LTC1047CSW [Linear]
Dual Micropower Zero-Drift Operational Amplifier with Internal Capacitors; 双微功耗零漂移与内部电容运算放大器
| 型号： | LTC1047CSW |
| 厂家： | 
Linear |
| 描述： | Dual Micropower Zero-Drift Operational Amplifier with Internal Capacitors |
| 文件： | 总12页 (文件大小：154K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
LTC1047
Dual Micropower
Zero-Drift Operational Amplifier
with Internal Capacitors
U
FEATURES
DESCRIPTIO
The LTC®1047 is a micropower, high performance
dualzero-driftoperationalamplifier.Thesample-and-hold
capacitors usually required by other chopper amplifiers
are integrated on-chip, minimizing the need for external
components.
■
No External Components Required
Maximum Offset Voltage: 10µV
■
■
■
■
■
■
■
■
■
■
Maximum Offset Voltage Drift: 50nV/
Supply Current: 80µA
°C
Minimum CMRR: 110dB
Minimum PSRR: 105dB
The LTC1047 has a typical offset voltage of 3µV, drift
of 10nV/°C, input noise voltage typically 3.5µVP-P
Single Supply Operation: 4.75V to 16V
Common Mode Range Includes GND
Output Swings to GND
,
and typical voltage gain of 150dB. The common mode
rejectionis110dBminimum, withminimumpowersupply
rejection of 105dB. The LTC1047 also offers a 0.2V/µs
slew rate and a gain bandwidth product of 200kHz. Over-
load recovery time from saturation is 70ms, four times
faster than chopper amplifiers with external capacitors.
Typical Overload Recovery Time: 70ms
Pin Compatible with Industry Standard Dual
Op Amps
U
APPLICATIO S
The LTC1047 is available in a standard plastic 8-pin PDIP
as well as a 16-pin SW package. The LTC1047 is a plug-in
replacement for most dual op amps with improved DC
performance and substantial power savings.
■
Thermocouple Amplifiers
■
Electronic Scales
■
Battery Powered Instrumentation
Strain Gauge Amplifiers
Remote Located Sensors
, LTC and LT are registered trademarks of Linear Technology Corporation.
■
■
U
TYPICAL APPLICATIO
Micropower Single Supply Instrumentation Amplifier
CMRR vs Frequency
140
C
= C = 1µF
H
5V
S
120
100
80
4
1/2 LTC1043
3
100Ω
100k
5V
–IN
+IN
18
15
C
C
S
H
6
5
1µF
1µF
60
–
2
7
1/2
LTC1047
V
OUT
40
6
5
+
4
20
16
17
GAIN = 1000
CMRR > = 120dB AT 60Hz
= < 10µV
100
1k
10k
100k
FREQUENCY OF COMMON MODE SIGNAL
LTC1047 • TA01
0.1µF
V
I
OS
= 62µA (INCLUDING THE LTC1043)
LT1047 • TA02
S
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1
LTC1047
W W
U W
ABSOLUTE AXI U RATI GS
Total Supply Voltage (V+ to V–) ............................... 16V
Input Voltage (Note 2) .......... (V+ + 0.3V) to (V– – 0.3V)
Output Short-Circuit Duration.......................... Indefinite
(Note 1)
Storage Temperature Range ................. –65°C to 150°C
Operating Temperature Range ..................... 0°C to 70°C
Lead Temperature (Soldering, 10 sec).................. 300°C
U W
U
PACKAGE/ORDER I FOR ATIO
ORDER PART
NUMBER
ORDER PART
TOP VIEW
NUMBER
NC
NC
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
NC
NC
TOP VIEW
+
LTC1047CN8
LTC1047CSW
OUT A
–IN A
+IN A
1
2
3
4
V
+
8
7
6
5
OUT A
–IN A
+IN A
V
OUT B
–IN B
+IN B
OUT B
–IN B
+IN B
NC
–
–
V
V
NC
NC
N8 PACKAGE
8-LEAD PDIP
NC
T
= 110°C, θ = 130°C/W
JMAX
JA
SW PACKAGE
16-LEAD PLASTIC SO WIDE
= 110°C, θ = 200°C/W
T
JMAX
JA
Consult LTC Marketing for parts specified with wider operating temperature ranges.
