参数资料
型号: LMH6619MAE/NOPB
厂商: National Semiconductor
文件页数: 18/38页
文件大小: 0K
描述: IC AMP DUAL RRIO 130MHZ 8-SOIC
标准包装: 250
系列: PowerWise®
放大器类型: 电压反馈
电路数: 2
输出类型: 满摆幅
转换速率: 57 V/µs
增益带宽积: 58MHz
-3db带宽: 140MHz
电流 - 输入偏压: 1.5µA
电压 - 输入偏移: 100µV
电流 - 电源: 1.45mA
电流 - 输出 / 通道: 35mA
电压 - 电源,单路/双路(±): 2.7 V ~ 11 V,±1.35 V ~ 5.5 V
工作温度: -40°C ~ 125°C
安装类型: 表面贴装
封装/外壳: 8-SOIC(0.154",3.90mm 宽)
供应商设备封装: 8-SOIC
包装: 带卷 (TR)
配用: 551600075-001-ND - BOARD FOR SOIC LMH6612/19
551600074-001-ND - BOARD FOR SOIC LMH6612/19
其它名称: LMH6619MAE
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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