LTC1049CH [Linear]
IC OP-AMP, 10 uV OFFSET-MAX, 0.8 MHz BAND WIDTH, MBCY8, Operational Amplifier;
| 型号： | LTC1049CH |
| 厂家： | 
Linear |
| 描述： | IC OP-AMP, 10 uV OFFSET-MAX, 0.8 MHz BAND WIDTH, MBCY8, Operational Amplifier 运算放大器 |
| 文件： | 总12页 (文件大小：152K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
LTC1049
Low Power Zero-Drift
Operational Amplifier
with Internal Capacitors
U
FEATURES
DESCRIPTIO
TheLTC®1049isahighperformance, lowpowerzero-drift
operationalamplifier.Thetwosample-and-holdcapacitors
usually required externally by other chopper stabilized
amplifiersareintegratedonthechip.Further,theLTC1049
offers superior DC and AC performance with a nominal
supply current of only 200µA.
■
Low Supply Current: 200µA
■
No External Components Required
■
Maximum Offset Voltage: 10µV
■
Maximum Offset Voltage Drift: 0.1µV/°C
■
Single Supply Operation: 4.75V to 16V
■
Input Common Mode Range Includes Ground
■
Output Swings to Ground
The LTC1049 has a typical offset voltage of 2µV, drift of
0.02µV/°C, 0.1Hz to 10Hz input noise voltage of 3µVP-P
and typical voltage gain of 160dB. The slew rate is 0.8V/µs
with a gain bandwidth product of 0.8MHz.
■
Typical Overload Recovery Time: 6ms
■
Available in 8-Pin SO and PDIP Packages
U
APPLICATIO S
Overload recovery time from a saturation condition is
6ms, a significant improvement over chopper amplifiers
using external capacitors.
■
4mA to 20mA Current Loops
■
Thermocouple Amplifiers
■
Electronic Scales
The LTC1049 is available in a standard 8-pin plastic dual
in line, as well as an 8-pin SO package. The LTC1049 can
be a plug-in replacement for most standard op amps with
improvedDCperformanceandsubstantialpowersavings.
■
Medical Instrumentation
■
Strain Gauge Amplifiers
■
High Resolution Data Acquisition
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
U
TYPICAL APPLICATIO
Single Supply Thermocouple Amplifier
0.068µF
V
= 5V
IN
246k
1k
7
2
3
–
6
2
V
OUT
= 0V TO 4V
LTC1049
FOR 0°C TO 400°C
7
K
+
–
+
4
LT®1025A
0.1µF
–
GND
4
R
TYPE K
5
SUPPLY CURRENT = 280µA
LTC1049 • TA01
1049fb
1
LTC1049
W W U W
ABSOLUTE AXI U RATI GS
(Note 1)
Total Supply Voltage (V+ to V–)............................... 18V Operating Temperature Range .................–40°C to 85°C
Input Voltage (Note 2) .......... (V+ + 0.3V) to (V– – 0.3V) Storage Temperature Range ................. –65°C to 150°C
Output Short-Circuit Duration.......................... Indefinite Lead Temperature (Soldering, 10 sec).................. 300°C
U W
U
PACKAGE/ORDER I FOR ATIO
TOP VIEW
ORDER PART
ORDER PART
NUMBER
NC
–IN
+IN
1
2
3
4
NC
8
7
6
5
NUMBER
TOP VIEW
NC
–IN
+IN
NC
+
V
+
1
2
3
4
8
7
6
5
V
LTC1049CN8
LTC1049CS8
–
+
OUT
NC
OUT
NC
–
V
–
V
N8 PACKAGE 8-LEAD PDIP
= 110°C, θ = 130°C/W
T
S8 PART MARKING
1049
JMAX
JA
S8 PACKAGE
J8 PACKAGE 8-LEAD CERDIP
= 150°C, θ = 100°C/W
8-LEAD PLASTIC SO
LTC1049CJ8
T
JMAX
JA
T
= 110°C, θ = 200°C/W
JA
JMAX
OBSOLETE PACKAGE
Consider the N8 Package as an Alternate Source
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.
ELECTRICAL CHARACTERISTICS
The
●
denotes specifications which apply over the full operating tempera-
ture range, otherwise specifications are at T = 25°C. V = ±5V, unless noted.