ELECTRICAL CHARACTERISTICS
The ■ denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VS = ±5V, unless otherwise noted.
PARAMETER
CONDlTlONS
MIN
TYP
±3
MAX
±10
UNITS
µV
Input Offset Voltage
Average Input Offset Voltage Drift
Long Term Offset Drift
Input Bias Current
T = 25°C (Note 3)
A
(Note 3)
■
±0.01
100
±5
±0.05
µV/°C
nV√mo
±30
±300
pA
pA
■
■
Input Offset Current
Input Noise Voltage
±10
±60
±150
pA
pA
0.1Hz to 10Hz
0.1Hz to 1Hz
3.5
0.8
µV
P-P
µV
P-P
Input Noise Current
f = 10Hz (Note 4)
1.5
fA√Hz
–
Common Mode Rejection Ratio
V
= V to 2.7V, T = 25°C
■
110
105
130
dB
dB
CM
A
Power Supply Rejection Ratio
Large-Signal Voltage Gain
V = ±2.375V to ±8V
■
■
105
120
122
150
dB
dB
S
R = 100k, V
= ±4V
OUT
L
Maximum Output Voltage Swing
R = 10k
R = 100k
L
4.3/–4.8
±4.95
V
V
L
■
4.8/–4.9
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2
LTC1047
ELECTRICAL CHARACTERISTICS
The ■ denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VS = ±5V, unless otherwise noted.
PARAMETER
CONDlTlONS
R = 100k, C = 50pF
MIN
TYP
0.2
MAX
UNITS
V/µs
kHz
Slew Rate
L
L
Gain Bandwidth Product
Supply Current/Amplifier
200
No Load, 25°C ≤ T ≤ 70°C
60
80
150
275
µA
µA
A
No Load, 0°C ≤ T ≤ 25°C
A
Internal Sampling Frequency
680
Hz
Note 1: Absolute Maximum Ratings are those values beyond which the life
Note 3: These parameters are guaranteed by design. Thermocouple effects
preclude measurements of these voltage levels in high speed automatic
of a device may be impaired.
Note 2: Connecting any terminal to voltages greater than V or less than V
+
–
test systems. V is measured to a limit determined by test equipment
OS
capability.
may cause destructive latch-up. It is recommended that no sources
operating from external supplies be applied prior to power-up of the
LTC1047.
Note 4: Current Noise is calculated from the formula: I = √2q • I ) where
n
B
–19
q = 1.6 • 10 Coulomb.
U W
TYPICAL PERFOR A CE CHARACTERISTICS
Supply Current vs
Supply Voltage Per Amplifier
120
Supply Current vs
Temperature Per Amplifier
90
80
70
60
50
40
V
= ±5V
T
A
= 25°C
S
100
80
60
40
20
0
4
8
10
12
14
–
16
50
6
–50
0
25
75 100 125
–25
+
TOTAL SUPPLY VOLTAGE, V TO V (V)
AMBIENT TEMPERATURE, T (°C)
A
LTC1047 • TPC03
LTC1047 • TPC02
Common Mode Input Range
vs Supply Voltage
Output Short-Circuit Current
vs Supply Voltage
3
2
8
6
–
V
CM
= V
–
V
= V
SOURCE
OUT
4
I
1
2
0
0
+
–2
–4
–6
–8
V
= V
SINK
OUT
–4
–8
–12
I
4
5
0
1
2
3
6
7
8
4
8
10
12
14
–
16
6
+
SUPPLY VOLTAGE (±V)
TOTAL SUPPLY VOLTAGE, V TO V (V)
LTC1047 • TPC05
LTC1047 • TPC04
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3
LTC1047
U W
TYPICAL PERFOR A CE CHARACTERISTICS
CMRR vs Frequency
PSRR vs Frequency
120
160
140
120
100
80
V
= ±5V
= 25°C
S
A
T
100
80
NEGATIVE SUPPLY
60
40
60
40
POSITIVE SUPPLY
20
0
20
0
1
10
100
1k
10k
100k
1
10
100
1k
10k
100k
FREQUENCY (Hz)
FREQUENCY (Hz)
LTC1047 • TPC07
LTC1047 • TPC06
Sampling Frequency
vs Supply Voltage
Gain, Phase vs Frequency, ±5V
900
800
700
600
80
60
40
20
0
45
T
= 25°C
A
PHASE
90
135
