参数资料
| 型号： | OP471GS-REEL |
| 厂商： | Analog Devices Inc |
| 文件页数： | 5/16页 |
| 文件大小： | 0K |
| 描述： | IC OPAMP GP 6.5MHZ QUAD 16SOIC |
| 标准包装： | 1,000 |
| 放大器类型： | 通用 |
| 电路数： | 4 |
| 转换速率： | 8 V/µs |
| 增益带宽积： | 6.5MHz |
| 电流 - 输入偏压： | 25nA |
| 电压 - 输入偏移： | 1000µV |
| 电流 - 电源： | 9.2mA |
| 电压 - 电源，单路/双路(±)： | ±4.5 V ~ 18 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-SOIC（0.295"，7.50mm 宽） |
| 供应商设备封装： | 16-SOIC W |
| 包装： | 带卷 (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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相关代理商/技术参数 |
参数描述 |
|---|---|
| OP471GSZ | 功能描述:IC OPAMP GP 6.5MHZ QUAD 16SOIC RoHS:是 类别:集成电路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 标准包装:1 系列:- 放大器类型:通用 电路数:4 输出类型:满摆幅 转换速率:0.028 V/µs 增益带宽积:105kHz -3db带宽:- 电流 - 输入偏压:3nA 电压 - 输入偏移:100µV 电流 - 电源:3.3µA 电流 - 输出 / 通道:12mA 电压 - 电源，单路/双路(±):2.7 V ~ 12 V，±1.35 V ~ 6 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:14-TSSOP（0.173"，4.40mm 宽） 供应商设备封装:14-TSSOP 包装:剪切带 (CT) 其它名称:OP481GRUZ-REELCT |
| OP471GSZ-REEL | 功能描述:IC OPAMP GP 6.5MHZ QUAD 16SOIC RoHS:是 类别:集成电路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 标准包装:150 系列:- 放大器类型:音频 电路数:2 输出类型:- 转换速率:5 V/µs 增益带宽积:12MHz -3db带宽:- 电流 - 输入偏压:100nA 电压 - 输入偏移:500µV 电流 - 电源:6mA 电流 - 输出 / 通道:50mA 电压 - 电源，单路/双路(±):4 V ~ 32 V，±2 V ~ 16 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:8-TSSOP（0.173"，4.40mm 宽） 供应商设备封装:8-TSSOP 包装:管件 |
| OP471K | 制造商:Ohmite Mfg Co 功能描述: |
| OP471P | 制造商:AD 制造商全称:Analog Devices 功能描述:High Speed, Low Noise Quad Operational Amplifier |
| OP471S | 制造商:AD 制造商全称:Analog Devices 功能描述:High Speed, Low Noise Quad Operational Amplifier |
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