A
S
PARAMETER
CONDITIONS
(Note 3)
(Note 3)
MIN
TYP
±2
±0.02
50
MAX
±10
±0.1
UNITS
µV
µV/°C
nV√mo
pA
pA
pA
pA
µVP-P
µVP-P
Input Offset Voltage
Average Input Offset Drift
Long Term Offset Voltage Drift
Input Offset Current
●
±30
±100
±150
±50
±150
●
●
Input Bias Current
Input Noise Voltage
±15
0.1Hz to 10Hz
0.1Hz to 1Hz
3
1
Input Noise Current
f = 10Hz (Note 4)
VCM = V– to 2.7V
VS = ±2.375V to ±8V
RL = 100kΩ, VOUT = ±4.75V
RL = 10kΩ
2
130
130
160
–4.9/4.2
fA√Hz
dB
dB
dB
V
Common Mode Rejection Ratio
Power Supply Rejection Ratio
Large-Signal Voltage Gain
Maximum Output Voltage Swing
●
●
●
110
110
130
●
●
–4.6/3.2
V
RL = 100kΩ
RL = 10kΩ, CL = 50pF
±4.9
±4.97
0.8
0.8
V
V/µs
MHz
Slew Rate
Gain Bandwidth Product
Supply Current
No Load
200
330
495
µA
µA
●
Internal Sampling Frequency
700
Hz
1049fb
2
LTC1049
ELECTRICAL CHARACTERISTICS
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 3: These parameters are guaranteed by design. Thermocouple effects
preclude measurement of these voltage levels in high speed automatic test
systems. V is measured to a limit determined by test equipment
OS
capability.
+
Note 2: Connecting any terminal to voltages greater than V or less than
Note 4: Current Noise is calculated from the formula:
–
V may cause destructive latch-up. It is recommended that no sources
I = √(2q • I )
where q = 1.6 • 10 Coulomb.
N
b
operating from external supplies be applied prior to power-up of the
LTC1049.
–19
U W
TYPICAL PERFOR A CE CHARACTERISTICS
Common Mode Input Range vs
Supply Voltage
Voltage Noise vs Frequency
Gain/Phase vs Frequency
140
60
8
6
120
100
80
–
V = ± 5V
S
V
CM
= V
NO LOAD
80
120
100
100
120
140
160
180
200
220
4
PHASE
2
60
0
40
80
60
GAIN
20
–2
–4
–6
–8
0
40
20
–20
–40
4
5
0
1
2
3
6
7
8
10
100
1k
10k
100k
100
1k
10k
100k
1M
10M
FREQUENCY (Hz)
SUPPLY VOLTAGE (±V)
FREQUENCY (Hz)
LTC1049 • TPC03
LTC1049 • TPC02
LTC1049 • TP01
Output Short-Circuit Current vs
Supply Voltage
Supply Current vs Supply Voltage
Supply Current vs Temperature
500
400
300
200
100
0
1.2
0.8
0.4
0
400
340
280
220
160
100
≈
≈
–3
–6
–9
5
6
7
8
9
10 11 12 13 14 15
–50
0
25
50
75
125
–25
100
4
6
8
10
12
14
–
16
+
TOTAL SUPPLY VOLTAGE (V)
TEMPERATURE (°C)
TOTAL SUPPLY VOLTAGE, V TO V (V)
LTC1049 • TPC04
LTC1049 • TPC05
LTC1049 • TPC06
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3
LTC1049
U W
TYPICAL PERFOR A CE CHARACTERISTICS
Sampling Frequency vs
Supply Voltage
Sampling Frequency vs
Temperature
CMRR vs Frequency
5
4
3
2
1
0
3000
2500
2000
1500
160
140
120
100
80
V
= ± 5V
V
= ± 5V
S
S
60
40
20
1000
0
–50
0
25
50
75 100 125
4
6
8
10
12
14
–
16
–25
1
10
100
1k
10k
100k
+
TOTAL SUPPLY VOLTAGE, V TO V (V)
AMBIENT TEMPERATURE (°C)
FREQUENCY (Hz)
LTC1049 • TPC09
LTC1049 • TPC08
LTC1049 • TPC07
Small-Signal Transient
Response
Large-Signal Transient
Response
Overload Recovery
400mV
0.2V/DIV
2V/DIV
100mV
STEP
6V
STEP
0V
0V
1µs/DIV
5µs/DIV
–5V
AV = –100
VS = ± 5V
0.5ms/DIV
AV = 1
AV = 1
RL = 10k
CL = 50pF
RL = 10k
CL = 50pF
VS = ±5V
LTC1049 • TPC11
LTC1049 • TPC12
LTC1049 • TPC10
VS = ±5V
LTC1049 DC to 1Hz Noise
V
= ± 5V
S
1Hz NOISE
1µV/DIV
NOISE VOLTAGE
1µV/DIV
10s/DIV
LTC1049 • TPC13
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4
LTC1049
U W
TYPICAL PERFOR A CE CHARACTERISTICS
LTC1049 DC to 10Hz Noise
V
= ± 5V
S
NOISE VOLTAGE
10Hz NOISE
1µV/DIV
1µV/DIV
1s/DIV
LTC1049•TPC14
TEST CIRCUITS
Electrical Characteristics Test Circuit
DC to 10Hz and DC to 1Hz Noise Test Circuit
140
8
–
V
= V
CM
6
120
100
4
2
0
80
60
–2
–4
–6
–8
40
20
4
5
10
100
1k
10k
100k
0
1
2
3
6
7
8
SUPPLY VOLTAGE (±V)
FREQUENCY (Hz)
LTC1049 • TPC02
LTC1049 • TP01
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5
LTC1049
W U U
U
APPLICATIO S I FOR ATIO
ACHIEVING PICOAMPERE/MICROVOLT
PERFORMANCE
Minimizing thermal EMF-induced errors is possible if
judicious attention is given to circuit board layout and
component selection. It is good practice to minimize the
number of junctions in the amplifier’s input signal path.
