- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄361042 > LMV111 (National Semiconductor Corporation) Operational Amplifier with Bias Network PDF資料下載
參數(shù)資料
| 型號(hào)： | LMV111 |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | Operational Amplifier with Bias Network |
| 中文描述： | 運(yùn)算放大器的偏置網(wǎng)絡(luò) |
| 文件頁(yè)數(shù)： | 6/9頁(yè) |
| 文件大?。?/td> | 337K |
| 代理商： | LMV111 |
Typical Performance Characteristics
(Unless otherwise specified, V
S
= +5V, single supply, T
A
=
25C.) (Continued)
Application Section
The LMV111 integrates a rail-to-rail op amp and a V
+
/2 bias
circuit into one ultra tiny package. With its small footprint and
reduced component count for bias network, it enables the
design of smaller portable electronic products, such as cellu-
lar phones, pagers, PDAs, PCMCIA cards, etc. In addition,
the integration solution minimizes printed circuit board stray
capacitance, and reduces the complexity of circuit design.
The core op amp of this family is National’s LMV321.
1.0 Supply Bypassing
The application circuits in this datasheet do not show the
power supply connections and the associated bypass ca-
pacitors for simplification. When the circuits are built, it is al-
ways required to have bypass capacitors. Ceramic disc ca-
pacitors (0.1μF) or solid tantalum (1μF) with short leads, and
located close to the IC are usually necessary to prevent in-
terstage coupling through the power supply internal imped-
ance. Inadequate bypassing will manifest itself by a low fre-
quency
oscillation
or
by
high
Sometimes, a 10μF (or larger) capacitor is used to absorb
low frequency variations and a smaller 0.1μF disc is paral-
leled across it to prevent any high frequency feedback
through the power supply lines.
2.0 Input Voltage Range
The input voltage should be within the supply rails. The ESD
protection circuitry at the input of the device includes a diode
between the input pin and the negative supply pin. Driving
the input more than 0.6V (at 25C) beyond the negative sup-
ply will turn on the diode and cause signal distortions.
3.0 Capacitive Load Tolerance
The LMV111 can directly drive 200pF capacitive load with
unity gain without oscillation. The unity-gain follower is the
most sensitive configuration to capacitive loading. Direct ca-
pacitive loading reduces the phase margin of amplifiers. The
combination of the amplifier’s output impedance and the ca-
pacitive load induces phase lag. This results in either an un-
derdamped pulse or oscillation. To drive a heavier capacitive
load, a resistive isolation can be used as shown in Figure 1
frequency
instabilities.
The isolation resistor R
and the C
form a pole to increase
stability by adding more phase margin to the overall system.
The desired performance depends on the value of R
. A
50
to 100
isolation resistor is recommended for initial
evaluation. The bigger the R
iso
resistor value, the more
stable V
OUT
will be.
Output Voltage Swing vs.
Supply Voltage
DS101262-22
DS101262-23
FIGURE 1. Resistive Isolation of a Heavy Capacitive
Load
L
www.national.com
6
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LMV111M5X | Operational Amplifier with Bias Network |
| LMV111M7 | Operational Amplifier with Bias Network |
| LMV111M7X | Operational Amplifier with Bias Network |
| LMV111M5 | Hook-Up Wire; Conductor Size AWG:22; No. Strands x Strand Size:7 x 30; Jacket Color:White/Black; Cable/Wire MIL SPEC:MIL-W-16878/1 Type B; Conductor Material:Copper; Jacket Material:Polyvinylchloride (PVC) RoHS Compliant: Yes |
| LMV115 | GSM Baseband 30MHz 2.8V Oscillator Buffer |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LMV111 WAF | 制造商:Texas Instruments 功能描述: |
| LMV111M5 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Operational Amplifier with Bias Network |
| LMV111M5X | 功能描述:IC OP AMP W/BIAS NETWORK SOT23-5 RoHS:是 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 標(biāo)準(zhǔn)包裝:1,000 系列:- 放大器類型:電壓反饋 電路數(shù):4 輸出類型:滿擺幅 轉(zhuǎn)換速率:33 V/µs 增益帶寬積:20MHz -3db帶寬:30MHz 電流 - 輸入偏壓:2nA 電壓 - 輸入偏移:3000µV 電流 - 電源:2.5mA 電流 - 輸出 / 通道:30mA 電壓 - 電源，單路/雙路(±):4.5 V ~ 16.5 V，±2.25 V ~ 8.25 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:14-SOIC（0.154"，3.90mm 寬） 供應(yīng)商設(shè)備封裝:14-SOIC 包裝:帶卷 (TR) |
| LMV111M7 | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| LMV111M7X | 功能描述:IC OP AMP W/BIAS NETWORK SC-70-5 RoHS:是 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 標(biāo)準(zhǔn)包裝:1,000 系列:- 放大器類型:電壓反饋 電路數(shù):4 輸出類型:滿擺幅 轉(zhuǎn)換速率:33 V/µs 增益帶寬積:20MHz -3db帶寬:30MHz 電流 - 輸入偏壓:2nA 電壓 - 輸入偏移:3000µV 電流 - 電源:2.5mA 電流 - 輸出 / 通道:30mA 電壓 - 電源，單路/雙路(±):4.5 V ~ 16.5 V，±2.25 V ~ 8.25 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:14-SOIC（0.154"，3.90mm 寬） 供應(yīng)商設(shè)備封裝:14-SOIC 包裝:帶卷 (TR) |
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。