LTC1049CS8#TRPBF [Linear]
LTC1049 - Low Power Zero-Drift Operational Amplifier with Internal Capacitors; Package: SO; Pins: 8; Temperature Range: 0°C to 70°C;
| 型号： | LTC1049CS8#TRPBF |
| 厂家： | 
Linear |
| 描述： | LTC1049 - Low Power Zero-Drift Operational Amplifier with Internal Capacitors; Package: SO; Pins: 8; Temperature Range: 0°C to 70°C 放大器 光电二极管 |
| 文件： | 总12页 (文件大小：197K) |
| 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
DescripTion
The LTC®1049 is a high performance, low power zero-drift
operationalamplifier.Thetwosample-and-holdcapacitors
usually required externally by other chopper stabilized
amplifiers are integrated on the chip. Further, the LTC1049
offers superior DC and AC performance with a nominal
supply current of only 200µA.
FeaTures
n
Low Supply Current: 200µA
n
No External Components Required
n
Maximum Offset Voltage: 10µV
n
Maximum Offset Voltage Drift: 0.1µV/°C
n
Single Supply Operation: 4.75V to 16V
n
Input Common Mode Range Includes Ground
n
Output Swings to Ground
Typical Overload Recovery Time: 6ms
The LTC1049 has a typical offset voltage of 2µV, drift of
n
0.02µV/°C, 0.1Hz to 10Hz input noise voltage of 3µV
P-P
n
Available in 8-Pin SO and PDIP Packages
and typical voltage gain of 160dB. The slew rate is 0.8V/µs
with a gain bandwidth product of 0.8MHz.
applicaTions
Overload recovery time from a saturation condition is
6ms, a significant improvement over chopper amplifiers
using external capacitors.
n
4mA to 20mA Current Loops
n
Thermocouple Amplifiers
n
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.
n
Medical Instrumentation
n
Strain Gauge Amplifiers
n
High Resolution Data Acquisition
L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
Typical applicaTion
Single Supply Thermocouple Amplifier
0.068µF
V
= 5V
IN
246k
1k
7
2
3
–
6
2
V
= 0V TO 4V
OUT
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
absoluTe maximum raTings (Note 1)
+
–
Total Supply Voltage (V to V ) ................................18V
Operating Temperature Range .................–40°C to 85°C
Storage Temperature Range ..................–65°C to 150°C
Lead Temperature (Soldering, 10 sec)...................300°C
+
–
Input Voltage (Note 2)............(V + 0.3V) to (V – 0.3V)
Output Short-Circuit Duration.......................... Indefinite
package/orDer inFormaTion
TOP VIEW
ORDER PART
ORDER PART
NC
–IN
+IN
1
2
3
4
NC
8
7
6
5
NUMBER
NUMBER
TOP VIEW
+
V
NC
–IN
+IN
1
2
3
4
8
7
6
5
NC
LTC1049CN8
LTC1049CS8
–
+
OUT
NC
+
V
–
V
OUT
NC
–
N8 PACKAGE 8-LEAD PDIP
= 110°C, θ = 130°C/W
V
T
S8 PART MARKING
1049
JMAX
JA
S8 PACKAGE
8-LEAD PLASTIC SO
J8 PACKAGE 8-LEAD CERDIP
= 150°C, θ = 100°C/W
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 l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VS = 5V, unless noted.
PARAMETER
CONDITIONS
(Note 3)
MIN
TYP
2
MAX
10
UNITS
µV
Input Offset Voltage
Average Input Offset Drift
Long Term Offset Voltage Drift
Input Offset Current
l
(Note 3)
0.02
50
0.1
µV/°C
nV√mo
30
100
150
pA
pA
l
l
Input Bias Current
Input Noise Voltage
15
50
150
pA
pA
0.1Hz to 10Hz
0.1Hz to 1Hz
3
1
µVP-P
µVP-P
Input Noise Current
f = 10Hz (Note 4)
2
130
fA√Hz
dB
–
l
l
l
Common Mode Rejection Ratio
Power Supply Rejection Ratio
Large-Signal Voltage Gain
Maximum Output Voltage Swing
V
= V to 2.7V
110
110
130
CM
V = 2.375V to 8V
S
130
dB
R = 100kΩ, V
=
4.75V
160
dB
L
OUT
R = 10kΩ
L
–4.9/4.2
V
V
l
l
–4.6/3.2
4.9
R = 100kΩ
L
4.97
0.8
V
V/µs
MHz
Slew Rate
R = 10kΩ, C = 50pF
L
L
Gain Bandwidth Product
Supply Current
0.8
No Load
200
330
495
µA
µA
l
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
Typical perFormance characTerisTics
Common Mode Input Range vs
Supply Voltage
Voltage Noise vs Frequency
Gain/Phase vs Frequency
140
60
120
100
80
8
6
–
V
= ±±V
S
V
= V
CM
NO LOAD
80
120
100
100
120
140
160
180
200
220
4
PHASE
60
2
40
80
60
0
GAIN
20
–2
–4
–6
–8
0
40
20
–20
–40
10
100
1k
10k
100k
4
5
0
1
2
3
6
7
8
100
1k
10k
100k
1M
10M
FREQUENCY (Hz)
SUPPLY VOLTAGE ( Vꢀ
FREQUENCY (Hz)
LTC1049 • TPC03
LTC1049 • TP01
LTC1049 • TPC02
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
4
6
8
