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PDF LTC6244 Data sheet ( Hoja de datos )
| Número de pieza | LTC6244 | |
| Descripción | CMOS Op Amp | |
| Fabricantes | Linear Technology | |
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LTC6244
Dual 50MHz, Low Noise,
Rail-to-Rail, CMOS Op Amp
FEATURES
■ Input Bias Current: 1pA (Typ at 25°C)
■ Low Offset Voltage: 100µV Max
■ Low Offset Drift: 2.5µV/°C Max
■ 0.1Hz to 10Hz Noise: 1.5µVP-P
■ Slew Rate: 40V/µs
■ Gain Bandwidth Product: 50MHz
■ Output Swings Rail-to-Rail
■ Supply Operation:
2.8V to 6V LTC6244
2.8V to ±5.25V LTC6244HV
■ Low Input Capacitance: 2.1pF
■ Available in 8-Pin MSOP and Tiny DFN Packages
U
APPLICATIO S
■ Photodiode Amplifiers
■ Charge Coupled Amplifiers
■ Low Noise Signal Processing
■ Active Filters
■ Medical Instrumentation
■ High Impedance Transducer Amplifier
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DESCRIPTIO
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
1.5µVP-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.
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
TYPICAL APPLICATIO
Very Low Noise Large Area Photodiode
0.25pF
5V PHILIPS
BF862
JFET
1M
4.99k
–5V
4.7µF*
4.99k
VBB
IPD
5V
–
1/2
LTC6244HV
+
VOUT = 1M • IPD
BW = 350kHz
NOISE = 291nV AT 10kHz
VOUT
–5V 6244 TA01a
HAMAMATSU LARGE AREA
PHOTODIODE
S1227-1010BQ
CPD = 3000pF
* CAN BE MICROPHONIC, FILM, X7R, IF NEEDED.
VOS Distribution
120
110
LTC6244MS8
VS = 5V, 0V
100 VCM = 2.5V
90 TA = 25°C
80
70
60
50
40
30
20
10
0
–60 –40 –20 0
20 40
INPUT OFFSET VOLTAGE (µV)
60
6244 G01
6244f
1
1 page  
LTC6244
ELECTRICAL CHARACTERISTICS (LTC6244C/I, LTC6244HVC/I) The ● denotes the specifications which apply
over the specified temperature range, otherwise specifications are at TA = 25°C. VS = 3V, 0V, VCM = 1.5V unless otherwise noted.
SYMBOL
PARAMETER
CONDITIONS
MIN TYP MAX UNITS
CMRR
Common Mode Rejection
CMRR Match
Channel-to-Channel (Note 5)
0V ≤ VCM ≤ 1.5V
● 70
● 68
105
100
dB
dB
AVOL Large Signal Voltage Gain VO = 1V to 2V
RL = 10k to VS/2
0°C to 70°C
–40°C to 85°C
200
● 100
● 85
800
V/mV
V/mV
V/mV
VOL
VOH
PSRR
Output Voltage Swing Low (Note 9)
Output Voltage Swing High (Note 9)
Power Supply Rejection
No Load
ISINK = 1mA
No Load
ISOURCE = 1mA
VS = 2.8V to 6V, VCM = 0.2V
● 12 30
● 45 110
● 12 30
● 50 110
● 75
105
mV
mV
mV
mV
dB
PSRR Match
Channel-to-Channel (Note 5)
● 73
100
dB
Minimum Supply Voltage (Note 10)
● 2.8
V
ISC Short-Circuit Current
●8
15
mA
IS Supply Current per Amplifier
●
4.8 5.8
mA
GBW Gain Bandwidth Product
Frequency = 20kHz, RL = 1kΩ
● 35
50
MHz
(LTC6244HVC/I) The ● denotes the specifications which apply over the specified temperature range, otherwise specifications are at
TA = 25°C. VS = ±5V, 0V, VCM = 0V unless otherwise noted.
