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參數(shù)資料
| 型號： | AD648KRZ-REEL7 |
| 廠商： | Analog Devices Inc |
| 文件頁數(shù)： | 2/12頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC OPAMP BIFET 1MHZ DUAL 8SOIC |
| 標(biāo)準(zhǔn)包裝： | 1,000 |
| 放大器類型： | J-FET |
| 電路數(shù)： | 2 |
| 轉(zhuǎn)換速率： | 1.8 V/µs |
| 增益帶寬積： | 1MHz |
| 電流 - 輸入偏壓： | 3pA |
| 電壓 - 輸入偏移： | 300µV |
| 電流 - 電源： | 340µA |
| 電流 - 輸出 / 通道： | 15mA |
| 電壓 - 電源，單路/雙路(±)： | ±4.5 V ~ 18 V |
| 工作溫度： | 0°C ~ 70°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： | 帶卷 (TR) |
AD648
REV. E
–10–
INSTRUMENTATION AMPLIFIER
The AD648J’s maximum input current of 20 pA per amplifier
makes it an excellent building block for the high input impedance
instrumentation amplifier shown in Figure 29. Total current
drain for this circuit is under 600
A. This configuration is
optimal for conditioning differential voltages from high imped-
ance sources.
The overall gain of the circuit is controlled by RG, resulting in
the following transfer function:
VOUT
VIN
= 1+
( R3
+ R4)
RG
Gains of 1 to 100 can be accommodated with gain nonlinearities
of less than 0.01%. The maximum input current is 30 pA over
the common-mode range, with a common-mode impedance of
over 1
× 1012 . The capacitors C1, C2, C3 and C4 compensate
for peaking in the gain over frequency which is caused by input
capacitance.
To calibrate this circuit, first adjust trimmer R1 for common-
mode rejection with 10 V dc applied to the input pins. Next,
adjust R2 for zero offset at VOUT with both inputs grounded.
Trim the circuit a second time for optimal
performance.
The –3 dB small signal bandwidth for this low power instru-
mentation amplifier is 700 kHz for a gain of 1 and 10 kHz for a
gain of 100. The typical output slew rate is 1.8 V/
s.
Figure 29. Low Power Instrumentation Amplifier
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相關(guān)代理商/技術(shù)參數(shù) |
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|---|---|
| AD648S | 制造商:AD 制造商全稱:Analog Devices 功能描述:Dual Precision, Low Power BiFET Op Amp |
| AD648SCHIPS | 制造商:AD 制造商全稱:Analog Devices 功能描述:Dual Precision, Low Power BiFET Op Amp |
| AD648SH | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Operational Amplifier |
| AD648SH/883B | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| AD648SQ | 制造商:AD 制造商全稱:Analog Devices 功能描述:Dual Precision, Low Power BiFET Op Amp |
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