10
12
14
–
16
–50
0
25
50
75 100 125
–25
+
TOTAL SUPPLY VOLTAGE (V)
TOTAL SUPPLY VOLTAGE, V TO V (V)
TEMPERATURE (°C)
LTC1049 • TPC04
LTC1049 • TPC06
LTC1049 • TPC05
1049fb
3
LTC1049
Typical perFormance characTerisTics
Sampling Frequency vs
Supply Voltage
Sampling Frequency vs
Temperature
CMRR vs Frequency
5
4
3
2
1
0
160
140
120
100
80
3000
2500
2000
1500
V
= 5V
V
S
= ±±V
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 • TPC07
LTC1049 • TPC08
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
A
V
= –100
0.5ms/DIV
A
R
C
V
= 1
= 10k
= 50pF
A
R
C
V
= 1
V
V
S
V
=
5V
= 10k
= 50pF
L
L
S
L
L
S
=
5V
= 5V
LTC1049 • TPC10
LTC1049 • TPC11
LTC1049 • TPC12
LTC1049 DC to 1Hz Noise
V
= ±±V
S
1Hz NOISE
1µV/DIV
NOISE VOLTAGE
1µV/DIV
10s/DIV
LTC1049 • TPC13
1049fb
4
LTC1049
Typical perFormance characTerisTics
LTC1049 DC to 10Hz Noise
V
= ±±V
S
NOISE VOLTAGE
1µV/DIV
10Hz NOISE
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
0
1
2
3
6
7
8
10
100
1k
10k
100k
SUPPLY VOLTAGE ( Vꢀ
FREQUENCY (Hz)
LTC1049 • TPC02
LTC1049 • TP01
1049fb
5
LTC1049
applicaTions inFormaTion
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.Ininstanceswherethisisnotpossible,attemptto
balancethenumberandtypeofjunctionssothatdifferential
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
important source of errors. It arises at the copper/kovar
junctionsformedwhenwireorprintedcircuittracescontact
a package lead. Like all the previously mentioned thermal
EMF effects, it is outside the LTC1049’s offset nulling loop
andcannotbecancelled.Theinputoffsetvoltagespecifica-
tion 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
connectionswithaguardringoperatedatapotentialclose
to that of the inputs: in inverting configurations, the guard
ringshouldbetiedtoground;innoninvertingconnections,
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 dis-
similarmetalsformsathermoelectricjunctionproducingan
electric potential which varies with temperature (Seebeck
effect).Astemperaturesensors,thermocouplesexploitthis
phenomenon to produce useful information. 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,PSRRisguaranteeddownto4.7V( 2.35V)toensure
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—
twice the maximum drift specification of the LTC1049.
The copper/kovar junction, formed when wire or printed
circuit 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.Pins1,5,and8oftheLTC1049arenotconnected
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
Typical applicaTions
Low Power, Low Hold Step Sample-and-Hold
5V
13
LTC201
5V
7
2
3
4.5
–
6
V
LTC1049
OUT
3
2
V
+
IN
4
DROOP ≤1mV/s
HOLD STEP ≤20µV
0.47µF
MYLAR
1
I
S
= 250µA TYP
S/H
LTC1049 • TA02
1049fb
7
LTC1049
Typical applicaTions
Low Power, Single Supply, Low Offset Instrumentation Amp
5V
198k
2k
2k
198k
2
3
2
7
7
–
–
6
6
V
LTC1049
4
OUT
LTC1049
3
+
+
4
+ V
– V
IN
IN
GAIN = 100
= 400µA
I
S
CMRR ≥ 60dB, WITH 0.1% RESISTORS (RESISTORS LIMITED)
LTC1049 • TA03
1049fb
8
LTC1049
package DescripTion
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
package DescripTion
N8 Package
8-Lead PDIP (Narrow .300 Inch)
(Reference LTC DWG # 05-08-1510)
.400ꢁ
(10.160)
MAX
8
ꢀ
6
5
4
.255 .015ꢁ
(6.4ꢀꢀ 0.381)
1
2
3
.130 .005
.300 – .325
.045 – .065
(3.302 0.12ꢀ)
(1.143 – 1.651)
(ꢀ.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
(0.45ꢀ 0.0ꢀ6)
.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
package DescripTion
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 representa-
tion that the interconnection of its circuits as described herein will not infringe on existing patent rights.
11
LTC1049
Typical applicaTion
Thermocouple-Based Temperature to Frequency Converter
6V
+
0.02µF
6V
TYPE K
THERMO-
COUPLE
Q1
2N3904
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
●
●
LINEAR TECHNOLOGY CORPORATION 1991
(408) 432-1900 FAX: (408) 434-0507 www.linear.com
相关型号：
LTC1050ACN8#PBF
LTC1050 - Precision Zero-Drift Operational Amplifier with Internal Capacitors; Package: PDIP; Pins: 8; Temperature Range: 0°C to 70°C
Linear
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