LTC1051/LTC1053
Dual/Quad Precision
Zero-Drift Operational Amplifiers
With Internal Capacitors
DESCRIPTIO
The LTC
®
1051/LTC1053 are high performance, low cost
dual/quad zero-drift operational amplifiers. The unique
achievement of the LTC1051/LTC1053 is that they integrate
on chip the sample-and-hold capacitors usually required
externally by other chopper amplifiers. Further, the
LTC1051/LTC1053 offer better combined overall DC and
AC performance than is available from other chopper
stabilized amplifiers with or without internal sample/hold
capacitors.
The LTC1051/LTC1053 have an offset voltage of 0.5µV,
drift of 0.01µV/°C, DC to 10Hz, input noise voltage typically
1.5µV
P-P
and typical voltage gain of 140dB. The slew rate
of 4V/µs and gain bandwidth product of 2.5MHz are
achieved with only 1mA of supply current per op amp.
Overload recover times from positive and negative
saturation conditions are 1.5ms and 3ms respectively,
about a 100 or more times improvement over chopper
amplifiers using external capacitors.
The LTC1051 is available in an 8-lead standard plastic
dual-in-line package as well as a 16-pin SW package. The
LTC1053 is available in a standard 14-pin plastic package
and an 18-pin SO. The LTC1051/LTC1053 are plug in
replacements for most standard dual/quad op amps with
improved performance.
FEATURES
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Dual/Quad Low Cost Precision Op Amp
No External Components Required
Maximum Offset Voltage: 5µV
Maximum Offset Voltage Drift: 0.05µV/°C
Low Noise 1.5µV
P-P
(0.1Hz to 10Hz)
Minimum Voltage Gain: 120dB
Minimum PSRR: 120dB
Minimum CMRR: 114dB
Low Supply Current: 1mA/Op Amp
Single Supply Operation: 4.75V to 16V
Input Common Mode Range Includes Ground
Output Swings to Ground
Typical Overload Recovery Time: 3ms
Pin Compatible with Industry Standard Dual and
Quad Op Amps
APPLICATIO S
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Thermocouple Amplifiers
Electronic Scales
Medical Instrumentation
Strain Gauge Amplifiers
High Resolution Data Acquisition
DC Accurate R C Active Filters
, LTC and LT are registered trademarks of Linear Technology Corporation.
TYPICAL APPLICATIO
R1
5V
R2
2
High Performance Low Cost Instrumentation Amplifier
120
R2
VOLTAGE NOISE DENSITY (nV√Hz)
LTC1051 Noise Spectrum
100
–
+
8
1
R1
6
V
IN
3
1/2
LTC1051
80
–
1/2
LTC1051
7
R1 = 499Ω, 0.1%
R2 = 100k, 0.1%
GAIN = 201
MEASURED CMRR ~ 120dB AT DC
MEASURED INPUT V
OS
3µV
MEASURED INPUT NOISE 2µV
P-P
(DC – 10Hz)
V
IN
5
60
+
4
– 5V
40
20
1051/53 TA01a
10
U
U
U
100
1k
FREQUENCY (Hz)
10k
1051/53 TA01b
10513fa
1
LTC1051/LTC1053
ABSOLUTE
AXI U
RATI GS
Total Supply Voltage (V
+
to V
–
) ............................ 16.5V
Input Voltage ........................ (V
+
+ 0.3V) to (V
–
– 0.3V)
Output Short-Circuit Duration .......................... Indefinite
PACKAGE/ORDER I FOR ATIO
TOP VIEW
OUT A 1
– IN A 2
+IN A 3
V
–
4
N8 PACKAGE
8-LEAD PDIP
8
7
6
5
V
+
OUT B
–IN B
+IN B
ORDER PART
NUMBER
LTC1051CN8
LTC1051MJ8
LTC1051CJ8
LTC1051AMJ8
LTC1051ACJ8
ORDER PART
NUMBER
LTC1051CSW
T
JMAX
= 150°C,
θ
JA
= 110°C/W
J8 PACKAGE
8-LEAD CERDIP
OBSOLETE PACKAGE
Consider the N8 Package as an Alternate Source
TOP VIEW
NC 1
NC 2
OUT A 3
–IN A 4
+IN A 5
V
–
6
NC 7
NC 8
SW PACKAGE
16-LEAD PLASTIC SO
16 NC
15 NC
14
V
+
13 OUT B
12 –IN B
11 +IN B
10 NC
9
NC
T
JMAX
= 150°C,
θ
JA
= 90°C/W
Consult LTC Marketing for parts specified with wider operating temperature ranges.
