FEATURES
■
High Voltage Operation: ±16V
■
No External Components Required
■
Maximum Offset Voltage: 10µV
■
Maximum Offset Voltage Drift: 0.05µV/°C
■
Low Noise 1.8µV
■
Minimum Voltage Gain: 135dB
■
Minimum PSRR: 120dB
■
Minimum CMRR: 110dB
■
Low Supply Current: 0.8mA
■
Single Supply Operation: 4.75V to 32V
■
Input Common Mode Range Includes Ground
■
200µA Supply Current with Pin 1 Grounded
■
Typical Overload Recovery Time 20ms
(0.1Hz to 10Hz)
P-P
LTC1150
±15V Zero-Drift
Operational Amplifier with
Internal Capacitors
U
DESCRIPTIO
®
The LTC
zero-drift operational amplifier. The two sample-and-hold
capacitors usually required externally by other chopper
amplifiers are integrated on-chip. Further, LTC’s proprietary high-voltage CMOS structures allow the LTC1150 to
operate at up to 32V total supply voltage.
The LTC1150 has an offset voltage of 0.5µV, drift of
0.01µV/°C, 0.1Hz to 10Hz input noise voltage of 1.8µV
and a typical voltage gain of 180dB. The slew rate of 3V/µs
and a gain bandwidth product of 2.5MHz are achieved with
0.8mA of supply current. Overload recovery times from
positive and negative saturation conditions are 3ms and
20ms, respectively.
1150 is a high-voltage, high-performance
P-P
U
APPLICATIO S
■
Strain Gauge Amplifiers
■
Electronic Scales
■
Medical Instrumentation
■
Thermocouple Amplifiers
■
High Resolution Data Acquisition
TYPICAL APPLICATIO
Single Supply Instrumentation Amplifier Noise Spectrum
1k
+
V
1M
2
7
–
LTC1150
3
–V
IN
+
6
4
1k
For applications demanding low power consumption,
Pin 1 can be used to program the supply current. Pin 5 is
an optional AC-coupled clock input, useful for
synchronization.
The LTC1150 is available in standard 8-lead, plastic dualin-line package, as well as an 8-lead SO package. The
LTC1150 can be a plug-in replacement for most standard
bipolar op amps with significant improvement in DC
performance.
, LTC and LT are registered trademarks of Linear Technology Corporation.
U
160
1M
+
V
2
7
–
LTC1150
3
V
IN
+
6
GAIN = 1000V/V
4
OUTPUT OFFSET ≤ 5mV
TOTAL SUPPLY CURRENT
DECREASES TO 400µA
WHEN BOTH PIN 1s ARE
GROUNDED
V
OUT
LTC1150 •TA01
140
120
100
80
60
40
VOLTAGE NOISE DENSITY (nV√Hz)
20
0
10 1k 10k 100k
100
FREQUENCY (Hz)
LTC1150 •TA02
1150fb
1
LTC1150
WWWU
ABSOLUTE AXI U RATI GS
(Note 1)
Total Supply Voltage (V+ to V–) ............................... 32V
+
Input Voltage (Note 2) .............. (V
0.3V) to (V– –0.3V)
Output Short Circuit Duration .......................... Indefinite
Burn-In Voltage ....................................................... 32V
Operating Temperature Range
LTC1150M (OBSOLETE).....................–55°C to 125°C
LTC1150C .......................................... – 40°C to 85°C
Storage Temperature Range ................. –65°C to 150°C
Lead Temperature (Soldering, 10 sec).................. 300°C
UU
W
PACKAGE/ORDER I FOR ATIO
TOP VIEW
I
SUPPLY
1
–IN
2
+IN
3
–
V
4
N8 PACKAGE
8-LEAD PDIP
T
= 110°C, θJA = 130°C/W
JMAX
J8 PACKAGE
8-LEAD CERDIP
CLOCK OUT
8
+
V
7
OUT
6
EXT CLOCK
5
IN
OBSOLETE PACKAGE
Consider the N8 or S8 Package as an Alternate Source
Consult LTC Marketing for parts specified with wider operating temperature ranges.
ORDER PART
NUMBER
LTC1150CN8
LTC1150MJ8
LTC1150CJ8
I
SUPPLY
TOP VIEW
1
–IN
2
+IN
3
–
V
4
S8 PACKAGE
8-LEAD PLASTIC SO
= 110°C, θJA = 200°C/W
T
JMAX
ORDER PART
NUMBER
8
CLOCK OUT
+
V
–
+
7
OUT
6
EXT CLOCK
5
IN
LTC1150CS8
S8 PART
MARKING
1150
ELECTRICAL CHARACTERISTICS
The ● denotes the specifications which apply over the full operating
temperature range otherwise specifications are at TA = 25°C. VS = ±15V, Pin 1 = Open, unless otherwise noted.
