Datasheet > LMV115MG

LMV115MG

更新时间： 2024-01-26 17:42:25

品牌	Logo	应用领域
美国国家半导体 - NSC		振荡器 GSM
页数	文件大小	规格书
13页	473K
描述
GSM Baseband 30MHz 2.8V Oscillator Buffer

阅读下载

中文翻译

获取价格

技术参数
数据手册

如果您发现信息不准确，欢迎纠错

LMV115MG 技术参数

是否无铅：	不含铅	是否Rohs认证：	符合
生命周期：	Obsolete	零件包装代码：	SOIC
包装说明：	TSSOP, TSSOP6,.08	针数：	6
Reach Compliance Code：	compliant	ECCN代码：	EAR99
HTS代码：	8542.33.00.01	风险等级：	5.84
Is Samacsys：	N	放大器类型：	BUFFER
标称带宽 (3dB)：	9 MHz	JESD-30 代码：	R-PDSO-G6
JESD-609代码：	e3	长度：	2 mm
湿度敏感等级：	1	负供电电压上限：
标称负供电电压 (Vsup)：		功能数量：	1
端子数量：	6	最高工作温度：	85 °C
最低工作温度：	-40 °C	最小输出电流：	0.1 A
封装主体材料：	PLASTIC/EPOXY	封装代码：	TSSOP
封装等效代码：	TSSOP6,.08	封装形状：	RECTANGULAR
封装形式：	SMALL OUTLINE, THIN PROFILE, SHRINK PITCH	峰值回流温度（摄氏度）：	260
电源：	2.8 V	认证状态：	Not Qualified
座面最大高度：	1.1 mm	标称压摆率：	18 V/us
子类别：	Buffer Amplifiers	最大压摆率：	0.52 mA
供电电压上限：	3.6 V	标称供电电压 (Vsup)：	2.8 V
表面贴装：	YES	温度等级：	INDUSTRIAL
端子面层：	Matte Tin (Sn)	端子形式：	GULL WING
端子节距：	0.65 mm	端子位置：	DUAL
处于峰值回流温度下的最长时间：	40	宽度：	1.25 mm
Base Number Matches：	1

LMV115MG 数据手册

Application Section

GENERAL

The LMV115 is specially designed to minimize the effects of

spurious signals from the base band chip to the oscillator.

Beside this the influence of varying load resistance and

capacitance to the oscillator is minimized, while increasing

the drive capability. The input of the LMV115 is internally

biased with two equal resistors to the power supply rails, and

makes AC coupling possible without external bias resistors

at the input. The LMV115 has excellent gain phase margin.

The LMV115 offers a shutdown pin that can be used to

disable the device in order to optimize current consumption

and also has a feature to control the supply voltage to an

external oscillator. When the shutdown pin is connected to

V_DDthe device is in shutdown mode.

SWITCHED POWER SUPPLY CONNECTION

The LMV115 features an enable/disable function for an ex-

ternal oscillator by controlling its supply voltage (pin 4). See

also the schematic diagram on the front page. During normal

operating mode, pin 4 is connected to the positive supply rail

via an internal switch. The resistance between the positive

supply rail and pin 4, R_ON, is specified in the electrical

characterization table. Oscillators with a supply current up to

several milliamps can easily be powered from pin 4. During

shutdown, pin 4 is switched to the negative supply rail. The

simplified schematic for this part of the device is shown in

Figure 1

20075132

FIGURE 2. Dual Supply Mode

PSRR

If an AC signal is applied to one of the supply lines, while the

input is floating, the signal at the input pin is half the signal at

the supply line, causing the same signal at the output of the

buffer. This will result in a PSRR of only 6dB (see Figure 2).

In a typical application the input is driven from a low ohmic

source that means the disturbance at the supply lines is

attenuated by the series resistors of 110k and the source

impedance. In case the buffer is connected to a 50Ω source,

the resulting suppression will be 20*log [(R₁+ R_BIAS)/R_BIAS

]

= 67dB for signals at the supply line. The PSRR can also be

measured correctly for this type of input by shorten the input

to mid-supply. Due to the internal structure it is not recom-

mended to measure with the input connected to ground. To

measure correctly the PSRR, two signals are applied to both

V_DDand V_EEbut with 180˚ phase difference (see Figure 2).

