FEATURES
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■
LTC6240/LTC6241/LTC6242
Single/Dual/Quad 18MHz,
Low Noise, Rail-to-Rail Output,
CMOS Op Amps
DESCRIPTIO
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 avail-
able in the 16-Pin SSOP as well as the 5mm
×
3mm DFN
package.
, LTC and LT are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
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■
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■
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0.1Hz to 10Hz Noise: 550nV
P-P
Input Bias Current:
0.2pA (Typ at 25°C)
1pA Max (LT6240)
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 SOT-23 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
APPLICATIO S
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■
■
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■
Photo Diode Amplifiers
Charge Coupled Amplifiers
Low Noise Signal Processing
Medical Instrumentation
High Impedance Transducer Amplifier
TYPICAL APPLICATIO
C4
10pF
R1
200k
V
IN
C1
10pF
Low Noise Single-Ended Input to Differential Output Amplifier
C3
10pF
NOISE VOLTAGE (nV/√Hz)
R4
4.99k
R3
4.99k
+2.5V
60
50
40
30
20
10
V
OUT–
0
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
+
C2
10pF
1
6241 TA01a
U
10
U
U
100
1k
FREQUENCY (Hz)
10k
100k
6241 TA01b
624012fc
1
LTC6240/LTC6241/LTC6242
ABSOLUTE
AXI U RATI GS
Total Supply Voltage (V
+
to V
–
)
LTC6240/LTC6241/LTC6242 ...................................7V
LTC6240HV/LTC6241HV/LTC6242HV ...................12V
Input Voltage.......................... (V
+
+ 0.3V) to (V
–
– 0.3V)
Input Current........................................................±10mA
Output Short Circuit Duration (Note 2) ............ Indefinite
Operating Temperature Range
LTC6240C/LTC6241C/LTC6242C.......... –40°C to 85°C
LTC6240I/LTC6241I/LTC6242I ............. –40°C to 85°C
LTC6240H/LTC6241H/LTC6242H ....... –40°C to 125°C
PACKAGE/ORDER I FOR ATIO
TOP VIEW
TOP VIEW
–IN 2
+IN 3
V
–
4
–
OUT 1
V
–
2
+
–
+IN 3
4 –IN
5 V
+
NC 1
8
7
6
5
NC
V
+
OUT
NC
S5 PACKAGE
5-LEAD PLASTIC TSOT-23
T
JMAX
= 150°C,
θ
JA
= 250°C/W
S8 PACKAGE
8-LEAD PLASTIC SO
T
JMAX
= 150°C,
θ
JA
= 190°C/W
TOP VIEW
TOP VIEW
OUT A 1
–IN A 2
+IN A 3
V
–
4
A
B
8 V
+
7 OUT B
6 –IN B
5 +IN B
OUT A 1
–IN A 2
+IN A 3
V
–
4
A
B
DD PACKAGE
8-LEAD (3mm
×
3mm) PLASTIC DFN
T
JMAX
= 125°C,
θ
JA
= 43°C/W
UNDERSIDE METAL CONNECTED TO V
–
(PCB CONNECTION OPTIONAL)
S8 PACKAGE
8-LEAD PLASTIC SO
T
JMAX
= 150°C,
θ
JA
= 190°C/W
2
U
+
U
W
W W
U
W
(Note 1)
Specified Temperature Range (Note 3)
LTC6240C/LTC6241C/LTC6242C.............. 0°C to 70°C
LTC6240I/LTC6241I/LTC6242I ............. –40°C to 85°C
LTC6240H/LTC6241H/LTC6242H ....... –40°C to 125°C
Junction Temperature ........................................... 150°C