ELECTRICAL CHARACTERISTICS
PARAMETER
Input Offset Voltage
Average Input Offset Drift
Long Term Offset Drift
Input Bias Current
CONDITIONS
The
●
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
S
=
±5V
unless otherwise noted.
LTC1051/LTC1053
MIN
TYP
MAX
±0.5
●
LTC1051C/LTC1053C
Input Offset Current
Input Noise Voltage (Note 2)
(All Grades)
R
S
= 100Ω, DC to 10Hz
R
S
= 100Ω, DC to 1Hz
2
U
U
W
W W
U
W
(Note 1)
Operating Temperature Range
LTC1051M, LTC1051AM
(OBSOLETE)
..
–55°C to 125°C
LTC1051C/LTC1053C ......................... – 40°C to 85°C
Storage Temperature Range ................. – 65°C to 150°C
Lead Temperature (Soldering, 10 sec).................. 300°C
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
14 OUT D
13 – IN D
12 +IN D
11 V
–
10 +IN C
9
8
– IN C
OUT C
ORDER PART
NUMBER
LTC1053CN
T
JMAX
= 150°C,
θ
JA
= 65°C/W
TOP VIEW
NC 1
OUT A 2
–IN A 3
+IN A 4
V
+
5
18 NC
17 OUT D
16 –IN D
15 +IN D
14 V
–
13 +IN C
12 –IN C
11 OUT C
10 NC
SW PACKAGE
18-LEAD PLASTIC SO
ORDER PART
NUMBER
LTC1053CSW
+IN B 6
–IN B 7
OUT B 8
NC 9
T
JMAX
= 150°C,
θ
JA
= 85°C/W
MIN
LTC1051A
TYP
±0.5
±0.0
50
±15
±30
1.5
0.4
MAX
±5
±0.05
±50
±100
±100
±150
2
UNITS
µV
µV/°C
nV/√Mo
pA
pA
pA
pA
µV
P-P
µV
P-P
10513fa
±5
±0.05
±65
±135
±125
±175
±0.0
50
±15
●
±30
●
1.5
0.4
LTC1051/LTC1053
ELECTRICAL CHARACTERISTICS
PARAMETER
Input Noise Current
Common Mode Rejection Ratio, CMRR
Differential CMRR
LTC1051, LTC1053 (Note 3)
Power Supply Rejection Ratio
Large Signal Voltage Gain
Maximum Output Voltage Swing
Slew Rate
Gain Bandwidth Product
Supply Current/Op Amp
Internal Sampling Frequency
No Load
CONDITIONS
f = 10Hz
V
CM
= V
–
to 2.7V
The
●
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
S
=
±5V
unless otherwise noted.
LTC1051/LTC1053
MIN
TYP
MAX
2.2
●
MIN
114
110
112
LTC1051A
TYP
2.2
130
MAX
UNITS
fA/√Hz
dB
dB
dB
106
100
112
130
V
CM
= V
–
to 2.7V
V
S
=
±2.375V
to
±8V
R
L
= 10k, V
OUT
=
±4V
R
L
= 10k
R
L
= 100k
R
L
= 10k, C
L
= 50pF
●
●
●
116
116
±4.5
±4.5
140
160
±4.85
±4.95
4
2.5
1
2
2.5
120
120
±4.7
140
160
±4.85
±4.95
4
2.5
1
3.3
2
2.5
dB
dB
V
V
V/µs
MHz
mA
mA
kHz
●
3.3
The
●
denotes the specifications which apply over the full operating temperature range, otherwise specifications are at T
A
= 25°C.
V
S
=
±5V
unless otherwise noted.V
S
= 5V, GND unless otherwise noted.
PARAMETER
Input Offset Voltage
Input Offset Drift
Input Bias Current
Input Offset Current
Input Noise Voltage
Supply Current/Op Amp
DC to 10Hz
No Load
●
CONDITIONS
LTC1051A/LTC1051/LTC1053
MIN
TYP
MAX
±0.5
±0.01
±10
±20
1.8
1.5
±5
±0.05
±50
±80
UNITS
µV
µV/°C
pA
pA
µV
P-P
mA
Note 1:
Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2:
For guaranteed noise specification contact LTC Marketing.
Note 3:
Differential CMRR for the LTC1053 is measured between
amplifiers A and D, and amplifiers B and C.
