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Linear Technology Electronic Components Datasheet

LT1008 Datasheet

Picoamp Input Current /Microvolt Offset /Low Noise Op Amp

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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
1


Linear Technology Electronic Components Datasheet

LT1008 Datasheet

Picoamp Input Current /Microvolt Offset /Low Noise Op Amp

No Preview Available !

LT1008
ABSOLUTE AXI U RATI GS (Note 1)
Supply Voltage ...................................................... ±20V
Differential Input Current (Note 2) ..................... ±10mA
Input Voltage ........................................................ ±20V
Output Short-Circuit Duration ......................... Indefinite
Storage Temperature Range ................. – 65°C to 150°C
Operating Temperature Range
LT1008M (OBSOLETE) ............... – 55°C to 125°C
LT1008C ................................................. 0°C to 70°C
LT1008I ............................................. – 40°C to 85°C
Lead Temperature (Soldering, 10 sec).................. 300°C
UW U
PACKAGE/ORDER I FOR ATIO
TOP VIEW
COMP2
8
COMP1 1
7 V+
–IN 2
+
6 OUT
+IN 3
5 NC
4
V(CASE)
H PACKAGE
8-LEAD TO-5 METAL CAN
TJMAX = 150°C, θJA = 150°C/W, θJC = 45°C/W
ORDER PART
NUMBER
TOP VIEW
COMP1 1
–IN 2
+IN 3
V4
8 COMP2
7 V+
6 OUT
5 NC
N8 PACKAGE
8-LEAD PDIP
TJMAX = 150°C, θJA = 130°C/W
J8 PACKAGE 8-LEAD CERDIP
TJMAX = 150°C, θJA = 100°C/W
ORDER PART
NUMBER
ORDER PART
NUMBER
TOP VIEW
COMP1 1
–IN 2
+IN 3
V4
8 COMP2
7 V+
6 OUT
5 NC
S8 PACKAGE
8-LEAD PLASTIC SO
TJMAX = 150°C, θJA = 190°C/W
ORDER PART
NUMBER
S8 PART
MARKING
LT1008MH
LT1008CH
LT1008MJ8
LT1008CJ8
LT1008CN8
LT1008IN8
LT1008S8
1008
OBSOLETE PACKAGES
Consider N8 or S8 Package for 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 VS = ±15V, VCM = 0V, TA = 25°C, unless otherwise noted.
SYMBOL PARAMETER
VOS Input Offset Voltage
Long-Term Input Offset Voltage Stability
IOS Input Offset Current
IB Input Bias Current
en Input Noise Voltage
Input Noise Voltage Density
in Input Noise Current Density
AVOL Large-Signal Voltage Gain
CONDITIONS
(Note 3)
(Note 3)
(Note 3)
0.1Hz to 10Hz
fO = 10Hz (Note 4)
fO = 1000Hz (Note 5)
fO = 10Hz
VOUT = ±12V, RL 10k
VOUT = ±10V, RL 2k
LT1008M/I
MIN TYP MAX
30 120
40 180
0.3
30 100
40 150
±30 ±100
±40 ±150
0.5
17 30
14 22
20
200 2000
120 600
LT1008C
MIN TYP MAX
30 120
40 180
0.3
30 100
40 150
±30 ±100
±40 ±150
0.5
17 30
14 22
20
200 2000
120 600
UNITS
μV
μV
μV/Month
pA
pA
pA
pA
μVP-P
nVHz
nV/Hz
fA/Hz
V/mV
V/mV
1008fb
2


Part Number LT1008
Description Picoamp Input Current /Microvolt Offset /Low Noise Op Amp
Maker Linear Technology
Total Page 16 Pages
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