LTC6240/LTC6241/LTC6242
Single/Dual/Quad 18MHz,
Low Noise, Rail-to-Rail Output,
CMOS Op Amps
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DESCRIPTIO
FEATURES
The LTC®6240/6241/LTC6242 are single, dual and quad
low noise, low offset, rail-to-rail output, unity gain stable
CMOSopampsthatfeature1pAofinputbiascurrent.Input
bias current is guaranteed to be 1pA max on the single
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0.1Hz to 10Hz Noise: 550nV
P-P
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Input Bias Current:
0.2pA (Typ at 25°C)
1pA Max (LT6240)
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Low Offset Voltage: 125µV Max
LTC6240. The0.1Hzto10Hznoiseofonly550nV , along
P-P
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Low Offset Drift: 2.5µV/°C Max
with an offset of just 125µV are significant improvements
over traditional CMOS op amps. Additionally, noise is
guaranteed to be less than 10nV/√Hz at 1kHz. An 18MHz
gain bandwidth, and 10V/µs slew rate, along with the wide
supplyrangeandlowinputcapacitance,makethemperfect
for use as fast signal processing amplifiers.
Gain Bandwidth Product: 18MHz
Output Swings Rail-to-Rail
Supply Operation:
2.8V to 6V LTC6240/LTC6241/LTC6242
2.8V to 5.5V LTC6240HV/LTC6241HV/LTC6242HV
Low Input Capacitance
H Grade Temperature Range: –40°C to 125°C
Single LTC6240 in 5-Pin SOT-23 Package and
8-Pin SO for PCB Guard Ring
Dual LTC6241 in 8-Pin SO and Tiny DFN Packages
Quad LTC6242 in 16-Pin SSOP and 5mm × 3mm
DFN Packages
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These op amps have an output stage that swings within
30mV of either supply rail to maximize the signal dynamic
rangeinlowsupplyapplications.Theinputcommonmode
range extends to the negative supply. They are fully speci-
fiedon3Vand5V, andanHVversionguaranteesoperation
on supplies up to 5V.
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The LTC6240 is available in the 8-pin SO and the 5-pin
SOT-23 packages. The LTC6241 is available in the 8-pin
SO, and for compact designs it is packaged in a tiny dual
fine pitch leadless (DFN) package. The LTC6242 is avail-
able in the 16-Pin SSOP as well as the 5mm × 3mm DFN
package.
APPLICATIO S
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Photo Diode Amplifiers
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Charge Coupled Amplifiers
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Low Noise Signal Processing
Medical Instrumentation
High Impedance Transducer Amplifier
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, LTC and LT are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
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TYPICAL APPLICATIO
Low Noise Single-Ended Input to Differential Output Amplifier
Noise Voltage vs Frequency
60
C3
10pF
T
V
V
= 25°C
A
S
=
2.5V
= 0V
50
40
30
20
10
0
CM
C4
10pF
R4
4.99k
C1
10pF
+2.5V
1/2
R1
200k
R3
4.99k
V
–
IN
+
–
V
V
OUT
OUT
LTC6241
+
–
–2.5V
1/2
LTC6241
+
R2
200k
1
10
100
1k
10k
100k
FREQUENCY (Hz)
6241 TA01b
C2
10pF
6241 TA01a
624012fc
1