LT1126/LT1127
Dual/Quad
Decompensated Low Noise,
High Speed Precision Op Amps
FEATURES
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■
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■
■
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■
DESCRIPTIO
100% Tested Low Voltage Noise: 2.7nV/√Hz Typ,
4.2nV/√Hz Max
Slew Rate: 11V/µs Typ
Gain-Bandwidth Product: 65MHz Typ
Offset Voltage, Prime Grade: 70µV Max
Low Grade: 100µV Max
High Voltage Gain: 5 Million Min
Supply Current Per Amplifier: 3.1mA Max
Common Mode Rejection: 112dB Min
Power Supply Rejection: 116dB Min
Available in 8-Lead SOIC, 8-Lead DIP, 16-Lead SO
and 14-Lead DIP Packages
The LT
®
1126 dual and LT1127 quad are high perfor-
mance, decompensated op amps that offer higher slew
rate and bandwidth than the LT1124 dual and the LT1125
quad operational amplifiers. The enhanced AC perfor-
mance is available without degrading DC specs of the
LT1124/LT1125. Both LT1126/LT1127 are stable in a gain
of 10 or more.
In the design, processing and testing of the device, par-
ticular attention has been paid to the optimization of the
entire distribution of several key parameters. Slew rate,
gain-bandwidth and 1kHz noise are 100% tested for each
individual amplifier. Consequently, the specifications of
even the lowest cost grades (the LT1126C and the LT1127C)
have been enhanced.
Power consumption of the dual LT1126 is less than one
half of two OP-37s. Low power and high performance in an
8-pin SO package makes the LT1126 a first choice for
surface mounted systems and where board space is
restricted.
, LTC and LT are registered trademarks of Linear Technology Corporation. All other
trademarks are the property of their respective owners. Protected by U.S. Patents including
4775884, 4837496.
APPLICATIO S
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Two and Three Op Amp Instrumentation Amplifiers
Low Noise Signal Processing
Active Filters
Microvolt Accuracy Threshold Detection
Strain Gauge Amplifiers
Direct Coupled Audio Gain Stages
Tape Head Preamplifiers
Microphone Preamplifiers
Accelerometer Amplifiers
Infrared Detectors
TYPICAL APPLICATIO
– INPUT
Low Noise, Wide Bandwidth Instrumentation Amplifier
+
1/4
LT1127
–
RMS VOLTAGE NOISE DENSITY (nV/
√
Hz)
620
Ω
6.2k
10k
200
Ω
–
–
1/4
LT1127
+ INPUT
6.2k
620Ω
1/4
LT1127
OUTPUT
+
10k
+
GAIN = 1000, BANDWIDTH = 480kHz
INPUT REFERRED NOISE = 4.5nV/
√
Hz AT 1kHz, 6µV
RMS
OVER BANDWIDTH
1126-7 TA01
U
Voltage Noise vs Frequency
100
V
S
=
±
15V
T
A
= 25°C
30
10
MAXIMUM
3
1/f CORNER
2.3Hz
1
0.1
1.0
10
FREQUENCY (Hz)
1126-7 TA01b
U
U
TYPICAL
100
1000
11267fa
1
LT1126/LT1127
ABSOLUTE
AXI U RATI GS
(Note 1)
Operating Temperature Range
LT1126AM/LT1126M
LT1127AM/LT1127M
(OBSOLETE) ..
–55°C to 125°C
LT1126AC/LT1126C
LT1127AC/LT1127C ............................ –40°C to 85°C
Storage Temperature Range
All Grades ......................................... –65°C to 150°C
Supply Voltage .....................................................
±22V
Input Voltage ............................ Equal to Supply Voltage
Output Short Circuit Duration .......................... Indefinite
Differential Input Current (Note 5) ......................± 25mA
Lead Temperature (Soldering, 10 sec.)................. 300°C
PACKAGE/ORDER I FOR ATIO
TOP VIEW
+IN A
1
V
–
2
+IN B
3
B
8
A
–IN A
OUT A
V
+
OUT B
ORDER PART
NUMBER
LT1126CS8
S8 PART
MARKING
7
6
5
–IN B
4
S8 PACKAGE
8-LEAD PLASTIC SO
T
JMAX
= 140°C,
θ
JA
= 190°C/W
NOTE: THIS PIN CONFIGURATION DIFFERS FROM THE
8-PIN PDIP CONFIGURATION. INSTEAD, IT FOLLOWS
THE INDUSTRY STANDARD LT1013DS8 SO PACKAGE
PIN LOCATIONS
1126
LT1127CSW
TOP VIEW
OUT A
1
A
D
16 OUT D
15 –IN D
14 +IN D
13 V
–
B
C
12 +IN C
11 –IN C
10 OUT C
9
NC
–IN A 2
+IN A 3
V
+
4
+IN B 5
–IN B 6
OUT B 7
NC 8
SW PACKAGE
16-LEAD PLASTIC SO WIDE
T
JMAX
= 140°C,
θ
JA
= 130°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/
Consult LTC Marketing for parts specified with wider operating temperature ranges.
