LTC1151
Dual
±15V
Zero-Drift
Operational Amplifier
FEATURES
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DESCRIPTIO
Maximum Offset Voltage Drift: 0.05µV/°C
High Voltage Operation:
±18V
No External Components Required
Maximum Offset Voltage: 5µV
Low Noise: 1.5µV
P-P
(0.1Hz to 10Hz)
Minimum Voltage Gain: 125dB
Minimum CMRR: 106dB
Minimum PSRR: 110dB
Low Supply Current: 0.9mA/Amplifier
Single Supply Operation: 4.75V to 36V
Input Common-Mode Range Includes Ground
Typical Overload Recovery Time: 20ms
The LTC1151 is a high voltage, high performance dual
zero-drift operational amplifier. The two sample-and-hold
capacitors per amplifier required externally by other chop-
per amplifiers are integrated on-chip. The LTC1151 also
incorporates proprietary high voltage CMOS structures
which allow operation at up to 36V total supply voltage.
The LTC1151 has a typical offset voltage of 0.5µV,
drift of 0.01µV/°C, 0.1Hz to 10Hz input noise voltage of
1.5µV
P-P
, and a typical voltage gain of 140dB. It has a slew
rate of 3V/µs and a gain-bandwidth product of 2.5MHz
with a supply current of 0.9mA per amplifier. Overload
recovery times from positive and negative saturation are
3ms and 20ms, respectively.
The LTC1151 is available in a standard 8-lead plastic DIP
package as well as a 16-lead wide body SO. The LTC1151
is pin compatible with industry-standard dual op amps
and runs from standard
±15V
supplies, allowing it to plug
in to most standard bipolar op amp sockets while offering
significant improvement in DC performance.
APPLICATI
s
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S
Strain Gauge Amplifiers
Instrumentation Amplifiers
Electronic Scales
Medical Instrumentation
Thermocouple Amplifiers
High Resolution Data Acquisition
TYPICAL APPLICATI
±15V
Dual Thermocouple Amplifier
51Ω 100Ω*
240k
15V
60
0.1µF
50
NOISE VOLTAGE (nV/√Hz)
0.1µF
6
15V
V
IN
K 7
LT1025
3
V
O
GND
4
R
–
5
470k
–15V
TYPE K
2
–
8
7
OUTPUT A
100mV/°C
40
30
20
10
–
+
2k
5
1/2
LTC1151
+
240k
51Ω 100Ω*
–
0.1µF
1
OUTPUT B
100mV/°C
0
1
10
100
1k
FREQUENCY (Hz)
10k
1151 TA02
–
+
2k
3
1/2
LTC1151
4
+
0.1µF
TYPE K
* FULL SCALE TRIM: TRIM FOR 10.0V OUTPUT
WITH THERMOCOUPLE AT 100°C
–15V
1151 TA01
U
Noise Spectrum
UO
UO
1
LTC1151
ABSOLUTE
(Note 1)
AXI U
RATI GS
Operating Temperature Range
LTC1151C............................................... 0°C to 70°C
Storage Temperature Range ................ – 65°C to 150°C
Lead Temperature (Soldering, 10 sec)................. 300°C
Total Supply Voltage (V
+
to V
–
) ............................. 36V
Input Voltage (Note 2) .......... (V
+
+ 0.3V) to (V
–
– 0.3V)
Output Short Circuit Duration ......................... Indefinite
Burn-In Voltage ...................................................... 36V
PACKAGE/ORDER I FOR ATIO
TOP VIEW
OUT A 1
–IN A 2
+IN A 3
V
–
ORDER PART
NUMBER
8
7
6
5
V
+
OUT B
–IN B
+IN B
LTC1151CN8
4
N8 PACKAGE
8-LEAD PLASTIC DIP
T
JMAX
= 110°C,
θ
JA
= 130°C/ W
ELECTRICAL CHARACTERISTICS
PARAMETER
Input Offset Voltage
Average Input Offset Drift
Long Term Offset Voltage Drift
Input Offset Current
Input Bias Current
Input Noise Voltage
Input Noise Current
Input Voltage Range
Common-Mode Rejection Ratio
Power Supply Rejection Ratio
Large-Signal Voltage Gain
T
A
= 25°C
CONDITIONS
T
A
= 25°C (Note 3)
(Note 3)
V
S
=
±15V,
T
A
= Operating Temperature Range, unless otherwise specified.
