LTC6244
Dual 50MHz, Low Noise,
Rail-to-Rail, CMOS Op Amp
FEATURES
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DESCRIPTIO
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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: 1.5µV
P-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
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.
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
APPLICATIO S
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Photodiode Amplifiers
Charge Coupled Amplifiers
Low Noise Signal Processing
Active Filters
Medical Instrumentation
High Impedance Transducer Amplifier
TYPICAL APPLICATIO
5V
PHILIPS
BF862
JFET
5V
4.99k
–5V
4.7µF*
4.99k
V
BB
HAMAMATSU LARGE AREA
PHOTODIODE
S1227-1010BQ
C
PD
= 3000pF
* CAN BE MICROPHONIC, FILM, X7R, IF NEEDED.
I
PD
Very Low Noise Large Area Photodiode
0.25pF
120
110
1M
NUMBER OF UNITS
V
OUT
= 1M • I
PD
BW = 350kHz
NOISE = 291nV AT 10kHz
V
OUT
100
90
80
70
60
50
40
30
20
10
0
–60
LTC6244MS8
V
S
= 5V, 0V
V
CM
= 2.5V
T
A
= 25°C
–
1/2
LTC6244HV
+
–5V
6244 TA01a
20
40
–40 –20
0
INPUT OFFSET VOLTAGE (µV)
U
V
OS
Distribution
60
6244 G01
U
U
6244f
1
LTC6244
ABSOLUTE
AXI U RATI GS
Total Supply Voltage (V
+
to V
–
)
LTC6244 .................................................................7V
LTC6244HV ...........................................................12V
Input Voltage.......................... (V
+
+ 0.3V) to (V
–
– 0.3V)
Input Current........................................................±10mA
Output Short Circuit Duration (Note 2) ............ Indefinite
Operating Temperature Range
LTC6244C ............................................ –40°C to 85°C
LTC6244I ............................................. –40°C to 85°C
LTC6244H .......................................... –40°C to 125°C
PACKAGE/ORDER I FOR ATIO
TOP VIEW
OUT A 1
–IN A 2
+IN A 3
V
–
9
A
B
8 V
+
7 OUT B
6 –IN B
5 +IN B
OUT A
–IN A
+IN A
V
–
1
2
3
4
4
DD PACKAGE
8-LEAD (3mm
´
3mm) PLASTIC DFN
T
JMAX
= 125°C,
θ
JA
= 43°C/W
EXPOSED PAD (PIN 9) CONNECTED TO V
–
(PCB CONNECTION OPTIONAL)
ORDER PART NUMBER
LTC6244CDD
LTC6244HVCDD
LTC6244IDD
LTC6244HVIDD
DD PART MARKING*
LCCF
LCGD
LCCF
LCGD
Order Options
Tape and Reel: Add #TR
Lead Free: Add #PBF Lead Free Tape and Reel: Add #TRPBF
Lead Free Part Marking:
http://www.linear.com/leadfree/
Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identifed by a label on the shipping container.
2
U
U
W
W W
U
W
(Note 1)
Specified Temperature Range (Note 3)
LTC6244C ................................................ 0°C to 70°C
LTC6244I ............................................. –40°C to 85°C
LTC6244H .......................................... –40°C to 125°C
Junction Temperature ........................................... 150°C
DD Package ...................................................... 125°C
Storage Temperature Range................... –65°C to 150°C
DD Package ....................................... –65°C to 125°C
Lead Temperature (Soldering, 10 sec) .................. 300°C
TOP VIEW
8
7
6
5
V
+
OUT B
–IN B
+IN B
MS8 PACKAGE
8-LEAD PLASTIC MSOP
T
JMAX
= 150°C,
θ
JA
= 250°C/W
ORDER PART NUMBER
LTC6244CMS8
LTC6244HVCMS8
LTC6244IMS8
LTC6244HVIMS8
LTC6244HMS8
MS8 PART MARKING*
LTCCM
LTCGF
LTCCM
LTCGF
LTCCM
6244f
LTC6244
AVAILABLE OPTIO S
PART NUMBER
LTC6244CMS8
LTC6244CDD
LTC6244HVCMS8
LTC6244HVCDD
LTC6244IMS8
LTC6244IDD
LTC6244HVIMS8
LTC6244HVIDD
LTC6244HMS8
SPECIFIED TEMP RANGE
0°C to 70°C
0°C to 70°C
0°C to 70°C
0°C to 70°C
–40°C to 85°C
–40°C to 85°C
–40°C to 85°C
–40°C to 85°C
–40°C to 125°C
SPECIFIED SUPPLY VOLTAGE
3V, 5V
3V, 5V
3V, 5V, ±5V
3V, 5V, ±5V
3V, 5V
3V, 5V
3V, 5V, ±5V
3V, 5V, ±5V
3V, 5V
PACKAGE
MS8
DD
MS8
DD
MS8
DD
MS8
DD
MS8
PART MARKING
LTCCM
LCCF
LTCGF
LCGD
LTCCM
LCCF
LTCGF
LCGD
LTCCM
ELECTRICAL CHARACTERISTICS
SYMBOL
V
OS
PARAMETER
Input Offset Voltage (Note 4)
(LTC6244C/I, LTC6244HVC/I) The
●
denotes the specifications which apply
over the specified temperature range, otherwise specifications are at T
A
= 25°C. V
S
= 5V, 0V, V
CM
= 2.5V unless otherwise noted.
