參數(shù)資料
型號(hào): LT1250
廠(chǎng)商: Linear Technology Corporation
英文描述: Octal D-Type Edge Triggered Flip-Flops with 3-State Outputs 20-SOIC 0 to 70
中文描述: 極低噪聲零漂移放大器橋
文件頁(yè)數(shù): 5/8頁(yè)
文件大?。?/td> 230K
代理商: LT1250
5
LTC1250
C
HARA TERISTICS
U
A
TYPICAL PERFOR
CE
Output Swing vs Output Current,
±
5V Supply
Short-Circuit Current
vs Temperature
Output Swing vs Output Current,
Single 5V Supply
TEST CIRCUITS
Offset Test Circuit
+
5V
100pF
100k
7
6
4
3
2
–5V
OUTPUT
1250 TC01
LTC1250
10
U
S
A
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 g
M
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
O
PPLICATI
U
U
Figure 1. Voltage Noise vs Frequency
FREQUENCY (Hz)
20
V
H
30
40
50
80
0.01
1
LTC1250 F01
0
0.1
70
60
10
V
S
= ±5V
R
S
= 10
LTC1250
OP-07
OP-27
OUTPUT CURRENT (mA)
0.01
–1
O
0
1
2
3
0.1
1
10
LTC1250 G16
–2
–3
–4
–5
4
5
V
S
= ±5V
OUTPUT CURRENT (mA)
0.01
2
O
3
4
5
0.1
1
10
LTC1250 G17
1
0
6
V
S
= SINGLE 5V
TEMPERATURE (°C)
–50
0
10
20
25
LTC1250 G18
–10
–20
–25
0
50
–30
–40
40
75
100
125
S
30
V
S
= ±15V
V
OUT
= V
V
OUT
= V
+
DC to 10Hz Noise Test Circuit
(for DC to 1Hz Multiply All Capacitor Values by 10)
100pF
100k
OUTPUT
1250 TC02
+
5V
7
6
4
3
2
–5V
LTC1250
10
+
7
5
6
0.02
μ
F
800k
+
3
2
800k
800k
0.04
μ
F
0.01
μ
F
1/2
LT1057
5V
8
1
4
–5V
L1/2
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