Datasheet

4
LT1457
TYPICAL PERFORMANCE CHARACTERISTICS
U
W
V
S
= ±15V
V
CM
= 0V
WARMED UP
AMBIENT TEMPERATURE (°C)
3
10
30
100
300
1000
INPUT BIAS AND OFFSET CURRENT (pA)
100
LT1457 • TPC01
0255075
BIAS CURRENT
OFFSET CURRENT
Input Bias and Offset Current vs
Temperature
V
S
= ±15V
T
A
= 25°C
N8 PACKAGE
S8 PACKAGE
TIME AFTER POWER ON (MINUTES)
0
60
30
120
90
150
CHANGE IN OFFSET VOLTAGE (µV)
5
LT1457 • TPC03
01234
Warm-Up Drift
V
S
= ±15V
T
A
= 70°C
T
A
= 25°C
COMMON-MODE INPUT VOLTAGE (V)
–20
20
0
60
40
80
120
140
100
160
INPUT BIAS CURRENT (pA)
15
LT1457 • TPC02
–15 –10 –5 0 5 10
Input Bias Current Over
the Common-Mode Range
Input Offset Voltage Distribution
N8 Package
Long Term Drift of
Representative UnitsVoltage Gain vs Temperature
V
S
= ±15V
V
O
= ±10V
R
L
= 2k
R
L
= 1k
TEMPERATURE (°C)
10
100
30
1000
300
VOLTAGE GAIN (V/mV)
10075
LT1457 • TPC05
–50 25–25 500
V
S
= ±15V
T
A
= 25°C
TIME (MONTHS)
–50
–30
–10
10
30
50
OFFSET VOLTAGE CHANGE (µV)
5
–40
–20
0
20
40
LT1457 • TPC06
012 43
0.1Hz to 10Hz NoiseVoltage Noise vs Frequency Channel Separation vs Frequency
FREQUENCY (Hz)
10
30
50
70
20
100
RMS VOLTAGE NOISE DENSITY (nV/√Hz)
10k
LT1457 • TPC07
3 10 30 100 300 1k 3k

1/f CORNER = 28Hz

V
S
= ±15V
T
A
= 25°C
V
S
= ±15V
T
A
= 25°C
TIME (SECONDS)
NOISE VOLTAGE (1µV/DIV)
10
LT1457 • TPC08
024 86
FREQUENCY (Hz)
60
100
80
140
120
160
CHANNEL SEPARATION (dB)
1M
LT1457 • TPC09
1 10 100 1k 10k 100k

V
S
= ±15V
T
A
= 25°C
V
IN
= 20V
P-P
TO 5kHz
R
L
= 2k

LIMITED BY
THERMAL
INTERACTION AT
DC = 132dB

LIMITED BY PIN TO
PIN CAPACITANCE

R
S
= 10Ω

R
S
= 1k
INPUT OFFSET VOLTAGE (mV)
–0.8
PERCENT OF UNITS
12
15
18
0.8
LT1457 • TPC04
9
6
0
–0.4
0
0.4
3
24
21
–0.6
–0.2
0.2
0.6
V
S
= ±15V
T
A
= 25°C
900 DUALS
(1800 OP AMPS)
TESTED FROM 3
RUNS