MIN
q
T
A
= 25°C
q
R
S
= 100Ω, 0.1Hz to 10Hz
R
S
= 100Ω, 0.1Hz to 1Hz
f = 10Hz (Note 4)
Positive
Negative
V
CM
= V
–
to 12V
V
S
=
±2.375V
to
±16V
R
L
= 10k, V
OUT
=
±10V
q
q
q
q
q
2
U
U
W
W W
U
W
TOP VIEW
NC
NC
OUT A
–IN A
+IN A
V
–
NC
NC
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
S PACKAGE
16-LEAD PLASTIC SOL
NC
NC
V
+
OUT B
–IN B
+IN B
NC
NC
ORDER PART
NUMBER
LTC1151CS
T
JMAX
= 110°C,
θ
JA
= 200°C/ W
LTC1151C
TYP
±0.5
±0.01
50
±20
MAX
±5
±0.05
±200
±0.5
±100
±0.5
UNITS
µV
µV/°C
nV/√mo
pA
nA
pA
nA
µV
P-P
µV
P-P
fA/√Hz
V
V
dB
dB
dB
q
±15
1.5
0.5
2.2
12
–15
106
110
125
13.2
–15.3
130
130
140
LTC1151
V
S
=
±15V,
T
A
= Operating Temperature Range, unless otherwise specified.
PARAMETER
Maximum Output Voltage Swing
CONDITIONS
R
L
= 10k, T
A
= 25°C
R
L
= 10k
R
L
= 100k
R
L
= 10k, C
L
= 50pF
No Load, T
A
= 25°C
No Load
q
ELECTRICAL CHARACTERISTICS
MIN
LTC1151C
TYP
MAX
UNITS
V
V
V
V/µs
MHz
±13.5
±14.50
+10.5/–13.5
±14.95
2.5
2
0.9
1.5
2.0
Slew Rate
Gain-Bandwidth Product
Supply Current per Amplifier
Internal Sampling Frequency
q
mA
mA
Hz
1000
V
S
= 5V, T
A
= Operating Temperature Range, unless otherwise specified.
Input Offset Voltage
Average Input Offset Drift
Long Term Offset Voltage Drift
Input Offset Current
Input Bias Current
Input Noise Voltage
Input Noise Current
Input Voltage Range
Common-Mode Rejection Ratio
Power Supply Rejection Ratio
Large-Signal Voltage Gain
Maximum Output Voltage Swing
Slew Rate
Gain Bandwidth Product
Supply Current per Amplifier
Internal Sampling Frequency
The
•
denotes the specifications which apply over the full operating
temperature range.
Note 1:
Absolute Maximum Ratings are those values beyond which life of
the device may be impaired.
Note 2:
Connecting any terminal to voltages greater than V
+
or less than
V
–
may cause destructive latch-up. It is recommended that no sources
operating from external supplies be applied prior to power-up of the
LTC1151.
No Load, T
A
= 25°C
q
T
A
= 25°C (Note 3)
(Note 3)
T
A
= 25°C
T
A
= 25°C
R
S
= 100Ω, 0.1Hz to 10Hz
R
S
= 100Ω, 0.1Hz to 1Hz
f = 10Hz (Note 4)
Positive
Negative
V
CM
= 0V to 2.7V
V
S
=
±2.375V
to
±16V
R
L
= 10k, V
OUT
= 0.3V to 4.5V
R
L
= 10k to GND
R
L
= 100k to GND
R
L
= 10k, C
L
= 50pF
q
q
q
±0.05
±0.01
50
±10
±5
2.0
0.7
1.3
2.7
0
110
110
115
130
140
4.85
4.97
1.5
1.5
0.5
750
3.2
– 0.3
±5
±0.05
100
50
µV
µV/°C
nV/√mo
pA
pA
µV
P-P
µV
P-P
fA/√Hz
V
V
dB
dB
dB
V
V
V/µs
MHz
1.0
1.5
mA
mA
Hz
Note 3:
These parameters are guaranteed by design. Thermocouple
effects preclude measurement of these voltage levels in high speed
automatic test systems. V
OS
is measured to a limit determined by test
equipment capability.
Note 4:
Current Noise is calculated from the formula:
I
N
=
√(2q
• I
b
)
where q = 1.6
×
10
–19
Coulomb.
