参数资料
| 型号： | LTC6409CUDB#TRMPBF |
| 厂商： | Linear Technology |
| 文件页数： | 2/24页 |
| 文件大小： | 0K |
| 描述： | IC AMP/DRIVER DIFF 10-QFN |
| 标准包装： | 1 |
| 类型： | ADC 驱动器 |
| 应用： | 数据采集 |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 10-WQFN |
| 供应商设备封装： | 10-TQFN（3x2） |
| 包装： | 标准包装 |
| 其它名称： | LTC6409CUDB#TRMPBFDKR |
LTC6409
10
6409fa
applicaTions inForMaTion
that can be processed is even wider. The input common
mode range at the op amp inputs depends on the circuit
configuration (gain), VOCM and VCM (refer to Figure 1). For
fully differential input applications, where VINP = –VINM,
the common mode input is approximately:
VICM =
V+IN + V–IN
2
≈ VOCM
RI
RI +RF
+ VCM
RF
RI +RF
With single-ended inputs, there is an input signal com-
ponent to the input common mode voltage. Applying
only VINP (setting VINM to zero), the input common mode
voltage is approximately:
VICM =
V+IN + V–IN
2
≈ VOCM
RI
RI +RF
+
VCM
RF
RI +RF
+
VINP
2
RF
RI +RF
(2)
This means that if, for example, the input signal (VINP)
is a sine, an attenuated version of that sine signal also
appears at the op amp inputs.
Input Impedance and Loading Effects
The low frequency input impedance looking into the VINP
or VINM input of Figure 1 depends on how the inputs are
driven. For fully differential input sources (VINP = –VINM),
the input impedance seen at either input is simply:
RINP = RINM = RI
For single-ended inputs, because of the signal imbalance
at the input, the input impedance actually increases over
thebalanceddifferentialcase.Theinputimpedancelooking
into either input is:
RINP =RINM =
RI
1–
1
2
RF
RI +RF
Inputsignalsourceswithnon-zerooutputimpedancescan
alsocausefeedbackimbalancebetweenthepairoffeedback
networks. For the best performance, it is recommended
that the input source output impedance be compensated.
If input impedance matching is required by the source,
Figure 1. Circuit for Common Mode Range
–
+
RF
V–OUT
V+OUT
VVOCM
VOCM
6409 F01
RF
RI
+
–
VINP
+
–
VCM
–
+
VINM
V–IN
V+IN
suited for pre-amplification, level shifting and conversion
of single-ended signals to differential output signals for
driving differential input ADCs.
Output Common Mode and VOCM Pin
The output common mode voltage is defined as the aver-
age of the two outputs:
VOUTCM = VOCM =
V+OUT + V–OUT
2
As the equation shows, the output common mode voltage
is independent of the input common mode voltage, and
is instead determined by the voltage on the VOCM pin, by
means of an internal common mode feedback loop.
If the VOCM pin is left open, an internal resistor divider
develops a default voltage of 1.25V with a 5V supply. The
VOCM pin can be overdriven to another voltage if desired.
For example, when driving an ADC, if the ADC makes a
referenceavailableforsettingthecommonmodevoltage,it
can be directly tied to the VOCM pin, as long as the ADC is
capableofdrivingthe40kinputresistancepresentedbythe
VOCM pin. The Electrical Characteristics table specifies the
valid range that can be applied to the VOCM pin (VOUTCMR).
Input Common Mode Voltage Range
The LTC6409’s input common mode voltage (VICM) is
defined as the average of the two input pins, V+IN and
V–IN. The valid range that can be used for VICM has been
specified in the Electrical Characteristics table (VICMR).
However, due to external resistive divider action of the
gain and feedback resistors, the effective range of signals
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC6409HUDB#PBF | 制造商:Linear Technology 功能描述:DIFF-AMPLIFIER, 10GHZ, 3300V/US, QFN-10, No. of Amplifiers:1, Input Offset Voltage:300V, Bandwidth:10GHz, Amplifier Case Style:QFN, No. of Pins:10, Supply Voltage Range:2.7V to 5.25V, Slew Rate:3300V/s, Supply Current:52mA, MSL:- , RoHS Compliant: Yes |
| LTC6409HUDB#TRMPBF | 功能描述:IC AMP/DRIVER DIFF GBW 10-QFN RoHS:是 类别:集成电路 (IC) >> 线性 - 放大器 - 专用 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:60 系列:- 类型:可变增益放大器 应用:CATV 安装类型:表面贴装 封装/外壳:20-WQFN 裸露焊盘 供应商设备封装:20-TQFN-EP（5x5） 包装:托盘 |
| LTC6409HUDB#TRPBF | 功能描述:IC AMP/DRIVER DIFF GBW 10-QFN RoHS:是 类别:集成电路 (IC) >> 线性 - 放大器 - 专用 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:60 系列:- 类型:可变增益放大器 应用:CATV 安装类型:表面贴装 封装/外壳:20-WQFN 裸露焊盘 供应商设备封装:20-TQFN-EP（5x5） 包装:托盘 |
| LTC6409HUDBTRMPBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:10GHz GBW, 1.1nV/Hz Differential Amplifier/ADC Driver |
| LTC6409IUDB#PBF | 制造商:Linear Technology 功能描述:SP Amp DIFF AMP Single 5.25V 10-Pin QFN EP 制造商:Linear Technology 功能描述:Bulk |
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