FeaTures
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LTC6246/LTC6247/LTC6248
180MHz, 1mA Power
Efficient Rail-to-Rail
I/O Op Amps
DescripTion
The LTC
®
6246/LTC6247/LTC6248 are single/dual/quad low
power, high speed unity gain stable rail-to-rail input/output
operational amplifiers. On only 1mA of supply current they
feature an impressive 180MHz gain-bandwidth product,
90V/µs slew rate and a low 4.2nV/√Hz of input-referred
noise. The combination of high bandwidth, high slew rate,
low power consumption and low broadband noise makes
these amplifiers unique among rail-to-rail input/output op
amps with similar supply currents. They are ideal for lower
supply voltage high speed signal conditioning systems.
The LTC6246 family maintains high efficiency performance
from supply voltage levels of 2.5V to 5.25V and is fully
specified at supplies of 2.7V and 5.0V.
For applications that require power-down, the LTC6246
and the LTC6247 in MS10 offer a shutdown pin which
disables the amplifier and reduces current consumption
to 42µA.
The LTC6246 family can be used as a plug-in replacement
for many commercially available op amps to reduce power
or to improve input/output range and performance.
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.
Gain Bandwidth Product: 180MHz
–3dB Frequency (A
V
= 1): 120MHz
Low Quiescent Current: 1mA Max
High Slew Rate: 90V/µs
Input Common Mode Range Includes Both Rails
Output Swings Rail-to-Rail
Low Broadband Voltage Noise: 4.2nV/√Hz
Power-Down Mode: 42μA
Fast Output Recovery
Supply Voltage Range: 2.5V to 5.25V
Input Offset Voltage: 0.5mV Max
Input Bias Current: 100nA
Large Output Current: 50mA
CMRR: 110dB
Open Loop Gain: 45V/mV
Operating Temperature Range: –40°C to 125°C
Single in 6-Pin TSOT-23
Dual in MS8, 2mm
×
2mm Thin DFN,TS0T-23, MS10
Quad in MS16
Low Voltage, High Frequency Signal Processing
Driving A/D Converters
Rail-to-Rail Buffer Amplifiers
Active Filters
Video Amplifiers
Fast Current Sensing Amplifiers
Battery Powered Equipment
applicaTions
n
n
n
n
n
n
n
Typical applicaTion
Low Noise Low Distortion Gain = 2 ADC Driver
3.3V 2.5V
MAGNITUDE (dB)
3.3V
V
IN
0
–10
–20
–30
CS
SDO
SCK
OV
DD
624678 TA01a
350kHz FFT Driving ADC
f
IN
= 350.195kHz
f
SAMP
= 2.2Msps
SFDR = 82dB
SNR = 70dB
1024 POINT FFT
+
LTC6246
A
IN
499
1%
10pF
V
DD
V
REF
LTC2366
GND
–40
–50
–60
–70
–80
–90
–100
–110
0
200
400
600
800
FREQUENCY (kHz)
1000
624678 TA01b
–
499
1%
624678fa
LTC6246/LTC6247/LTC6248
absoluTe MaxiMuM raTings
(Note 1)
Total Supply Voltage (V
+
to V
–
) ................................5.5V
Input Current (+IN, –IN,
SHDN)
(Note 2) .............. ±10mA
Output Current (Note 3) ..................................... ±100mA
Operating Temperature Range (Note 4) . –40°C to 125°C
Specified Temperature Range (Note 5) .. –40°C to 125°C
Storage Temperature Range .................. –65°C to 150°C
Junction Temperature ........................................... 150°C