3
LTC1151
TYPICAL PERFOR A CE CHARACTERISTICS
Supply Current vs Supply Voltage
2.5
T
A
= 25°C
TOTAL SUPPLY CURRENT (mA)
COMMON-MODE RANGE (V)
2.0
TOTAL SUPPLY CURRENT (mA)
1.5
1.0
0.5
0
4
8
12 16 20 24 28 32
TOTAL SUPPLY VOLTAGE (V)
36
Output Short-Circuit Current vs
Supply Voltage
6
SHORT-CIRCUIT OUTPUT CURRENT (mA)
4
2
0
–3
–6
–9
–12
–15
4
T
A
= 25°C
V
OUT
I
SOURCE
= V
–
OUTPUT VOLTAGE (V
P-P
)
CMRR (dB)
V
OUT
= V
+
I
SINK
12 16 20 24 28 32 36
8
TOTAL SUPPLY VOLTAGE, V
+
TO V
–
(V)
1151 G04
Gain and Phase vs Frequency
100
80
V
S
= ±15V
C
L
= 100pF
PHASE
GAIN
100
GAIN (dB)
60
40
60
40
45
0
GAIN
45
0
PSRR (dB)
GAIN (dB)
20
–45
0
10
100
1k
10k 100k
FREQUENCY (Hz)
1M
10M
1151 G07
4
U W
1151 G01
Supply Current vs Temperature
2.00
V
S
= ±15V
10
5
0
–5
–10
15
Common-Mode Input Voltage
Range vs Supply Voltage
T
A
= 25°C
1.75
1.50
1.25
0
10
20
40
50
TEMPERATURE (˚C)
30
60
70
–15
0
±2.5
±5.0
±7.5
±10.0 ±12.5 ±15.0
1151 G03
SUPPLY VOLTAGE (V)
1151 G02
Undistorted Output Swing vs
Frequency
30
25
20
15
10
5
CMRR vs Frequency
160
140
120
100
80
60
40
V
S
= ±15V
V
S
= ±15V
R
L
= 10k
1k
10k
100k
FREQUENCY (Hz)
1M
1151 G05
20
0
1
10
100
1k
FREQUENCY (Hz)
10k
100k
1151 G06
0
100
Gain and Phase vs Frequency
160
135
80
V
S
= ±2.5V
C
L
= 100pF
PHASE
135
90
PSRR vs Frequency
140
120
100
80
60
40
–45
V
S
= ±15V
POSITIVE
SUPPLY
90
PHASE (DEG)
PHASE (DEG)
NEGATIVE
SUPPLY
20
0
10
100
1k
10k 100k
FREQUENCY (Hz)
1M
10M
1151 G08
20
0
1
10
100
1k
FREQUENCY (Hz)
10k
100k
1151 G09
LTC1151
TYPICAL PERFOR A CE CHARACTERISTICS
Input Bias Current Magnitude vs
Temperature
1000
V
CM
= 0
V
S
= ±15V
INPUT BIAS CURRENT (pA)
INPUT BIAS CURRENT (pA)
18
15
12
9
6
3
T
A
= 25°C
V
CM
= 0V
INPUT BIAS CURRENT (pA)
100
10
1
–50
–25
25
50
75
0
TEMPERATURE (°C)
0.1Hz to 10Hz Noise
V
S
= ±15V
T
A
= 25°C
1µV
1s
Small-Signal Transient Response
5V/DIV
50mV/DIV
2V/DIV
2ms/DIV
V
S
=
±15V,
A
V
= 1
C
L
= 100pF, R
L
= 10k
1151 G14
V
S
=
±15V,
A
V
= 1
C
L
= 100pF, R
L
= 10k
2ms/DIV
1151 G15
2V/DIV
U W
100 125
1151 G10
Input Bias Current Magnitude vs
Supply Voltage
60
45
30
Input Bias Current vs
Input Common-Mode Voltage
V
S
= 15V
T
A
= 25°C
–I
B
15
0
–15
+I
B
–30
–45
0
0
±2
±4 ±6 ±8 ±10 ±12 ±14 ±16
SUPPLY VOLTAGE (V)
1151 G11
–60
–15
–5
5
10
–10
0
INPUT COMMON-MODE VOLTAGE (V)
15
1151 G12
10s
1151 G13
Large-Signal Transient Response
Negative Overload Recovery
5
0
0
2ms/DIV
V
S
=
±15V,
A
V
= –100
NOTE: POSITIVE OVERLOAD RECOVERY IS
TYPICALLY 3ms.
1151 G16
5
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