DHC, DD Package ............................................. 125°C
Storage Temperature Range....................–65ºC to 150°C
DHC, DD Package ...............................–65ºC to 125°C
Lead Temperature (Soldering, 10 sec) .................. 300°C
ORDER PART NUMBER S5 PART MARKING*
LTC6240CS5
LTC6240HVCS5
LTC6240IS5
LTC6240HVIS5
LTC6240HS5
LTC6240HVHS5
ORDER PART NUMBER
LTC6240CS8
LTC6240HVCS8
LTC6240IS8
LTC6240HVIS8
LTC6240HS8
LTC6240HVHS8
LTC6241CDD
LTC6241HVCDD
LTC6241IDD
LTC6241HVIDD
ORDER PART NUMBER
LTC6241CS8
LTC6241HVCS8
LTC6241IS8
LTC6241HVIS8
LTC6241HS8
LTC6241HVHS8
LTCRR
LTCRS
LTCRR
LTCRS
LTCRR
LTCRS
S8 PART MARKING
6240
6240HV
6240I
240HVI
6240H
240HVH
LBPD
LBRR
LBPD
LBRR
S8 PART MARKING
6241
6241HV
6241I
241HVI
6241H
241HVH
624012fc
ORDER PART NUMBER DD PART MARKING*
8
7
6
5
V
+
OUT B
–IN B
+IN B
LTC6240/LTC6241/LTC6242
PACKAGE/ORDER I FOR ATIO
TOP VIEW
TOP VIEW
OUT A
–IN A
+IN A
V
+
+IN B
–IN B
OUT B
NC
1
2
3
4
5
6
7
8
B
17
C
A
D
16 OUT D
15 –IN D
14 +IN D
13 V
–
12 +IN C
11 –IN C
10 OUT C
9
NC
OUT A
–IN A
+IN A
V
+
+IN B
–IN B
OUT B
NC
DHC16 PACKAGE
16-LEAD (5mm
×
3mm) PLASTIC DFN
T
JMAX
= 125°C,
θ
JA
= 43°C/W
UNDERSIDE METAL CONNECTED TO V
–
(PCB CONNECTION OPTIONAL)
1
2
3
4
5
6
7
8
B
C
A
D
16 OUT D
15 –IN D
14 +IN D
13 V
–
12 +IN C
11 –IN C
10 OUT C
9
NC
GN PACKAGE
16-LEAD PLASTIC SSOP
T
JMAX
= 150°C,
θ
JA
= 135°C/W
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/
*The temperature grade is identified by a label on the shipping container. Consult LTC Marketing for parts specified with wider operating temperature ranges.
AVAILABLE OPTIO S
PART NUMBER
LTC6240CS5
LTC6240CS8
LTC6240HVCS5
LTC6240HVCS8
LTC6240IS5
LTC6240IS8
LTC6240HVIS5
LTC6240HVIS8
LTC6240HS5
LTC6240HS8
LTC6240HVHS5
LTC6240HVHS8
LTC6241CS8
LTC6241CDD
LTC6241HVCS8
LTC6241HVCDD
LTC6241IS8
LTC6241IDD
LTC6241HVIS8
LTC6241HVIDD
LTC6241HS8
LTC6241HVHS8
AMPS/PACKAGE
1
1
1
1
1
1
1
1
1
1
1
1
2
2
2
2
2
2
2
2
2
2
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
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
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
–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
3V, 5V
3V, 5V, ±5V
3V, 5V, ±5V
3V, 5V
3V, 5V
3V, 5V, ±5V
3V, 5V, ±5V
3V, 5V
3V, 5V
3V, 5V, ±5V
3V, 5V, ±5V
3V, 5V
3V, 5V, ±5V
PACKAGE
SOT-23
SO-8
SOT-23
SO-8
SOT-23
SO-8
SOT-23
SO-8
SOT-23
SO-8
SOT-23
SO-8
SO-8
DD
SO-8
DD
SO-8
DD
SO-8
DD
SO-8
SO-8
PART MARKING
LTCRR
6240
LTCRS
6240HV
LTCRR
6240I
LTCRS
240HVI
LTCRR
6240H
LTCRS
240HVH
6241
LBPD
6241HV
LBRR
6241I
LBPD
241HVI
LBRR
6241H
241HVH
624012fc
U
ORDER PART NUMBER DHC PART MARKING*
LTC6242CDHC
LTC6242HVCDHC
LTC6242IDHC
LTC6242HVIDHC
ORDER PART NUMBER
LTC6242CGN
LTC6242HVCGN
LTC6242IGN
LTC6242HVIGN
LTC6242HGN
LTC6242HVHGN
6242
6242HV
6242