Avoid connectors, sockets, switches, and relays where
possible. In instances where this is not possible, attempt
to balance the number and type of junctions so that
differential cancellation occurs. Doing this may involve
deliberately introducing junctions to offset unavoidable
junctions.
Picoamperes
In order to realize the picoampere level of accuracy of the
LTC1049, proper care must be exercised. Leakage
currents in circuitry external to the amplifier can signifi-
cantlydegradeperformance.Highqualityinsulationshould
be used (e.g., Teflon™, Kel-F); cleaning of all insulating
surfacestoremovefluxesandotherresidueswillprobably
be necessary—particularly for high temperature perfor-
mance. Surface coating may be necessary to provide a
moisture barrier in high humidity environments.
PACKAGE-INDUCED OFFSET VOLTAGE
Package-induced thermal EMF effects are another impor-
tant source of errors. It arises at the copper/kovar
junctions formed when wire or printed circuit traces
contact a package lead. Like all the previously mentioned
thermal EMF effects, it is outside the LTC1049’s offset
nulling loop and cannot be cancelled. The input offset
voltage specification of the LTC1049 is actually set by the
package-induced warm-up drift rather than by the circuit
itself. The thermal time constant ranges from 0.5 to 3
minutes, depending on package type.
Board leakage can be minimized by encircling the input
connections with a guard ring operated at a potential close
to that of the inputs: in inverting configurations, the guard
ring should be tied to ground; in noninverting connec-
tions, to the inverting input. Guarding both sides of the
printed circuit board is required. Bulk leakage reduction
depends on the guard ring width.
Microvolts
ThermocoupleeffectsmustbeconsiderediftheLTC1049’s
ultralow drift is to be fully utilized. Any connection of
dissimilar metals forms a thermoelectric junction produc-
ing an electric potential which varies with temperature
(Seebeck effect). As temperature sensors, thermocouples
exploitthisphenomenontoproduceusefulinformation. In
low drift amplifier circuits the effect is a primary source of
error.
LOW SUPPLY OPERATION
The minimum supply for proper operation of the LTC1049
is typically below 4.0V (±2.0V). In single supply applica-
tions, PSRR is guaranteed down to 4.7V (±2.35V) to
ensure proper operation down to the minimum TTL
specified voltage of 4.75V.
Connectors, switches, relay contacts, sockets, resistors,
solder, and even copper wire are all candidates for thermal
EMF generation. Junctions of copper wire from different
manufacturerscangeneratethermalEMFsof200nV/°C—
twicethemaximumdriftspecificationoftheLTC1049. The
copper/kovarjunction,formedwhenwireorprintedcircuit
traces contact a package lead, has a thermal EMF of
approximately 35µV/°C—300 times the maximum drift
specification of the LTC1049.
PIN COMPATIBILITY
The LTC1049 is pin compatible with the 8-pin versions of
7650, 7652 and other chopper-stabilized amplifiers. The
7650 and 7652 require the use of two external capacitors
connected to Pins 1 and 8 which are not needed for the
LTC1049. Pins 1, 5, and 8 of the LTC1049 are not con-
nected internally; thus, the LTC1049 can be a direct plug-
in for the 7650 and 7652, even if the two capacitors are left
on the circuit board.
