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| 型号： | AD8606ARMZ-REEL |
| 厂商： | Analog Devices Inc |
| 文件页数： | 13/24页 |
| 文件大小： | 0K |
| 描述： | IC OPAMP GP R-R CMOS 10MHZ 8MSOP |
| 产品培训模块： | Pulse Oximetry Solutions |
| 标准包装： | 1 |
| 系列： | DigiTrim® |
| 放大器类型： | 通用 |
| 电路数： | 2 |
| 输出类型： | 满摆幅 |
| 转换速率： | 5 V/µs |
| 增益带宽积： | 10MHz |
| 电流 - 输入偏压： | 0.2pA |
| 电压 - 输入偏移： | 80µV |
| 电流 - 电源： | 1mA |
| 电流 - 输出 / 通道： | 80mA |
| 电压 - 电源，单路/双路(±)： | 2.7 V ~ 5.5 V |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-TSSOP，8-MSOP（0.118"，3.00mm 宽） |
| 供应商设备封装： | 8-MSOP |
| 包装： | 标准包装 |
| 产品目录页面： | 767 (CN2011-ZH PDF) |
| 其它名称： | AD8606ARMZREELDKR |
AD8605/AD8606/AD8608
Data Sheet
Rev. N | Page 20 of 24
INSTRUMENTATION AMPLIFIERS
The low offset voltage and low noise of the AD8605 make it an
ideal amplifier for instrumentation applications.
Difference amplifiers are widely used in high accuracy circuits
to improve the common-mode rejection ratio. Figure 54 shows
a simple difference amplifier. Figure 55 shows the common-
mode rejection for a unity gain configuration and for a gain of 10.
Making (R4/R3) = (R2/R1) and choosing 0.01% tolerance yields
a CMRR of 74 dB and minimizes the gain error at the output.
AD8605
5V
V2
V1
R1
1k
R3
1k
R2
10k
R4
10k
VOUT
R4
R3
R2
R1
=
VOUT =
(V2 – V1)
R2
R1
02731-
053
Figure 54. Difference Amplifier, AV = 10
FREQUENCY (Hz)
120
100
0
100
10M
1k
CM
RR
(
d
B)
10k
100k
1M
60
40
20
80
AV = 10
VSY = ±2.5V
AV = 1
02731-
054
Figure 55. Difference Amplifier CMRR vs. Frequency
DAC CONVERSION
The low input bias current and offset voltage of the AD8605
make it an excellent choice for buffering the output of a current
output DAC.
Figure 56 shows a typical implementation of the AD8605 at the
output of a 12-bit DAC.
The DAC8143 output current is converted to a voltage by the
feedback resistor. The equivalent resistance at the output of the
DAC varies with the input code, as does the output capacitance.
R2
AD8605
VOS
RF
CF
R2
V+
V–
02731-
055
R
VREF
Figure 56. Simplified Circuit of the DAC8143 with AD8605 Output Buffer
To optimize the performance of the DAC, insert a capacitor in
the feedback loop of the AD8605 to compensate the amplifier
for the pole introduced by the output capacitance of the DAC.
Typical values for CF range from 10 pF to 30 pF; it can be
adjusted for the best frequency response. The total error at the
output of the op amp can be computed by
+
=
1
Req
R
V
E
F
OS
O
where Req is the equivalent resistance seen at the output of the
DAC. As previously mentioned, Req is code dependent and
varies with the input. A typical value for Req is 15 k.
Choosing a feedback resistor of 10 k yields an error of less
than 200 V.
Figure 57 shows the implementation of a dual-stage buffer
at the output of a DAC. The first stage is used as a buffer.
Capacitor C1 with Req creates a low-pass filter, and thus,
provides phase lead to compensate for frequency response.
The second stage of the AD8606 is used to provide voltage
gain at the output of the buffer.
Grounding the positive input terminals in both stages reduces
errors due to the common-mode output voltage. Choosing R1,
R2, and R3 to match within 0.01% yields a CMRR of 74 dB and
maintains minimum gain error in the circuit.
RFB
VDD
DB11
OUT1
AD7545
AGND
RCS
RP
VIN
15V
VOUT
VREF
1/2
AD8606
1/2
AD8606
C1
33pF
02731-
056
R4
5k
R2
10k
R1
10k
R3
20k
Figure 57. Bipolar Operation
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相关代理商/技术参数 |
参数描述 |
|---|---|
| AD8606ARMZ-REEL | 制造商:Analog Devices 功能描述:IC OP-AMP 10MHZ 5V/S MSOP-8 |
| AD8606ARN | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Operational Amplifier |
| AD8606AR-REEL | 功能描述:IC OPAMP GP R-R CMOS 10MHZ 8SOIC RoHS:否 类别:集成电路 (IC) >> Linear - Amplifiers - Instrumentation 系列:DigiTrim® 标准包装:1,000 系列:- 放大器类型:电压反馈 电路数:4 输出类型:满摆幅 转换速率:33 V/µs 增益带宽积:20MHz -3db带宽:30MHz 电流 - 输入偏压:2nA 电压 - 输入偏移:3000µV 电流 - 电源:2.5mA 电流 - 输出 / 通道:30mA 电压 - 电源，单路/双路(±):4.5 V ~ 16.5 V，±2.25 V ~ 8.25 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:14-SOIC（0.154"，3.90mm 宽） 供应商设备封装:14-SOIC 包装:带卷 (TR) |
| AD8606AR-REEL7 | 功能描述:IC OPAMP GP R-R CMOS 10MHZ 8SOIC RoHS:否 类别:集成电路 (IC) >> Linear - Amplifiers - Instrumentation 系列:DigiTrim® 标准包装:1,000 系列:- 放大器类型:电压反馈 电路数:4 输出类型:满摆幅 转换速率:33 V/µs 增益带宽积:20MHz -3db带宽:30MHz 电流 - 输入偏压:2nA 电压 - 输入偏移:3000µV 电流 - 电源:2.5mA 电流 - 输出 / 通道:30mA 电压 - 电源，单路/双路(±):4.5 V ~ 16.5 V，±2.25 V ~ 8.25 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:14-SOIC（0.154"，3.90mm 宽） 供应商设备封装:14-SOIC 包装:带卷 (TR) |
| AD8606ARZ | 功能描述:IC OPAMP GP R-R CMOS 10MHZ 8SOIC RoHS:是 类别:集成电路 (IC) >> Linear - Amplifiers - Instrumentation 系列:DigiTrim® 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 |
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