LT1818/LT1819
400MHz, 2500V/碌s, 9mA
Single/Dual Operational Amplifiers
FEATURES
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DESCRIPTIO
400MHz Gain Bandwidth Product
2500V/
碌
s Slew Rate
鈥?5dBc Distortion at 5MHz
9mA Supply Current Per Amplifier
Space Saving SOT-23 and MS8 Packages
6nV/鈭欻z Input Noise Voltage
Unity-Gain Stable
1.5mV Maximum Input Offset Voltage
8碌A Maximum Input Bias Current
800nA Maximum Input Offset Current
40mA Minimum Output Current, V
OUT
=
鹵3V
鹵3.5V
Minimum Input CMR, V
S
=
鹵5V
Specified at
鹵5V,
Single 5V Supplies
Operating Temperature Range: 鈥?40擄C to 85擄C
The LT
廬
1818/LT1819 are single/dual wide bandwidth,
high slew rate, low noise and distortion operational ampli-
fiers with excellent DC performance. The LT1818/LT1819
have been designed for wider bandwidth and slew rate,
much lower input offset voltage and lower noise and
distortion than devices with comparable supply current.
The circuit topology is a voltage feedback amplifier with
the excellent slewing characteristics of a current feedback
amplifier.
The output drives a 100鈩?load to
鹵3.8V
with
鹵5V
supplies.
On a single 5V supply, the output swings from 1V to 4V
with a 100鈩?load connected to 2.5V. The amplifier is unity-
gain stable with a 20pF capacitive load without the need for
a series resistor. Harmonic distortion is 鈥?5dBc up to
5MHz for a 2V
P-P
output at a gain of 2.
The LT1818/LT1819 are manufactured on Linear
Technology鈥檚 advanced low voltage complementary bipo-
lar process. The LT1818 (single op amp) is available in
SOT-23 and SO-8 packages; the LT1819 (dual op amp) is
available in MSOP-8 and SO-8 packages.
, LTC and LT are registered trademarks of Linear Technology Corporation.
APPLICATIO S
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Wideband Amplifiers
Buffers
Active Filters
Video and RF Amplification
Communication Receivers
Cable Drivers
Data Acquisition Systems
TYPICAL APPLICATIO
FFT of Single Supply ADC Driver
Single Supply Unity-Gain ADC Driver for Oversampling Applications
5V
2.5VDC
鹵1VAC
5V
0
鈥?0
鈥?0
鈥?0
51.1鈩?/div>
LT1818
18pF
AMPLITUDE (dBc)
+
鈥?/div>
A
IN+
2.5V
A
IN鈥?/div>
LTC1744
14 BITS
50Msps
(SET FOR 2V
P-P
FULL SCALE)
鈥?0
鈥?0
鈥?0
鈥?0
鈥?0
鈥?0
2
18189 TA01
鈥?00
鈥?10
0
5M
10M
15M
20M
FREQUENCY (Hz)
25M
18189 TA02
U
f
IN
= 5.102539MHz
f
S
= 50Msps
V
IN
= 300mV
P-P
SFDR = 78dB
8192 POINT FFT
NO WINDOWING
OR AVERAGING
3
18189f
U
U
1
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