FEATURES
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LTC6240/LTC6241/LTC6242
Single/Dual/Quad 18MHz,
Low Noise, Rail-to-Rail Output,
CMOS Op Amps
DESCRIPTION
The LTC
®
6240/6241/LTC6242 are single, dual and quad
low noise, low offset, rail-to-rail output, unity gain stable
CMOS op amps that feature 1pA of input bias current. Input
bias current is guaranteed to be 1pA max on the single
LTC6240. The 0.1Hz to 10Hz noise of only 550nV
P-P
, along
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
supply range and low input capacitance, make them perfect
for use as fast signal processing amplifiers.
These op amps have an output stage that swings within
30mV of either supply rail to maximize the signal dynamic
range in low supply applications. The input common mode
range extends to the negative supply. They are fully speci-
fied on 3V and 5V, and an HV version guarantees operation
on supplies up to ±5V.
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 available in the
16-pin SSOP as well as the 5mm
×
3mm DFN package.
L,
LT, LTC, LTM, Linear Technology and the Linear logo 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.
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0.1Hz to 10Hz Noise: 550nV
P-P
Input Bias Current:
0.2pA (Typ at 25°C)
1pA Max (LTC6240)
Low Offset Voltage: 125μV Max
Low Offset Drift: 2.5μV/°C Max
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 Low Profile (1mm)
ThinSOT™ 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
APPLICATIONS
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Photo Diode Amplifiers
Charge Coupled Amplifiers
Low Noise Signal Processing
Medical Instrumentation
High Impedance Transducer Amplifier
TYPICAL APPLICATION
Low Noise Single-Ended Input to Differential Output Amplifier
C3
10pF
C4
10pF
R1
200k
V
IN
C1
10pF
R3
4.99k
+2.5V
R4
4.99k
60
50
NOISE VOLTAGE (nV/√Hz)
40
30
20
10
0
1
6241 TA01a
Noise Voltage vs Frequency
T
A
= 25°C
V
S
= ±2.5V
V
CM
= 0V
–
1/2
LTC6241
V
OUT
+
–
1/2
LTC6241
+
–2.5V
R2
200k
V
OUT–
+
C2
10pF
10
100
1k
FREQUENCY (Hz)
10k
100k
6241 TA01b
624012fe
1
LINEAR_DIMENSIONS [ LINEAR DIMENSIONS SEMICONDUCTOR ]