CONDITIONS
MS8 Package
0°C to 70°C
–40°C to 85°C
DD Package
0°C to 70°C
–40°C to 85°C
V
OS
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 V
OS
I
B
I
OS
Input Offset Voltage Drift, MS8 (Note 6)
Input Bias Current (Notes 4, 7)
Input Offset Current (Notes 4, 7)
Input Noise Voltage
e
n
i
n
R
IN
C
IN
Input Noise Voltage Density
Input Noise Current Density (Note 8)
Input Resistance
Input Capacitance
Differential Mode
Common Mode
Input Voltage Range
Common Mode Rejection
CMRR Match
Channel-to-Channel (Note 5)
Common Mode
f = 100kHz
3.5
2.1
Guaranteed by CMRR
0V ≤ V
CM
≤ 3.5V
●
●
●
●
●
●
●
●
●
●
●
●
●
●
V
CM
CMRR
U
MIN
TYP
40
MAX
100
225
300
650
800
950
160
275
325
800
900
1.1
2.5
75
UNITS
µV
µV
µV
µV
µV
µV
µV
µV
µV
µV
µV
mV
µV/°C
pA
pA
pA
pA
µV
P-P
nV/√Hz
fA/√Hz
Ω
pF
pF
100
40
150
0.7
1
0.5
75
1.5
8
0.56
10
12
12
0.1Hz to 10Hz
f = 1kHz
0
74
72
105
100
3.5
V
dB
dB
6244f
3
LTC6244
ELECTRICAL CHARACTERISTICS
SYMBOL
A
VOL
PARAMETER
Large Signal Voltage Gain
(LTC6244C/I, LTC6244HVC/I) The
●
denotes the specifications which apply
over the specified temperature range, otherwise specifications are at T
A
= 25°C. V
S
= 5V, 0V, V
CM
= 2.5V unless otherwise noted.
CONDITIONS
V
O
= 1V to 4V
R
L
= 10k to V
S
/2
0°C to 70°C
–40°C to 85°C
V
O
= 1.5V to 3.5V
R
L
= 1k to V
S
/2
0°C to 70°C
–40°C to 85°C
MIN
1000
600
450
300
200
150
TYP
2500
MAX
UNITS
V/mV
V/mV
V/mV
V/mV
V/mV
V/mV
35
75
300
35
75
325
mV
mV
mV
mV
mV
mV
dB
dB
V
35
6.25
35
18
1.9
50
35
3.7
535
7.4
mA
mA
MHz
V/µs
MHz
ns
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
1000
V
OL
Output Voltage Swing Low (Note 9)
No Load
I
SINK
= 1mA
I
SINK
= 5mA
No Load
I
SOURCE
= 1mA
I
SOURCE
= 5mA
V
S
= 2.8V to 6V, V
CM
= 0.2V
15
40
150
15
45
175
75
73
2.8
25
105
100
V
OH
Output Voltage Swing High (Note 9)
PSRR
Power Supply Rejection
PSRR Match
Channel-to-Channel (Note 5)
Minimum Supply Voltage (Note 10)
I
SC
I
S
GBW
SR
FPBW
t
s
Short-Circuit Current
Supply Current per Amplifier
Gain Bandwidth Product
Slew Rate (Note 11)
Full Power Bandwidth (Note 12)
Settling Time
Frequency = 20kHz, R
L
= 1kΩ
A
V
= –2, R
L
= 1kΩ
V
OUT
= 3V
P-P
, R
L
= 1kΩ
V
STEP
= 2V, A
V
= –1, R
L
= 1kΩ, 0.1%
(LTC6244C/I, LTC6244HVC/I) The
●
denotes the specifications which apply over the specified temperature range, otherwise
specifications are at T
A
= 25°C. V
S
= 3V, 0V, V
CM
= 1.5V unless otherwise noted.
