参数资料
| 型号： | LT1113CS8#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 4/16页 |
| 文件大小： | 0K |
| 描述： | IC PREC OP-AMP JFET DUAL 8SOIC |
| 标准包装： | 100 |
| 放大器类型： | J-FET |
| 电路数： | 2 |
| 转换速率： | 3.9 V/µs |
| 增益带宽积： | 5.6MHz |
| 电流 - 输入偏压： | 320pA |
| 电压 - 输入偏移： | 500µV |
| 电流 - 电源： | 5.3mA |
| 电压 - 电源，单路/双路(±)： | ±4.5 V ~ 20 V |
| 工作温度： | 0°C ~ 70°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-SO |
| 包装： | 管件 |
| 产品目录页面： | 1317 (CN2011-ZH PDF) |
12
LT1113
1113fb
U
S
A
O
PPLICATI
WU
U
I FOR ATIO
Typical performance of the instrumentation amplifier:
Input offset voltage = 0.8mV
Input bias current = 320pA
Input offset current = 10pA
Input resistance = 1011
Input noise = 3.4
VP-P
High Speed Operation
The low noise performance of the LT1113 was achieved by
making the input JFET differential pair large to maximize
the first stage gain. Increasing the JFET geometry also
increases the parasitic gate capacitance, which if left
unchecked, can result in increased overshoot and ringing.
When the feedback around the op amp is resistive (RF),
a pole will be created with RF, the source resistance and
capacitance (RS,CS), and the amplifier input capacitance
(CIN = 27pF). In closed loop gain configurations and
with RS and RF in the kilohm range (Figure 5), this pole
can create excess phase shift and even oscillation.
A small capacitor (CF) in parallel with RF eliminates this
problem. With RS(CS + CIN) = RFCF, the effect of the
feedback pole is completely removed.
Figure 5.
The concepts of common mode and power supply
rejection ratio match (
CMRR and PSRR) are best
demonstrated with a numerical example:
Assume CMRRA = +50V/V or 86dB,
and CMRRB = + 39V/V or 88dB,
then
CMRR = 11V/V or 99dB;
if CMRRB = -39V/V which is still 88dB,
then
CMRR = 89V/V or 81dB
Clearly the LT1113, by specifying and guaranteeing all of
these matching parameters, can significantly improve the
performance of matching-dependent circuits.
Figure 4. Three Op Amp Instrumentation Amplifier
4
OUTPUT
C1
50pF
R7
10k
R6
10k
1113 F04
GAIN =
BANDWIDTH =
INPUT REFERRED NOISE =
WIDEBAND NOISE DC TO 400kHz =
CL ≤
100
400kHz
6.6nV/
√Hz AT 1kHz
6.6
VRMS
0.01
F
IN–
15V
8
1
–15V
–
+
–
+
1/2
LT1113
IC1
1/2
LT1113
IC1
IN+
R3
1k
R2
200
R1
1k
7
6
5
3
2
R4
1k
1
2
CL
3
–
+
1/2
LT1113
IC2
R5
1k
–
+
1113 F05
OUTPUT
RF
RS
CS
CIN
CF
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LT1113M | 制造商:LINER 制造商全称:Linear Technology 功能描述:Dual Low Noise, Precision, JFET Input Op Amps |
| LT1113MJ8 | 制造商:Linear Technology 功能描述:OP Amp Dual GP 20V 8-Pin CDIP |
| LT1114 | 制造商:LINER 制造商全称:Linear Technology 功能描述:Dual/Quad Low Power Precision, Picoamp Input Op Amps |
| LT1114AC | 制造商:LINER 制造商全称:Linear Technology 功能描述:Dual/Quad Low Power Precision, Picoamp Input Op Amps |
| LT1114ACJ | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Voltage-Feedback Operational Amplifier |
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