- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄2139 > ADA4940-1ARZ-R7 (Analog Devices Inc)IC DIFF ADC DVR 18BIT LN 8SOIC PDF資料下載
參數(shù)資料
| 型號： | ADA4940-1ARZ-R7 |
| 廠商： | Analog Devices Inc |
| 文件頁數(shù)： | 16/33頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC DIFF ADC DVR 18BIT LN 8SOIC |
| 標(biāo)準(zhǔn)包裝： | 1,000 |
| 放大器類型： | 差分 |
| 電路數(shù)： | 1 |
| 輸出類型： | 差分 |
| 轉(zhuǎn)換速率： | 95 V/µs |
| -3db帶寬： | 260MHz |
| 電流 - 輸入偏壓： | 1.1µA |
| 電壓 - 輸入偏移： | 60µV |
| 電流 - 電源： | 1.25mA |
| 電流 - 輸出 / 通道： | 46mA |
| 電壓 - 電源，單路/雙路(±)： | 3 V ~ 6 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(yīng)商設(shè)備封裝： | 8-SO |
| 包裝： | 帶卷 (TR) |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁當(dāng)前第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁
ADA4940-1/ADA4940-2
Data Sheet
Rev. C | Page 22 of 32
THEORY OF OPERATION
The ADA4940-1/ADA4940-2 are high speed, low power
differential amplifiers fabricated on Analog Devices advanced
dielectrically isolated SiGe bipolar process. They provide two
closely balanced differential outputs in response to either
differential or single-ended input signals. An external feedback
network that is similar to a voltage feedback operational
amplifier sets the differential gain. The output common-mode
voltage is independent of the input common-mode voltage and
is set by an external voltage at the VOCM terminal. The PNP
input stage allows input common-mode voltages between the
negative supply and 1.2 V below the positive supply. A rail-to-
rail output stage supplies a wide output voltage range.
The DISABLE pin can be used to reduce the supply current of
the amplifier to 13.5 A.
The differential feedback loop consists of the differential trans-
conductance GDIFF working through the GO output buffers and
the RF/RG feedback networks. The common-mode feedback
loop is set up with a voltage divider across the two differential
outputs to create an output voltage midpoint and a common-
mode transconductance, GCM.
08452-
058
GO
CC
RF
RG
GCM
GDIFF
GO
RG
VREF
–OUT
+OUT
RF
+DIN
–DIN
+IN
–IN
VOCM
Figure 62. ADA4940-1/ADA4940-2 Architectural Block
The differential feedback loop forces the voltages at +IN and IN
to equal each other. This fact sets the following relationships:
F
OUT
G
IN
R
V
R
D
=
+
F
OUT
G
IN
R
V
R
D
+
=
Subtracting the previous equations gives the relationship that
shows RF and RG setting the differential gain.
(V+OUT VOUT) = (+DIN – (DIN)) ×
G
F
R
The common-mode feedback loop drives the output common-
mode voltage that is sampled at the midpoint of the output
voltage divider to equal the voltage at VOCM. This results in the
following relationships:
V+OUT = VOCM +
2
dm
OUT,
V
VOUT = VOCM
2
dm
OUT,
V
Note that the differential amplifier’s summing junction input
voltages, +IN and IN, are set by both the output voltages and
the input voltages.
+
+
=
+
G
F
G
OUT
G
F
IN
R
V
R
D
V
+
+
=
+
G
F
G
OUT
G
F
IN
R
V
R
D
V
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| ADA4950-1YCPZ-RL | IC AMP DIFF LP 114MA 16LFCSP |
| ADEL2020ARZ-20-RL | IC OPAMP CF LN LP 60MA 20SOIC |
| ADL5561ACPZ-R7 | IC AMP DIFF RF/IF 2.9GHZ 16LFCSP |
| ADL5562ACPZ-R7 | IC AMP DIFF RF/IF 3.3GHZ 16LFCSP |
| ADL5565ACPZ-R7 | IC AMP DIFF 6GHZ 16LFCSP |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ADA4940-1ARZ-RL | 功能描述:IC DIFF ADC DVR 18BIT LN 8SOIC RoHS:是 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:通用 電路數(shù):2 輸出類型:滿擺幅 轉(zhuǎn)換速率:1.8 V/µs 增益帶寬積:6.5MHz -3db帶寬:4.5MHz 電流 - 輸入偏壓:5nA 電壓 - 輸入偏移:100µV 電流 - 電源:65µA 電流 - 輸出 / 通道:35mA 電壓 - 電源，單路/雙路(±):1.8 V ~ 5.25 V，±0.9 V ~ 2.625 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:10-TFSOP，10-MSOP（0.118"，3.00mm 寬） 供應(yīng)商設(shè)備封裝:10-MSOP 包裝:管件 |
| ADA4940-1XCPZ-R7 | 制造商:Analog Devices 功能描述: |
| ADA4940-2 | 制造商:AD 制造商全稱:Analog Devices 功能描述:Ultralow Power, Low Distortion |
| ADA4940-2ACP-EBZ | 制造商:Analog Devices 功能描述:EVAL BOARD DUAL DIFFERENTIAL 制造商:Analog Devices 功能描述:ADA4940-2, DIFF AMP, EVAL BOARD |
| ADA4940-2ACPZ-R2 | 制造商:Analog Devices 功能描述:SUB 10M W ADC DRIVER FOR PULSAR FAMILY - Tape and Reel |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。