2
U
U
W
W W
U
W
TOP VIEW
OUT A 1
–IN A 2
+IN A 3
V
–
4
B
5
N8 PACKAGE
8-LEAD PDIP
A
8
7
6
V
+
ORDER PART
NUMBER
LT1126ACN8
LT1126CN8
OUT B
–IN B
+IN B
T
JMAX
= 140°C,
θ
JA
= 130°C
J8 PACKAGE
8-LEAD CERAMIC DIP
T
JMAX
= 160°C,
θ
JA
= 100°C/W
OBSOLETE PACKAGE
Consider the N8 for Alternate Source
TOP VIEW
OUT A
–IN A
+IN A
V
+
+IN B
–IN B
OUT B
1
2
3
4
5
6
7
N PACKAGE
14-LEAD PDIP
B
C
A
D
14 OUT D
13 –IN D
12 +IN D
11 V
–
10 +IN C
9
8
–IN C
OUT C
LT1126AMJ8
LT1126MJ8
LT1126CJ8
LT1127ACN
LT1127CN
T
JMAX
= 140°C,
θ
JA
= 110°C (N)
J PACKAGE
14-LEAD CERAMIC DIP
T
JMAX
= 160°C,
θ
JA
= 80°C/W
OBSOLETE PACKAGE
Consider the N for Alternate Source
LT1127AMJ
LT1127MJ
LT1127CJ
11267fa
LT1126/LT1127
ELECTRICAL CHARACTERISTICS
V
S
=
±15V,
T
A
= 25°C, unless otherwise noted.
SYMBOL
V
OS
∆V
OS
∆Time
I
OS
I
B
e
n
PARAMETER
Input Offset Voltage
Long Term Input Offset
Voltage Stability
Input Offset Current
Input Bias Current
Input Noise Voltage
Input Noise Voltage Density
i
n
V
CM
CMRR
PSRR
A
VOL
V
OUT
SR
GBW
Z
O
I
S
Input Noise Current Density
Input Voltage Range
Common Mode Rejection Ratio
Power Supply Rejection Ratio
Large Signal Voltage Gain
Maximum Output Voltage Swing
Slew Rate
Gain-Bandwidth Product
Open Loop Output Resistance
Supply Current Per Amplifier
Channel Separation
f
≤
10Hz (Note 9)
V
O
=
±10V,
R
L
= 2kΩ
134
V
CM
=
±12V
V
S
=
±
4V to
±18V
R
L
≥
10kΩ, V
O
=
±10V
R
L
≥
2kΩ, V
O
=
±10V
R
L
≥
2kΩ
R
L
≥
2kΩ (Notes 3, 7)
f
O
= 10kHz (Note 3)
V
O
= 0, I
O
= 0
CONDITIONS (Note 2)
LT1126
LT1127
LT1126AM/AC
LT1127AM/AC
MIN
TYP
MAX
20
25
0.3
5
6
±
7
70
3.0
2.7
1.3
0.3
±
12.0
±
12.8
112
116
5.0
2.0
8.0
45
126
126
17.0
4.0
11
65
75
2.6
150
3.1
130
106
110
3.0
1.5
8.0
45
70
90
LT1126M/C
LT1127M/C
MIN
TYP
MAX
25
30
0.3
6
7
±
8
70
3.0
2.7
1.3
0.3
±
12.0
±
12.8
124
124
15.0
3.0
11
65
75
2.6
150
3.1
100
140
UNITS
µV
µV
µV/Mo
nA
nA
nA
nVp-p
nV/√Hz
nV/√Hz
pA/√Hz
pA/√Hz
V
dB
dB
V/µV
V/µV
V
V/µs
MHz
Ω
mA
dB
LT1126
LT1127
0.1Hz to 10Hz (Notes 8, 9)
f
O
= 10Hz (Note 5)
f
O
= 1000Hz (Note 3)
f
O
= 10Hz
f
O
= 1000Hz
15
20
±
20
200
5.5
4.2
20
30
±
30
5.5
4.2
±
13.0
±
13.8
±
12.5
±
13.8
The
●
denotes the specifications which apply over the full operating temperature range, otherwise specifications are at V
S
=
±15V,
−
55°C
≤
T
A
≤
125°C, unless otherwise noted.