SYMBOL
PARAMETER
CONDITIONS
MIN TYP MAX UNITS
VOS
Input Offset Voltage (Note 4)
MS8 Package
0°C to 70°C
–40°C to 85°C
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DD Package
0°C to 70°C
–40°C to 85°C
VOS Match Channel-to-Channel (Note 5) MS8 Package
0°C to 70°C
–40°C to 85°C
DD Package
0°C to 70°C
–40°C to 85°C
TC VOS
Input Offset Voltage Drift, MS8 (Note 6)
IB Input Bias Current (Notes 4, 7)
IOS Input Offset Current (Notes 4, 7)
Input Noise Voltage
0.1Hz to 10Hz
en
Input Noise Voltage Density
f = 1kHz
in Input Noise Current Density (Note 8)
RIN Input Resistance
Common Mode
CIN Input Capacitance
Differential Mode
Common Mode
f = 100kHz
50 220
µV
● 275 µV
● 375 µV
100 700
µV
● 800 µV
● 1050 µV
50 250
µV
● 325 µV
● 400 µV
150 900
µV
● 1000 µV
● 1100 µV
● 0.7 2.5 µV/°C
1 pA
● 75 pA
0.5 pA
● 75 pA
1.5 µVP-P
8 12 nV/√Hz
0.56 fA/√Hz
1012 Ω
3.5 pF
2.1 pF
6244f
5
5 Page 
TYPICAL PERFOR A CE CHARACTERISTICS
LTC6244
Power Supply Rejection Ratio
vs Frequency
100
90
TA = 25°C
VS = ±2.5V
80 NEGATIVE
SUPPLY
70
60 POSITIVE
SUPPLY
50
40
30
20
10
0
–10
1k
10k 100k 1M 10M 100M
FREQUENCY (Hz)
6244 G18
Open-Loop Gain
–40
–50
TA = 25°C
VS = ±5V
–60
–70 RL = 10k
–80
RL = 1k
–90
–100
www.D–1a1ta0 S–5he–e4t4–U3.co–2m –1 0 1 2 3 4 5
OUTPUT VOLTAGE (V)
6244 G22
Offset Voltage vs Output Current
200
VS = ±5V
150
100
TA = 125°C
50
0
–50
–100
TA = 25°C
TA = –55°C
–150
– 200
–50 –40 –30 –20 –10 0 10 20 30 40 50
OUTPUT CURRENT (mA)
6244 G25
Minimum Supply Voltage
300
250 VCM = VS/2
200
150
100
50
0
–50
–100
–150
–200
TA = 125°C
–250
TA = 25°C
TA = –55°C
–300
0 1 2 3 4 5 6 7 8 9 10
TOTAL SUPPLY VOLTAGE (V)
6244 G20
Open-Loop Gain
–40
–50
TA = 25°C
VS = 5V, 0V
–60
–70
–80
–90
–100
RL = 10k
RL = 1k
–110
0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5
OUTPUT VOLTAGE (V)
6244 G22
Warm-Up Drift vs Time
–5
–10
VS = ±1.5V
–15
TA = 25°C
–20
–25 VS = ±5V
–30
VS = ±2.5V
–35
–40
–45
0 5 10 15 20 25 30 35 40 45 50 55 60
TIME AFTER POWER UP (SEC)
6244 G26
Output Short-Circuit Current
vs Power Supply Voltage
50
40
30
20 SINKING
10
0
–10
SOURCING
–20
–30
–40
–50
1.5
TA = 125°C
TA = 25°C
TA = –55°C
2 2.5 3 3.5 4 4.5
POWER SUPPLY VOLTAGE (±V)
5
6244 G21
Open-Loop Gain
–40
–50
TA = 25°C
VS = 3V, 0V
–60
–70 RL = 100k
–80 RL = 10k
–90
–100
–110
0
0.5 1 1.5 2 2.5
OUTPUT VOLTAGE (V)
3
6244 G23
Noise Voltage vs Frequency
40
TA = 25°C
35 VS = ±2.5V
VCM = 0V
30
25
20
15
10
5
0
10 100 1k 10k 100k
FREQUENCY (Hz)
6244 G27
6244f
11
11 Page | ||
| Páginas | Total 24 Páginas | |
| PDF Descargar | [ Datasheet LTC6244.PDF ] | |
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