SYMBOL
V
OS
PARAMETER
Input Offset Voltage (Note 4)
CONDITIONS
MS8 Package
0°C to 70°C
–40°C to 85°C
DD Package
0°C to 70°C
–40°C to 85°C
V
OS
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
I
B
I
OS
Input Bias Current (Notes 4, 7)
Input Offset Current (Notes 4, 7)
Input Noise Voltage
e
n
i
n
V
CM
Input Noise Voltage Density
Input Noise Current Density (Note 8)
Input Voltage Range
Guaranteed by CMRR
●
●
●
●
●
●
●
●
●
●
●
MIN
TYP
40
MAX
175
250
325
650
800
950
200
300
350
800
900
1.1
75
UNITS
µV
µV
µV
µV
µV
µV
µV
µV
µV
µV
µV
mV
pA
pA
pA
pA
µV
P-P
nV/√Hz
fA/√Hz
V
6244f
100
40
150
1
0.5
75
1.5
8
0.56
0
1.5
12
0.1Hz to 10Hz
f = 1kHz
4
LTC6244
ELECTRICAL CHARACTERISTICS
SYMBOL
CMRR
PARAMETER
Common Mode Rejection
CMRR Match
Channel-to-Channel (Note 5)
A
VOL
Large Signal Voltage Gain
V
O
= 1V to 2V
R
L
= 10k to V
S
/2
0°C to 70°C
–40°C to 85°C
No Load
I
SINK
= 1mA
No Load
I
SOURCE
= 1mA
V
S
= 2.8V to 6V, V
CM
= 0.2V
(LTC6244C/I, LTC6244HVC/I) The
●
denotes the specifications which apply
over the specified temperature range, otherwise specifications are at T
A
= 25°C. V
S
= 3V, 0V, V
CM
= 1.5V unless otherwise noted.
CONDITIONS
0V ≤ V
CM
≤ 1.5V
●
●
MIN
70
68
200
100
85
TYP
105
100
800
MAX
UNITS
dB
dB
V/mV
V/mV
V/mV
●
●
●
●
●
●
●
●
●
●
●
●
V
OL
V
OH
PSRR
Output Voltage Swing Low (Note 9)
Output Voltage Swing High (Note 9)
Power Supply Rejection
PSRR Match
Channel-to-Channel (Note 5)
Minimum Supply Voltage (Note 10)
12
45
12
50
75
73
2.8
8
35
15
4.8
50
105
100
30
110
30
110
mV
mV
mV
mV
dB
dB
V
mA
I
SC
I
S
GBW
Short-Circuit Current
Supply Current per Amplifier
Gain Bandwidth Product
Frequency = 20kHz, R
L
= 1kΩ
5.8
mA
MHz
(LTC6244HVC/I) The
●
denotes the specifications which apply over the specified temperature range, otherwise specifications are at
T
A
= 25°C. V
S
= ±5V, 0V, V
CM
= 0V unless otherwise noted.
SYMBOL
V
OS
PARAMETER
Input Offset Voltage (Note 4)
CONDITIONS
MS8 Package
0°C to 70°C
–40°C to 85°C
DD Package
0°C to 70°C
–40°C to 85°C
V
OS
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 V
OS
I
B
I
OS
Input Offset Voltage Drift, MS8 (Note 6)
Input Bias Current (Notes 4, 7)
Input Offset Current (Notes 4, 7)
Input Noise Voltage
e
n
i
n
R
IN
C
IN
Input Noise Voltage Density
Input Noise Current Density (Note 8)
Input Resistance
Input Capacitance
Differential Mode
Common Mode
Common Mode
f = 100kHz
3.5
2.1
pF
pF
6244f
MIN
●
●
●
●
●
●
●
●
●
●
●
TYP
50
MAX
220
275
375
700
800
1050
250
325
400
900
1000
1100
2.5
75
UNITS
µV
µV
µV
µV
µV
µV
µV
µV
µV
µV
µV
µV
µV/°C
pA
pA
pA
pA
µV
P-P
nV/√Hz
fA/√Hz
Ω
100
50
150
0.7
1
0.5
75
1.5
8
0.56
10
12
12
0.1Hz to 10Hz
f = 1kHz
5
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