LT1366/LT1367
LT1368/LT1369
Dual and Quad Precision
Rail-to-Rail Input and Output
Op Amps
FEATURES
s Input Common Mode Range Includes Both Rails
s Output Swings Rail-to-Rail
s Low Input Offset Voltage: 150µV
s High Common Mode Rejection Ratio: 90dB
s High AVOL: >1V/µV Driving 10kΩ Load
s Low Input Bias Current: 10nA
s Wide Supply Range: 1.8V to ±15V
s Low Supply Current: 375µA per Amplifier
s High Output Drive: 30mA
s 400kHz Gain-Bandwidth Product
s Slew Rate: 0.13V/µs
s Stable for Capacitive Loads up to 1000pF
U
APPLICATIONS
s Rail-to-Rail Buffer Amplifiers
s Low Voltage Signal Processing
s Supply Current Sensing at Either Rail
s Driving A/D Converters
, LTC and LT are registered trademarks of Linear Technology Corporation.
DESCRIPTION
The LT®1366/LT1367/LT1368/LT1369 are dual and quad
bipolar op amps which combine rail-to-rail input and
output operation with precision specifications. These op
amps maintain their characteristics over a supply range of
1.8V to 36V. Operation is specified for 3V, 5V and ±15V
supplies. Input offset voltage is typically 150µV, with an
open-loop gain AVOL of 1 million while driving a 10k load.
Common mode rejection is typically 90dB over the full rail-
to-rail input range, and supply rejection is 110dB.
The LT1366/LT1367 have conventional compensation
which assures stability for capacitive loads of 1000pF or
less. The LT1368/LT1369 have compensation that
requires a 0.1µF output capacitor, which improves the
amplifier’s supply rejection and reduces output imped-
ance at high frequencies. The output capacitor’s filtering
action reduces high frequency noise, which is beneficial
when driving A/D converters.
The LT1366/LT1368 are available in plastic 8-pin PDIP and
8-lead SO packages with the standard dual op amp pinout.
The LT1367/LT1369 feature the standard quad pinout,
which is available in a plastic 14-lead SO package. These
devices can be used as plug-in replacements for many
standard op amps to improve input/output range and
precision.
TYPICAL APPLICATION
VCC R1
200Ω
Positive Supply Rail Current Sense
Rs
0.2Ω
ILOAD
LOAD
–
1/2 LT1366
+
R2
20k
Q1
TP0610L
–
1/2 LT1366
+
( )VO = ILOAD • RS
R2
R1
= ILOAD • 20Ω
1366 TA01
Output Saturation Voltage vs Load Current
1000
POSITIVE
100 RAIL
NEGATIVE
RAIL
10
1
0.001
0.01 0.1
1
LOAD CURRENT (mA)
10
1366 TA02
1
