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參數(shù)資料
| 型號(hào)： | LT1024CN#PBF |
| 廠商： | Linear Technology |
| 文件頁(yè)數(shù)： | 10/12頁(yè) |
| 文件大?。?/td> | 0K |
| 描述： | IC PREC OP-AMP UNVRSL DUAL 14DIP |
| 標(biāo)準(zhǔn)包裝： | 25 |
| 放大器類型： | 通用 |
| 電路數(shù)： | 2 |
| 轉(zhuǎn)換速率： | 0.2 V/µs |
| 電流 - 輸入偏壓： | 30pA |
| 電壓 - 輸入偏移： | 20µV |
| 電流 - 電源： | 380µA |
| 電壓 - 電源，單路/雙路(±)： | 2.4 V ~ 40 V，±1.2 V ~ 20 V |
| 工作溫度： | 0°C ~ 70°C |
| 安裝類型： | 通孔 |
| 封裝/外殼： | 14-DIP（0.300"，7.62mm） |
| 供應(yīng)商設(shè)備封裝： | 14-PDIP |
| 包裝： | 管件 |
7
LT1024
1024fa
The LT1024 may be inserted directly into OP-10, OP-207
or 0P227 sockets with or without removal of external
nulling components.
The LT1024 is specified over a wide range of power supply
voltages from ±2V to ±18V. Operation with lower supplies
is possible down to ±1.2V (two NiCad batteries).
Advantages of Matched Dual Op Amps
In many applications, the performance of a system
depends on the matching between two operational
amplifiers rather than the individual characteristics of the
two op amps. Two or three op amp instrumentation
amplifiers, tracking voltage references, and low drift active
filters are some of the circuits requiring matching between
two op amps.
The well-known triple op amp configuration illustrates
these concepts. Output offset is a function of the dif-
ference between the offsets of the two halves of the
LT1024. This error cancellation principle holds for a
considerable number of input-referred parameters in
addition to offset voltage and its drift with temperature.
Input bias current will be the average of the two
noninverting input currents (IB+ ). The difference between
these two currents (IOS+) is the offset current of the
instrumentation amplifier. Common mode and power
supply rejections will be dependent only on the match
between the two amplifiers (assuming perfect resistor
matching).
The concepts of common mode and power supply rejec-
tion ratio match (CMRR and PSRR) are best demon-
strated with a numerical example:
Assume CMRRA = +1.0V/V or 120dB
and CMRRB = +0.5V/V or 126dB,
then CMRR = 0.5V/V or 126dB
if CMRRB = –0.5V/V, which is still 126dB,
then CMRR = 1.5V/V or 116.5dB.
Typical performance of the instrumentation amplifier:
Input offset voltage = 25V.
Input bias current = 30pA.
Input resistance = 1012.
Input offset current = 30pA.
Input noise = 0.7VP-P.
Power bandwidth (VO = ±10V) = 80kHz.
Clearly, the LT1024, by specifying and guaranteeing all of
these matching parameters, can significantly improve the
performance of matching dependent circuits.
Three Op Amp Instrumentation Amplifier
LT1024 AI01
TRIM R8 FOR GAIN
TRIM R9 FOR DC COMMON MODE REJECTION
TRIM R10 FOR AC COMMON MODE REJECTION
3
2
3
4
11
10
5
6
7
4
6
7
12
OUTPUT
13
14
R4
100
1%
R6
10k
1%
R5
100
1%
R1
10k
1%
R3
2.1k
1%
R7
9.76k
1%
R2
10k
1%
R10
100k
R9
500
R8
200
C1
100pF
LT1037
A
1/2 LT1024
B
1/2 LT1024
–INPUT
+INPUT
15V
–15V
15V
–15V
GAIN = 1000
–
+
–
+
–
+
APPLICATIO S I FOR ATIO
WU
UU
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