Lead Temperature (Soldering, 10 sec)
(MSOP, TSOT Packages Only) ............................... 300°C
pin conFiguraTion
TOP VIEW
OUT A 1
+IN A 3
V
–
8
7
6
5
9
+
–
+
–
V
+
OUT B
–IN B
+IN B
TOP VIEW
+
–
TOP VIEW
+
–
–IN A 2
4
KC PACKAGE
8-LEAD PLASTIC UTDFN (2mm 2mm)
T
JMAX
= 125°C,
θ
JA
= 102°C/W (NOTE 9)
EXPOSED PAD (PIN 9) IS V
–
, MUST BE SOLDERED TO PCB
TOP VIEW
+
–
+
–
MS8 PACKAGE
8-LEAD PLASTIC MSOP
T
JMAX
= 150°C,
θ
JA
= 163°C/W (NOTE 9)
MS PACKAGE
10-LEAD PLASTIC MSOP
T
JMAX
= 150°C,
θ
JA
= 160°C/W (NOTE 9)
+IN 3
4 –IN
MS PACKAGE
16-LEAD PLASTIC MSOP
T
JMAX
= 150°C,
θ
JA
= 125°C/W (NOTE 9)
S6 PACKAGE
6-LEAD PLASTIC TSOT-23
T
JMAX
= 150°C,
θ
JA
= 192°C/W (NOTE 9)
TS8 PACKAGE
8-LEAD PLASTIC TSOT-23
T
JMAX
= 150°C,
θ
JA
= 195°C/W (NOTE 9)
orDer inForMaTion
LEAD FREE FINISH
LTC6246CS6#TRMPBF
LTC6246IS6#TRMPBF
LTC6246HS6#TRMPBF
LTC6247CKC#TRMPBF
LTC6247IKC#TRMPBF
LTC6247CMS8#PBF
LTC6247IMS8#PBF
LTC6247CTS8#TRMPBF
LTC6247ITS8#TRMPBF
LTC6247HTS8#TRMPBF
TAPE AND REEL
LTC6246CS6#TRPBF
LTC6246IS6#TRPBF
LTC6246HS6#TRPBF
LTC6247CKC#TRPBF
LTC6247IKC#TRPBF
LTC6247CMS8#TRPBF
LTC6247IMS8#TRPBF
LTC6247CTS8#TRPBF
LTC6247ITS8#TRPBF
LTC6247HTS8#TRPBF
PART MARKING*
LTDWF
LTDWF
LTDWF
DWJT
DWJT
LTDWH
LTDWH
LTDWK
LTDWK
LTDWK
PACKAGE DESCRIPTION
6-Lead Plastic TSOT-23
6-Lead Plastic TSOT-23
6-Lead Plastic TSOT-23
8-Lead (2mm
×
2mm) UTDFN
8-Lead (2mm
×
2mm) UTDFN
8-Lead Plastic MSOP
8-Lead Plastic MSOP
8-Lead Plastic TSOT-23
8-Lead Plastic TSOT-23
8-Lead Plastic TSOT-23
SPECIFIED 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
0°C to 70°C
–40°C to 85°C
–40°C to 125°C
624678fa
+
–
+
–
+
–
V
–
2
+ –
5
SHDN
+
–
OUT A
–IN A
+IN A
V+
+IN B
–IN B
OUT B
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
OUT D
–IN D
+IN D
V–
+IN C
–IN C
OUT C
TOP VIEW
OUT 1
6 V
+
OUT A 1
–IN A 2
+IN A 3
V
–
4
TOP VIEW
8 V
+
7 OUT B
6 –IN B
5 +IN B
+
–
+
–
OUT A
–IN A
+IN A
V–
1
2
3
4
8
7
6
5
V+
OUT B
–IN B
+IN B
OUT A
–IN A
+IN A
V–
SHDNA
1
2
3
4
5
10
9
8
7
6
V+
OUT B
–IN B
+IN B
SHDNB
LTC6246/LTC6247/LTC6248
orDer inForMaTion
LEAD FREE FINISH
LTC6247CMS#PBF
LTC6247IMS#PBF
LTC6248CMS#PBF
LTC6248IMS#PBF
LTC6248HMS#PBF
TAPE AND REEL
LTC6247CMS#TRPBF
LTC6247IMS#TRPBF
LTC6248CMS#TRPBF
LTC6248IMS#TRPBF
LTC6248HMS#TRPBF
PART MARKING*
LTDWM
LTDWM
6248
6248
6248
PACKAGE DESCRIPTION
10-Lead Plastic MSOP
10-Lead Plastic MSOP
16-Lead Plastic MSOP
16-Lead Plastic MSOP
16-Lead Plastic MSOP
SPECIFIED TEMPERATURE RANGE
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
TRM = 500 pieces. *Temperature grades are identified by a label on the shipping container.
Consult LTC Marketing for parts specified with wider operating temperature ranges.
Consult LTC Marketing for information on lead based finish parts.
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/
specified temperature range, otherwise specifications are at T
A
= 25°C. For each amplifier V
S
= 5V, 0V; V
SHDN
= 2V; V
CM
= V
OUT
= 2.5V,
unless otherwise noted.
