LT1784_15 Datasheet, PDF (1/12 Pages) Linear Technology – 2.5MHz, Over-The-Top Low Power, Rail-to-Rail Input and Output Op Amp in SOT-23

FEATURES
n _{Operates with Inputs Above V}⁺
n _{Rail-to-Rail Input and Output}
n _{Gain Bandwidth Product: 2.5MHz}
n _{Slew Rate: 2.1V/μs}
n _{Low Input Offset Voltage: 3.5mV Max}
n _{High Voltage Gain: 1000V/mV}
n _{Single Supply Input Range: 0V to 18V}
n _{Specified on 3V, 5V and ±5V Supplies}
n _{Reverse Battery Protection to 18V}
n _{Low Power: 750μA Supply Current Max}
n _{Output Shutdown on 6-Lead Version}
n _{High Output Current: 15mA Min}
n _{Operating Temperature Range: –40°C to 85°C}
n _{Low Profile (1mm) ThinSOT™ Package}
APPLICATIONS
n _{Portable Instrumentation}
n _{Battery-Powered Systems}
n _{Sensor Conditioning}
n _{Supply Current Sensing}
n _{MUX Amplifiers}
n _{4mA to 20mA Transmitters}
LT1784
2.5MHz, Over-The-Top
Low Power, Rail-to-Rail Input
and Output Op Amp in SOT-23
DESCRIPTION
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^® 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.
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.
TYPICAL APPLICATION
Programmable Gain, A_V = 2, A_V = 20, 100kHz Amplifier
V_CC
A_V = 20
A_V = 2
IN
SHDN
V_CC
+
LT1782
–
V_EE
R2
9.09k
R1
10k
R3
1k
SHDN
V_CC
+
LT1784
OUT
–
V_EE
( ) ^{R1 + R2}
A_V = 1+
R3
( )^R1
OR 1+
R2 + R3
1784 TA01a
Programmable Gain Amplifier
Frequency Response
30
25
20
15
10
5
0
–5
–10
–15
–20
1k
A_V = 20
A_V = 2
10k
100k
1M
FREQUENCY (Hz)
10M
1784 TA01b
1784fa
1