FEATURES
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LT1784
2.5MHz, Over-The-Top
Low Power, Rail-to-Rail Input
and Output Op Amp in SOT-23
DESCRIPTIO
The LT
®
1784 is a 2.5MHz 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 750µA of quiescent current and has
reverse battery protection, drawing negligible current for
reverse supply voltages up to 18V.
The input range of the LT1784 includes ground, and a
unique feature of this device is its Over-The-Top
TM
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 LT1784 can drive loads up to 15mA 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
LT1784 op amp is available in the 5- and 6-lead
SOT-23 packages. For applications requiring lower power,
refer to the LT1782 and LT1783 data sheets.
, LTC and LT are registered trademarks of Linear Technology Corporation.
Over-The-Top and ThinSOT are trademarks of Linear Technology Corporation.
Operates with Inputs Above V
+
Rail-to-Rail Input and Output
Low Profile (1mm) ThinSOT
TM
Package
Gain Bandwidth Product: 2.5MHz
Slew Rate: 2.1V/µs
Low Input Offset Voltage: 3.5mV Max
High Voltage Gain: 1000V/mV
Single Supply Input Range: 0V to 18V
Specified on 3V, 5V and
±5V
Supplies
Reverse Battery Protection to 18V
Low Power: 750µA Supply Current Max
Output Shutdown on 6-Lead Version
High Output Current: 15mA Min
Operating Temperature Range: – 40°C to 85°C
APPLICATIO S
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Portable Instrumentation
Battery-Powered Systems
Sensor Conditioning
Supply Current Sensing
MUX Amplifiers
4mA to 20mA Transmitters
TYPICAL APPLICATIO
V
CC
A
V
= 20
A
V
= 2
SHDN
IN
SHDN
V
CC
Programmable Gain, A
V
= 2, A
V
= 20, 100kHz Amplifier
Programmable Gain Amplifier
Frequency Response
30
25
A
V
= 20
V
CC
20
15
+
LT1784
OUT
GAIN (dB)
10
5
0
–5
A
V
= 2
–
V
EE
+
LT1782
–
V
EE
R2
9.09k
R3
1k
R1
10k
A
V
= 1+
OR
1+
(
(
R1 + R2
R3
R1
R2 + R3
)
)
1784 TA01
–10
–15
–20
1k
10k
100k
1M
FREQUENCY (Hz)
10M
1784 TA01a
U
U
U
1
LINER [ LINEAR TECHNOLOGY ]
