FeAtures
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LTC6255/LTC6256/LTC6257
6.5MHz, 65µA Power
Efficient Rail-to-Rail I/O
Op Amps
Description
The
LTC
®
6255/LTC6256/LTC6257
are single/dual/quad
operational amplifiers with low noise, low power, low
supply voltage, and rail-to-rail inputs and outputs. They
are unity gain stable with or without capacitive loads.
They feature 6.5MHz gain-bandwidth product, 1.8V/µs
slew rate while consuming only 65µA of supply current
per amplifier operating on supply voltages ranging from
1.8V to 5.25V. The combination of low supply current,
low supply voltage, high gain bandwidth product and low
noise makes the LTC6255 family unique among rail-to-rail
input/output op amps with similar supply current. These
operational amplifiers are ideal for low power and low
noise applications.
For applications that require power-down, the LTC6255
and LTC6256 in S6 and MS10 packages offer shutdown
which reduces the current consumption to 7µA maximum.
The LTC6255 family can be used as plug-in replacements
for many commercially available op amps to reduce power
and improve input/output range and performance.
L,
LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and
Over-The-Top and C-Load are trademarks of Linear Technology Corporation. All other
trademarks are the property of their respective owners.
n
Gain Bandwidth Product: 6.5MHz
–3dB Bandwidth (A
V
= +1): 4.5MHz
Low Quiescent Current: 65µA
C-Load™ Op Amp Drives all Capacitive Loads
Offset Voltage: 350µV Maximum
Rail-to-Rail Input and Output
Supply Voltage Range: 1.8V to 5.25V
Input Bias Current: 50nA Maximum
CMRR/PSRR: 100dB/100dB
Shutdown Current: 7µA Maximum
Operating Temperature Range: –40°C to 125°C
Single in 6-Lead TSOT-23, 2mm × 2mm DFN Packages
Dual in 8-Lead MS8, MS10, TS0T-23, 2mm × 2mm
DFN, 2mm × 2mm Thin DFN Packages
Quad in MS16 Package
ApplicAtions
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Micropower Active Filters
Portable Instrumentation
Battery or Solar Powered Systems
Automotive Electronics
typicAl ApplicAtion
Low Power, Low Distortion ADC Driver
0
3.3V
3.3V
–10
–20
324
1%
470pF
NPO
6.34k, 1%
CS
SDO
SCK
OV
DD
MAGNITUDE (dB)
V
DD
A
IN
V
REF
–30
–40
–50
–60
–70
–80
10k
1%
625567 TA01a
LTC6255 Driving LTC2361 ADC
V
IN
= –1dBFS, 5kHz
f
S
= 125kSps
SNR = 72.5dB
SFDR = 89dB
t
ACQ
= 5µs
t
CONV
= 3µs
–
22pF
+
LTC6255
V
IN
5mV TO 2V
LTC2361
GND
–90
–100
–110
I
SUPPLY
= 540µA TOTAL AT 125kSps
0
10
20
30
40
FREQUENCY (kHz)
50
60
625567 TA01b
625567fd
For more information
www.linear.com/LTC6255
1
LTC6255/LTC6256/LTC6257
Absolute MAxiMuM rAtings
(Note 1)
Supply Voltage: V
+
– V
–
...........................................5.5V
Input Voltage .................................. V
–
– 0.2 to V
+
+ 0.2
Input Current: +IN, –IN,
SHDN
(Note 2) ..............±10mA
Output Current: OUT ........................................... ±20mA
Output Short-Circuit Duration (Note 3) ........... Indefinite
Operating Temperature Range (Note 4)
LTC6255C/LTC6256C/LTC6257C ........–40°C to 85°C
LTC6255I/LTC6256I/LTC6257I ...........–40°C to 85°C
LTC6255H/LTC6256H/LTC6257H .....–40°C to 125°C
Specified Temperature Range (Note 5)
LTC6255C/LTC6256C/LTC6257C ............ 0°C to 70°C
LTC6255I/LTC6256I/LTC6257I ...........–40°C to 85°C
LTC6255H/LTC6256H/LTC6257H .....–40°C to 125°C
Maximum Junction Temperature.......................... 150°C
