参数资料
| 型号： | LTC6244HVIMS8#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 8/26页 |
| 文件大小： | 0K |
| 描述： | IC OP AMP DUAL R-R 8-MSOP |
| 标准包装： | 2,500 |
| 放大器类型： | 通用 |
| 电路数： | 2 |
| 输出类型： | 满摆幅 |
| 转换速率： | 40 V/µs |
| 增益带宽积： | 50MHz |
| 电流 - 输入偏压： | 1pA |
| 电压 - 输入偏移： | 50µV |
| 电流 - 电源： | 7mA |
| 电流 - 输出 / 通道： | 55mA |
| 电压 - 电源，单路/双路(±)： | 2.8 V ~ 11 V，±1.4 V ~ 5.5 V |
| 工作温度： | -40°C ~ 85°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： | 带卷 (TR) |
LTC6244
16
6244fb
resistance of the particular application. Specically, these
ampliers exhibit the noise of a 4k resistor, meaning it is
desirable to keep the source and feedback resistance at or
below this value, i.e., RS + RG||RFB ≤ 4k. Above this total
source impedance, the noise voltage is not dominated by
the amplier.
Noise current can be estimated from the expression in =
√2qIB, where q = 1.6 10–19 coulombs. Equating √4kTRΔf
and RS√2qIBΔf shows that for source resistors below
50GΩ the amplier noise is dominated by the source
resistance. See the Typical Characteristics curve Noise
Current vs Frequency.
Proprietary design techniques are used to obtain simulta-
neous low 1/f noise and low input capacitance. Low input
capacitance is important when the amplier is used with
high source and feedback resistors. High frequency noise
from the amplier tail current source, ITAIL in Figure 1,
couples through the input capacitance and appears across
these large source and feedback resistors.
Stability
The good noise performance of these op amps can be
attributed to large input devices in the differential pair.
Above several hundred kilohertz, the input capacitance
can cause amplier stability problems if left unchecked.
When the feedback around the op amp is resistive (RF), a
pole will be created with RF, the source resistance, source
capacitance (RS, CS), and the amplier input capacitance.
In low gain congurations and with RF and RS in even
the kilohm range (Figure 3), this pole can create excess
phase shift and possibly oscillation. A small capacitor CF
in parallel with RF eliminates this problem.
Achieving Low Input Bias Current
The DD package is leadless and makes contact to the PCB
beneath the package. Solder ux used during the attach-
ment of the part to the PCB can create leakage current
paths and can degrade the input bias current performance
of the part. All inputs are susceptible because the backside
paddle is connected to V– internally. As the input voltage
changes or if V– changes, a leakage path can be formed
and alter the observed input bias current. For lowest bias
current, use the LTC6244 in the MS8 package.
Photodiode Ampliers
Photodiodes can be broken into two categories: large area
photodiodes with their attendant high capacitance (30pF
to 3000pF) and smaller area photodiodes with relatively
low capacitance (10pF or less). For optimal signal-to-noise
performance, a transimpedance amplier consisting of an
inverting op amp and a feedback resistor is most commonly
used to convert the photodiode current into voltage. In low
noise amplier design, large area photodiode ampliers
require more attention to reducing op amp input voltage
noise, while small area photodiode ampliers require
more attention to reducing op amp input current noise
and parasitic capacitances.
Figure 3. Compensating Input Capacitance
APPLICATIONS INFORMATION
+
–
CIN
CS
6244 F03
RF
RS
OUTPUT
CF
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC6244IDD | 制造商:LINER 制造商全称:Linear Technology 功能描述:Dual 50MHz, Low Noise, Rail-to-Rail, CMOS Op Amp |
| LTC6244IDD#PBF | 功能描述:IC OP AMP DUAL R-R 8-DFN RoHS:是 类别:集成电路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 产品培训模块:Differential Circuit Design Techniques for Communication Applications 标准包装:1 系列:- 放大器类型:RF/IF 差分 电路数:1 输出类型:差分 转换速率:9800 V/µs 增益带宽积:- -3db带宽:2.9GHz 电流 - 输入偏压:3µA 电压 - 输入偏移:- 电流 - 电源:40mA 电流 - 输出 / 通道:- 电压 - 电源，单路/双路(±):3 V ~ 3.6 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:16-VQFN 裸露焊盘，CSP 供应商设备封装:16-LFCSP-VQ 包装:剪切带 (CT) 产品目录页面:551 (CN2011-ZH PDF) 其它名称:ADL5561ACPZ-R7CT |
| LTC6244IDD#TRPBF | 功能描述:IC OP AMP DUAL R-R 8-DFN RoHS:是 类别:集成电路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 标准包装:50 系列:- 放大器类型:通用 电路数:2 输出类型:满摆幅 转换速率:1.8 V/µs 增益带宽积:6.5MHz -3db带宽:4.5MHz 电流 - 输入偏压:5nA 电压 - 输入偏移:100µV 电流 - 电源:65µA 电流 - 输出 / 通道:35mA 电压 - 电源，单路/双路(±):1.8 V ~ 5.25 V，±0.9 V ~ 2.625 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:10-TFSOP，10-MSOP（0.118"，3.00mm 宽） 供应商设备封装:10-MSOP 包装:管件 |
| LTC6244IMS8 | 制造商:LINER 制造商全称:Linear Technology 功能描述:Dual 50MHz, Low Noise, Rail-to-Rail, CMOS Op Amp |
| LTC6244IMS8#PBF | 功能描述:IC OP AMP DUAL R-R 8-MSOP RoHS:是 类别:集成电路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 产品培训模块:Differential Circuit Design Techniques for Communication Applications 标准包装:1 系列:- 放大器类型:RF/IF 差分 电路数:1 输出类型:差分 转换速率:9800 V/µs 增益带宽积:- -3db带宽:2.9GHz 电流 - 输入偏压:3µA 电压 - 输入偏移:- 电流 - 电源:40mA 电流 - 输出 / 通道:- 电压 - 电源，单路/双路(±):3 V ~ 3.6 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:16-VQFN 裸露焊盘，CSP 供应商设备封装:16-LFCSP-VQ 包装:剪切带 (CT) 产品目录页面:551 (CN2011-ZH PDF) 其它名称:ADL5561ACPZ-R7CT |
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