LT1126AM
LT1127AM
MIN TYP MAX
●
●
●
●
●
●
●
SYMBOL
V
OS
∆V
OS
∆Temp
I
OS
I
B
V
CM
CMRR
PSRR
A
VOL
V
OUT
SR
I
S
PARAMETER
Input Offset Voltage
Average Input Offset Voltage Drift
Input Offset Current
Input Bias Current
Input Voltage Range
Common Mode Rejection Ratio
Power Supply Rejection Ratio
Large Signal Voltage Gain
Maximum Output Voltage Swing
Slew Rate
Supply Current Per Amplifier
CONDITIONS (Note 1)
LT1126
LT1127
(Note 5)
LT1126
LT1127
LT1126M
LT1127M
MIN
TYP MAX
60
70
0.4
20
20
±
20
±
11.3
±
12
100
104
2.0
0.7
7.0
120
120
10.0
2.0
10
2.8
3.5
250
290
1.5
60
70
±
70
UNITS
µV
µV
µV/°C
nA
nA
nA
V
dB
dB
V/µV
V/µV
V
V/µs
mA
11267fa
50
55
0.3
18
18
±
18
±
11.3
±
12
106
110
3.0
1.0
7.2
122
122
10.0
3.0
10
2.8
170
190
1.0
45
55
±
55
V
CM
=
±11.3V
V
S
=
±
4V to
±18V
R
L
≥
10kΩ, V
O
=
±10V
R
L
≥
2kΩ, V
O
=
±10V
R
L
≥
2kΩ
R
L
≥
2kΩ (Notes 3, 7)
●
●
●
●
●
●
●
±
12.5
±
13.6
3.5
±
12.0
±
13.6
3
LT1126/LT1127
The
●
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at V
S
=
±15V,
0°C
≤
T
A
≤
70°C, unless otherwise noted.
LT1126AC
LT1127AC
TYP MAX
35
120
40
140
0.3
1.0
6
25
7
35
±
8
±
35
±
12.4
125
125
15.0
3.5
±
13.7
10.5
2.7
3.3
LT1126C
LT1127C
MIN
TYP MAX
45
170
50
210
0.4
1.5
7
35
8
45
±
9
±
45
±
11.5
±
12.4
102
122
107
122
2.5
14.0
1.0
2.5
±
12.0
±
13.7
7.3
10.5
2.7
3.3
ELECTRICAL CHARACTERISTICS
SYMBOL
V
OS
PARAMETER
Input Offset Voltage
Average Input Offset Voltage Drift
Input Offset Current
Input Bias Current
Input Voltage Range
Common Mode Rejection Ratio
Power Supply Rejection Ratio
Large Signal Voltage Gain
Maximum Output Voltage Swing
Slew Rate
Supply Current Per Amplifier
∆V
OS
/∆T
I
OS
I
B
V
CM
CMRR
PSRR
A
VOL
V
OUT
SR
I
S
CONDITIONS (Note 2)
LT1126
LT1127
(Note 5)
LT1126
LT1127
MIN
●
●
●
●
●
●
●
●
●
●
●
●
●
●
V
CM
=
±11.5V
V
S
=
±4V
to
±18V
R
L
≥
10kΩ, V
O
=
±10V
R
L
≥
2kΩ, V
O
=
±10V
R
L
≥
2kΩ
R
L
≥
2kΩ (Notes 3, 7)
±
11.5
109
112
4.0
1.5
±
12.5
7.5
UNITS
µV
µV
µV/°C
nA
nA
nA
V
dB
dB
V/µV
V/µV
V
V/µs
mA
The
●
denotes the specifications which apply over the full operating temperature range, otherwise specifications are at V
S
=
±15V,
−40°C ≤
T
A
≤
85°C, unless otherwise noted. (Note 10)
LT1126AC
LT1127AC
MIN TYP MAX
●
●
●
●
●
●
●
●
●
●
●
●
●
●
SYMBOL
V
OS
∆V
OS
/∆T
I
OS
I
B
V
CM
CMRR
PSRR
A
VOL
V
OUT
SR
I
S
PARAMETER
Input Offset Voltage
Average Input Offset Voltage Drift
Input Offset Current
Input Bias Current
Input Voltage Range
Common Mode Rejection Ratio
Power Supply Rejection Ratio
Large Signal Voltage Gain
Maximum Output Voltage Swing
Slew Rate
Supply Current Per Amplifier
CONDITIONS (Note 2)
LT1126
LT1127
(Note 5)
LT1126
LT1127
LT1126C
LT1127C
MIN
TYP MAX
50
200
55
240
0.4
1.5
17
55
17
65
±
17
±
65
±
11.4
±
12.2
101
121
106
121
2.2
12.0
0.8
2.3
±
12.0
±
13.6
7.1
10.2
2.8
3.4
UNITS
µV
µV
µV/°C
nA
nA
nA
V
dB
dB
V/µV
V/µV
V
V/µs
mA
V
CM
=
±11.4V
V
S
=
±
4V to
±18V
R
L
≥
10kΩ, V
O
=
±10V
R
L
≥
2kΩ, V
O
=
±10V
R
L
≥
2kΩ
R
L
≥
2kΩ (Note 7)
±
11.4
107
111
3.5
1.2
±
12.5
7.3
40
140
45
160
0.3
1.0
15
40
15
50
±
15
±
50
±
12.2
124
124
12.0
3.2
±
13.6
10.2
2.8
3.4
Note 1:
Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2:
Typical parameters are defined as the 60% yield of parameter
distributions of individual amplifiers; i.e., out of 100 LT1127s (or 100
LT1126s) typically 240 op amps (or 120) will be better than the indicated
specification.