LTC1150M LTC1150C
PARAMETER CONDITIONS MIN TYP MAX MIN TYP MAX UNITS
Input Offset Voltage (Note 3) ±0.5 ±10 ±0.5 ±10 µV
Average Input Offset Drift (Note 3) ● ±0.01 ±0.05 ±0.01 ±0.05 µV/°C
Long Term Offset Voltage Drift 50 50 nV/√mo
Input Offset Current ±20 ±60 ±20 ±200 pA
● ±1.5 ±0.5 nA
Input Bias Current ±10 ±50 ±10 ±100 pA
● ±2.5 ±1.0 nA
Input Noise Voltage RS = 100Ω, 0.1Hz to 10Hz, TC2 1.8 1.8 µV
RS = 100Ω, 0.1Hz to 1Hz, TC2 0.6 0.6
Input Noise Current f = 10Hz (Note 4) 1.8 1.8 fA/√Hz
Common Mode Rejection Ratio VCM = V– to 12V ● 110 130 110 130 dB
Power Supply Rejection Ratio VS = ±2.375V to ±16V ● 120 145 120 145 dB
Large-Signal Voltage Gain RL = 10kΩ, V
Maximum Output Voltage Swing RL = 10kΩ ±13.5 ±14.5 ±13.5 ±14.5 V
RL = 10kΩ ● 10.5/ 10.5/
RL = 100kΩ ±14.95 ±14.95
= ±10V ● 135 180 135 180 dB
OUT
–13.5 –13.5
P-P
1150fb
2
LTC1150
ELECTRICAL CHARACTERISTICS
The ● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VS = ±15V, Pin 1 = Open, unless otherwise noted.
LTC1150M LTC1150C
PARAMETER CONDITIONS MIN TYP MAX MIN TYP MAX UNITS
Slew Rate RL = 10kΩ, CL = 50pF 3 3 V/µs
Gain Bandwidth Product 2.5 2.5 MHz
Supply Current No Load 0.8 1.5 0.8 1.5 mA
No Load, Pin 1 = V
No Load
Internal Sampling Frequency 550 550 Hz
–
● 22
0.2 0.2
The ● denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C.
V
= 5V, Pin 1 = Open, unless otherwise noted.
S
LTC1150M LTC1150C
PARAMETER CONDITIONS MIN TYP MAX MIN TYP MAX UNITS
Input Offset Voltage (Note 3) ±0.5 ±10 ±0.05 ±10 µV
Average Input Offset Drift (Note 3) ● ±0.01 ±0.05 ±0.01 ±0.05 µV/°C
Long Term Offset Voltage Drift 50 50 µV/√mo
Input Offset Current ±10 ±60 ±10 ±60 pA
Input Bias Current ±5 ±30 ±5 ±30 pA
Input Noise Voltage RS = 100Ω, 0.1Hz to 10Hz, TC2 2.0 2.0 µV
RS = 100Ω, 0.1Hz to 1Hz, TC2 0.7 0.7
Input Noise Current f = 10Hz (Note 4) 1.3 1.3 fA/√Hz
Common Mode Rejection Ratio VCM = 0V to 2.7V ● 106 130 106 130 dB
Power Supply Rejection Ratio VS = ±2.375V to ±16V ● 120 145 120 145 dB
Large-Signal Voltage Gain RL = 10kΩ, V
Maximum Output Voltage Swing RL = 10kΩ 0.15 to 4.85 0.15 to 4.85 V
= 100kΩ 0.02 to 4.97 0.02 to 4.97
R
L
Slew Rate RL = 10kΩ, CL = 50pF 1.5 1.5 V/µs
Gain Bandwidth Product 1.8 1.8 MHz
Supply Current No Load 0.4 1 0.4 1 mA
Internal Sampling Frequency 300 300 Hz
= 0.3V to 4.5V ● 115 180 115 180 dB
OUT
● 1.5 1.5
P-P
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
–
may cause destructive latch-up. It is recommended that no sources
V
operating from external supplies be applied prior to power-up of the
LTC1150.
+
or less than
Note 3: These parameters are guaranteed by design. Thermocouple effects
preclude measurement of these voltage levels in high-speed automatic test
systems. V
capability.
Note 4: Current Noise is calculated from the formula:
where q = 1.6 • 10
is measured to a limit determined by test equipment
OS
I
= √(2q • Ib)
N
–19
Coulomb.
