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參數(shù)資料
| 型號： | OP297GSZ-REEL7 |
| 廠商： | Analog Devices Inc |
| 文件頁數(shù)： | 16/16頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC OPAMP GP 500KHZ DUAL 8SOIC |
| 標準包裝： | 1,000 |
| 放大器類型： | 通用 |
| 電路數(shù)： | 2 |
| 轉(zhuǎn)換速率： | 0.15 V/µs |
| 增益帶寬積： | 500kHz |
| 電流 - 輸入偏壓： | 50pA |
| 電壓 - 輸入偏移： | 80µV |
| 電流 - 電源： | 525µA |
| 電壓 - 電源，單路/雙路(±)： | 4 V ~ 40 V，±2 V ~ 20 V |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 8-SOIC（0.154"，3.90mm 寬） |
| 供應商設(shè)備封裝： | 8-SO |
| 包裝： | 帶卷 (TR) |
OP297
Rev. G | Page 9 of 16
APPLICATIONS INFORMATION
Extremely low bias current over a wide temperature range
makes the OP297 attractive for use in sample-and-hold
amplifiers, peak detectors, and log amplifiers that must operate
over a wide temperature range. Balancing input resistances is
unnecessary with the OP297. Offset voltage and TCVOS are
degraded only minimally by high source resistance, even
when unbalanced.
The input pins of the OP297 are protected against large differen-
tial voltage by back-to-back diodes and current-limiting resistors.
Common-mode voltages at the inputs are not restricted and can
vary over the full range of the supply voltages used.
The OP297 requires very little operating headroom about the
supply rails and is specified for operation with supplies as low as
2 V. Typically, the common-mode range extends to within 1 V
of either rail. The output typically swings to within 1 V of the
rails when using a 10 kΩ load.
AC PERFORMANCE
The ac characteristics of the OP297 are highly stable over its full
operating temperature range. Unity gain small signal response is
shown in Figure 26. Extremely tolerant of capacitive loading on
the output, the OP297 displays excellent response with 1000 pF
loads (see Figure 27).
10
100
90
0%
10
20mV
5s
0
030
0-
0
26
Figure 26. Small Signal Transient Response (CL = 100 pF, AVCL = +1)
5s
20mV
10
0%
100
90
00
30
0-
02
7
Figure 27. Small Signal Transient Response (CL = 1000 pF, AVCL = +1)
5s
20mV
10
0%
100
90
0
03
00
-02
8
Figure 28. Large Signal Transient Response (AVCL = +1)
GUARDING AND SHIELDING
To maintain the extremely high input impedances of the OP297,
care is taken in circuit board layout and manufacturing. Board
surfaces must be kept scrupulously clean and free of moisture.
Conformal coating is recommended to provide a humidity
barrier. Even a clean PCB can have 100 pA of leakage currents
between adjacent traces, therefore guard rings should be used
around the inputs. Guard traces operate at a voltage close to that
on the inputs, as shown in Figure 29, to minimize leakage
currents. In noninverting applications, the guard ring should be
connected to the common-mode voltage at the inverting input.
In inverting applications, both inputs remain at ground, so the
guard trace should be grounded. Guard traces should be placed
on both sides of the circuit board.
UNITY-GAIN FOLLOWER
–
+
1/2
OP297
INVERTING AMPLIFIER
–
+
1/2
OP297
MINI-DIP
BOTTOM VIEW
8
B
1
A
NONINVERTING AMPLIFIER
–
+
1/2
OP297
003
00-
0
29
Figure 29. Guard Ring Layout and Considerations
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| OP297S | 制造商:AD 制造商全稱:Analog Devices 功能描述:Dual Low Bias Current Precision Operational Amplifier |
| OP298 | 制造商:OPTEK 制造商全稱:OPTEK 功能描述:GaAlAs Plastic Infrared Emitting Diodes |
| OP298A | 功能描述:紅外發(fā)射源 High Intensity 890nm RoHS:否 制造商:Fairchild Semiconductor 波長:880 nm 射束角:+/- 25 輻射強度: 最大工作溫度:+ 100 C 最小工作溫度:- 40 C 封裝 / 箱體:Side Looker 封裝:Bulk |
| OP298AA | 功能描述:紅外發(fā)射源 Infrared 875nm RoHS:否 制造商:Fairchild Semiconductor 波長:880 nm 射束角:+/- 25 輻射強度: 最大工作溫度:+ 100 C 最小工作溫度:- 40 C 封裝 / 箱體:Side Looker 封裝:Bulk |
| OP298AB | 功能描述:紅外發(fā)射源 Infrared 875nm RoHS:否 制造商:Fairchild Semiconductor 波長:880 nm 射束角:+/- 25 輻射強度: 最大工作溫度:+ 100 C 最小工作溫度:- 40 C 封裝 / 箱體:Side Looker 封裝:Bulk |
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