2SRFCT Where, fZ<" />
參數(shù)資料
型號(hào): LMH6618MKE/NOPB
廠商: National Semiconductor
文件頁(yè)數(shù): 20/38頁(yè)
文件大小: 0K
描述: IC OP AMP SGL VF RRIO TSOT23-6
標(biāo)準(zhǔn)包裝: 250
系列: PowerWise®
放大器類型: 電壓反饋
電路數(shù): 1
輸出類型: 滿擺幅
轉(zhuǎn)換速率: 57 V/µs
增益帶寬積: 65MHz
-3db帶寬: 140MHz
電流 - 輸入偏壓: 1.5µA
電壓 - 輸入偏移: 100µV
電流 - 電源: 1.35mA
電流 - 輸出 / 通道: 35mA
電壓 - 電源,單路/雙路(±): 2.7 V ~ 11 V,±1.35 V ~ 5.5 V
工作溫度: -40°C ~ 125°C
安裝類型: 表面貼裝
封裝/外殼: SOT-23-6 細(xì)型,TSOT-23-6
供應(yīng)商設(shè)備封裝: TSOT-23-6
包裝: 帶卷 (TR)
配用: 551600083-001-ND - BOARD FOR SOT23 LMH6611/18
其它名稱: LMH6618MKE
LMH6618MKE-ND
LMH6618MKE/NOPBTR
2SRFCT
Where, fZ
1
#
and fP =
2SRFCF
1
NG =
1 + sRF (CT + CF)
1 + sCFRF
+
-
CPD
CIN
LMH6618
RF
CF
VS
+
-
LMH6618
1 k:
51:
0.1:
0A to 1A
1 k:
+5V
SNOSAV7E – AUGUST 2007 – REVISED OCTOBER 2012
Figure 70. Current Sense Amplifier
TRANSIMPEDANCE AMPLIFIER
By definition, a photodiode produces either a current or voltage output from exposure to a light source. A
Transimpedance Amplifier (TIA) is utilized to convert this low-level current to a usable voltage signal. The TIA
often will need to be compensated to insure proper operation.
Figure 71. Photodiode Modeled with Capacitance Elements
Figure 71 shows the LMH6618 modeled with photodiode and the internal op amp capacitances. The LMH6618
allows circuit operation of a low intensity light due to its low input bias current by using larger values of gain (RF).
The total capacitance (CT) on the inverting terminal of the op amp includes the photodiode capacitance (CPD) and
the input capacitance of the op amp (CIN). This total capacitance (CT) plays an important role in the stability of
the circuit. The noise gain of this circuit determines the stability and is defined by:
(1)
(2)
Copyright 2007–2012, Texas Instruments Incorporated
27
Product Folder Links: LMH6618 LMH6619
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