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LTC1250CS8#TRPBF

P1-P3P4-P6P7-P9P10-P12
LTC1250
1
1250fb
, LTC and LT are registered trademarks of Linear Technology Corporation. All other
trademarks are the property of their respective owners. Protected by U.S. Patents
including 4933642.
–
+
5V
–5V
1000pF
18.2k
1000pF
18.2k
7
6
4
3
2
–5V
0.1µF
5V
A
V
= 100
1250 TA01
350Ω
STRAIN
GAUGE
50Ω
GAIN
TRIM
LTC1250
TIME (s)
0
µV
1
2
8
LT1250 TA02
0
–1
–2
2
4
6
10
V
S
= ±5V
A
V
= 10k
TYPICAL APPLICATIO
U
APPLICATIO S
U
DESCRIPTIO
U
FEATURES
Very Low Noise
Zero-Drift Bridge Amplifier
■
Electronic Scales
■
Strain Gauge Amplifiers
■
Thermocouple Amplifiers
■
High Resolution Data Acquisition
■
Low Noise Transducers
■
Instrumentation Amplifiers
■
Very Low Noise: 0.75µV
P-P
Typ, 0.1Hz to 10Hz
■
DC to 1Hz Noise Lower Than OP-07
■
Full Output Swing into 1k Load
■
Offset Voltage: 10µV Max
■
Offset Voltage Drift: 50nV/°C Max
■
Common Mode Rejection Ratio: 110dB Min
■
Power Supply Rejection Ratio: 115dB Min
■
No External Components Required
■
Pin Compatible with Standard 8-Pin Op Amps
■
Available in Standard 8-Pin Plastic DIP
and 8-Pin SO Packages
The LTC
®
1250 is a high performance, very low noise zero-
drift operational amplifier. The LTC1250’s combination of
low front-end noise and DC precision makes it ideal for use
with low impedance bridge transducers. The LTC1250
features typical input noise of 0.75µV
P-P
from 0.1Hz to
10Hz, and 0.2µV
P-P
from 0.1Hz to 1Hz. The LTC1250 has
DC to 1Hz noise of 0.35µV
P-P
, surpassing that of low noise
bipolar parts including the OP-07, OP-77, and LT1012.
The LTC1250 uses the industry-standard single op amp
pinout, and requires no external components or nulling
signals, allowing it to be a plug-in replacement for bipolar
op amps.
The LTC1250 incorporates an improved output stage
capable of driving 4.3V into a 1k load with a single 5V
supply; it will swing ±4.9V into 5k with ±5V supplies. The
input common mode range includes ground with single
power supply voltages above 12V. Supply current is 3mA
with a ±5V supply, and overload recovery times from
positive and negative saturation are 0.5ms and 1.5ms,
respectively. The internal nulling clock is set at 5kHz for
optimum low frequency noise and offset drift; no external
connections are necessary.
The LTC1250 is available in a standard 8-pin plastic DIP
and 8-pin SO packages.
Input Referred Noise 0.1Hz to 10Hz
Differential Bridge Amplifier
LTC1250
2
1250fb
ABSOLUTE AXI U RATI GS
W
WW
U
(Note 1)
Total Supply Voltage (V
+
to V
–
) ............................. 18V
Input Voltage ........................ (V
+
+ 0.3V) to (V
–
– 0.3V)
Output Short Circuit Duration ......................... Indefinite
Storage Temperature Range ................ – 65°C to 150°C
Lead Temperature (Soldering, 10 sec.)................ 300°C
WU
U
PACKAGE
/
O
RDER I FOR ATIO
LTC1250M LTC1250C
SYMBOL PARAMETER CONDITIONS MIN TYP MAX MIN TYP MAX UNITS
V
OS
Input Offset Voltage T
A
= 25°C (Note 2) ±5 ±10 ±5 ±10 µV
∆V
OS
Average Input Offset Drift (Note 2) ● ±0.01 ±0.05 ±0.01 ±0.05 µV/°C
Long Term Offset Drift 50 50 nV/√Mo
e
n
Input Noise Voltage (Note 3) T
A
= 25°C, 0.1Hz to 10Hz 0.75 1.0 0.75 1.0 µV
P-P
T
A
= 25°C, 0.1Hz to 1Hz 0.2 0.2 µV
P-P
i
n
Input Noise Current f = 10Hz 4.0 4.0 fA/√Hz
I
B
Input Bias Current T
A
= 25°C (Note 4) ±50 ±150 ±50 ±200 pA
● ±950 ±450 pA
I
OS
Input Offset Current T
A