Note 3:
This parameter is 100% tested for each individual amplifier.
Note 4:
This parameter is sample tested only.
Note 5:
This parameter is not 100% tested.
Note 6:
The inputs are protected by back-to-back diodes. Current limiting
resistors are not used in order to achieve low noise. If differential input
voltage exceeds
±1.4V,
the input current should be limited to 25mA.
Note 7:
Slew rate is measured in A
V
= –10; input signal is
±1V,
output
measured at
±5V.
Note 8:
0.1Hz to 10Hz noise can be inferred from the 10Hz noise voltage
density test. See the test circuit and frequency response curve for 0.1Hz to
10Hz tester in the Applications Information section of the LT1007 or
LT1028 datasheets.
Note 9:
This parameter is guaranteed but not tested.
Note 10:
The LT1126/LT1127 are designed, characterized and expected to
meet these extended temperature limits, but are not tested at –40°C and at
85°C. Guaranteed I grade parts are available. Consult factory.
11267fa
4
LT1126/LT1127
TYPICAL PERFOR A CE CHARACTERISTICS
The typical behavior of many LT1126/LT1127 parameters
is identical to the LT1124/LT1125. Please refer to the
LT1124/LT1125 data sheet for the following performance
characteristics:
0.1Hz to 10Hz Voltage Noise
0.01Hz to 1Hz Voltage Noise
Current Noise vs Frequency
Input Bias or Offset Current vs Temperature
Output Short Circuit Current vs Time
Input Bias Current Over the Common Mode Range
Voltage Gain vs Temperature
Input Offset Voltage Drift Distribution
Offset Voltage Drift with Temperature of Representative
Units
Output Voltage Swing vs Load Current
Common Mode Limit vs Temperature
Channel Separation vs Frequency
Warm-Up Drift
Power Supply Rejection Ratio vs Frequency
Gain, Phase Shift vs Frequency
50
40
Ø
V
S
=
±
15V
T
A
= 25°C
C
L
= 10pF
VOLTAGE GAIN (dB)
30
20
10
0
–10
0.1
1.0
10
FREQUENCY (MHz)
1126-7 G01
GAIN
Voltage Gain vs Frequency
180
160
140
VOLTAGE GAIN (dB)
140
120
100
80
60
40
20
0
1k
10k
100k
SUPPLY CURRENT PER AMPLIFIER (mA)
COMMON MODE REJECTION RATIO (dB)
V
S
=
±15V
T
A
= 25°C
120
100
80
60
40
20
0
–20
0.01
1
100
10k
1M
100M
1126-7 G04
FREQUENCY (Hz)
*See LT1115 data sheet for definition of CCIF testing
11267fa
U W
Small-Signal Transient Response
60
80
Large-Signal Transient Response
50mV
+10V
PHASE SHIFT (DEGREES)
100
120
140
160
180
100
0mV
0V
–10V
–50mV
A
VCL
= –10, V
S
=
±
15V OR
±
5V
C
L
= 15pF
A
VCL
= –10, V
S
=
±
15V
1126-7 G03
1126-7 G02
Common Mode Rejection Ratio vs
Frequency
160
T
A
= 25°C
V
S
=
±15V
V
CM
=
±10V
3
Supply Current vs Supply Voltage
125°C
25°C
2
–55°C
1
0
1M
10M
1126-7 G05
0
±
5
±
10
±
15
±
20
1126-7 G06
FREQUENCY (Hz)
SUPPLY VOLTAGE (V)
5
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