10513fa
3
LTC1051/LTC1053
TYPICAL PERFOR A CE CHARACTERISTICS
Common Mode Input Range vs
Supply Voltage
8
SAMPLING FREQUENCY, f
S
(kHz)
4
2
0
–2
–4
–6
–8
0
1
2
3
4
5
6
SUPPLY VOLTAGE (±V)
7
8
V
CM
= V
–
3.5
SAMPLING FREQUENCY, f
S
(kHz)
6
COMMON MODE RANGE (V)
Supply Current vs Supply Voltage
Per Op Amp
1.50
T
A
= 25°C
1.25
SUPPLY CURRENT, I
S
(mA)
SUPPLY CURRENT, I
S
(mA)
1.00
0.75
0.50
0.25
0
2.0
1.8
1.6
VOLTAGE GAIN (dB)
4
14
8
10
12
6
+
TO V
–
(V)
TOTAL SUPPLY VOLTAGE V
Output Short-Circuit Current vs
Supply Voltage
SHORT-CIRCUIT OUTPUT CURRENT, I
OUT
(mA)
6
V
OUT
= V
4
I
SOURCE
2
–
VOLTAGE GAIN (dB)
CMRR (dB)
0
– 10
– 20
I
SINK
– 30
4
14
16
8
10
12
6
+
TO V
–
(V)
TOTAL SUPPLY VOLTAGE, V
1051/53 G07
V
OUT
4
U W
1051/53 G01
Sampling Frequency vs Supply
Voltage
4.0
T
A
= 25°C
Sampling Frequency vs
Temperature
5
V
S
=
±5V
4
3.0
3
2
2.5
1
2.0
4
14
16
6
8
10
12
TOTAL SUPPLY VOLTAGE, V
+
TO V
–
(V)
1051/53 G02
–50
50
25
0
75 100
–25
AMBIENT TEMPERATURE, T
A
(°C)
125
1051/53 G03
Supply Current vs Temperature
Per Op Amp
V
S
=
±5V
120
100
80
60
40
20
0
– 20
50
25
75 100
0
–25
AMBIENT TEMPERATURE, T
A
(°C)
125
Gain/Phase vs Frequency
60
V
S
=
±5V
C
L
= 100pF 80
R
L
≥
1k
T
A
= 25°C 100
120
140
160
180
200
10k
100k
FREQUENCY (Hz)
220
10M
1051/53 G06
PHASE SHIFT (DEGREES)
1.4
1.2
1.0
0.8
0.6
0.4
0.2
16
0
–50
– 40
100
1k
1M
1051/53 G04
1051/53 G05
CMRR vs Frequency
160
140
120
100
80
60
40
Gain/Phase vs Frequency
120
100
80
60
40
20
0
– 60
V
S
=
±2.5V
C
L
= 100pF – 80
R
L
≥
1k
T
A
= 25°C –100
–120
–140
–160
–180
–200
1k
10k
100k
FREQUENCY (Hz)
1M
–220
10M
1051/53 G09
PHASE SHIFT (DEGREES)
= V
+
20
0
1
V
S
=
±5V
T
A
= 25°C
AC COMMON MODE IN = 0.5V
P-P
10
100
1k
FREQUENCY (Hz)
10k
100k
– 20
– 40
100
1051/53 G08
10513fa
LTC1051/LTC1053
TYPICAL PERFOR A CE CHARACTERISTICS
Overload Recovery
400mV
INPUT
0
OUTPUT
50mV
/DIV
0
OUTPUT
– 5V
INPUT
100mV
A
V
= –100
V
S
=
±5V
LTC1051/LTC1053 DC to 10Hz Noise
V
S
=
±5V
T
A
= 25°C
1µV
TEST CIRCUITS
Electrical Characteristics Test Circuit
1M
V
+
1k
2
100k
–
+
8
6
OUTPUT
3
1/2
LTC1051
4
V
–
U W
0.5ms
R
L
Small Signal Transient Response
Large Signal Transient Response
OUTPUT
2V/DIV
INPUT
6V
2µs/DIV
A
V
= 1, R
L
= 10k, C
L
= 100pF
V
S
=
±5V,
T
A
= 25°C
1051/53 G10
1051/53 G11
2µs/DIV
A
V
= 1, R
L
= 10k, C
L
= 100pF
V
S
=
±5V,
T
A
= 25°C
1051/53 G12
1.4µV
P-P
10 SEC
1 SEC
DC 10Hz Noise Test Circuit
475k
0.01µF
10Ω
2
–
1/2
LTC1051
6
158k
316k
475k
–
LT1012
TO X-Y
RECORDER
3
+
0.1µF
0.01µF
+
FOR 1Hz NOISE BW INCREASE ALL THE CAPACITORS BY A FACTOR OF 10.
1051/53 TC01
10513fa
5
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