參數(shù)資料
型號(hào)： ADA4940-1ARZ-RL
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： 2,500
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)
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
150244-5222-RB CONN 44POS 2MM SOCKET R/A PC MT
ADA4940-1ACPZ-RL IC DIFF ADC DVR 18BIT LN 16LFCSP
P0641UATP SIDACTOR UNI 4CHP 58V 150A MS013
ICL7650SCPD IC OP AMP CHOP STAB 2MHZ 14-PDIP
RNCF0402DTE102K RES 102K OHM 1/16W 0.5% 0402
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
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
ADA4940-2ACPZ-R7 功能描述:IC DIFF ADC DVR 18BIT LN 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:- 放大器類型:通用 電路數(shù):4 輸出類型:- 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:LM324ADTBR2G-NDLM324ADTBR2GOSTR
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*