LT1007, LT1007A, LT1037, LT1037A

LOW-NOISE, HIGH-SPEED, PRECISION OPERATIONAL AMPLIFIERS

SLOS017C – D3195, FEBRUARY 1989 – REVISED JANUARY 1993

POST OFFICE BOX 655303

20

APPLICATION INFORMATION

The sine wave generator application shown below, utilizes the low-noise and low-distortion characteristics of

the LT1037.

6

R

C

#327 Lamp

3

2

R

C

Output

LT1037

430

Ω

TOTAL HARMONIC DISTORTION

≤ 0.0025%

NOISE

≤ 0.001%

AMPLITUDE =

±8 V

OUTPUT FREQUENCY = 1.000 kHz FOR VALUES GIVEN

±0.4%

f

+

1

2

RC

π

R =1591.5

Ω ±0.1 %

C = 0.1

µF ±0.1 %

Figure 41. Ultra-Pure 1-kHz Sine-Wave Generator

RN60C Film Resistors

4

6

7

2

1%

365

Ω

Output

IN +

– 15 V

15 V

Trim

5%

1%

20 k

Ω

15 k

Ω

340 k

Ω

LT1037

3

f = 0.1 Hz to 10 Hz

t – Time – s

10

8

6

4

2

0

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.

EQUIVALENT INPUT NOISE VOLTAGE

OVER A 10-SECOND PERIOD

9

7

5

3

1

Figure 42

Figure 43. Gain 1000 Amplifier With

0.01% Accuracy, DC to 5 Hz