LT1007, LT1007A, LT1037, LT1037A
LOW-NOISE, HIGH-SPEED, PRECISION OPERATIONAL AMPLIFIERS
SLOS017C – D3195, FEBRUARY 1989 – REVISED JANUARY 1993
APPLICATION INFORMATION
GAIN ERROR
vs
FREQUENCY
CLOSED LOOP GAIN = 1000
1
Typical
Precision
Operational
Amplifier
15 V
365 Ω
1%
10 MΩ
5%
LT1007
0.1
7
3
2
IN +
15 kΩ
+
1%
8
Output
LT1007
LT1037
–
4
0.01
–15 V
Positive feedback to one of the nulling terminals creates
approximately 5 µV of hysteresis. Output can sink 16 mA.
CLOSED LOOP GAIN
OPEN LOOP GAIN
GAIN ERROR
1
0.001
Input offset voltage is typically changed less than 5 µV due to
the feedback.
0.1
10
100
f – Frequency – Hz
Figure 44.
Figure 45. Microvolt Comparator
With Hysteresis
10 kΩ
340 kΩ 1% 20 kΩ 5%
Trim
2
–
0.01 µF
7.8 kΩ
6
LT1007
+
100 kΩ
3
2
15 V
15 Ω
5%
–
100 Ω
2
3
365 Ω 1%
Output ±10 V
–
0.033 µF
6
7
LT1037
+
6
3
15 Ω
5%
LT1037
100 pF
R
L
Output
+
4
300 Ω
IN +
47 kΩ
–15 V
All Resistors Metal Film
The addition of the LT1007 doubles the amplifier’s output drive
to ±33 mA. Gain accuracy is 0.02%, slightly degraded
comparedtoabovebecauseofselfheatingoftheLT1037under
load.
Mag Phono
Input
Figure 46. Precision Amplifier Drives
Figure 47. Phono Preamplifier
300-Ω Load to ± 10 V
21
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TI [ TEXAS INSTRUMENTS ]
