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參數(shù)資料
| 型號： | AD8618ARZ-REEL7 |
| 廠商： | Analog Devices Inc |
| 文件頁數(shù)： | 3/20頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC OPAMP GP R-R CMOS QUAD 14SOIC |
| 標準包裝： | 1,000 |
| 系列： | DigiTrim® |
| 放大器類型： | 通用 |
| 電路數(shù)： | 4 |
| 輸出類型： | 滿擺幅 |
| 轉(zhuǎn)換速率： | 12 V/µs |
| 增益帶寬積： | 24MHz |
| 電流 - 輸入偏壓： | 0.2pA |
| 電壓 - 輸入偏移： | 23µV |
| 電流 - 電源： | 1.7mA |
| 電流 - 輸出 / 通道： | 150mA |
| 電壓 - 電源，單路/雙路(±)： | 2.7 V ~ 5.5 V，±1.35 V ~ 2.75 V |
| 工作溫度： | -40°C ~ 125°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 14-SOIC（0.154"，3.90mm 寬） |
| 供應(yīng)商設(shè)備封裝： | 14-SOIC |
| 包裝： | 帶卷 (TR) |
Data Sheet
AD8615/AD8616/AD8618
Rev. F | Page 11 of 20
APPLICATIONS INFORMATION
INPUT OVERVOLTAGE PROTECTION
that allows voltages exceeding the supply to be applied at the input.
It is recommended, however, not to apply voltages that exceed
the supplies by more than 1.5 V at either input of the amplifier.
If a higher input voltage is applied, series resistors should be
used to limit the current flowing into the inputs.
The input current should be limited to <5 mA. The extremely
low input bias current allows the use of larger resistors, which
allows the user to apply higher voltages at the inputs. The use of
these resistors adds thermal noise, which contributes to the overall
output voltage noise of the amplifier.
For example, a 10 kΩ resistor has less than 13 nV/√Hz of
thermal noise and less than 10 nV of error voltage at room
temperature.
OUTPUT PHASE REVERSAL
a phenomenon that occurs when the voltage applied at the input of
the amplifier exceeds the maximum input common mode.
Phase reversal can cause permanent damage to the amplifier
and can create lock ups in systems with feedback loops.
VO
LT
A
GE
(2
V
/D
IV
)
TIME (2ms/DIV)
VIN
VOUT
VS = ±2.5V
VIN = 6V p-p
AV = 1
RL = 10k
04
64
8-
0
36
Figure 36. No Phase Reversal
DRIVING CAPACITIVE LOADS
capacitive loads of up to 500 pF without oscillating, a large amount
of overshoot is present when operating at frequencies above
100 kHz. This is especially true when the amplifier is configured
in positive unity gain (worst case). When such large capacitive
loads are required, the use of external compensation is highly
recommended.
This reduces the overshoot and minimizes ringing, which in
AD8618. One simple technique for compensation is the snubber,
which consists of a simple RC network. With this circuit in place,
output swing is maintained and the amplifier is stable at all gains.
Figure 38 shows the implementation of the snubber, which
reduces overshoot by more than 30% and eliminates ringing
that can cause instability. Using the snubber does not recover
the loss of bandwidth incurred from a heavy capacitive load.
VO
L
T
A
GE
(1
00
m
V
/D
IV
)
TIME (2s/DIV)
VS = ±2.5V
AV = 1
CL = 500pF
0
46
48
-03
7
Figure 37. Driving Heavy Capacitive Loads Without Compensation
V+
200
500pF
V–
VEE
VCC
200mV
–
+
–
04
64
8-
0
38
Figure 38. Snubber Network
VO
L
T
A
GE
(10
0mV
/DI
V
)
TIME (10s/DIV)
VS =±2.5V
AV = 1
RS = 200
CS = 500pF
CL = 500pF
04
64
8-
03
9
Figure 39. Driving Heavy Capacitive Loads Using the Snubber Network
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| AD8619ARUZ-REEL | 功能描述:IC OPAMP GP R-R CMOS LN 14TSSOP RoHS:是 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 標準包裝:2,500 系列:- 放大器類型:通用 電路數(shù):1 輸出類型:滿擺幅 轉(zhuǎn)換速率:0.11 V/µs 增益帶寬積:350kHz -3db帶寬:- 電流 - 輸入偏壓:4nA 電壓 - 輸入偏移:20µV 電流 - 電源:260µA 電流 - 輸出 / 通道:20mA 電壓 - 電源，單路/雙路(±):2.7 V ~ 36 V，±1.35 V ~ 18 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(yīng)商設(shè)備封裝:8-SO 包裝:帶卷 (TR) |
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