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参数资料
| 型号： | LT1793CN8 |
| 厂商： | LINEAR TECHNOLOGY CORP |
| 元件分类： | 运动控制电子 |
| 英文描述： | Low Noise, Picoampere Bias Current, JFET Input Op Amp |
| 中文描述： | OP-AMP, 3500 uV OFFSET-MAX, 3.3 MHz BAND WIDTH, PDIP8 |
| 封装： | 0.300 INCH, PLASTIC, DIP-8 |
| 文件页数： | 9/12页 |
| 文件大小： | 162K |
| 代理商： | LT1793CN8 |
9
LT1793
U
S
A
O
PPLICATI
U
U
Input:
±
5.2V Sine Wave
LT1793 Output
LT1793 F05a
LT1793 F05b
Figure 5. Voltage Follower with Input Exceeding the Common Mode Range (V
S
=
±
5V)
resulting in a change in voltage dV, which is equal to dQ/C
F
.
The gain therefore is C
F
/C
S
. For unity-gain, the C
F
should
equal the transducer capacitance plus the input capaci-
tance of the LT1793 and R
F
should equal R
S
.
In the noninverting mode example, the transducer current
is converted to a change in voltage by the transducer
capacitance, C
S
. This voltage is then buffered by the
LT1793 with a gain of 1 + R1/R2. A DC path is provided by
R
S
, which is either the transducer impedance or an exter-
nal resistor. Since R
S
is usually several orders of magni-
tude greater than the parallel combination of R1 and R2, R
B
is added to balance the DC offset caused by the noninvert-
ing input bias current and R
S
. The input bias currents,
although small at room temperature, can create significant
errors at higher temperature, especially with transducer
resistances of up to 1000M or more. The optimum value
for R
B
is determined by equating the thermal noise (4kTR
S
)
to the current noise (2qI
B
) times R
S2
. Solving for R
S
results in R
B
= R
S
= 2V
T
/I
B
(V
T
= 26mV at 25
°
C). A parallel
capacitor C
B
, is used to cancel the phase shift caused by
the op amp input capacitance and R
B
.
Reduced Power Supply Operation
To take full advantage of a wide input common mode range,
the LT1793 was designed to eliminate phase reversal.
Referring to the photographs in Figure 5, the LT1793 is
shown operating in the follower mode (A
V
= 1) at
±
5V
supplies with the input swinging
±
5.2V. The output of the
LT1793 clips cleanly and recovers with no phase reversal.
This has the benefit of preventing lockup in servo systems
and minimizing distortion components.
相关PDF资料 |
PDF描述 |
|---|---|
| LT1793AIN8 | Circular Connector; No. of Contacts:85; Series:MS27473; Body Material:Aluminum; Connecting Termination:Crimp; Connector Shell Size:22; Circular Contact Gender:Pin; Circular Shell Style:Straight Plug; Insert Arrangement:22-2 RoHS Compliant: No |
| LT1793AIS8 | Circular Connector; No. of Contacts:26; Series:MS27473; Body Material:Aluminum; Connecting Termination:Crimp; Connector Shell Size:16; Circular Contact Gender:Socket; Circular Shell Style:Straight Plug; Insert Arrangement:16-26 RoHS Compliant: No |
| LT1793IS8 | Low Noise, Picoampere Bias Current, JFET Input Op Amp |
| LT1794ISW | Dual 500mA, 200MHz xDSL Line Driver Amplifier |
| LT1794 | Dual 500mA, 200MHz xDSL Line Driver Amplifier |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LT1793CN8#PBF | 功能描述:IC PREC OPAMP JFET LOWNOIS 8DIP RoHS:是 类别:集成电路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 标准包装:1 系列:MicroAmplifier™ 放大器类型:通用 电路数:4 输出类型:- 转换速率:3.5 V/µs 增益带宽积:1MHz -3db带宽:- 电流 - 输入偏压:5pA 电压 - 输入偏移:1500µV 电流 - 电源:220µA 电流 - 输出 / 通道:60mA 电压 - 电源，单路/双路(±):4.5 V ~ 36 V，±2.25 V ~ 18 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:14-SOIC（0.154"，3.90mm 宽） 供应商设备封装:14-SOIC 包装:剪切带 (CT) 其它名称:296-29363-1 |
| LT1793CS8 | 功能描述:IC PREC OPAMP JFET LOWNOIS 8SOIC RoHS:否 类别:集成电路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 标准包装:50 系列:LinCMOS™ 放大器类型:通用 电路数:4 输出类型:- 转换速率:0.05 V/µs 增益带宽积:110kHz -3db带宽:- 电流 - 输入偏压:0.7pA 电压 - 输入偏移:210µV 电流 - 电源:57µA 电流 - 输出 / 通道:30mA 电压 - 电源，单路/双路(±):3 V ~ 16 V，±1.5 V ~ 8 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:14-SOIC（0.154"，3.90mm 宽） 供应商设备封装:14-SOIC 包装:管件 产品目录页面:865 (CN2011-ZH PDF) 其它名称:296-1834296-1834-5 |
| LT1793CS8#PBF | 功能描述:IC PREC OPAMP JFET LOWNOIS 8SOIC RoHS:是 类别:集成电路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 标准包装:1 系列:MicroAmplifier™ 放大器类型:通用 电路数:4 输出类型:- 转换速率:3.5 V/µs 增益带宽积:1MHz -3db带宽:- 电流 - 输入偏压:5pA 电压 - 输入偏移:1500µV 电流 - 电源:220µA 电流 - 输出 / 通道:60mA 电压 - 电源，单路/双路(±):4.5 V ~ 36 V，±2.25 V ~ 18 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:14-SOIC（0.154"，3.90mm 宽） 供应商设备封装:14-SOIC 包装:剪切带 (CT) 其它名称:296-29363-1 |
| LT1793CS8#TR | 功能描述:IC OPAMP PREC JFET LOWNOIS 8SOIC RoHS:否 类别:集成电路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 标准包装:50 系列:LinCMOS™ 放大器类型:通用 电路数:4 输出类型:- 转换速率:0.05 V/µs 增益带宽积:110kHz -3db带宽:- 电流 - 输入偏压:0.7pA 电压 - 输入偏移:210µV 电流 - 电源:57µA 电流 - 输出 / 通道:30mA 电压 - 电源，单路/双路(±):3 V ~ 16 V，±1.5 V ~ 8 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:14-SOIC（0.154"，3.90mm 宽） 供应商设备封装:14-SOIC 包装:管件 产品目录页面:865 (CN2011-ZH PDF) 其它名称:296-1834296-1834-5 |
| LT1793CS8#TRPBF | 功能描述:IC PREC OPAMP JFET LOWNOIS 8SOIC RoHS:是 类别:集成电路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 标准包装:50 系列:LinCMOS™ 放大器类型:通用 电路数:4 输出类型:- 转换速率:0.05 V/µs 增益带宽积:110kHz -3db带宽:- 电流 - 输入偏压:0.7pA 电压 - 输入偏移:210µV 电流 - 电源:57µA 电流 - 输出 / 通道:30mA 电压 - 电源，单路/双路(±):3 V ~ 16 V，±1.5 V ~ 8 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:14-SOIC（0.154"，3.90mm 宽） 供应商设备封装:14-SOIC 包装:管件 产品目录页面:865 (CN2011-ZH PDF) 其它名称:296-1834296-1834-5 |
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