参数资料
型号: LTC1992CMS8#PBF
厂商: Linear Technology
文件页数: 31/42页
文件大小: 0K
描述: IC AMP/DVR I/O FULLY DIFF 8-MSOP
标准包装: 50
放大器类型: 差分
电路数: 1
输出类型: 差分,满摆幅
转换速率: 1.5 V/µs
增益带宽积: 3.2MHz
电流 - 输入偏压: 2pA
电压 - 输入偏移: 250µV
电流 - 电源: 700µA
电流 - 输出 / 通道: 30mA
电压 - 电源,单路/双路(±): 2.7 V ~ 11 V,±1.35 V ~ 5.5 V
工作温度: 0°C ~ 70°C
安装类型: 表面贴装
封装/外壳: 8-TSSOP,8-MSOP(0.118",3.00mm 宽)
供应商设备封装: 8-MSOP
包装: 管件
产品目录页面: 1323 (CN2011-ZH PDF)
LTC1992 Family
37
1992fb
Figure 7. Asymmetrical Feedback Application Circuits (Most Suitable in Applications with Dual,
Split Supplies (e.g., ±5V), Ground Referenced Single-Ended Input Signals and VOCM Connected to Ground)
once the VOCM voltage is set to zero, the gain formula is the
same as a standard noninverting op amp circuit multiplied
by two to account for the complementary output. Taking
RFB to zero (i.e., taking β to one) gives the same formula
as the top circuit. As in the top circuit, this circuit is also
useful as a single-ended output, high input impedance
inverting gain block (this time with gain). The input com-
mon mode considerations are similar to the top circuit’s,
but are not nearly as constrained since there is now gain
in the noninverting amplifier path. This circuit, with VOCM
at ground, also permits a rail-to-rail output swing in most
applications.
The bottom circuit is another circuit that utilizes a standard
op amp configuration with a complementary output. In this
case, the standard op amp circuit has an inverting con-
figuration. With VOCM at zero volts, the gain formula is the
same as a standard inverting op amp circuit multiplied by
two to account for the complementary output. This circuit
does not have any common mode level constraints as the
inverting input voltage sets the input common mode level.
This circuit also delivers rail-to-rail output voltage swing
without any concerns.
APPLICATIONS INFORMATION
+
+VOUT
VOUTDIFF = 2(+VIN – VOCM)
SETTING VOCM = 0V
VOUTDIFF = 2VIN
–VOUT
VIN
VOCM
VOCM LTC1992
+
+VOUT
RFB
RIN
VOUTDIFF = 2
SETTING VOCM = 0V
VOUTDIFF = 2VIN
–VOUT
VIN
VOCM
RIN
RFB
()
+VIN
;
=
= 2VIN 1 +
– VOCM
1
()1 ()
RIN
RIN + RFB
RFB
RIN
+
+VOUT
VOUTDIFF = 2
SETTING VOCM = 0V
VOUTDIFF = 2VIN
–VOUT
1992 F07
VIN
VOCM
()
+VIN
;
=
= 2VIN
+ VOCM
1 –
()
1 –
()
RIN
RIN + RFB
RFB
RIN
VOCM LTC1992
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