LT1801/LT1802
1
18012fc
TYPICAL APPLICATION
DESCRIPTION
L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation. All other
trademarks are the property of their respective owners.
FEATURES
APPLICATIONS
Dual/Quad 80MHz, 25V/µs
Low Power Rail-to-Rail Input and
Output Precision Op Amps
The LT
®
1801/LT1802 are dual/quad, low power, high speed
rail-to-rail input and output operational amplifi ers with
excellent DC performance. The LT1801/LT1802 feature
reduced supply current, lower input offset voltage, lower
input bias current and higher DC gain than other devices
with comparable bandwidth.
Typically, the LT1801/LT1802 have an input offset voltage
of less than 100μV, an input bias current of less than 50nA
and an open-loop gain of 85 thousand.
The LT1801/LT1802 have an input range that includes
both supply rails and an output that swings within 20mV
of either supply rail to maximize the signal dynamic range
in low supply applications.
The LT1801/LT1802 maintain their performance for sup-
plies from 2.3V to 12.6V and are specifi ed at 3V, 5V and
±5V supplies. The inputs can be driven beyond the supplies
without damage or phase reversal of the output.
The LT1801 is available in the MS8, SO-8 and the 3mm
× 3mm × 0.8mm dual fi ne pitch leadless package (DFN)
with the standard dual op amp pinout. The LT1802 features
the standard quad op amp confi guration and is available
in the 14-pin plastic SO package. The LT1801/LT1802 can
be used as plug-in replacements for many op amps to
improve input/output range and performance.
For a single version of these amplifi ers, see the LT1800
data sheet.
n
Gain Bandwidth Product: 80MHz
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Input Common Mode Range Includes Both Rails
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Output Swings Rail-to-Rail
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Low Voltage Operation: Single or Split Supplies
2.3V to 12.6V
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Low Quiescent Current: 2mA/Amplifi er Max
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Input Offset Voltage: 350μV Max
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Input Bias Current: 250nA Max
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3mm × 3mm × 0.8mm DFN Package
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Large Output Current: 50mA Typ
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Low Voltage Noise: 8.5nV/√Hz Typ
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Slew Rate: 25V/μs Typ
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Common Mode Rejection: 105dB Typ
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Power Supply Rejection: 97dB Typ
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Open-Loop Gain: 85V/mV Typ
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Operating Temperature Range: – 40°C to 85°C
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LT1801 is Available in 8-Lead SO, MS8 and DFN
Packages
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LT1802 is Available in 14-Lead SO Package
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Low Voltage, High Frequency Signal Processing
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Driving A/D Converters
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Rail-to-Rail Buffer Amplifi ers
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Active Filters
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Video Line Driver
–
+
1/2 LT1801
47pF
220pF
V
IN
V
S
/2
909Ω
2.67k
909Ω
–
+
1/2 LT1801
22pF
V
OUT
470pF
18012 TA01
1.1k
2.21k
3V
1.1k
3V, 1MHz, 4th Order Butterworth Filter
FREQUENCY (Hz)
–80
GAIN (dB)
–40
0
–100
–60
–20
1k 100k 1M 10M 100M
18012 TA02
–120
10k
1MHz Filter Frequency Response