SYMBOL
V
OS
PARAMETER
Input Offset Voltage
CONDITIONS
V
CM
= Half Supply
l
elecTrical characTerisTics
(V
S
= 5V)
The
l
denotes the specifications which apply across the
MIN
–500
–1000
–2.5
–3
–600
–1000
–3.5
–4
–350
–550
100
0
–250
–400
–250
–400
TYP
50
0.1
50
0.1
–2
–30
400
–10
–10
4.2
1.6
2.0
2
0.8
32
14
l
MAX
500
1000
2.5
3
600
1000
3.5
4
350
550
1000
1500
250
400
250
400
UNITS
µV
µV
mV
mV
µV
µV
mV
mV
µV/°C
nA
nA
nA
nA
nA
nA
nA
nA
nV/√Hz
µV
P-P
pA/√Hz
pF
pF
kΩ
MΩ
V/mV
V/mV
V/mV
V/mV
dB
dB
624678fa
V
CM
= V
+
– 0.5V, NPN Mode
l
∆V
OS
Input Offset Voltage Match
(Channel-to-Channel) (Note 8)
V
CM
= Half Supply
l
V
CM
= V
+
– 0.5V, NPN Mode
l
V
OS
T
C
I
B
Input Offset Voltage Drift
Input Bias Current (Note 7)
V
CM
= Half Supply
l
l
V
CM
= V
+
– 0.5V, NPN Mode
l
I
OS
Input Offset Current
V
CM
= Half Supply
l
V
CM
= V
+
– 0.5V, NPN Mode
l
e
n
i
n
C
IN
R
IN
A
VOL
Input Noise Voltage Density
Input 1/f Noise Voltage
Input Noise Current Density
Input Capacitance
Input Resistance
Large Signal Voltage Gain
f = 100kHz
f = 0.1Hz to 10Hz
f = 100kHz
Differential Mode
Common Mode
Differential Mode
Common Mode
R
L
= 1k to Half Supply (Note 10)
R
L
= 100Ω to Half Supply (Note 10)
l
30
14
5
2.5
78
76
45
15
110
CMRR
Common Mode Rejection Ratio
V
CM
= 0V to 3.5V
l
LTC6246/LTC6247/LTC6248
elecTrical characTerisTics
SYMBOL
I
CMR
PSRR
PARAMETER
Input Common Mode Range
Power Supply Rejection Ratio
Supply Voltage Range (Note 6)
V
OL
Output Swing Low (V
OUT
– V
–
)
No Load
l
specified temperature range, otherwise specifications are at T
A
= 25°C. For each amplifier V
S
= 5V, 0V; V
SHDN
= 2V; V
CM
= V
OUT
= 2.5V,
unless otherwise noted.
CONDITIONS
l
(V
S
= 5V)
The
l
denotes the specifications which apply across the
MIN
0
69
65
2.5
25
70
l
TYP
73
MAX
V
S
UNITS
V
dB
dB
V
S
= 2.5V to 5.25V
V
CM
= 1V
l
l
5.25
40
55
110
160
250
450
100
150
175
225
500
750
–35
–30
V
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mA
mA
mA
mA
I
SINK
= 5mA
I
SINK
= 25mA
l
160
70
l
V
OH
Output Swing High (V
+
– V
OUT
)
No Load
I
SOURCE
= 5mA
l
130
300
l
I
SOURCE
= 25mA
I
SC
Output Short-Circuit Current
Sourcing
l
–80
60
40
100
0.95
l
Sinking
l
I
S
Supply Current per Amplifier
V
CM
= Half Supply
V
CM
= V
+
– 0.5V
l
1
1.4
1.4
1.8
75
200
0
0
300
350
0.8
mA
mA
mA
mA
µA
µA
µA
µA
nA
nA
V
V
nA
µs
µs
MHz
MHz
MHz
ns
ns
V/µs
V/µs
MHz
1.25
42
l
I
SD
I
SHDNL
I
SHDNH
V
L
V
H
I
OSD
t
ON
t
OFF
BW
GBW
t
S
, 0.1%
t
S
, 0.01%
SR
FPBW
Disable Supply Current per Amplifier
SHDN
Pin Current Low
SHDN
Pin Current High
SHDN
Pin Input Voltage Low
SHDN
Pin Input Voltage High
Output Leakage Current Magnitude in
Shutdown
Turn-On Time
Turn-Off Time
–3dB Closed Loop Bandwidth
Gain-Bandwidth Product
Settling Time to 0.1%
Settling Time to 0.01%
Slew Rate
Full Power Bandwidth
V
SHDN
= 0.8V
V
SHDN
= 0.8V
l
–3
–4
–300
–350
2
–1.6
35
V
SHDN
= 2V
l
l
l
V
SHDN
= 0.8V, Output Shorted to Either
Supply
V
SHDN
= 0.8V to 2V
V
SHDN
= 2V to 0.8V
A
V
= 1, R
L
= 1k to Half Supply
f = 2MHz, R
L
= 1k to Half Supply
l
100
5
2
120
100
70
180
74
202
l
A
V
= –1, V
O
= 2V Step R
L
= 1k
A
V
= –1, V
O
= 2V Step R
L
= 1k
A
V
= –3.33, 4.6V Step (Note 11)
V
OUT
= 4V
P-P
(Note 13)
60
50
90
4
624678fa
LTC6246/LTC6247/LTC6248
elecTrical characTerisTics
SYMBOL
HD2/HD3
PARAMETER
Harmonic Distortion
R
L
= 1k to Half Supply
R
L
= 100Ω to Half Supply
∆G
∆θ
Differential Gain (Note 14)
Differential Phase (Note 14)
Crosstalk
specified temperature range, otherwise specifications are at T
A
= 25°C. For each amplifier V
S
= 5V, 0V; V
SHDN
= 2V; V
CM
= V
OUT
= 2.5V,
unless otherwise noted.
