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LT1008 の電気的特性と機能
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LT1008のメーカーはLinear Technologyです、この部品の機能は「Picoamp Input Current /Microvolt Offset /Low Noise Op Amp」です。 |
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製品の詳細 ( Datasheet PDF )
| 部品番号 LT1008 |
| 部品説明 Picoamp Input Current /Microvolt Offset /Low Noise Op Amp |
| メーカ Linear Technology |
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このページの下部にプレビューとLT1008ダウンロード（pdfファイル）リンクがあります。 Total 16 pages |
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FEATURES
■ Guaranteed Bias Current
TA = 25°C: 100pA Max
TA = – 55°C to 125°C: 600pA Max
■ Guaranteed Offset Voltage: 120μV Max
■ Guaranteed Drift: 1.5μV/°C Max
■ Low Noise, 0.1Hz to 10Hz: 0.5μVP-P
■ Guaranteed Low Supply Current: 600μA Max
■ Guaranteed CMRR: 114dB Min
■ Guaranteed PSRR: 114dB Min
■ Guaranteed Voltage Gain with 5mA Load Current
■ Available in 8-Lead PDIP and SO Packages
U
APPLICATIO S
■ Precision Instrumentation
■ Charge Integrators
■ Wide Dynamic Range Logarithmic Amplifiers
■ Light Meters
■ Low Frequency Active Filters
■ Standard Cell Buffers
■ Thermocouple Amplifiers
LT1008
Picoamp Input Current,
Microvolt Offset,
Low Noise Op Amp
DESCRIPTIO
The LT®1008 is a universal precision operational amplifier
that can be used in practically all precision applications.
The LT1008 combines for the first time, picoampere bias
currents (which are maintained over the full – 55°C to
125°C temperature range), microvolt offset voltage (and
low drift with time and temperature), low voltage and
current noise, and low power dissipation. Extremely high
common mode and power supply rejection ratios, and the
ability to deliver 5mA load current with high voltage gain
round out the LT1008’s superb precision specifications.
The all around excellence of the LT1008 eliminates the
necessity of the time consuming error analysis procedure
of precision system design in many applications; the
LT1008 can be stocked as the universal precision op amp.
The LT1008 is externally compensated with a single ca-
pacitor for additional flexibility in shaping the frequency
response of the amplifier. It plugs into and upgrades all
standard LM108A/LM308A applications. For an internally
compensated version with even lower offset voltage but
otherwise similar performance see the LT1012.
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
TYPICAL APPLICATIO
Input Amplifier for 4.5 Digit Voltmeter
INPUT
1000pF
0.1V
1V
9M
10V
900k
100V
90k
1000V
10k
2 –1
15V
8
100k
LT1008
5% 3 +
76
4
–15V
9k*
1k*
0.1V
1V
10V
100V
1000V TO 1V FULL-SCALE
ANALOG-TO-DIGITAL
CONVERTER
*RATIO MATCH ±0.01%
FN507
ALLEN BRADLEY
DECADE VOLTAGE DIVIDER
THIS APPLICATION REQUIRES LOW
BIAS CURRENT AND OFFSET VOLTAGE,
LOW NOISE AND LOW DRIFT WITH
TIME AND TEMPERATURE
1008 TA01
Input Bias Current vs Temperature
100
50
UNDERCANCELLED UNIT
0
OVERCANCELLED UNIT
–50
–100
–150
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
1008 TA02
1008fb
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1 Page
LT1008
ELECTRICAL CHARACTERISTICS VS = ±15V, VCM = 0V, TA = 25°C, unless otherwise noted.
SYMBOL PARAMETER
CONDITIONS
LT1008M/I
LT1008C
MIN TYP MAX MIN TYP MAX
CMRR
PSRR
VOUT
IS
Common Mode Rejection Ratio
Power Supply Rejection Ratio
Input Voltage Range
Output Voltage Swing
Slew Rate
Supply Current
VCM = ±13.5V
VS = ±2V to ±20V
RL = 10k
CF = 30pF
(Note 3)
114 132
114 132
114 132
114 132
±13.5 ±14
±13.5 ±14
±13 ±14
±13 ±14
0.1 0.2
0.1 0.2
380 600
380 600
UNITS
dB
dB
V
V
V/μs
μA
The ● indicates specifications which apply over the full operating temperature range of – 55°C ≤ TA ≤ 125°C for the LT1008M, – 40°C
≤ TA ≤ 85°C for the LT1008I and 0°C ≤ TA ≤ 70°C for the LT1008C. VS = ±15V, VCM = 0V, unless otherwise noted.