1150fb
3
LTC1150
LTC1150 •TC02
100k
475k
TO X-Y
RECORDER
475k
FOR 1Hz NOISE BW, INCREASE ALL THE CAPACITORS BY A FACTOR OF 10
316k
0.1µF 0.1µF
0.1µF
158k
10Ω
LTC1150
+
–
LT1012
+
–
LTC1150 • TPC06
FREQUENCY (Hz)
0
GAIN (dB)
PHASE (DEGREES)
20
60
100
120
100 10k 100k 10M
–20
1k
1M
80
40
–40
180
160
120
80
60
200
100
140
220
VS = ± 15V
C
L
= 100pF
PIN 1 = –15V
PHASE
GAIN
TEST CIRCUITS
Offset Voltage Test Circuit
1M
+
2
3
V
–
LTC1150
+
V
7
6
OUTPUT
4
–
R
L
LTC1150 •TC01
1k
UW
TYPICAL PERFOR A CE CHARACTERISTICS
Supply Current vs Supply Voltage
1000
TA = 25°C
900
800
700
600
500
SUPPLY CURRENT (µA)
400
300
200
8
4
12
TOTAL SUPPLY VOLTAGE, V+ TO V– (V)
16
20
24
28
32
LTC1150 • TPC01
36
1400
VS = ± 15V
1200
1000
800
600
SUPPLY CURRENT (µA)
400
200
–55
53565
–25
AMBIENT TEMPERATURE (°C)
95 125
LTC1150 • TPC02
DC-10Hz Noise Test Circuit
Gain/Phase vs FrequencySupply Current vs Temperature
120
VS = ± 15V
= 100pF
C
L
100
80
60
40
GAIN (dB)
20
0
–20
–40
100 10k 100k 10M
GAIN
1k
FREQUENCY (Hz)
PHASE
1M
LTC1150 • TPC03
60
80
100
PHASE (DEGREES)
120
140
160
180
200
220
Output Short-Circuit Current vs
Supply Voltage
6
(mA)
4
OUT
2
0
–3
–6
–9
–12
SHORT-CIRCIUT OUTPUT CURRENT, I
–15
4
4
–
V
= V
OUT
I
SOURCE
+
V
= V
OUT
I
SINK
TOTAL SUPPLY VOLTAGE, V+ TO V– (V)
PIN 1 = OPEN
8
12
16
PIN 1 = OPEN
–
PIN 1 = V
PIN 1 = V
20
24
TA = 25°C
–
28
32
LTC1150 • TPC04
36
SET
1200
V
= ± 15V
S
= 25°C
T
A
1000
800
600
400
SUPPLY CURRENT (µA)
200
0
1k
10k 100k 1M
R
, PIN 1 TO V
SET
–
(Ω)
LTC1150 • TPC05
Gain/Phase vs FrequencySupply Current vs R
1150fb
UW
TYPICAL PERFOR A CE CHARACTERISTICS
LTC1150
Input Bias Current vs Supply
Voltage Gain/Phase vs Frequency
12
TA = 25°C
= OV
V
CM
10
8
6
4
INPUT BIAS CURRENT (pA)
2
0
0
± 4 ± 8
± 2 ± 6
SUPPLY VOLTAGE (V)
± 10
± 12
LTC1150 • TPC07
±14
±16
Input Bias Current vs Input
Common Mode Voltage Input Bias Current vs Temperature
40
30
20
10
0
–10
–20
INPUT BIAS CURRENT (pA)
–30
–40
–I
B
+I
B
–15 –10 –5
INPUT COMMON MODE VOLTAGE (V)
0
5
VS = ± 15V
= 25°C
T
A
10
LTC1150 • TPC10
15
Undistorted Output Swing vs
Frequency
30
25
20
15
10
OUTPUT VOLTAGE (Vp-p)
5
0
100 10k 100k 1M
–1000
–100
–10
INPUT BIAS CURRENT (pA)
–1
–50 –25
PIN 1 = FLOATING
1k
VCM = 0
= ± 15V
V
S
–I
B
0255075100 125
TEMPERATURE (°C)
–
PIN 1 = V
RL = 10k
= 100k
R
L
FREQUENCY (Hz)
+I
B
LTC1150 • TPC08
LTC1150 • TPC11
120
VS = ±2.5V
= 100pF
C
L
100
80
60
40
GAIN (dB)
20
0
–20
–40
100 10k 100k 10M
GAIN
1k
FREQUENCY (Hz)
Common Mode Input Range vs
Supply Voltage
15
TA = 25°C
10
5
0
–5
COMMON MODE RANGE (V)
–10
–15
0
±5 ±7.5 ±10
±2.5
SUPPLY VOLTAGE (V)
PHASE
1M
LTC1150 • TPC09
±12.5 ±15
LTC1150 • TPC12
60
80
100
PHASE (DEGREES)
120
140
160
180
200
220
CMRR vs Frequency
160
140
120
100
80
CMRR (dB)
60
40
20
0
10
1 100 1k 100k
FREQUENCY (Hz)
10k
LTC1150 • TPC13
PSRR vs Frequency
160
140
120
100
80
PSRR (dB)
60
40
20
0
1 100 1k 100k
POSITIVE SUPPLY, PIN 1 = OPEN
POSITIVE SUPPLY,
PIN 1 = V
NEGATIVE SUPPLY,
PIN 1 = OPEN
NEGATIVE SUPPLY, PIN 1 = V
10
FREQUENCY (Hz)
–
–
10k
LTC1150 • TPC14
Offset Voltage vs
Sampling Frequency
10
VA = ± 15V
T
= 25°C
A
8
6
4
OFFSET VOLTAGE (µV)
2
0
0
–
PIN 1 = V
1k
SAMPLING FREQUENCY, fS (Hz)
PIN 1 = OPEN
2k
LTC1150 • TPC15
3k
1150fb
5
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