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參數(shù)資料
型號: AD8226BRZ-R7
廠商: Analog Devices Inc
文件頁數(shù): 16/28頁
文件大?。?/td> 0K
描述: IC INSTR AMP RRO +/-18 8SOIC
標準包裝: 1,000
放大器類型: 儀表
電路數(shù): 1
輸出類型: 滿擺幅
轉(zhuǎn)換速率: 0.6 V/µs
-3db帶寬: 1.5MHz
電流 - 輸入偏壓: 20nA
電壓 - 輸入偏移: 100µV
電流 - 電源: 350µA
電流 - 輸出 / 通道: 13mA
電壓 - 電源,單路/雙路(±): 2.2 V ~ 36 V,±1.35 V ~ 18 V
工作溫度: -40°C ~ 125°C
安裝類型: 表面貼裝
封裝/外殼: 8-SOIC(0.154",3.90mm 寬)
供應商設(shè)備封裝: 8-SO
包裝: 帶卷 (TR)
Data Sheet
AD8226
Rev. C | Page 23 of 28
APPLICATIONS INFORMATION
DIFFERENTIAL DRIVE
+IN
–IN
REF
AD8226
VBIAS
R
+
OP AMP
+OUT
–OUT
07036-
009
R
RECOMMENDED OP AMPS: AD8515, AD8641, AD820.
RECOMMENDED R V
ALUES: 5k to 20k.
Figure 64. Differential Output Using an Op Amp
Figure 64 shows how to configure the AD8226 for differ-
ential output.
The differential output is set by the following equation:
VDIFF_OUT = VOUT+ VOUT = Gain × (VIN+ VIN)
The common-mode output is set by the following equation:
VCM_OUT = (VOUT+ VOUT)/2= VBIAS
The advantage of this circuit is that the dc differential accuracy
depends on the AD8226, not on the op amp or the resistors. In
addition, this circuit takes advantage of the precise control that the
AD8226 has of its output voltage relative to the reference voltage.
Although the dc performance and resistor matching of the op amp
affect the dc common-mode output accuracy, such errors are
likely to be rejected by the next device in the signal chain and
therefore typically have little effect on overall system accuracy.
Tips for Best Differential Output Performance
For best ac performance, an op amp with at least a 2 MHz gain
bandwidth and a 1 V/s slew rate is recommended. Good choices
for op amps are the AD8641, AD8515, and AD820.
Keep trace lengths from the resistors to the inverting terminal
of the op amp as short as possible. Excessive capacitance at this
node can cause the circuit to be unstable. If capacitance cannot
be avoided, use lower value resistors.
For best linearity and ac performance, a minimum positive
supply voltage (+VS) is required. Table 9 shows the minimum
supply voltage required for optimum performance. In this mode,
VCM_MAX indicates the maximum common-mode voltage expected
at the input of the AD8226.
Table 9. Minimum Positive Supply Voltage
Temperature
Equation
Less than 10°C
+V
S > (VCM_MAX + VBIAS)/2 + 1.4 V
10°C to 25°C
+V
S > (VCM_MAX + VBIAS)/2 + 1.25 V
More than 25°C
+V
S > (VCM_MAX + VBIAS)/2 + 1.1 V
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AD8226BRZ-RL 功能描述:IC INSTR AMP RRO +/-18 8SOIC 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:0.6 V/µs 增益帶寬積:1MHz -3db帶寬:- 電流 - 輸入偏壓:2pA 電壓 - 輸入偏移:1000µV 電流 - 電源:85µA 電流 - 輸出 / 通道:20mA 電壓 - 電源,單路/雙路(±):1.8 V ~ 6 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) 供應商設(shè)備封裝:14-SOICN 包裝:剪切帶 (CT) 產(chǎn)品目錄頁面:680 (CN2011-ZH PDF) 其它名稱:MCP6L04T-E/SLCT
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