LT1007, LT1007A, LT1037, LT1037A
LOW-NOISE, HIGH-SPEED, PRECISION OPERATIONAL AMPLIFIERS
SLOS017C – D3195, FEBRUARY 1989 – REVISED JANUARY 1993
APPLICATION INFORMATION
The sine wave generator application shown below, utilizes the low-noise and low-distortion characteristics of
the LT1037.
430 Ω
2
–
6
LT1037
+
Output
3
C
#327 Lamp
R
C
R
TOTAL HARMONIC DISTORTION ≤ 0.0025%
NOISE ≤ 0.001%
AMPLITUDE = ±8 V
1
RC
f
2
π
R =1591.5Ω ±0.1 %
C = 0.1 µF ±0.1 %
OUTPUT FREQUENCY = 1.000 kHz FOR VALUES GIVEN ±0.4%
Figure 41. Ultra-Pure 1-kHz Sine-Wave Generator
EQUIVALENT INPUT NOISE VOLTAGE
OVER A 10-SECOND PERIOD
340 kΩ 15 kΩ 20 kΩ
f = 0.1 Hz to 10 Hz
1%
5%
Trim
365 Ω
1%
15 V
7
2
–
6
LT1037
Output
+
4
3
IN+
–15 V
RN60C Film Resistors
The high gain and wide bandwidth of the LT1037 and (LT1007)
is useful in low-frequency high-closed-loop-gain amplifier
applications.A typical precision operational amplifier may have
an open loop gain of one million with 500 kHz bandwidth. As the
gain error plot shows, this device is capable of 0.1% amplifying
accuracy up to 0.3 Hz only. Even instrumentation range signals
can vary at a faster rate. The LT1037’s gain precision –
bandwidth product is 200 times higher, as shown.
0
1
2
3
4
5
6
7
8
9
10
t – Time – s
Figure 42
Figure 43. Gain 1000 Amplifier With
0.01% Accuracy, DC to 5 Hz
20
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TI [ TEXAS INSTRUMENTS ]
