For proper operation, the voltages at VAN and V
參數(shù)資料
型號(hào): AD8139ARD-REEL
廠(chǎng)商: Analog Devices Inc
文件頁(yè)數(shù): 14/25頁(yè)
文件大小: 0K
描述: IC AMP DIFF R-R LN LDIST 8SOIC
標(biāo)準(zhǔn)包裝: 2,500
放大器類(lèi)型: 差分
電路數(shù): 1
輸出類(lèi)型: 差分,滿(mǎn)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(lèi)型: 表面貼裝
封裝/外殼: 8-SOIC(0.154",3.90mm Width)裸露焊盤(pán)
供應(yīng)商設(shè)備封裝: 8-SOIC-EP
包裝: 帶卷 (TR)
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.
Consider the case in Figure 61, where VIN is 5 V p-p swinging
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
相關(guān)PDF資料
PDF描述
AD8202WYRMZ IC AMP DIFF 50KHZ 8MSOP
AD8203YRZ-R7 IC AMP DIFF 60KHZ 8SOIC
AD8205WYRZ IC AMP DIFF 42V SGL 8SOIC
AD8206WYRZ IC AMP DIFF 8SOIC
AD8207WBRZ-RL IC AMP 65V DIFF BIDIRECT 8SOIC
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
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
AD8139ARDZ 功能描述:IC AMP DIFF R-R LN LDIST 8SOIC RoHS:是 類(lèi)別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 標(biāo)準(zhǔn)包裝:2,500 系列:- 放大器類(lèi)型:通用 電路數(shù):4 輸出類(lèi)型:- 轉(zhuǎn)換速率:0.6 V/µs 增益帶寬積:1MHz -3db帶寬:- 電流 - 輸入偏壓:45nA 電壓 - 輸入偏移:2000µV 電流 - 電源:1.4mA 電流 - 輸出 / 通道:40mA 電壓 - 電源,單路/雙路(±):3 V ~ 32 V,±1.5 V ~ 16 V 工作溫度:0°C ~ 70°C 安裝類(lèi)型:表面貼裝 封裝/外殼:14-TSSOP(0.173",4.40mm 寬) 供應(yīng)商設(shè)備封裝:14-TSSOP 包裝:帶卷 (TR) 其它名稱(chēng):LM324ADTBR2G-NDLM324ADTBR2GOSTR
AD8139ARDZ1 制造商:AD 制造商全稱(chēng):Analog Devices 功能描述:Low Noise Rail-to-Rail Differential ADC Driver
AD8139ARDZ-REEL 功能描述:IC AMP DIFF R-R LN LDIST 8SOIC RoHS:是 類(lèi)別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 標(biāo)準(zhǔn)包裝:50 系列:- 放大器類(lèi)型:J-FET 電路數(shù):2 輸出類(lèi)型:- 轉(zhuǎn)換速率:13 V/µs 增益帶寬積:3MHz -3db帶寬:- 電流 - 輸入偏壓:65pA 電壓 - 輸入偏移:3000µV 電流 - 電源:1.4mA 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:-40°C ~ 85°C 安裝類(lèi)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
AD8139ARDZ-REEL7 功能描述:IC AMP DIFF R-R LN LDIST 8SOIC RoHS:是 類(lèi)別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 標(biāo)準(zhǔn)包裝:50 系列:- 放大器類(lèi)型:J-FET 電路數(shù):2 輸出類(lèi)型:- 轉(zhuǎn)換速率:13 V/µs 增益帶寬積:3MHz -3db帶寬:- 電流 - 輸入偏壓:65pA 電壓 - 輸入偏移:3000µV 電流 - 電源:1.4mA 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:-40°C ~ 85°C 安裝類(lèi)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