CONDITIONS
f
C
= 100kHz, V
O
= 2V
P-P
f
C
= 1MHz, V
O
= 2V
P-P
f
C
= 2MHz, V
O
= 2V
P-P
f
C
= 100kHz, V
O
= 2V
P-P
f
C
= 1MHz, V
O
= 2V
P-P
f
C
= 2MHz, V
O
= 2V
P-P
A
V
= 1, R
L
= 1k, V
S
= ±2.5V
A
V
= 1, R
L
= 1k, V
S
= ±2.5V
A
V
= –1, R
L
= 1k to Half Supply,
V
OUT
= 2V
P-P
, f = 1MHz
MIN
TYP
110/90
88/80
78/62
90/79
66/60
59/51
0.2
0.08
–90
%
Deg
dB
MAX
UNITS
dBc
dBc
dBc
(V
S
= 5V)
The
l
denotes the specifications which apply across the
elecTrical characTerisTics
SYMBOL
V
OS
PARAMETER
Input Offset Voltage
specified temperature range, otherwise specifications are at T
A
= 25°C. For each amplifier V
S
= 2.7V, 0V; V
SHDN
= 2V; V
CM
= V
OUT
=
1.35V, unless otherwise noted.
CONDITIONS
V
CM
= Half Supply
l
(V
S
= 2.7V)
The
l
denotes the specifications which apply across the
MIN
–100
–300
–1.75
–2.25
–700
–1000
–3.5
–4
–450
–600
50
0
–250
–350
–250
–350
TYP
500
0.75
–20
0.1
2
–100
350
–10
–10
4.6
1.7
1.8
2
0.8
32
12
l
l
MAX
1000
1400
3.25
3.75
700
1000
3.5
4
450
600
1000
1500
250
350
250
350
UNITS
µV
µV
mV
mV
µV
µV
mV
mV
µV/°C
nA
nA
nA
nA
nA
nA
nA
nA
nV/√Hz
µV
P-P
pA/√Hz
pF
pF
kΩ
MΩ
V/mV
V/mV
V/mV
V/mV
V
CM
= V
+
– 0.5V, NPN Mode
l
∆V
OS
Input Offset Voltage Match
(Channel-to-Channel) (Note 8)
V
CM
= Half Supply
l
V
CM
= V
+
– 0.5V, NPN Mode
l
V
OS
T
C
I
B
Input Offset Voltage Drift
Input Bias Current (Note 7)
V
CM
= Half Supply
l
l
V
CM
= V
+
– 0.5V, NPN Mode
l
I
OS
Input Offset Current
V
CM
= Half Supply
l
V
CM
= V
+
– 0.5V, NPN Mode
l
e
n
i
n
C
IN
R
IN
A
VOL
Input Noise Voltage Density
Input 1/f Noise Voltage
Input Noise Current Density
Input Capacitance
Input Resistance
Large Signal Voltage Gain
f = 100kHz
f = 0.1Hz to 10Hz
f = 100kHz
Differential Mode
Common Mode
Differential Mode
Common Mode
R
L
= 1k to Half Supply
(Note 12)
R
L
= 100Ω to Half Supply
(Note 12)
15
7.5
2
1.3
25
7.5
624678fa
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