In this case, both signals are subtracted and there will be no

signal at the input. The resulting disturbance at the output is

now only caused by the signals at the supply lines.

INPUT AND OUTPUT LEVEL

Due to the internal loop gain of 1, the output will follow the

input. The output voltage cannot swing as close to the supply

rail as the input voltage. For linear operation the input volt-

age swing should not exceed the output voltage swing. The

restrictions for the output voltage can be examined by the

two curves in Figure 3. The curve V_OUT(V) shows the

response of the output signal versus the input signal and the

curve V_OUT– V_IN(V) shows the difference between the

output and the input signal.

20075131

FIGURE 1. Supply For External Oscillator

INPUT CONFIGURATION

The input of the LMV115 is internally biased at mid-supply by

a divider of two equal resistors. With the LMV115 in shut-

down mode, the internal resistor connected to the V_DDis

shortened to the negative power supply rail via a switch. This

makes the power consumption in ‘off’ mode almost zero, but

causes a small difference for the input impedance between

the on and off modes. Both resistors are 110kΩ so the

resulting input impedance will be approximately 55kΩ. The

input configuration allows AC coupling on the input of the

LMV115. A simplified schematic of the input is shown in

Figure 2.

www.national.com

1...7 8 91011 12 13

中文翻译

下载PDF

与LMV115MG相关器件

型号	品牌	获取价格	描述	数据表
LMV115MGX	NSC	获取价格	GSM Baseband 30MHz 2.8V Oscillator Buffer
LMV115MGX/NOPB	TI	获取价格	BUFFER AMPLIFIER, PDSO6, 2.10 X 2 MM, SC-70, 6 PIN
LMV116	NSC	获取价格	Low Voltage, 45MHz, Rail-to-Rail Output Operational Amplifiers with Shutdown Option
LMV116	TI	获取价格	单路、12V、45MHz 运算放大器
LMV116MF	NSC	获取价格	Low Voltage, 45MHz, Rail-to-Rail Output Operational Amplifiers with Shutdown Option
LMV116MF/NOPB	NSC	获取价格	IC OP-AMP, 5000 uV OFFSET-MAX, PDSO5, SOT-23, 5-PIN, Operational Amplifier
LMV116MF/NOPB	ROCHESTER	获取价格	OP-AMP, 5000uV OFFSET-MAX, PDSO5, SOT-23, 5-PIN
LMV116MF/NOPB	TI	获取价格	Single, 12-V, 45-MHz operational amplifier \| DBV \| 5 \| -40 to 85
LMV116MFX	NSC	获取价格	Low Voltage, 45MHz, Rail-to-Rail Output Operational Amplifiers with Shutdown Option
LMV116MFX/NOPB	TI	获取价格	Single, 12-V, 45-MHz operational amplifier \| DBV \| 5 \| -40 to 85

与LMV115MG相关文章

LM317T数据手册解读：产品特性、应用、封装与引脚详解
2024-06-14

5
一文带你了解?DB3二极管好坏判断、参数信息、替代推荐
2024-06-14

10
LM358DR数据手册：引脚说明、电气参数及替换型号推荐
2024-06-14

4
OP07CP数据手册解读：引脚信息、电子参数
2024-06-14

4

产品中心

服务支持

精选活动

关于我们

帮助中心

LMV115MG

LMV115MG 技术参数

LMV115MG 数据手册

与LMV115MG相关器件

与LMV115MG相关文章

您还可以找

产品中心

服务支持

精选活动

关于我们

帮助中心

LMV115MG

LMV115MG 技术参数

LMV115MG 数据手册

与LMV115MG相关器件

与LMV115MG相关文章

您还可以找

您在本页遇到什么问题？