= 25°C (Note 4) ±100 ±300 ±100 ±400 pA
● ±500 ±500 pA
CMRR Common Mode Rejection Ratio V
CM
= –4V to 3V ● 110 130 110 130 dB
PSRR Power Supply Rejection Ratio V
S
= ±2.375V to ±8V ● 115 130 115 130 dB
A
VOL
Large-Signal Voltage Gain R
L
= 10k, V
OUT
= ±4V ● 125 170 125 170 dB
Maximum Output Voltage Swing R
L
= 1k ● ±4.0 4.3/–4.7 ±4.0 4.3/–4.7 V
R
L
= 100k ±4.92 ±4.95 V
SR Slew Rate R
L
= 10k, C
L
= 50pF 10 10 V/µs
GBW Gain-Bandwidth Product 1.5 1.5 MHz
I
S
Supply Current No Load, T
A
= 25°C 3.0 4.0 3.0 4.0 mA
● 7.0 5.0 mA
Operating Temperature Range
LTC1250M (OBSOLETE) ............ –55°C to 125°C
LTC1250C .......................................... 0°C TO 70°C
1
2
3
4
8
7
6
5
TOP VIEW
NC
–IN
+IN
V
–
NC
V
+
OUT
NC
N8 PACKAGE
8-LEAD PLASTIC DIP
ORDER PART
NUMBER
LTC1250CN8
T
JMAX
= 110°C, θ
JA
= 130°CW
OBSOLETE PACKAGE
J8 PACKAGE
8-LEAD CERAMIC DIP
T
JMAX
= 150°C, θ
JA
= 100°CW (J8)
LTC1250MJ8
LTC1250CJ8
ORDER PART
NUMBER
LTC1250CS8
T
JMAX
= 110°C, θ
JA
= 200°CW
S8 PART MARKING
1250
Consider the N8 or S8 for Alternative Source
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, V
IN
= ±5V, otherwise specifications are at T
A
= 25°C.
1
2
3
4
8
7
6
5
TOP VIEW
S8 PACKAGE
8-LEAD PLASTIC SO
NC
–IN
+IN
V
–
NC
V
+
OUT
NC
LTC1250
3
1250fb
LTC1250M LTC1250C
SYMBOL PARAMETER CONDITIONS MIN TYP MAX MIN TYP MAX UNITS
f
S
Internal Sampling Frequency T
A
= 25°C 4.75 4.75 kHz
V
OS
Input Offset Voltage T
A
= 25°C (Note 2) ±2 ±5 ±2 ±5 µV
∆V
OS
Average Input Offset Drift (Note 2) ● ±0.01 ±0.05 ±0.01 ±0.05 µV/°C
e
n
Input Noise Voltage (Note 3) T
A
= 25°C, 0.1Hz to 10Hz 1.0 1.0 µV
P-P
T
A
= 25°C, 0.1Hz to 1Hz 0.3 0.3 µV
P-P
I
B
Input Bias Current T
A
= 25°C (Note 4) ±20 ±100 ±20 ±100 pA
I
OS
Input Offset Current T
A
= 25°C (Note 4) ±40 ±200 ±40 ±200 pA
Maximum Output Voltage Swing R
L
= 1k 4.0 4.3 4.0 4.3 V
R
L
= 100k 4.95 4.95 V
I
S
Supply Current T
A
= 25°C 1.8 2.5 1.8 2.5 mA
f
S
Sampling Frequency T
A
= 25°C 3 3 kHz
CCHARA TERIST
ICS
UW
AT
Y
P
I
CA
LPER
F
O
R
C
E
TOTAL SUPPLY VOLTAGE, V
+
TO V
–
(V)
4
2
SAMPLING FREQUENCY (kHz)
3
4
68
10
12
1250 G03
5
6
14
16
T
A
= 25°C
TOTAL SUPPLY VOLTAGE, V
+
TO V
–
(V)
4
0
SUPPLY CURRENT (mA)
0.5
1.0
1.5
2.0
68
10
12
1250 G02
2.5
3.0
3.5
4.0
14
16
T
A
= 25°C
TOTAL SUPPLY VOLTAGE, V
+
TO V
–
(V)
4
0
INPUT NOISE (µV
P-P
)
0.2
0.4
0.6
0.8
68
10
12
1250 G01
1.0
1.2
1.4
1.6
14
16
T
A
= 25°C
0.1Hz TO 10Hz
0.1Hz TO 1Hz
Sampling Frequency vs Supply
Voltage
Supply Current vs Supply Voltage
Input Noise vs Supply Voltage
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: These parameters are guaranteed by design. Thermocouple effects
preclude measurement of these voltage levels during automated testing.
Note 3: 0.1Hz to 10Hz noise is specified DC coupled in a 10s window;
0.1Hz to 1Hz noise is specified in a 100s window with an RC high-pass
filter at 0.1Hz. The LTC1250 is sample tested for noise; for 100% tested
parts contact LTC Marketing Dept.
Note 4: At T ≤ 0°C these parameters are guaranteed by design and not
tested.
ELECTRICAL CHARACTERISTICS
The ● denotes the specifications which apply over the full operating
temperature range, V
IN
= ±5V, otherwise specifications are at T
A
P1-P3P4-P6P7-P9P10-P12

LTC1250CS8#TRPBF

Mfr. #:
Buy LTC1250CS8#TRPBF
Manufacturer:
Analog Devices Inc.
Description:
Precision Amplifiers Very L N Zero-Drift Bridge Amp
Lifecycle:
New from this manufacturer.
Delivery:
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