LTC6244_15 Datasheet, PDF (1/26 Pages) Linear Technology – Dual 50MHz, Low Noise, Rail-to-Rail, CMOS Op Amp

FEATURES
n _{Input Bias Current: 1pA (Typ at 25°C)}
n _{Low Offset Voltage: 100μV Max}
n _{Low Offset Drift: 2.5μV/°C Max}
n _{0.1Hz to 10Hz Noise: 1.5μVP-P}
n _{Slew Rate: 40V/μs}
n _{Gain Bandwidth Product: 50MHz}
n _{Output Swings Rail-to-Rail}
n _{Supply Operation:}
2.8V to 6V LTC6244
2.8V to ±5.25V LTC6244HV
n _{Low Input Capacitance: 2.1pF}
n _{Available in 8-Pin MSOP and Tiny DFN Packages}
APPLICATIONS
n _{Photodiode Amplifiers}
n _{Charge Coupled Amplifiers}
n _{Low Noise Signal Processing}
n _{Active Filters}
n _{Medical Instrumentation}
n _{High Impedance Transducer Amplifier}
LTC6244
Dual 50MHz, Low Noise,
Rail-to-Rail, CMOS Op Amp
DESCRIPTION
The LTC^®6244 is a dual high speed, unity-gain stable CMOS
op amp that features a 50MHz gain bandwidth, 40V/μs slew
rate, 1pA of input bias current, low input capacitance and
rail-to-rail output swing. The 0.1Hz to 10Hz noise is just
1.5μV_P-P and 1kHz noise is guaranteed to be less than
12nV/√Hz. This excellent AC and noise performance is
combined with wide supply range operation, a maximum
offset voltage of just 100μV and drift of only 2.5μV/°C,
making it suitable for use in many fast signal processing
applications, such as photodiode amplifiers.
This op amp has an output stage that swings within 35mV
of either supply rail to maximize the signal dynamic range
in low supply applications. The input common mode
range extends to the negative supply. It is fully specified
on 3V and 5V, and an HV version guarantees operation
on supplies of ±5V.
The LTC6244 is available in the 8-pin MSOP, and for com-
pact designs, it is packaged in the tiny dual fine pitch lead
free (DFN) package.
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear
Technology Corporation. All other trademarks are the property of their respective owners.
TYPICAL APPLICATION
Very Low Noise Large Area Photodiode
5V PHILIPS
BF862
JFET
4.99k
–5V
4.7μF*
I_PD
4.99k
V_BB
0.25pF
1M
5V
–
1/2
LTC6244HV
+
V_OUT = 1M • I_PD
BW = 350kHz
NOISE = 291nV AT 10kHz
V_OUT
–5V 6244 TA01a
HAMAMATSU LARGE AREA
PHOTODIODE
S1227-1010BQ
C_PD = 3000pF
* CAN BE MICROPHONIC, FILM, X7R, IF NEEDED.
V_OS Distribution
120
110
LTC6244MS8
V_S = 5V, 0V
100 V_CM = 2.5V
90 ^TA ^{= 25°C}
80
70
60
50
40
30
20
10
0
–60 –40 –20 0
20 40 60
INPUT OFFSET VOLTAGE (μV)
6244 TA01b
6244fb
1