LT1497 Datasheet, PDF (1/12 Pages) Linear Technology – Dual 125mA, 50MHz Current Feedback Amplifier

LT1497
Dual 125mA, 50MHz
Current Feedback Amplifier
FEATURES
s _{Minimum Output Current: ±125mA}
s _{Maximum Supply Current per Amp: 7mA, VS = ±5V}
s _{Bandwidth: 50MHz, VS = ±15V}
s _{Slew Rate: 900V/µs, VS = ±15V}
s _{Wide Supply Range: VS = ±2.5V to ±15V}
(Enhanced θ_JA 16-Pin SO Package)
s _{Enhanced θJA SO-8 Package for ±5V Operation}
s _{0.02% Differential Gain: AV = 2, RL = 150Ω}
s _{0.015° Differential Phase: AV = 2, RL = 150Ω}
s _{±13V Output Swing: IL = 100mA, VS = ±15V}
s _{±3.1V Output Swing: IL = 100mA, VS = ±5V}
s _{55ns Settling Time to 0.1%, 10V Step}
s _{Thermal Shutdown Protection}
U
APPLICATIONS
s _{Twisted-Pair Drivers}
s _{Video Amplifiers}
s _{Cable Drivers}
s _{Test Equipment Amplifiers}
s _Buffers
DESCRIPTION
The LT^®1497 dual current feedback amplifier features low
power, high output drive, excellent video characteristics
and outstanding distortion performance. From a low 7mA
maximum supply current per amplifier, the LT1497 drives
±100mA with only 1.9V of headroom. Twisted pairs can be
driven differentially with – 70dBc distortion up to 1MHz for
±40mA peak signals.
The LT1497 is available in a low thermal resistance 16-pin
SO package for operation with supplies up to ±15V. For
±5V operation the device is also available in a low thermal
resistance SO-8 package. The device has thermal and
current limit circuits that protect against fault conditions.
The LT1497 is manufactured on Linear Technology’s
complementary bipolar process. The device has charac-
teristics that bridge the performance between the LT1229
and LT1207 dual current feedback amplifiers. The LT1229
has 30mA output drive, 100MHz bandwidth and 12mA
supply current. The LT1207 has 250mA output drive,
60MHz bandwidth and 40mA supply current.
, LTC and LT are registered trademarks of Linear Technology Corporation.
TYPICAL APPLICATION
HDSL2 Single Pair Line Driver
560Ω
560Ω
–
1/2 LT1497
+
V_IN
560Ω
560Ω
–
1/2 LT1497
+
68.1Ω
1:1*
68.1Ω ^{*MIDCOM 671-7807}
135Ω
1419 TA01
2nd and 3rd Harmonic Distortion of
HDSL2 Single Pair Line Driver
– 40
V_S = ± 5V
V_IN = ±1.25V
– 50 ^{VOUT = ± 2.5V}
– 60
– 70 _2ND
3RD
– 80
– 90
100k
1M
2M
FREQUENCY (Hz)
1497 TA02
1