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參數(shù)資料
| 型號： | OP471GS-REEL |
| 廠商： | Analog Devices Inc |
| 文件頁數(shù)： | 5/16頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC OPAMP GP 6.5MHZ QUAD 16SOIC |
| 標準包裝： | 1,000 |
| 放大器類型： | 通用 |
| 電路數(shù)： | 4 |
| 轉(zhuǎn)換速率： | 8 V/µs |
| 增益帶寬積： | 6.5MHz |
| 電流 - 輸入偏壓： | 25nA |
| 電壓 - 輸入偏移： | 1000µV |
| 電流 - 電源： | 9.2mA |
| 電壓 - 電源，單路/雙路(±)： | ±4.5 V ~ 18 V |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 16-SOIC（0.295"，7.50mm 寬） |
| 供應商設備封裝： | 16-SOIC W |
| 包裝： | 帶卷 (TR) |
REV. A
OP471
–13–
Low Phase Error Amplifier
The simple amplifier depicted in Figure 18 utilizes monolithic
matched operational amplifiers and a few resistors to substan-
tially reduce phase error compared to conventional amplifier
designs. At a given gain, the frequency range for a specified phase
accuracy is over a decade greater than for a standard single op
amp amplifier.
The low phase error amplifier performs second-order frequency
compensation through the response of op amp A2 in the feed-
back loop of A1. Both op amps must be extremely well matched
in frequency response. At low frequencies, the A1 feedback loop
forces V2/(K1 + 1) = VIN. The A2 feedback loop forces Vo/(K1 +1)
= V2/(K1 + 1) yielding an overall transfer function of VO/VIN =
K1 + 1. The dc gain is determined by the resistor divider at
the output, VO, and is not directly affected by the resistor divider
around A2. Note that similar to a conventional single op amp
amplifier, the dc gain is set by resistor ratios only. Minimum
gain for the low phase error amplifier is 10.
Figure 19 compares the phase error performance of the low
phase error amplifier with a conventional single op amp amplifier
and a cascaded two-stage amplifier. The low phase error amplifier
shows a much lower phase error, particularly for frequencies where
/
T < 0.1. For example, phase error of –0.1
∞ occurs at 0.002 / T
for the single op amp amplifier, but at 0.11 /
T for the low
phase error amplifier.
For more detailed information on the low phase error amplifier,
see Application Note AN-107.
R2
1/4
OP471E
A2
R1
VO = (K1 + 1) VIN
1/4
OP471E
A1
R1
K1
VO
R2
K1
VIN
R2 = R1
ASSUME: A1 AND A2 ARE MATCHED.
AO (s) =
T
s
V2
Figure 18. Low Phase Error Amplifier
FREQUENCY RATIO – 1/ ,
/ T
0
0.001
PHASE
SHIFT
–
Degrees
–1
–2
–3
–4
–5
0.01
0.1
1
0.005
0.05
0.5
–6
–7
SINGLE OP AMP
(CONVENTIONAL
DESIGN)
CASCADED
(TWO STAGES)
LOW-PHASE ERROR
AMPLIFIER
Figure 19. Phase Error Comparison
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| OP471GSZ | 功能描述:IC OPAMP GP 6.5MHZ QUAD 16SOIC RoHS:是 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 標準包裝:1 系列:- 放大器類型:通用 電路數(shù):4 輸出類型:滿擺幅 轉(zhuǎn)換速率:0.028 V/µs 增益帶寬積:105kHz -3db帶寬:- 電流 - 輸入偏壓:3nA 電壓 - 輸入偏移:100µV 電流 - 電源:3.3µA 電流 - 輸出 / 通道:12mA 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:14-TSSOP（0.173"，4.40mm 寬） 供應商設備封裝:14-TSSOP 包裝:剪切帶 (CT) 其它名稱:OP481GRUZ-REELCT |
| OP471GSZ-REEL | 功能描述:IC OPAMP GP 6.5MHZ QUAD 16SOIC RoHS:是 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 標準包裝:150 系列:- 放大器類型:音頻 電路數(shù):2 輸出類型:- 轉(zhuǎn)換速率:5 V/µs 增益帶寬積:12MHz -3db帶寬:- 電流 - 輸入偏壓:100nA 電壓 - 輸入偏移:500µV 電流 - 電源:6mA 電流 - 輸出 / 通道:50mA 電壓 - 電源，單路/雙路(±):4 V ~ 32 V，±2 V ~ 16 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:8-TSSOP（0.173"，4.40mm 寬） 供應商設備封裝:8-TSSOP 包裝:管件 |
| OP471K | 制造商:Ohmite Mfg Co 功能描述: |
| OP471P | 制造商:AD 制造商全稱:Analog Devices 功能描述:High Speed, Low Noise Quad Operational Amplifier |
| OP471S | 制造商:AD 制造商全稱:Analog Devices 功能描述:High Speed, Low Noise Quad Operational Amplifier |
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