LT1818 Datasheet, PDF (1/16 Pages) Linear Technology – Single/Dual Operational Amplifiers

LT1818/LT1819
400MHz, 2500V/µs, 9mA
Single/Dual Operational Amplifiers
FEATURES
s _{400MHz Gain Bandwidth Product}
s _{2500V/µs Slew Rate}
s _{–85dBc Distortion at 5MHz}
s _{9mA Supply Current Per Amplifier}
s _{Space Saving SOT-23 and MS8 Packages}
s _{6nV/√Hz Input Noise Voltage}
s _{Unity-Gain Stable}
s _{1.5mV Maximum Input Offset Voltage}
s _{8µA Maximum Input Bias Current}
s _{800nA Maximum Input Offset Current}
s _{40mA Minimum Output Current, VOUT = ±3V}
s _{±3.5V Minimum Input CMR, VS = ±5V}
s _{Specified at ±5V, Single 5V Supplies}
s _{Operating Temperature Range: – 40°C to 85°C}
U
APPLICATIO S
s _{Wideband Amplifiers}
s _Buffers
s _{Active Filters}
s _{Video and RF Amplification}
s _{Communication Receivers}
s _{Cable Drivers}
s _{Data Acquisition Systems}
DESCRIPTIO
The LT^®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 100Ω load to ±3.8V with ±5V supplies.
On a single 5V supply, the output swings from 1V to 4V
with a 100Ω 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 –85dBc up to
5MHz for a 2V_P-P output at a gain of 2.
The LT1818/LT1819 are manufactured on Linear
Technology’s 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.
TYPICAL APPLICATIO
Single Supply Unity-Gain ADC Driver for Oversampling Applications
2.5VDC
±1VAC
5V
+
LT1818
–
5V
51.1Ω
18pF
LTC1744
A_IN+
14 BITS
50Msps
2.5V
A_IN– ^{(SET FOR 2V}P-P
FULL SCALE)
18189 TA01
FFT of Single Supply ADC Driver
0
–10
–20
–30
–40
–50
–60
–70
–80
–90
–100
–110
0
f_IN = 5.102539MHz
f_S = 50Msps
V_IN = 300mV_P-P
SFDR = 78dB
8192 POINT FFT
NO WINDOWING
OR AVERAGING
2
3
5M 10M 15M 20M 25M
FREQUENCY (Hz)
18189 TA02
18189f
1