参数资料
型号: LTC6910-2HTS8#TRPBF
厂商: Linear Technology
文件页数: 14/24页
文件大小: 0K
描述: IC PGA DIGITAL R-R I/O TSOT23-8
标准包装: 2,500
放大器类型: 可编程增益
电路数: 1
输出类型: 满摆幅
转换速率: 16 V/µs
增益带宽积: 13MHz
电压 - 输入偏移: 1500µV
电流 - 电源: 3.5mA
电流 - 输出 / 通道: 35mA
电压 - 电源,单路/双路(±): 2.7 V ~ 10.5 V,±2.7 V ~ 5.25 V
工作温度: -40°C ~ 125°C
安装类型: 表面贴装
封装/外壳: SOT-23-8 薄型,TSOT-23-8
供应商设备封装: TSOT-23-8
包装: 带卷 (TR)
LTC6910-1
LTC6910-2/LTC6910-3
21
6910123fa
TYPICAL APPLICATIO
U
Figure 7 shows a block diagram and Figure 8 the practical
circuit for a low noise amplifier with gain and bandwidth
independently programmable over 100:1 ranges. One
LTC6910-X controls the gain and another controls the
bandwidth. An LT1884 dual op amp forms an integrating
lowpass loop with capacitor C2 to set the programmable
upper corner frequency. The LT1884 also supports rail-to-
rail output swings over the total supply voltage range of
2.7V to 10.5V. AC coupling through capacitor C1 estab-
+
+
+
+
VIN
C1
GAIN CONTROL PGA
(GAIN A)
VOUT = (GAIN A)VIN
BANDWIDTH CONTROL PGA
(GAIN B)
GAIN = –1
C2
R1
R2
VOUT
6910 F05
1
2
πR1C1 ≤
BANDWIDTH
1
R2
(GAIN B)
2
π
C2
Figure 7. Block Diagram of an AC Amplifier with Programmable Gain and Bandwidth
lishes a fixed low frequency corner of 1Hz, which can be
adjusted by changing C1. Alternatively, shorting C1 makes
the amplifier DC coupled. (If DC gain is not needed,
however, the AC coupling suppresses several error sources:
any shifts in DC levels, low frequency noise and all
amplifier DC offset voltages other than the low internally
trimmed LT1884 offset in the integrating amplifier. If
desired, another coupling capacitor in series with the input
can relax the requirements on DC input level as well.)
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