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參數(shù)資料
| 型號： | AD704 |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | Quad Picoampere Input Current Bipolar Op Amp(輸入微微安培電流雙極性四運放) |
| 中文描述： | 四Picoampere輸入電流雙極運算放大器（輸入微微安培電流雙極性四運放） |
| 文件頁數(shù)： | 7/8頁 |
| 文件大?。?/td> | 403K |
| 代理商： | AD704 |
AD704
REV. A
–7–
__
R1
___
RG
INSTRUMENTATION AMPLIFIER GAIN = 1 +R2
ALL RESISTORS METAL FILM, 1%
1/4
AD704
1/4
AD704
1/4
AD704
1/4
AD704
OPTIONAL BALANCE RESISTOR
NETWORKS CAN BE REPLACED
WITH A SHORT
CAPACITORS C2 AND C4 ARE
SOUTHERN ELECTRONICS MPCC,
POLYCARBONATE,
±
5%, 50 VOLT
0.01
μ
F
C6
R11
2M
OUTPUT
C3
1M
R9
C4
1M
R8
0.01
μ
F
C5
C2
1M
R7
1M
R6
C1
0.1
μ
F
+V
S
0.1
μ
F
–V
S
GAIN TRIM
(500k POT)
49.9k
R2
6.34k
R1
6.34k
R3
OPTIONAL
AC CMRR TRIM
2.4k
R5
47.5k
R4
DC
CMRR
TRIM
(5k POT)
Ct
G
R
+V
IN
–V
IN
=
____1
R8 C3C4
R8 = R9
Q =
C34
R6 = R7
=
____1
R6 C1C2
Q =
1
ω
C12
R10
2M
ω
Figure 24. Gain of 10 Instrumentation Amplifier with Post Filtering
The instrumentation amplifier with post filtering (Figure 24)
combines two applications which benefit greatly from the
AD704. This circuit achieves low power and dc precision over
temperature with a minimum of components.
The instrumentation amplifier circuit offers many performance
benefits including BiFET level input bias currents, low input
offset voltage drift and only 1.2 mA quiescent current. It will
operate for gains G
≥
2
,
and at lower gains it will benefit from
the fact that there is no output amplifier offset and noise
contribution as encountered in a 3 op amp design. Good low
frequency CMRR is achieved even without the optional AC
CMRR trim (Figure 25
).
Table I provides resistance values for
3 common circuit gains. For other gains, use the following
equations:
R
2
= R
4 +
R
5
=
49.9
k
R
1
=
R
3
=
49.9
k
0.9
G
1
Max Value of R
G
=
99.8
k
0.06
G
C
t
≈
1
2
π
(
R
3)5
×
10
5
Table I. Resistance Values for Various Gains
Circuit Gain
(G)
R
G
(Max Value
of Trim Potentiometer)
Bandwidth
(–3 dB), Hz
R1 & R3
10
100
1,000
6.34 k
526
56.2
166 k
16.6 k
1.66 k
50k
5k
0.5k
160
140
120
100
80
60
40
20
0
1
10
100
1k
10k
FREQUENCY – Hz
C
GAIN = 10, 0.2V p-p COMMON-MODE INPUT
TYPICAL MONOLITHIC IN AMP
CIRCUIT TRIMMED
USING CAPACITOR Ct
WITHOUT CAPACITOR Ct
Figure 25. Common-Mode Rejection vs. Frequency with
and without Capacitor C
t
10
0%
50μs
2V
100
90
Figure 23b. Unity Gain Inverter
Large Signal Pulse Response,
C
L
= 1,000 pF
10
0%
5μS
20mV
100
90
Figure 23c. Unity Gain Inverter
Small Signal Pulse Response,
C
L
= 100 pF
10
0%
5μS
20mV
100
90
Figure 23d. Unity Gain Inverter Small
Signal Pulse Response, C
L
= 1,000 pF
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
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| AD704_02 | 制造商:AD 制造商全稱:Analog Devices 功能描述:Quad Picoampere Input Current Bipolar Op Amp |
| AD704-00E | 功能描述:SENSOR MAG SW 20G STANDRD 8-MSOP 制造商:nve corp/sensor products 系列:AD 包裝:管件 零件狀態(tài):有效 功能:全極開關(guān) 技術(shù):霍爾效應(yīng) 極化:任意一種 感應(yīng)范圍:±2.5mT 跳閘，±1.1mT 釋放 測試條件:-40°C ~ 125°C 電壓 - 電源:4.5 V ~ 30 V 電流 - 電源（最大值）:4.5mA 電流 - 輸出（最大值）:20mA 輸出類型:開路集電極 特性:- 工作溫度:-40°C ~ 125°C（TA） 封裝/外殼:8-TSSOP，8-MSOP（0.118"，3.00mm 寬） 供應(yīng)商器件封裝:8-MSOP 標準包裝:1,000 |
| AD704-02E | 功能描述:SENSOR MAG SW 20G STNDRD 8-SOIC 制造商:nve corp/sensor products 系列:AD 包裝:管件 零件狀態(tài):有效 功能:全極開關(guān) 技術(shù):霍爾效應(yīng) 極化:任意一種 感應(yīng)范圍:±2.5mT 跳閘，±1.1mT 釋放 測試條件:-40°C ~ 125°C 電壓 - 電源:4.5 V ~ 30 V 電流 - 電源（最大值）:4.5mA 電流 - 輸出（最大值）:20mA 輸出類型:開路集電極 特性:- 工作溫度:-40°C ~ 125°C（TA） 封裝/外殼:8-SOIC（0.154"，3.90mm 寬） 供應(yīng)商器件封裝:8-SOIC 標準包裝:1,000 |
| AD704AN | 制造商:Rochester Electronics LLC 功能描述: 制造商:Analog Devices 功能描述: |
| AD704AQ | 制造商:AD 制造商全稱:Analog Devices 功能描述:Quad Picoampere Input Current Bipolar Op Amp |
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