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參數(shù)資料
| 型號： | AD8139ACPZ-REEL7 |
| 廠商： | Analog Devices Inc |
| 文件頁數(shù)： | 14/25頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC AMP DIFF R-R LN LDIST 8LFCSP |
| 標(biāo)準(zhǔn)包裝： | 1 |
| 放大器類型： | 差分 |
| 電路數(shù)： | 1 |
| 輸出類型： | 差分，滿擺幅 |
| 轉(zhuǎn)換速率： | 800 V/µs |
| -3db帶寬： | 410MHz |
| 電流 - 輸入偏壓： | 2.25µA |
| 電壓 - 輸入偏移： | 150µV |
| 電流 - 電源： | 24.5mA |
| 電流 - 輸出 / 通道： | 100mA |
| 電壓 - 電源，單路/雙路(±)： | 4.5 V ~ 12 V，±2.25 V ~ 6 V |
| 工作溫度： | -40°C ~ 125°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 8-VFDFN 裸露焊盤，CSP |
| 供應(yīng)商設(shè)備封裝： | 8-LFCSP-VD（3x3） |
| 包裝： | 標(biāo)準(zhǔn)包裝 |
| 產(chǎn)品目錄頁面： | 770 (CN2011-ZH PDF) |
| 其它名稱： | AD8139ACPZ-REEL7DKR |
AD8139
Rev. B | Page 20 of 24
For proper operation, the voltages at VAN and VAP must stay
within their respective linear ranges.
Calculating Input Impedance
The input impedance of the circuit in Figure 59 depends on
whether the amplifier is being driven by a single-ended or a
differential signal source. For balanced differential input
signals, the differential input impedance (RIN, dm) is simply
RIN, dm = 2RG
(18)
For a single-ended signal (for example, when VIN is grounded
and the input signal drives VIP), the input impedance becomes
)
(
2
1
F
G
F
G
IN
R
+
=
(19)
The input impedance of a conventional inverting op amp
configuration is simply RG, but it is higher in Equation 19
because a fraction of the differential output voltage appears at
the summing junctions, VAN and VAP. This voltage partially
bootstraps the voltage across the input resistor RG, leading to
the increased input resistance.
Input Common-Mode Swing Considerations
In some single-ended-to-differential applications, when using a
single-supply voltage, attention must be paid to the swing of the
input common-mode voltage, VACM.
about a baseline at ground, and VREF is connected to ground.
The circuit has a differential gain of 1.6 and β = 0.38. VICM has
an amplitude of 2.5 V p-p and is swinging about ground. Using
the results in Equation 16, the common-mode voltage at the
inputs of the AD8139, VACM, is a 1.5 V p-p signal swinging
about a baseline of 0.95 V. The maximum negative excursion
of VACM in this case is 0.2 V, which exceeds the lower input
common-mode voltage limit.
DGND AGND REFGND REF REFBUFIN PDBUF
ADR431
2.5V
REFERENCE
47F
AD7674
IN+
IN–
AVDD
DVDD
AD8139
+
–
8
VREF
2.5V
2
1
6
3
4
5
VOCM
200
324
5V
20
15
VIN
2.7nF
0.1F
+1.7V
+0.95V
VACM
WITH VREF = 0
+0.2V
+2.5V
GND
–2.5V
046
79
-05
2
Figure 61. AD8139 Driving AD7674, 18-Bit, 800 kSPS ADC
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AD8139AR | 制造商:Analog Devices 功能描述: |
| AD8139ARD | 功能描述:IC AMP DIFF R-R LN LDIST 8SOIC RoHS:否 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 標(biāo)準(zhǔn)包裝:2,500 系列:Excalibur™ 放大器類型:J-FET 電路數(shù):1 輸出類型:- 轉(zhuǎn)換速率:45 V/µs 增益帶寬積:10MHz -3db帶寬:- 電流 - 輸入偏壓:20pA 電壓 - 輸入偏移:490µV 電流 - 電源:1.7mA 電流 - 輸出 / 通道:48mA 電壓 - 電源，單路/雙路(±):4.5 V ~ 38 V，±2.25 V ~ 19 V 工作溫度:-40°C ~ 85°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-SOIC 包裝:帶卷 (TR) |
| AD8139ARD-EBZ | 功能描述:BOARD EVAL FOR AD8139ARD RoHS:是 類別:編程器，開發(fā)系統(tǒng) >> 評估板 - 運算放大器 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:1 系列:- |
| AD8139ARD-REEL | 功能描述:IC AMP DIFF R-R LN LDIST 8SOIC RoHS:否 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 標(biāo)準(zhǔn)包裝:50 系列:- 放大器類型:J-FET 電路數(shù):2 輸出類型:- 轉(zhuǎn)換速率:3.5 V/µs 增益帶寬積:1MHz -3db帶寬:- 電流 - 輸入偏壓:30pA 電壓 - 輸入偏移:2000µV 電流 - 電源:200µA 電流 - 輸出 / 通道:- 電壓 - 電源，單路/雙路(±):7 V ~ 36 V，±3.5 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(yīng)商設(shè)備封裝:8-PDIP 包裝:管件 |
| AD8139ARD-REEL7 | 制造商:Analog Devices 功能描述:SP Amp DIFF AMP Single R-R O/P 制造商:Analog Devices 功能描述:SP Amp DIFF AMP Single R-R O/P ±6V/12V 8-Pin SOIC N EP T/R |
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