6242HV
GN PART MARKING
6242
6242HV
6242I
242HVI
6242H
242HVH
W
U
U
3
LTC6240/LTC6241/LTC6242
AVAILABLE OPTIO S
PART NUMBER
LTC6242CGN
LTC6242CDHC
LTC6242HVCGN
LTC6242HVCDHC
LTC6242IGN
LTC6242IDHC
LTC6242HVIGN
LTC6242HVIDHC
LTC6242HGN
LTC6242HVHGN
AMPS/PACKAGE
4
4
4
4
4
4
4
4
4
4
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
–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
3V, 5V, ±5V
PACKAGE
GN
DHC
GN
DHC
GN
DHC
GN
DHC
GN
GN
PART MARKING
6242
6242
6242HV
6242HV
6242I
6242
242HVI
6242HV
6242H
242HVH
ELECTRICAL CHARACTERISTICS
SYMBOL
V
OS
PARAMETER
Input Offset Voltage (Note 4)
(LTC6240C/I, LTC6240HVC/I, LTC6241C/I, LTC6241HVC/I, LTC6242C/I,
LTC6242HVC/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
LTC6241 S8
0°C to 70°C
–40°C to 85°C
LTC6242 GN
0°C to 70°C
–40°C to 85°C
LTC6240
0°C to 70°C
–40°C to 85°C
LTC6241 DD, LTC6242 DHC
0°C to 70°C
–40°C to 85°C
V
OS
Match Channel-to-Channel (Note 5) LTC6241 S8
0°C to 70°C
–40°C to 85°C
LTC6242 GN
0°C to 70°C
–40°C to 85°C
LTC6241 DD, LTC6242 DHC
0°C to 70°C
–40°C to 85°C
TC V
OS
I
B
Input Offset Voltage Drift (Note 6)
Input Bias Current (Notes 4, 7)
LTC6241, LTC6242
●
●
●
I
OS
Input Offset Current (Notes 4, 7)
Input Noise Voltage
4
U
MIN
TYP
40
MAX
125
250
300
150
275
300
175
300
350
550
650
725
160
300
375
185
325
400
650
700
750
2.5
75
UNITS
µV
µV
µV
µV
µV
µV
µV
µV
µV
µV
µV
µV
µV
µV
µV
µV
µV
µV
µV
µV
µV
µV/°C
pA
pA
pA
pA
pA
pA
pA
pA
nV
P-P
624012fc
50
●
●
50
●
●
100
●
●
40
●
●
50
●
●
150
●
●
●
0.7
0.2
0.2
LTC6240
●
1
75
75
LTC6241, LTC6242
●
0.2
0.2
●
LTC6240
0.1Hz to 10Hz
1
75
550
LTC6240/LTC6241/LTC6242
ELECTRICAL CHARACTERISTICS
SYMBOL
e
n
i
n
R
IN
C
IN
PARAMETER
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)
A
VOL
Large Signal Voltage Gain
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
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
Common Mode
f = 100kHz
3.5
3
Guaranteed by CMRR
0V ≤ V
CM
≤ 3.5V
●
●
●
(LTC6240C/I, LTC6240HVC/I, LTC6241C/I, LTC6241HVC/I, LTC6242C/I,
LTC6242HVC/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
f = 1kHz
MIN
TYP
7
0.56
10
12
MAX
10
UNITS
nV/√Hz
fA/√Hz
Ω
pF
pF
3.5
105
95
1600
V
dB
dB
V/mV
V/mV
V/mV
V/mV
V/mV
V/mV
30
75
325
30
75
325
mV
mV
mV
mV
mV
mV
dB
dB
V
30
1.8
●
●
V
CM
CMRR
0
80
76
425
300
200
90
60
50
●
●
215
●
●
●
●
●
●
●
●
●
●
●
●
7
40
190
11
45
190
80
74
2.8
15
104
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
Short-Circuit Current
Supply Current per Amplifier
LTC6241, LTC6242
0°C to 70°C
–40°C to 85°C
LTC6240
0°C to 70°C
–40°C to 85°C
mA
2.2
2.3
2.4
2.4
2.5
2.6
mA
mA
mA
mA
mA
mA
MHz
V/µs
MHz
ns
2
●
●
●
●
●
GBW
SR
FPBW
t
s
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%
13
5
0.53
18
10
1.06
1100
624012fc
5
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