Datasheet

LT1055/LT1056
6
10556fd
For more information www.linear.com/LT1055
TYPICAL PERFORMANCE CHARACTERISTICS
Input Bias and Offset Currents
vs Temperature
Input Bias Current Over the
Common Mode Range
Distribution of Input Offset
Voltage (N8 Package)
Distribution of Offset Voltage Drift
with Temperature (H Package)* Warm-Up Drift
Long Term Drift of
Representative Units
ELECTRICAL CHARACTERISTICS
For MIL-STD components, please refer to LTC883 data sheet for test
listing and parameters.
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 2: Offset voltage is measured under two different conditions:
(a) approximately 0.5 seconds after application of power; (b) at T
A
= 25°C
only, with the chip heated to approximately 38°C for the LT1055 and to
45°C for the LT1056, to account for chip temperature rise when the device
is fully warmed up.
Note 3: 10Hz noise voltage density is sample tested on every lot of A
grades. Devices 100% tested at 10Hz are available on request.
Note 4: This parameter is tested on a sample basis only.
Note 5: Current noise is calculated from the formula: i
n
= (2ql
B
)
1/2
, where
q = 1.6 • 10
–19
coulomb. The noise of source resistors up to 1GΩ swamps
the contribution of current noise.
Note 6: Offset voltage drift with temperature is practically unchanged when
the offset voltage is trimmed to zero with a 100k potentiometer between
the balance terminals and the wiper tied to V
+
. Devices tested to tighter
drift specifications are available on request.
AMBIENT TEMPERATURE (°C)
0
INPUT BIAS AND OFFSET CURRENT (pA)
100
300
1000
100
LT1055/56 G01
30
10
3
25
50
75
125
BIAS OR OFFSET CURRENTS
MAY BE POSITIVE OR NEGATIVE
BIAS CURRENT
OFFSET CURRENT
V
S
= ±15V
V
CM
= 0V
WARMED UP
LT1055/56 G02
COMMON MODE INPUT VOLTAGE (V)
–15
–120
INPUT BIAS CURRENT, T
A
= 25°C, T
A
= 70°C (pA)
–80
–40
0
40
120
–10
–5 0 5 10 15
80
–1200
–800
–400
0
400
1200
800
V
S
= ±15V
WARMED UP
T
A
= 125°C
T
A
= 125°C
T
A
= 25°C
T
A
= 70°C
T
A
= 70°C
A = POSITIVE INPUT CURRENT
B = NEGATIVE INPUT CURRENT
A
B
B
A
INPUT BIAS CURRENT, T
A
= 125°C (pA)
INPUT OFFSET VOLTAGE (µV)
–800
NUMBER OF INPUTS
80
100
120
800
LT1055/56 G03
60
40
0
–400
0
400
20
160
140
–600
–200
200
600
V
S
= ±15V
T
A
= 25°C
550 UNITS
TESTED FROM
TWO RUNS
(LT1056)
50% YIELD
TO ±140µV
OFFSET VOLTAGE DRIFT WITH TEMPERATURE (µV/°C)
–10
0
BATTERY VOLTAGE (V)
20
60
80
100
140
–8
0
4
LT1055/56 G04
40
120
–2
8
10
–6
–4
2 6
*DISTRIBUTION IN THE PLASTIC (N8) PACKAGE
IS SIGNIFICANTLY WIDER.
V
S
= ±15V
634 UNITS TESTED
FROM THREE RUNS
50% TO
±1.5µV/°C
TIME AFTER POWER ON (MINUTES)
0
CHANGE IN OFFSET VOLTAGE (µV)
60
80
100
4
LT1055/56 G05
40
20
0
1
2
3
5
V
S
= ±15V
T
A
= 25°C
LT1056CN8
LT1055CN8
LT1056 H PACKAGE
LT1055 H PACKAGE
TIME (MONTHS)
0
OFFSET VOLTAGE CHANGE (µV)
50
–50
40
–40
30
–30
20
–20
10
–10
0
4
LT1055/56 GO6
1
2
3
5
V
S
= ±15V
T
A
= 25°C