1724
1
172234fb
TYPICAL APPLICATION
FEATURES DESCRIPTION
Single, Dual, Quad 200MHz
Low Noise Precision Op Amps
The LT
®
1722/LT1723/LT1724 are single/dual/quad, low
noise, low power, high speed operational amplifi ers. These
products feature lower input offset voltage, lower input bias
current and higher DC gain than devices with comparable
bandwidth. The 200MHz gain bandwidth ensures high
open-loop gain at video frequencies.
The low input noise voltage is achieved with reduced
supply current. The total noise is optimized for a source
resistance between 0.8k and 12k. Due to the input bias
current cancellation technique used, the resistance seen
by each input does not need to be balanced.
The output drives a 150 load to ±3V with ±5V supplies.
On a single 5V supply the output swings from 1.5V to
3.5V with a 500 load connected to 2.5V. The amplifi er
is unity-gain stable (C
LOAD
≤ 100pF).
The LT1722/LT1723/LT1724 are manufactured on Linear
Technology’s advanced low voltage complementary
bipolar process. The LT1722 is available in the SO-8 and
5-pin SOT-23 packages. The LT1723 is available in the
SO-8 and MS8 packages. The LT1724 is available in the
14-lead SO package.
Differential Video Line Driver
APPLICATIONS
n
3.8nV/√Hz Input Noise Voltage
n
3.7mA Supply Current
n
200MHz Gain Bandwidth
n
Low Total Harmonic Distortion: –85dBc at 1MHz
n
70V/µs Slew Rate
n
400µV Maximum Input Offset Voltage
n
300nA Maximum Input Bias Current
n
Unity-Gain Stable
n
Capacitive Load Stable Up to 100pF
n
23mA Minimum Output Current
n
Specifi ed at ±5V and Single 5V
n
Low Profi le (1mm) SOT-23 (ThinSot
™
) Package
n
Video and RF Amplifi cation
n
ADSL, HDSL II, VDSL Receivers
n
Active Filters
n
Wideband Amplifi ers
n
Buffers
n
Data Acquisition Systems
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear
Technology Corporation. ThinSOT is a trademark of Linear Technology Corporation. All other
trademarks are the property of their respective owners.
Line Driver Mulitburst Video Signal
–
+
1/2 LT1723
R5 2k
R3
750
R7
62.5
+V
OUT
V
IN
/2
62.5
LOAD
62.5
LOAD
–V
IN
/2
–V
IN
1723 TA01
V
IN
–V
OUT
125
CAT-5
TWISTED PAIR
C1 5pF
–
+
1/2 LT1723
R4 2k
V
IN
75
SOURCE
R2
2k
R1
75
R6
62.5
C2 5pF
+V
OUT
0.5V/DIV
–V
OUT
0.5V/DIV
V
IN
1V/DIV
1723 TA02