LTC6242_15 Datasheet, PDF (1/32 Pages) Linear Technology – Single/Dual/Quad 18MHz, Low Noise, Rail-to-Rail Output, CMOS Op Amps

LTC6240/LTC6241/LTC6242
Single/Dual/Quad 18MHz,
Low Noise, Rail-to-Rail Output,
CMOS Op Amps
FEATURES
DESCRIPTION
n _{0.1Hz to 10Hz Noise: 550nVP-P}
n _{Input Bias Current:}
0.2pA (Typ at 25°C)
1pA Max (LTC6240)
n _{Low Offset Voltage: 125μV Max}
n _{Low Offset Drift: 2.5μV/°C Max}
n _{Gain Bandwidth Product: 18MHz}
n _{Output Swings Rail-to-Rail}
n _{Supply Operation:}
2.8V to 6V LTC6240/LTC6241/LTC6242
2.8V to ±5.5V LTC6240HV/LTC6241HV/LTC6242HV
n _{Low Input Capacitance}
n _{H-Grade Temperature Range: –40°C to 125°C}
n _{Single LTC6240 in 5-Pin Low Profile (1mm)}
ThinSOT™ Package and 8-Pin SO for PCB Guard Ring
n _{Dual LTC6241 in 8-Pin SO and Tiny DFN Packages}
n _{Quad LTC6242 in 16-Pin SSOP and 5mm × 3mm}
DFN Packages
APPLICATIONS
n _{Photo Diode Amplifiers}
n _{Charge Coupled Amplifiers}
n _{Low Noise Signal Processing}
n _{Medical Instrumentation}
n _{High Impedance Transducer Amplifier}
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.
TYPICAL APPLICATION
Low Noise Single-Ended Input to Differential Output Amplifier
C3
10pF
C1
R1
10pF
200k
V_IN
–
1/2
LTC6241
+
C4
10pF
R3
4.99k
R2
200k
R4
4.99k
+2.5V
–
1/2
LTC6241
+
–2.5V
V_OUT+
V_OUT–
C2
10pF
6241 TA01a
Noise Voltage vs Frequency
60
T_A = 25°C
V_S = ±2.5V
50
V_CM = 0V
40
30
20
10
0
1
10
100
1k
10k 100k
FREQUENCY (Hz)
6241 TA01b
624012fe
1