參數(shù)資料
型號(hào)： OP-37AJG
廠商： TEXAS INSTRUMENTS INC
元件分類： 運(yùn)算放大器
英文描述： OP-AMP, 60 uV OFFSET-MAX, 63 MHz BAND WIDTH, CDIP8
封裝： CERAMIC, DIP-8
文件頁(yè)數(shù)： 10/24頁(yè)
文件大?。?/td> 391K
代理商： OP-37AJG
OP27A, OP27C, OP27E, OP27G
OP37A, OP37C, OP37E, OP37G
LOW-NOISE HIGH-SPEED PRECISION OPERATIONAL-AMPLIFIER
SLOS100C – FEBRUARY 1989 – REVISED SEPTEMBER 2000
18
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
APPLICATION INFORMATION
noise testing (continued)
When measuring noise on a large number of units, a noise-voltage density test is recommended. A 10-Hz
noise-voltage density measurement correlates well with a 0.1-Hz to 10-Hz peak-to-peak noise reading since
both results are determined by the white noise and the location of the 1/f corner frequency.
Figure 35 shows a circuit measuring current noise and the formula for calculating current noise.
+
–
10k
Vno
100
500 k
500 k
[Vno2 – (130 nV)2]1/2
1 M
× 100
In =
Figure 35. Current Noise Test Circuit and Formula
offset voltage adjustment
The input offset voltage and temperature coefficient of the OP27 and OP37 are permanently trimmed to a low
level at wafer testing. However, if further adjustment of VIO is necessary, using a 10-k nulling potentiometer
as shown in Figure 36 does not degrade the temperature coefficient
αVIO. Trimming to a value other than zero
creates an
αVIO of VIO/300 V/°C. For example, if VIO is adjusted to 300 V, the change in αVIO is 1 V/°C.
The adjustment range with a 10-k
potentiometer is approximately ±2.5 mV. If a smaller adjustment range is
needed, the sensitivity and resolution of the nulling can be improved by using a smaller potentiometer in
conjunction with fixed resistors. The example in Figure 37 has an approximate null range of
±200 V.
+
–
–15 V
Output
2
3
7
8
4
1
Input
6
15 V
10 k
–15 V
Output
2
3
7
8
4
1
Input
6
4.7 k
Figure 36. Standard Input Offset
Voltage Adjustment
Figure 37. Input Offset Voltage Adjustment With
Improved Sensitivity
15 V
1 k
4.7 k
offset voltage and drift
Unless proper care is exercised, thermoelectric effects caused by temperature gradients across dissimilar
metals at the contacts to the input terminals can exceed the inherent temperature coefficient
∝VIO of the
amplifier. Air currents should be minimized, package leads should be short, and the two input leads should be
close together and at the same temperature.
相關(guān)PDF資料
PDF描述
OP-37EP OP-AMP, 60 uV OFFSET-MAX, 63 MHz BAND WIDTH, PDIP8
OP-37CJG OP-AMP, 300 uV OFFSET-MAX, 63 MHz BAND WIDTH, CDIP8
OP-37GP OP-AMP, 220 uV OFFSET-MAX, 63 MHz BAND WIDTH, PDIP8
OP-47GT OP-AMP, 220 uV OFFSET-MAX, 70 MHz BAND WIDTH, MBCY8
OP-47CD/883B OP-AMP, 300 uV OFFSET-MAX, 70 MHz BAND WIDTH, CDIP8
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
OP-37AL 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Voltage-Feedback Operational Amplifier
OP37AP 制造商:TI 制造商全稱:Texas Instruments 功能描述:LOW-NOISE HIGH-SPEED PRECISION OPERATIONAL AMPLIFIERS
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