1049fb
6
LTC1049
U
TYPICAL APPLICATIO S
Low Power, Low Hold Step Sample-and-Hold
5V
13
LTC201
5V
7
2
3
4.5
–
6
V
OUT
LTC1049
3
2
V
+
IN
4
DROOP ≤ 1mV/s
HOLD STEP ≤ 20µV
0.47µF
MYLAR
1
I
= 250µA TYP
S
S/H
LTC1049 • TA02
1049fb
7
LTC1049
U
TYPICAL APPLICATIO S
Low Power, Single Supply, Low Offset Instrumentation Amp
5V
198k
2k
2k
198k
2
3
2
7
7
–
–
6
6
V
OUT
LTC1049
LTC1049
3
+
+
4
4
+ V
IN
– V
IN
GAIN = 100
= 400µA
I
S
CMRR ≥ 60dB, WITH 0.1% RESISTORS (RESISTORS LIMITED)
LTC1049 • TA03
1049fb
8
LTC1049
U
PACKAGE DESCRIPTIO
J8 Package
8-Lead CERDIP (Narrow .300 Inch, Hermetic)
(Reference LTC DWG # 05-08-1110)
.405
(10.287)
MAX
CORNER LEADS OPTION
(4 PLCS)
.005
(0.127)
MIN
6
5
4
8
7
.023 – .045
(0.584 – 1.143)
HALF LEAD
OPTION
.025
.220 – .310
(5.588 – 7.874)
.045 – .068
(0.635)
RAD TYP
(1.143 – 1.650)
FULL LEAD
OPTION
1
2
3
.200
(5.080)
MAX
.300 BSC
(7.62 BSC)
.015 – .060
(0.381 – 1.524)
.008 – .018
(0.203 – 0.457)
0° – 15°
.045 – .065
(1.143 – 1.651)
.125
3.175
MIN
NOTE: LEAD DIMENSIONS APPLY TO SOLDER DIP/PLATE
OR TIN PLATE LEADS
.014 – .026
(0.360 – 0.660)
.100
(2.54)
BSC
J8 0801
OBSOLETE PACKAGE
1049fb
9
LTC1049
U
PACKAGE DESCRIPTIO
N8 Package
8-Lead PDIP (Narrow .300 Inch)
(Reference LTC DWG # 05-08-1510)
.400*
(10.160)
MAX
8
7
6
5
4
.255 ± .015*
(6.477 ± 0.381)
1
2
3
.130 ± .005
.300 – .325
.045 – .065
(3.302 ± 0.127)
(1.143 – 1.651)
(7.620 – 8.255)
.065
(1.651)
TYP
.008 – .015
(0.203 – 0.381)
.120
.020
(0.508)
MIN
(3.048)
MIN
+.035
.325
–.015
.018 ± .003
(0.457 ± 0.076)
.100
(2.54)
BSC
+0.889
8.255
(
)
N8 1002
–0.381
NOTE:
INCHES
1. DIMENSIONS ARE
MILLIMETERS
*THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS.
MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED .010 INCH (0.254mm)
1049fb
10
LTC1049
U
PACKAGE DESCRIPTIO
S8 Package
8-Lead Plastic Small Outline (Narrow .150 Inch)
(Reference LTC DWG # 05-08-1610)
.189 – .197
(4.801 – 5.004)
.045
±.005
NOTE 3
.050 BSC
7
5
8
6
.245
MIN
.160
±
.005
.150 – .157
(3.810 – 3.988)
NOTE 3
.228 – .244
(5.791 – 6.197)
.030
±
.005
TYP
1
3
4
2
RECOMMENDED SOLDER PAD LAYOUT
.010 – .020
(0.254 – 0.508)
× 45°
.053 – .069
(1.346 – 1.752)
.004 – .010
(0.101 – 0.254)
.008 – .010
(0.203 – 0.254)
0°– 8° TYP
.016 – .050
(0.406 – 1.270)
.050
(1.270)
BSC
.014 – .019
(0.355 – 0.483)
TYP
NOTE:
INCHES
1. DIMENSIONS IN
(MILLIMETERS)
2. DRAWING NOT TO SCALE
3. THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS.
MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED .006" (0.15mm)
SO8 0303
1049fb
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen-
tationthattheinterconnectionofitscircuitsasdescribedhereinwillnotinfringeonexistingpatentrights.
11
LTC1049
U
TYPICAL APPLICATIO
Thermocouple-Based Temperature to Frequency Converter
6V
0.02µF
6V
TYPE K
Q1
2N3904
THERMO-
COUPLE
+
V
NC
10k
100k
K
–
LT1025
–
+
1M
Q2
2N3906
LTC1049
–
R
l
l
l
3
GND
OUTPUT
100k
1
2
+
0 – 100°C =
0 – 1kHz
C1
100pF
6.81k*
1.5k
C3
0.47µF
C4
300pF
240k
6V
100°C
TRIM
+
LT1004 – 1.2
6.8µF
9
16
*IRC/TRW–MTR–5/+120ppm
†POLYSTYRENE
15
11
14
10
C2
390pF
S4
S1
†
= 74C14
I
= 360µA
S
S2
S3
SUPPLY RANGE = 4.5V to 10V
6
7
LTC201
2
3
1
8
LTC1049 • TA04
1049fb
LT 0406 REV B • PRINTED IN USA
12 LinearTechnology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
●
●
(408) 432-1900 FAX: (408) 434-0507 www.linear.com
© LINEAR TECHNOLOGY CORPORATION 1991
相关型号：
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LTC1049 - Low Power Zero-Drift Operational Amplifier with Internal Capacitors; Package: SO; Pins: 8; Temperature Range: 0°C to 70°C
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