參數(shù)資料
型號: LMH6618MKE/NOPB
廠商: National Semiconductor
文件頁數(shù): 18/38頁
文件大小: 0K
描述: IC OP AMP SGL VF RRIO TSOT23-6
標準包裝: 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
LMH6619
0.1 PF
10 PF
0.1 PF
V
+
1.24 k:
1 nF
150 pF
549:
V
+
-
+
22:
390 pF
14.3 k:
5.6 PF
14.3 k:
1 PF
549:
ADC121S705
0.1 PF
10 PF
V
+
LMH6619
0.1 PF
10 PF
0.1 PF
V
+
1.24 k:
1 nF
150 pF
549:
V
+
-
+
14.3 k:
5.6 PF
14.3 k:
1 PF
549:
22:
390 pF
+IN
-IN
SNOSAV7E – AUGUST 2007 – REVISED OCTOBER 2012
Figure 67. LMH6619 Driving an ADC121S705
DC LEVEL SHIFTING
Often a signal must be both amplified and level shifted while using a single supply for the op amp. The circuit in
Figure 68 can do both of these tasks. The procedure for specifying the resistor values is as follows.
1. Determine the input voltage.
2. Calculate the input voltage midpoint, VINMID = VINMIN + (VINMAX – VINMIN)/2.
3. Determine the output voltage needed.
4. Calculate the output voltage midpoint, VOUTMID = VOUTMIN + (VOUTMAX – VOUTMIN)/2.
5. Calculate the gain needed, gain = (VOUTMAX – VOUTMIN)/(VINMAX – VINMIN)
6. Calculate the amount the voltage needs to be shifted from input to output,
ΔVOUT = VOUTMID – gain x VINMID.
7. Set the supply voltage to be used.
8. Calculate the noise gain, noise gain = gain +
ΔVOUT/VS.
9. Set RF.
10. Calculate R1, R1 = RF/gain.
11. Calculate R2, R2 = RF/(noise gain-gain).
12. Calculate RG, RG= RF/(noise gain – 1).
Check that both the VIN and VOUT are within the voltage ranges of the LMH6618.
The following example is for a VIN of 0V to 1V with a VOUT of 2V to 4V.
1. VIN = 0V to 1V
2. VINMID = 0V + (1V – 0V)/2 = 0.5V
3. VOUT = 2V to 4V
Copyright 2007–2012, Texas Instruments Incorporated
25
Product Folder Links: LMH6618 LMH6619
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