180
225
270
GAIN
V
C
= ±5V
= 50pF
S
L
500
–20
10
2
3
4
5
6
4
6
8
10
12
14
–
16
10
10
FREQUENCY (Hz)
10
10
+
TOTAL SUPPLY VOLTAGE, V TO V (V)
LTC1047 • TPC09
LTC1047 • TPC08
Sampling Frequency
vs Temperature
Small-Signal Transient Response
1000
900
800
700
600
500
V
= ±5V
S
100mV
STEP
AV = +1
10µs/DIV
RL = 100k
CL = 50pF
LTC1047 • TPC11
–50
0
25
50
75 100 125
–25
V
S = ±5V
AMBIENT TEMPERATURE, T (°C)
A
LTC1047 • TPC010
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LTC1047
U W
TYPICAL PERFOR A CE CHARACTERISTICS
Large-Signal Transient Response
Overload Recovery
0
–5V
200mV
0
AV = 100
VS = ±5V
10ms/DIV
AV = +1
10µs/DIV
RL = 100k
CL = 50pF
LTC1047 • TPC13
LTC1047 • TPC12
VS = ±5V
TEST CIRCUITS
Electrical Characteristics Test Circuit
1M
1k
+
V
2
3
8
–
1/2
LTC1047
6
OUTPUT
+
4
R
L
–
V
LTC1047 • TC01
DC to 10Hz Noise Test Circuit
100k
475k
10Ω
0.01µF
2
–
158k
316k
475k
6
1/2
LTC1047
–
3
LT®1012
OUTPUT
+
0.01µF
0.01µF
+
FOR 1Hz NOISE BANDWIDTH, INCREASE ALL CAPACITORS BY A FACTOR OF 10
LTC1047 • TC02
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5
LTC1047
W U U
U
APPLICATIO S I FOR ATIO
Input Considerations
Aliasing
Frequently circuits built with parts as precise as the
LTC1047 show errors at the output far greater than the
designer expects. Rarely is the problem the op amp; more
often the surrounding circuitry is causing errors several
ordersofmagnitudegreaterthanthoseduetotheLTC1047.
Such obscure effects as leakage between pins, due to
residualsolderfluxandthermocoupleeffectsbetweenthe
tin/lead solder and the copper PC board traces, can
overwhelm the pA-level bias currents and the µV-level
offset of the LTC1047. For a more complete description of
these types of problems (and some advice on avoiding
them), see the LTC1051/LTC1053 data sheet.
Likeallsampleddatasystems,theLTC1047willaliasinput
signals near its internal sampling frequency. The design
includes internal circuitry to minimize this effect; as a
result, most applications do not exhibit aliasing problems.
For a complete discussion of the correction circuitry and
aliasing behavior, refer to the LTC1051/LTC1053 data
sheet.
Single Supply Operation
The LTC1047 is compatible with all single supply
applications. It has an input common mode range which
includes V–, and an output which will swing within
millivolts of the negative power supply. The LTC1047 is
guaranteed functional down to 4.75V total supply,
allowingittorunfromminimumTTLvoltageallthewayup
to 16V. See the Typical Applications section for examples
of single supply operation.
Input Capacitance
The LTC1047 has approximately 12pF of capacitance at
each input pin. This will react with large series resistors to
form a pole at the input, degrading the LTC1047's phase
margin. The problem is especially common with
micropower parts like the LTC1047 because high value
resistorsareoftenusedtominimizepowerdissipation. As
a rule of thumb, bypass feedback resistors larger than 7k
with a 20pF capacitor to minimize this effect.
