參數資料
| 型號： | AD548KNZ |
| 廠商： | Analog Devices Inc |
| 文件頁數： | 2/12頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC OPAMP GP 1MHZ LP PREC 8DIP |
| 標準包裝： | 50 |
| 放大器類型： | 通用 |
| 電路數： | 1 |
| 轉換速率： | 1.8 V/µs |
| 增益帶寬積： | 1MHz |
| 電流 - 輸入偏壓： | 30pA |
| 電壓 - 輸入偏移： | 300µV |
| 電流 - 電源： | 170µA |
| 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： | 通孔 |
| 封裝/外殼： | 8-DIP（0.300"，7.62mm） |
| 供應商設備封裝： | 8-PDIP |
| 包裝： | 管件 |
| 產品目錄頁面： | 773 (CN2011-ZH PDF) |
AD548
–10–
REV. D
Figure 10. Log Ratio Amplifier
compensation is provided by resistors R8 and R15 that have a
positive 3500 ppm/
°C temperature coefficient. The transfer
function for the output voltage is:
V
OUT
= 1V log
10 ( I2 / I1 )
Frequency compensation is provided by R11, R12, C1, and C2.
Small signal bandwidth is approximately 300 kHz at input cur-
rents above 100
A and will proportionally decrease with lower
signal levels. D1, D2, R13, and R14 compensate for the effects
of the two logging transistors’ ohmic emitter resistance.
To trim this circuit, set the two input currents to 10
A and adjust
VOUT to zero by adjusting the potentiometer on A3. Then set I2
to 1
A and adjust the scale factor such that the output voltage is
1 V by trimming potentiometer R10. Offset adjustment for A1 and
A2 is provided to increase the accuracy of the voltage inputs.
This circuit ensures a 1% log conformance error over an input
current range of 300 pA to 1 mA, with low level accuracy
limited by the AD548’s input current. The low level input voltage
accuracy of this circuit is limited by the input offset voltage and
drift of the AD548.
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相關代理商/技術參數 |
參數描述 |
|---|---|
| AD548KNZ | 制造商:Analog Devices 功能描述:Operational Amplifier (Op-Amp) IC 制造商:Analog Devices 功能描述:IC, OP-AMP, 1MHZ, 1.8V/ us, DIP-8 |
| AD548KR | 制造商:Rochester Electronics LLC 功能描述:LOW POWER BIFET OP AMP IC - Bulk |
| AD548KR-REEL | 制造商:AD 制造商全稱:Analog Devices 功能描述:Precision, Low Power BiFET Op Amp |
| AD548S | 制造商:AD 制造商全稱:Analog Devices 功能描述:Precision, Low Power BiFET Op Amp |
| AD548SH | 制造商:AD 制造商全稱:Analog Devices 功能描述:Precision, Low Power BiFET Op Amp |
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