Storage Temperature Range ..................–65°C to 150°C
Lead Temperature (Soldering, 10 sec)
S6, TS8, MS8, MS only ........................................300°C
pin conFigurAtion
TOP VIEW
OUTA
–INA
+INA
V
–
1
3
4
+
–
8
9
V
–
7
6
5
+
–
V
+
OUTB
–INB
+INB
OUT 1
+IN 3
V
–
2
TOP VIEW
6 V
+
+
–
2
5
SHDN
4 –IN
KC PACKAGE
8-LEAD (2mm
×
2mm
×
0.6mm) PLASTIC UTDFN
T
JMAX
= 125°C,
q
JA
= 89°C/W (NOTE 6)
EXPOSED PAD (PIN 9) IS V
–
, MUST BE SOLDERED TO PCB
TOP VIEW
OUTA
–INA
+INA
V
–
1
2
3
4
8
7
6
5
V
+
OUTB
–INB
+INB
S6 PACKAGE
6-LEAD PLASTIC TSOT-23
T
JMAX
= 150°C,
q
JA
= 192°C/W (NOTE 6)
TOP VIEW
+
–
+
–
TS8 PACKAGE
8-LEAD PLASTIC TSOT-23
T
JMAX
= 150°C,
q
JA
= 195°C/W (NOTE 6)
TOP VIEW
+
–
MS8 PACKAGE
8-LEAD PLASTIC MSOP
T
JMAX
= 150°C,
q
JA
= 163°C/W (NOTE 6)
TOP VIEW
MS PACKAGE
10-LEAD PLASTIC MSOP
T
JMAX
= 150°C,
q
JA
= 160°C/W (NOTE 6)
TOP VIEW
OUTA 1
–INA 2
+INA 3
V
–
4
9
V
–
8 V
+
7 OUTB
6 –INB
5 +INB
DC PACKAGE
8-LEAD (2mm
×
2mm
×
0.8mm) PLASTIC DFN
T
JMAX
= 125°C,
q
JA
= 102°C/W (NOTE 6)
EXPOSED PAD (PIN 9) IS V
–
, MUST BE SOLDERED TO PCB
2
+
–
OUTA
–INA
+INA
V
–
SHDNA
1
2
3
4
5
10
9
8
7
6
+
–
MS PACKAGE
16-LEAD PLASTIC MSOP
T
JMAX
= 150°C,
q
JA
= 125°C/W (NOTE 6)
TOP VIEW
V
+
1
+IN 2
V
–
3
7
V
–
6 OUT
5 –IN
4
SHDN
DC PACKAGE
6-LEAD (2mm
×
2mm) PLASTIC DFN
T
JMAX
= 125°C,
q
JA
= 102°C/W (NOTE 6)
EXPOSED PAD (PIN 7) IS V
–
, MUST BE SOLDERED TO PCB
625567fd
For more information
www.linear.com/LTC6255
+
–
V
+
OUTB
–INB
+INB
SHDNB
OUTA
–INA
+INA
V
+
+INB
–INB
OUTB
NC
1
2
3
4
5
6
7
8
+
–
OUTA
–INA
+INA
V
–
1
2
3
4
8
7
6
5
V
+
OUTB
–INB
+INB
+
–
+
–
+
–
16
15
14
13
12
11
10
9
OUTD
–IND
+IND
V
–
+INC
–INC
OUTC
NC
LTC6255/LTC6256/LTC6257
orDer inForMAtion
Lead Free Finish
TAPE AND REEL (MINI)
LTC6255CS6#TRMPBF
LTC6255IS6#TRMPBF
LTC6255HS6#TRMPBF
LTC6255CDC#TRMPBF
LTC6255IDC#TRMPBF
LTC6256CTS8#TRMPBF
LTC6256ITS8#TRMPBF
LTC6256HTS8#TRMPBF
LTC6256CKC#TRMPBF
LTC6256IKC#TRMPBF
LTC6256CDC#TRMPBF
LTC6256IDC#TRMPBF
LTC6256CMS8#PBF
LTC6256IMS8#PBF
LTC6256CMS#PBF
LTC6256IMS#PBF
LTC6257CMS#PBF
LTC6257IMS#PBF
TAPE AND REEL
LTC6255CS6#TRPBF
LTC6255IS6#TRPBF
LTC6255HS6#TRPBF
LTC6255CDC#TRPBF
LTC6255IDC#TRPBF
LTC6256CTS8#TRPBF
LTC6256ITS8#TRPBF
LTC6256HTS8#TRPBF
LTC6256CKC#TRPBF
LTC6256IKC#TRPBF
LTC6256CDC#TRPBF
LTC6256IDC#TRPBF
LTC6256CMS8#TRPBF
LTC6256IMS8#TRPBF
LTC6256CMS#TRPBF
LTC6256IMS#TRPBF
LTC6257CMS#TRPBF
LTC6257IMS#TRPBF
PART MARKING*
LTFFT
LTFFT
LTFFT
LFFV
LFFV
LTFFW
LTFFW
LTFFW
DXYT
DXYT
LGVP
LGVP
LTDXW
LTDXW
LTDXX
LTDXX
6257
6257
PACKAGE DESCRIPTION
6-Lead Plastic TSOT-23
6-Lead Plastic TSOT-23
6-Lead Plastic TSOT-23
6-Lead (2mm
×
2mm
×
0.8mm) Plastic DFN
6-Lead (2mm
×
2mm
×
0.8mm) Plastic DFN
8-Lead Plastic TSOT-23
8-Lead Plastic TSOT-23
8-Lead Plastic TSOT-23
8-Lead (2mm
×
2mm
×
0.6mm) Plastic UTDFN
8-Lead (2mm
×
2mm
×
0.6mm) Plastic UTDFN
8-Lead (2mm
×
2mm
×
0.8mm) Plastic DFN
8-Lead (2mm
×
2mm
×
0.8mm) Plastic DFN
8-Lead Plastic MSOP
8-Lead Plastic MSOP
10-Lead Plastic MSOP
10-Lead Plastic MSOP
16-Lead Plastic MSOP
16-Lead Plastic MSOP
TEMPERATURE RANGE
0°C to 70°C
–40°C to 85°C
–40°C to 125°C
0°C to 70°C
–40°C to 85°C
0°C to 70°C
–40°C to 85°C
–40°C to 125°C
0°C to 70°C
–40°C to 85°C
0°C to 70°C
–40°C to 85°C
0°C to 70°C
–40°C to 85°C
0°C to 70°C
–40°C to 85°C
0°C to 70°C
–40°C to 85°C
–40°C to 125°C
LTC6257HMS#PBF
LTC6257HMS#TRPBF
6257
16-Lead Plastic MSOP
Consult LTC Marketing for parts specified with wider operating temperature ranges.