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6
LTC1047
U
TYPICAL APPLICATIO S
Low Offset, Low Drift Instrumentation Amplifier
1M
1k
1k
1M
5V
2
3
6
5
8
–
–
1
7
1/2
LTC1047
1/2
LTC1047
OUTPUT
+
+
–IN
+IN
4
A
V
I
= 1000
OS
= 100µA
V
= ±6µV
–5V
S
CMRR ≥ 120dB
LTC1047 • TA02
Precise DC Full-Wave Rectifier (Absolute Value Circuit)
220k
5V
220k
2
3
8
INPUT
–
1N4148
5
6
1/2
LTC1047
1
+
0V
7
1/2
LTC1047
+
OUTPUT
4
–
I
= 50µA
OS
S
V
= 3µV
LTC1047 • TA03
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7
LTC1047
U
TYPICAL APPLICATIO S
4mA to 20mA Transducer Amplifier
5
8
4
LT1120
0.1µF
1M
1M
1000pF
2
TO
1
3
7
6
LOOP
+
10µF
R1
619K
1%
R2
61.9k
1%
2
3
–
5
6
1
8
1/2
LTC1047
+
1k
1/2
LTC1047
7
2N2222
+
49.9k
1%
INPUT
0V TO 1V
–
4
49.9Ω
1%
INITIAL ACCURACY = 3% (LIMITED BY REFERENCE IN LT1120)
TRIM R1 FOR 4.00mA WITH 0.00V IN
TRIM R2 FOR 20.0mA WITH 1.00V IN
TO
LOOP
LTC1047 • TA04
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8
LTC1047
U
TYPICAL APPLICATIO S
Ultralow Noise Micropower Chopper
0.47µF
5V
5V
5V
0.1µF
75k
20k
100k
–
39k
1/2
LTC1047
+
1/2
LTC1047
+
OUT
–
100k
50pF
0.1µF
–IN
–5V
100k
+IN
25K147 x 2
10Ω
100k
150k
–5V
I
= 150µA
S
0.1Hz TO 10Hz = 95nV
P-P
A
= 10000
V
LTC1047 • TA06
0.47µF
0.1Hz to 10Hz Noise (Input Referred)
200nV
V
= ±5V
= 150µA
S
S
I
100nV
50nV/DIV
–100nV
–200nV
10
0
TIME (SEC)
LTC1047 • TA07
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9
LTC1047
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)
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10
LTC1047
U
PACKAGE DESCRIPTIO
SW Package
16-Lead Plastic Small Outline (Wide .300 Inch)
(Reference LTC DWG # 05-08-1620)
.050 BSC .045 ±.005
.030 ±.005
.398 – .413
(10.109 – 10.490)
NOTE 4
TYP
15 14
12
10
9
N
16
N
13
11
.325 ±.005
.420
MIN
.394 – .419
(10.007 – 10.643)
NOTE 3
N/2
8
1
2
3
N/2
RECOMMENDED SOLDER PAD LAYOUT
2
3
5
7
1
4
6
.291 – .299
(7.391 – 7.595)
NOTE 4
.037 – .045
(0.940 – 1.143)
.093 – .104
(2.362 – 2.642)
.010 – .029
× 45°
(0.254 – 0.737)
.005
(0.127)
RAD MIN
0° – 8° TYP
.050
(1.270)
BSC
.004 – .012
.009 – .013
(0.102 – 0.305)
NOTE 3
(0.229 – 0.330)
.014 – .019
.016 – .050
(0.356 – 0.482)
TYP
(0.406 – 1.270)
NOTE:
1. DIMENSIONS IN
INCHES
(MILLIMETERS)
S16 (WIDE) 0502
2. DRAWING NOT TO SCALE
3. PIN 1 IDENT, NOTCH ON TOP AND CAVITIES ON THE BOTTOM OF PACKAGES ARE THE MANUFACTURING OPTIONS.
THE PART MAY BE SUPPLIED WITH OR WITHOUT ANY OF THE OPTIONS
4. THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS.
MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED .006" (0.15mm)
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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
LTC1047
U
TYPICAL APPLICATIO
Low Noise, Low Drift Composite Amplifier
5V
5
6
8
+
1/2
LTC1047
7
10k
–
0.01µF
100k
2
3
–
1000pF
250k
1
1/2
LTC1047
5V
+
4
750Ω
56Ω
–5V
1
3
2
7
+
INPUT
8
6
+
®
OUTPUT
LT 1012
–
–
4
100k
–5V
V
= 3µV
OS
100Ω
0.1Hz TO 10Hz NOISE = 0.7µV
P-P
I
= 490µA
S
LTC1047 • TA05
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LW/TP 1202 1K REV A • 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 1992
相关型号：
LTC1049CS8#TR
LTC1049 - Low Power Zero-Drift Operational Amplifier with Internal Capacitors; Package: SO; Pins: 8; Temperature Range: 0°C to 70°C
Linear
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