LTC1250MJ8(RevA) 查看數據表（PDF） - Linear Technology
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LTC1250MJ8 Datasheet PDF : 8 Pages
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TYPICAL PERFOR A CE CHARACTERISTICS
LTC1250
Output Swing vs Output Current,
±5V Supply
5
4 VS = ±5V
3
2
1
0
–1
–2
–3
–4
–5
0.01
0.1
1
10
OUTPUT CURRENT (mA)
LTC1250 G16
Output Swing vs Output Current,
Single 5V Supply
6
VS = SINGLE 5V
5
4
3
2
1
0
0.01
0.1
1
10
OUTPUT CURRENT (mA)
LTC1250 G17
Short-Circuit Current
vs Temperature
40
VS = ±15V
30
20
VOUT = V –
10
0
–10
– 20
VOUT = V +
– 30
– 40
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
LTC1250 G18
TEST CIRCUITS
Offset Test Circuit
100pF
100k
5V
2– 7
10Ω
LTC1250
6
OUTPUT
3+
4
–5V
1250 TC01
DC to 10Hz Noise Test Circuit
100pF
(for DC to 1Hz Multiply All Capacitor Values by 10)
100k
5V
5V
2– 7
10Ω
LTC1250
3+
4
6
800k
2
–8
1/2
3
LT1057
+
4
1
800k
0.04µF 6 –
800k
1/2
LT1057
5+
7
OUTPUT
–5V
0.02µF
–5V
0.01µF
1250 TC02
APPLICATI S I FOR ATIO
Input Noise
The LTC1250, like all CMOS amplifiers, exhibits two types
of low frequency noise: thermal noise and 1/f noise. The
LTC1250 uses several design modifications to minimize
these noise sources. Thermal noise is minimized by rais-
ing the gM of the front-end transistors by running them at
high bias levels and using large transistor geometries. 1/f
noise is combated by optimizing the zero-drift nulling loop
to run at twice the 1/f corner frequency, allowing it to
reduce the inherently high CMOS 1/f noise to near thermal
levels at low frequencies. The resultant noise spectrum is
quite low at frequencies below the internal 5kHz clock
80
VS = ±5V
70
RS = 10Ω
OP-27 OP-07
60
50
LTC1250
40
30
20
10
0
0.01
0.1
1
FREQUENCY (Hz)
LTC1250 F01
Figure 1. Voltage Noise vs Frequency
5
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