- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄2139 > ADA4939-2YCPZ-R7 (Analog Devices Inc)IC AMP DIFF DUAL ULDIST 24LFCSP PDF資料下載
參數(shù)資料
| 型號： | ADA4939-2YCPZ-R7 |
| 廠商： | Analog Devices Inc |
| 文件頁數(shù)： | 14/24頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC AMP DIFF DUAL ULDIST 24LFCSP |
| 標(biāo)準(zhǔn)包裝： | 1 |
| 放大器類型： | 差分 |
| 電路數(shù)： | 2 |
| 輸出類型： | 差分 |
| 轉(zhuǎn)換速率： | 6800 V/µs |
| -3db帶寬： | 1.4GHz |
| 電流 - 輸入偏壓： | 10µA |
| 電壓 - 輸入偏移： | 500µV |
| 電流 - 電源： | 36.5mA |
| 電流 - 輸出 / 通道： | 100mA |
| 電壓 - 電源，單路/雙路(±)： | 3 V ~ 5.25 V，±1.5 V ~ 2.625 V |
| 工作溫度： | -40°C ~ 105°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 24-VFQFN 裸露焊盤，CSP |
| 供應(yīng)商設(shè)備封裝： | 24-LFCSP-VQ（4x4） |
| 包裝： | 標(biāo)準(zhǔn)包裝 |
| 產(chǎn)品目錄頁面： | 781 (CN2011-ZH PDF) |
| 其它名稱： | ADA4939-2YCPZ-R7DKR |
ADA4939-1/ADA4939-2
Rev. 0 | Page 21 of 24
INPUT COMMON-MODE VOLTAGE RANGE
The ADA4939 input common-mode range is centered between the
two supply rails, in contrast to other ADC drivers with level-shifted
input ranges, such as the ADA4937. The centered input common-
mode range is best suited to ac-coupled, differential-to-differential
and dual supply applications.
For 5 V single-supply operation, the input common-mode
range at the summing nodes of the amplifier is specified as
1.1 V to 3.9 V and is specified as 0.9 V to 2.4 V with a 3.3 V
supply. To avoid nonlinearities, the voltage swing at the +IN
and IN terminals must be confined to these ranges.
INPUT AND OUTPUT CAPACITIVE AC COUPLING
Input ac coupling capacitors can be inserted between the source
and RG. This ac coupling blocks the flow of the dc common-
mode feedback current and causes the ADA4939 dc input
common-mode voltage to equal the dc output common-mode
voltage. These ac coupling capacitors must be placed in both
loops to keep the feedback factors matched.
Output ac coupling capacitors can be placed in series between
each output and its respective load. See Figure 54 for an
example that uses input and output capacitive ac coupling.
MINIMUM RG VALUE OF 50 Ω
Due to the wide bandwidth of the ADA4939, the value of RG must
be greater than or equal to 50 Ω to provide sufficient damping in
the amplifier front end. In the terminated case, RG includes the
Thevenin resistance of the source and load terminations.
SETTING THE OUTPUT COMMON-MODE VOLTAGE
The VOCM pin of the ADA4939 is internally biased with a voltage
divider comprising two 20 kΩ resistors at a voltage approximately
equal to the midsupply point, [(+VS) + (VS)]/2. Because of this
internal divider, the VOCM pin sources and sinks current, depending
on the externally applied voltage and its associated source
resistance. Relying on the internal bias results in an output
common-mode voltage that is within about 100 mV of the
expected value.
In cases where more accurate control of the output common-
mode level is required, it is recommended that an external
source or resistor divider be used with source resistance less
than 100 Ω. The output common-mode offset listed in the
by a low impedance voltage source.
It is also possible to connect the VOCM input to a common-mode
level (CML) output of an ADC. However, care must be taken to
ensure that the output has sufficient drive capability. The input
impedance of the VOCM pin is approximately 10 kΩ. If multiple
ADA4939 devices share one reference output, it is recommended
that a buffer be used.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| ADA4940-1ARZ-R7 | IC DIFF ADC DVR 18BIT LN 8SOIC |
| 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 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ADA4939-2YCPZ-RL | 功能描述:IC AMP DIFF DUAL ULDIST 24LFCSP RoHS:是 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) |
| ADA494 | 制造商:AD 制造商全稱:Analog Devices 功能描述:16-Bit, 1 MSPS PulSAR ADC in MSOP QFN |
| ADA4940-1 | 制造商:AD 制造商全稱:Analog Devices 功能描述:Ultralow Power, Low Distortion |
| ADA4940-1ACP-EBZ | 制造商:Analog Devices 功能描述:BARE PCB16LFCSP DIFF AMPADA4940-1 制造商:Analog Devices 功能描述:ADA4940-1, DIFF AMP, EVAL BOARD |
| ADA4940-1ACPZ-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)。