SYMBOL PARAMETER
VOS Input Offset Voltage
Average Temperature Coefficient of
Input Offset Voltage
IOS Input Offset Current
Average Temperature Coefficient of
Input Offset Current
IB Input Bias Current
AVOL
CMRR
PSRR
VOUT
IS
Average Temperature Coefficient of
Input Bias Current
Large-Signal Voltage Gain
Common Mode Rejection Ratio
Power Supply Rejection Ratio
Input Voltage Range
Output Voltage Swing
Supply Current
CONDITIONS
(Note 3)
(Note 3)
(Note 3)
VOUT = ±12V, RL ≥ 10k
VCM = ±13.5V
VS = ±2.5V to ±20V
RL = 10k
LT1008M/I
LT1008C
MIN TYP MAX MIN TYP MAX
● 50 250
● 60 320
40 180
50 250
● 0.2 1.5
● 60 250
● 80 350
0.2 1.5
40 180
50 250
● 0.4 2.5
● ±80 ±600
● ±150 ±800
0.4 2.5
±40 ±180
±50 ±250
● 0.6 6
● 100 1000
● 108 128
● 108 126
● ±13.5
● ±13 ±14
● 400 800
0.4 2.5
150 1500
110 130
110 128
±13.5
±13 ±14
400 800
UNITS
μV
μV
μV/°C
pA
pA
pA/°C
pA
pA
pA/°C
V/mV
dB
dB
V
V
μA
(LT1008S8 only) VS = ±15V, VCM = 0V, TA = 25°C, unless otherwise noted.
SYMBOL PARAMETER
CONDITIONS
VOS Input Offset Voltage
(Note 3)
Long-Term Input Offset Voltage Stability
IOS Input Offset Current
(Note 3)
IB Input Bias Current
(Note 3)
en Input Noise Voltage
Input Noise Voltage Density
0.1Hz to 10Hz
fO = 10Hz (Note 5)
fO = 1000Hz (Note 5)
MIN TYP MAX
UNITS
30 200
40 250
μV
μV
0.3 μV/Month
100 280
120 380
pA
pA
±100 ±300
±120 ±400
pA
pA
0.5 μVP-P
17 30 nV/√Hz
14 22 nV/√Hz
1008fb
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3Pages
LT1008
TYPICAL PERFOR A CE CHARACTERISTICS
Supply Current vs Supply Voltage
500
450
400
350
300
0
25°C
125°C
–55°C
5 10 15
SUPPLY VOLTAGE (±V)
20
1008 G07
Output Short-Circuit Current vs Time
15
12
–55°C
9
6
25°C 125°C
3
0
–3
–6 125°C
25°C
–9
–12 –55°C
–15
0 0.5 1.0 1.5 2.0 2.5 3.0 3.5
TIME FROM OUTPUT SHORT (MINUTES)
1008 G08
0.1Hz to 10Hz Noise
TA = 25°C
VS = ±2V TO ±20V
0 2 4 6 8 10
TIME (SECONDS)
1008 G09
Noise Spectrum
1000
TA = 25°C
VS = ±2V TO ±20V
100
CURRENT NOISE
10 1/f CORNER
2.5Hz
VOLTAGE NOISE
1/f CORNER
120Hz
1
1 10 100 1000
FREQUENCY (Hz)
1008 G10
Total Noise vs Source Resistance
10
TA = 25°C
VS = ±2V TO ±20V
1 R–
R+
AT 10Hz
AT 1Hz
RS = 2R
0.1
AT 1Hz
AT 10Hz
0.01
102 103
RESISTOR NOISE ONLY
104 105 106 107
SOURCE RESISTANCE (Ω)
108
1008 G11
Voltage Gain vs Frequency
140
120
CF = 3pF
100
CS = 10pF
80
CS = 100pF
60
CF = 30pF
40
Gain, Phase Shift vs Frequency
with Alternate Compensation
40
GAIN
CS = 10pF
30
φ
20 CS = 10pF
GAIN
CS = 100pF
10
φ
CS = 100pF
100
120
140
160
Gain, Phase Shift vs Frequency
with Standard (Feedback)
Compensation
40
GAIN
30 CF = 3pF
20 GAIN
CF = 30pF
φ
CF = 30pF
φ
CF = 3pF
100
120
140
10 160
20
0
PHASE MARGIN
WITH CS = 100pF = 56°
0 TA = 25°C
–20 –10 VS = ±15V
0.01 0.1 1 10 100 1k 10k 100k 1M 10M 0.01
0.1
1
FREQUENCY (Hz)
FREQUENCY (MHz)
1008 G12
180
200
10
1008 G13
PHASE MARGIN
0 WITH CF = 30pF = 60°
TA = 25°C
VS = ±15V
–10
0.01 0.1
1
FREQUENCY (MHz)
180
200
10
1008 G14
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6 Page
合計 : 16 ページ |
| PDF ダウンロード [ LT1008 データシート.PDF ] |
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データシートを活用すると、その部品の主な機能と仕様を詳しく理解できます。 ピン構成、電気的特性、動作パラメータ、性能を確認してください。 |
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