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參數(shù)資料
| 型號： | AD8031AR |
| 廠商： | Analog Devices Inc |
| 文件頁數(shù)： | 6/20頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC OPAMP VF R-R LP LDIST 8SOIC |
| 設(shè)計(jì)資源： | High Speed, Precision, Differential AC-Coupled Drive Circuit for AD7625 (CN0080) Single-Ended-to-Differential High Speed Drive Circuit for 16-Bit, 10 MSPS AD7626 ADC (CN0105) |
| 標(biāo)準(zhǔn)包裝： | 98 |
| 放大器類型： | 電壓反饋 |
| 電路數(shù)： | 1 |
| 輸出類型： | 滿擺幅 |
| 轉(zhuǎn)換速率： | 35 V/µs |
| -3db帶寬： | 80MHz |
| 電流 - 輸入偏壓： | 450nA |
| 電壓 - 輸入偏移： | 1000µV |
| 電流 - 電源： | 900µA |
| 電流 - 輸出 / 通道： | 15mA |
| 電壓 - 電源，單路/雙路(±)： | 2.7 V ~ 12 V，±1.35 V ~ 6 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： | 管件 |
AD8031/AD8032
Data Sheet
Rev. G | Page 14 of 20
OUTPUT STAGE, OPEN-LOOP GAIN AND
DISTORTION vs. CLEARANCE FROM POWER
SUPPLY
The AD8031 features a rail-to-rail output stage. The output
transistors operate as common-emitter amplifiers, providing the
output drive current as well as a large portion of the amplifier’s
open-loop gain.
DIFFERENTIAL
DRIVE
FROM
INPUT STAGE
Q37
Q47
Q21
Q20
Q51
Q27
Q68
Q44
Q42
Q48
Q49
Q50
Q43
VOUT
Q38
I1
25A
I2
25A
C9
5pF
C5
1.5pF
I5
25A
I4
25A
R29
300
+
01056-
044
Figure 44. Output Stage Simplified Schematic
The output voltage limit depends on how much current the
output transistors are required to source or sink. For applications
with low drive requirements (for instance, a unity gain follower
driving another amplifier input), the AD8031 typically swings
within 20 mV of either voltage supply. As the required current
load increases, the saturation output voltage increases linearly as
ILOAD × RC
where:
ILOAD is the required load current.
RC is the output transistor collector resistance.
For the AD8031, the collector resistances for both output
transistors are typically 25 Ω. As the current load exceeds the
rated output current of 15 mA, the amount of base drive current
required to drive the output transistor into saturation reaches its
limit, and the amplifier’s output swing rapidly decreases.
The open-loop gain of the AD8031 decreases approximately
linearly with load resistance and depends on the output voltage.
Open-loop gain stays constant to within 250 mV of the positive
power supply, 150 mV of the negative power supply, and then
decreases as the output transistors are driven further into
saturation.
differs from conventional amplifiers. Typically, the distortion
performance of the amplifier degrades as the output voltage
amplitude increases.
Used as a unity gain follower, the output of the AD8031/
AD8032 exhibits more distortion in the peak output voltage
region around VCC 0.7 V. This unusual distortion characteristic is
caused by the input stage architecture and is discussed in detail
in the Input Stage Operation section,
OUTPUT OVERDRIVE RECOVERY
Output overdrive of an amplifier occurs when the amplifier
attempts to drive the output voltage to a level outside its normal
range. After the overdrive condition is removed, the amplifier
must recover to normal operation in a reasonable amount of
within 100 ns from negative overdrive and within 80 ns from
positive overdrive.
RL
50
VIN
VOUT
100ns
1V
VS = ±2.5V
VIN = ±2.5V
RL = 1k TO GND
RF = RG = 2k
RG
RF
01056-
045
Figure 45. Overdrive Recovery
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| AD8031AR-EBZ | 功能描述:BOARD EVAL FOR AD8031AR RoHS:是 類別:編程器，開發(fā)系統(tǒng) >> 評估板 - 運(yùn)算放大器 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:1 系列:- |
| AD8031AR-REEL | 制造商:Analog Devices 功能描述:OP Amp Single Volt Fdbk R-R I/O 制造商:Rochester Electronics LLC 功能描述:SOIC SINGLE LOW POWER OP AMP - Tape and Reel |
| AD8031AR-REEL7 | 制造商:Analog Devices 功能描述:OP Amp Single Volt Fdbk R-R I/O 制造商:Analog Devices 功能描述:OP Amp Single Volt Fdbk R-R I/O ±6V/12V 8-Pin SOIC N T/R |
| AD8031ART | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Voltage-Feedback Operational Amplifier |
| AD8031ART-EBZ | 功能描述:BOARD EVAL FOR AD8031ART RoHS:是 類別:編程器，開發(fā)系統(tǒng) >> 評估板 - 運(yùn)算放大器 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:1 系列:- |
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