For more information on lead free part marking, go to:
http://www.linear.com/leadfree/
For more information on tape and reel specifications, go to:
http://www.linear.com/tapeandreel/.
Some packages are available in 500 unit reels through
designated sales channels with #TRMPBF suffix.
5V electricAl chArActeristics
SYMBOL PARAMETER
V
OS
Input Offset Voltage
The
l
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
SUPPLY
= 5V, V
CM
= V
OUT
= V
SUPPLY
/2, C
L
= 10pF V
SHDN
is unconnected.
,
CONDITIONS
V
CM
= V
–
+ 0.3V (PNP Region)
l
MIN
–350
–700
–350
–700
–50
–75
–50
–75
–20
–35
–20
–35
TYP
100
100
1.5
–5
5
2
2
20
2.5
MAX
350
700
350
700
50
75
50
75
20
35
20
35
UNITS
µV
µV
µV
µV
µV/°C
nA
nA
nA
nA
nA
nA
nA
nA
nV/√Hz
µV
P-P
625567fd
V
CM
= V
+
– 0.3V (NPN Region)
l
V
OS
TC
I
B
Input Offset Voltage Drift
Input Bias Current (Note 7)
V
CM
= V
–
+ 0.3V, V
+
– 0.3V
V
CM
= V
–
+ 0.3V
l
l
V
CM
= V
+
– 0.3V
l
I
OS
Input Offset Current
V
CM
= V
–
+ 0.3V
l
V
CM
= V
+
– 0.3V
l
e
n
Input Voltage Noise Density
Input Noise Voltage
f = 1kHz
f = 0.1Hz to 10Hz
For more information
www.linear.com/LTC6255
3
LTC6255/LTC6256/LTC6257
5V electricAl chArActeristics
SYMBOL PARAMETER
i
n
R
IN
C
IN
CMRR
IVR
PSRR
A
V
Input Current Noise Density
Input Resistance
Input Capacitance
Common Mode Rejection Ratio
Input Voltage Range
Power Supply Rejection Ratio
Large Signal Gain
The
l
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
SUPPLY
= 5V, V
CM
= V
OUT
= V
SUPPLY
/2, C
L
= 10pF V
SHDN
is unconnected.
,
CONDITIONS
f = 1kHz, V
CM
= 0V to 4V (PNP Input)
f = 1kHz, V
CM
= 4V to 5V (NPN Input)
Differential
Common Mode
Differential
Common Mode
V
CM
= 0.3V to 3.5V
MIN
TYP
380
850
1
10
0.4
0.3
100
5.1
100
200
50
6
l
MAX
UNITS
f
A
/√Hz
f
A
/√Hz
MΩ
MΩ
pF
pF
dB
dB
V
dB
dB
V/mV
V/mV
V/mV
V/mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mA
mA
µA
µA
µA
µA
nA
nA
V
V
µs
µs
MHz
MHz
MHz
µs
µs
V/µs
V/µs
kHz
%
dB
nA
nA
625567fd
l
l
V
CM
= 0.4V, V
S
Ranges from 1.8V to 5V
V
OUT
= 0.5V to 4.5V, R
LOAD
= 100k
V
OUT
= 0.5V to 4.5V, R
LOAD
= 10k
l
l
l
75
71
–0.1
82
78
50
28
25
8
V
OL
Output Swing Low (Input Overdrive 30mV).
Measured from V
–
No Load
I
SINK
= 100µA
I
SINK
= 1mA
10
l
30
l
V
OH
Output Swing High (Input Overdrive 30mV).
