FEATURES
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LT1783
1.25MHz, Over-The-Top
Micropower, Rail-to-Rail Input
and Output Op Amp in SOT-23
DESCRIPTION
The LT
®
1783 is a 1.25MHz op amp available in the small
SOT-23 package that operates on all single and split supplies
with a total voltage of 2.5V to 18V. The amplifier draws less
than 300μA of quiescent current and has reverse-battery
protection, drawing negligible current for reverse supply
voltages up to 18V.
The input range of the LT1783 includes ground, and a
unique feature of this device is its Over-The-Top
®
opera-
tion capabilitity with either or both of its inputs above the
positive rail. The inputs handle 18V both differential and
common mode, independent of supply voltage. The input
stage incorporates phase reversal protection to prevent
false outputs from occurring even when the inputs are 9V
below the negative supply.
The LT1783 can drive loads up to 18mA and still maintain
rail-to-rail capability. A shutdown feature on the 6-lead
version can disable the part, making the output high
impedance and reducing quiescent current to 5μA. The
LT1783 op amp is available in the 5- and 6-lead SOT-23
packages. For applications requiring lower power, refer
to the LT1782.
L,
LT, LTC, LTM, Linear Technology, the Linear logo and Over-The-Top are registered
trademarks of Linear Technology Corporation. ThinSOT is a trademark of Linear Technology
Corporation. All other trademarks are the property of their respective owners.
Operates with Inputs Above V
+
Rail-to-Rail Input and Output
Micropower: 300μA Supply Current Max
Operating Temperature Range: –40°C to 125°C
Gain Bandwidth Product: 1.25MHz
Slew Rate: 0.42V/μs
Low Input Offset Voltage: 800μV Max
Single Supply Input Range: 0V to 18V
High Output Current: 18mA Min
Specified on 3V, 5V and ±5V Supplies
Output Shutdown on 6-Lead Version
Reverse-Battery Protection to 18V
High Voltage Gain: 1500V/mV
Low Profile (1mm) ThinSOT™ Package
APPLICATIONS
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Portable Instrumentation
Battery- or Solar-Powered Systems
Sensor Conditioning
Supply Current Sensing
Battery Monitoring
MUX Amplifiers
4mA to 20mA Transmitters
TYPICAL APPLICATION
Positive Supply Rail Current Sense
V
+
5V TO 18V
PERCENTAGE OF AMPLIFIERS
200Ω
5V
0.2Ω
200Ω
25
Distribution of Input Offset Voltage
V
S
= 5V, 0V
V
CM
= 2.5V
20
+
LT1783
2N3904
V
OUT
= 2Ω(I
LOAD
)
0V TO 4.3V
2k
1783 TA01
15
–
10
LOAD
I
LOAD
5
0
–900
–600 –300
0
300
600
INPUT OFFSET VOLTAGE (μV)
900
1783fd
1783 TA01b
1
LINEAR_DIMENSIONS [ LINEAR DIMENSIONS SEMICONDUCTOR ]
