The LT1994’s input common mode voltage (VICM
參數(shù)資料
型號(hào)： LT1994CDD#TRPBF
廠商： Linear Technology
文件頁(yè)數(shù)： 5/20頁(yè)
文件大?。?/td> 0K
描述： IC DIFF AMP/DRIVER LN 8-DFN
標(biāo)準(zhǔn)包裝： 2,500
放大器類型： 差分
電路數(shù)： 1
輸出類型： 滿擺幅
轉(zhuǎn)換速率： 65 V/µs
增益帶寬積： 70MHz
電流 - 輸入偏壓： 18µA
電壓 - 輸入偏移： 3000µV
電流 - 電源： 14.8mA
電流 - 輸出 / 通道： 85mA
電壓 - 電源，單路/雙路(±)： 2.375 V ~ 12.6 V，±1.188 V ~ 6.3 V
工作溫度： 0°C ~ 70°C
安裝類型： 表面貼裝
封裝/外殼： 8-WFDFN 裸露焊盤
供應(yīng)商設(shè)備封裝： 8-DFN-EP（3x3）
包裝： 帶卷 (TR)
13
1994fb
LT1994
Input Common Mode Voltage Range
The LT1994’s input common mode voltage (VICM)isdened
as the average of the two input voltages, VIN+, and VIN–.
It extends from V– to approximately 1.25V below V+. The
input common mode range depends on the circuit con-
guration (gain), VOCM and VCM (refer to Figure 4). For
fully differential input applications, where VINP = –VINM,
the common mode input is approximately:
V
VV
V
R
RR
V
R
RR
ICM
IN
OCM
I
IF
CM
F
FI
=
+
≈
+
+
+
–
2
With singled-ended inputs, there is an input signal com-
ponent to the input common mode voltage. Applying only
VINP (setting VINM to zero), the input common voltage is
approximately:
V
VV
V
R
RR
V
R
RR
VR
RR
ICM
IN
OCM
I
IF
CM
F
FI
INP
F
FI
=
+
≈
+
+
+
+
–
2
Output Common Mode Voltage Range
The output common mode voltage is dened as the aver-
age of the two outputs:
VV
OUTCM
OCM
OUT
==
+
–
2
The VOCM sets this average by an internal common mode
feedback loop which internally forces VOUT+ = –VOUT–. The
output common mode range extends from approximately
1.1V above V– to approximately 0.8V below V+. The VOCM
pin sits in the middle of an 80k
Ω to 80kΩ voltage divider
that sets the default mid-supply open-circuit potential.
In single-supply applications, where the LT1994 is used
to interface to an ADC, the optimal common mode input
range to the ADC is often determined by the ADC’s refer-
ence. If the ADC makes a reference available for setting
the input common mode voltage, it can be directly tied
to the VOCM pin, but must be capable of driving a 40k
equivalent resistance that is tied to a mid-supply potential.
If an external reference drives the VOCM pin, it should still
be bypassed with a high quality 0.1μF capacitor to a low
impedance ground plane to lter any thermal noise and
to prevent common mode signals on this pin from being
inadvertently converted to differential signals.
Noise Considerations
The LT1994’s input referred voltage noise is on the order
of 3nV/√Hz. Its input referred current noise is on the
order of 2.5pA/√Hz. In addition to the noise generated
by the amplier, the surrounding feedback resistors also
contribute noise. The output noise generated by both the
amplier and the feedback components is given by the
equation:
e
R
IR
e
R
e
no
ni
F
I
nF
nRI
F
I
nRF
=
+
+
() +
+
12
22
2
Figure 4. Circuit for Common Mode Range
VCM
1994 F04
RI
RF
RL
VS
VSHDNB
VINM
VINP
+
–
+
3
7
6
8
1
2
5
4
LT1994
VOCM
VOUT
+
VIN
–
VOUT
–
VIN
+
0.1μF
RI
RF
RL
SHDN
APPLICATIONS INFORMATION
相關(guān)PDF資料
PDF描述
R11-4-5.00A-R01CV-V CIRCUIT BREAKER ROCKER SP 5A
EL9214IREZ-T7 IC AMP QUAD 100MHZ 100MA14HTSSOP
3404.2419.22 FUSE&HOLDER 2A 125V FAST SMD
T11-311R-1/RS CIRCUIT BRKR THERMAL 1A 1POLE
3404.2418.22 FUSE&HOLDER 1.6A 125V FAST SMD
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LT1994CMS8 制造商:Linear Technology 功能描述:SP Amp DIFF AMP Single R-R O/P ±6.3V/12.6V 8-Pin MSOP
LT1994CMS8#PBF 功能描述:IC DIFF AMP/DRIVER LN 8-MSOP 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
LT1994CMS8#TR 制造商:Linear Technology 功能描述:DIFF-AMPLIFIER, 70MHZ, 65V/US, MSOP-8, No. of Amplifiers:1, Input Offset Voltage 制造商:Linear Technology 功能描述:DIFF-AMPLIFIER, 70MHZ, 65V/US, MSOP-8, No. of Amplifiers:1, Input Offset Voltage:2mV, Bandwidth:70MHz, Amplifier Case Style:MSOP, No. of Pins:8, Supply Voltage Range:2.375V to 12.6V, Slew Rate:65V/s, Supply Current:14.8mA, MSL:- , RoHS Compliant: No
LT1994CMS8#TRPBF 功能描述:IC DIFF AMP/DRIVER LN 8-MSOP 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
LT1994CMS8PBF 制造商:Linear Technology 功能描述:Differential Amp RRO +/-6.3V/12.6V MSOP8
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

*
*
*