Measured from V
+
No Load
l
24
30
l
I
SOURCE
= 100µA
I
SOURCE
= 1mA
I
SC
I
S
Output Short-Circuit Current
75
l
l
25
35
30
40
75
95
55
60
80
90
150
170
Supply Current per Amplifier
l
17
8
57
42
35
65
6
85
100
7
12
Supply Current in Shutdown
l
I
SHDN
V
IL
V
IH
t
ON
t
OFF
BW
GBW
t
S
SR
FPBW
THD+N
I
LEAK
Shutdown Pin Current
SHDN
Input Low Voltage
SHDN
Input High Voltage
Turn-On Time
Turn-Off Time
–3dB Closed Loop Bandwidth
Gain-Bandwidth Product
Settling Time, 0.5V to 4.5V, Unity Gain
Slew Rate
Full Power Bandwidth (Note 8)
Total Harmonic Distortion and Noise
Output Leakage Current in Shutdown
V
SHDN
= 0.6V
V
SHDN
= 1.5V
Disable
Enable
SHDN
Toggle from 0V to 5V
SHDN
Toggle from 5V to 0V
A
V
= 1
f = 200kHz
0.1%
0.01%
,
A
V
= –1, V
OUT
= 0.5V to 4.5V, C
LOAD
= 10pF
R
F
= R
G
= 10kΩ
4V
P-P
f = 500Hz, A
V
= 2, R
L
= 4kΩ, V
OUTP-P
= 1V
V
IN
= 2.25V to 2.75V
V
SHDN
= 0V, V
OUT
= 0V
V
SHDN
= 0V, V
OUT
= 5V
l
–1400 –1000
l
–900 –500
l
l
0.6
1.5
50
20
4.5
6.5
4
6
1.8
140
0.0022
93
l
2.5
2
l
1.0
0.75
l
l
–400
–400
400
400
4
For more information
www.linear.com/LTC6255
LTC6255/LTC6256/LTC6257
The
l
denotes the specifications which apply over the full
operating temperature range, otherwise specifications are at T
A
= 25°C. V
SUPPLY
= 1.8V, V
CM
= V
OUT
= 0.4V, C
L
= 10pF V
SHDN
is
,
unconnected.
SYMBOL PARAMETER
V
OS
Input Offset Voltage
CONDITIONS
V
CM
= V
–
+ 0.3V
l
1.8V electricAl chArActeristics
MIN
–350
–700
–350
–700
–50
–75
–50
–75
–20
–35
–20
–35
TYP
100
100
1.5
–8
5
2
2
21
2.5
580
870
1
10
0.4
0.3
MAX
350
700
350
700
50
75
50
75
20
35
20
35
UNITS
µV
µV
µV
µV
µV/°C
nA
nA
nA
nA
nA
nA
nA
nA
nV/√Hz
µV
P-P
f
A
/√Hz
f
A
/√Hz
MΩ
MΩ
pF
pF
dB
dB
V
CM
= V
+
– 0.3V
l
V
OS
TC
I
B
Input Offset Voltage Drift
Input Bias Current (Note 7)
V
CM
= V
–
+ 0.3V, V
+
– 0.3V
V
CM
= V
–
+ 0.3V
l
l
V
CM
= V
+
– 0.3V
l
I
OS
Input Offset Current
V
CM
= V
–
+ 0.3V
l
V
CM
= V
+
– 0.3V
l
e
n
i
n
R
IN
C
IN
CMRR
IVR
PSRR
A
V
Input Voltage Noise Density
Input Noise Voltage
Input Current Noise Density
Input Resistance
Input Capacitance
Common Mode Rejection Ratio
Input Voltage Range
Power Supply Rejection Ratio
Large Signal Gain
f = 1kHz, V
CM
= 0.4V
f = 0.1Hz to 10Hz
f = 1kHz, V
CM
= 0V to 0.8V (PNP Input)
f = 1kHz, V
CM
= 1V to 1.8V (NPN Input)
Differential
Common Mode
Differential
Common Mode
V
CM
= 0.2V to 1.6V
l
l
74
67
–0.1
82
78
30
17
15
5
90
1.9
100
110
50
6
35
40
40
45
75
90
V
dB
dB
V/mV
V/mV
V/mV
V/mV
mV
mV
mV
mV
mV
mV
V
CM
= 0.4V, V
S
Ranges from 1.8V to 5V
l
V
OUT
= 0.5V to 1.3V, R
LOAD
= 100k
l
V
OUT
= 0.5V to 1.3V, R
LOAD
= 10k
l
V
OL
Output Swing Low (Input Overdrive 30mV),
Measured from V
–
No Load
l
I
SINK
= 100µA
l
10
30
l
I
SINK
= 1mA
625567fd
For more information
www.linear.com/LTC6255
5
Microcontroller MCU
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