LT1684

更新时间： 2024-10-02 22:51:51

品牌	Logo	应用领域
凌特 - Linear		/
页数	文件大小	规格书
16页	224K
描述
Micropower Ring Tone Generator

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中文翻译

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技术参数
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LT1684 技术参数

是否Rohs认证：	不符合	生命周期：	Transferred
包装说明：	,	Reach Compliance Code：	compliant
风险等级：	5.66	Base Number Matches：	1

LT1684 数据手册

LT1684

Micropower

Ring Tone Generator

FEATURES

DESCRIPTIO

■

Allows Dynamic Control of Output Frequency,

The LT^®1684 is a telecommunication ring tone generator.

The IC takes a user-generated pulse width modulated

(PWM) input and converts it to a high voltage sine wave

suitable for telephone ringing applications.

Cadence, Amplitude and DC Offset

■

Active Tracking Supply Configuration Allows Linear

Generation of Ring Tone Signal

■

No High Voltage Post-Filtering Required

The LT1684 receives capacitor-isolated differential PWM

input signals encoded with desired ring output cadence,

frequency, and amplitude information. The LT1684 nor-

malizes the pulse amplitude to ±1.25V for an accurate

signal voltage reference. The cadence, frequency and

amplitude information is extracted using a multiple-

pole active filter/amplifier, producing the output ring tone

signal.

■

Capacitive Isolation Eliminates Optocouplers

■

Low Distortion Output Meets International

PTT Requirements

■

Differential Input Signal for Noise Immunity

■

User Adjustable Active Output Current Limit

■

Powered Directly From High Voltage Ringer

Supply—No Additional Supplies Necessary

■

Supply Current: <1mA

2% Signal Amplitude Reference

■

The LT1684 uses its own ring tone output as a reference

for generating local supply rails using complementary

high voltage external MOSFETs as dynamic level-shifting

devices. This “active tracking” supply mode of operation

allows linear generation of the high voltage ring tone

signal, reducing the need for large high voltage filtering

elements.

Available in 14-Pin SO and DIP Packages

APPLICATIO S

■

Wireless Local Loop Telephones

■

Key System/PBX Equipment

■

, LTC and LT are registered trademarks of Linear Technology Corporation.

Fiber to the Curb Telecom Equipment

TYPICAL APPLICATIO

Electrically Isolated Ring Tone Generator

100V

PWM

ISOLATION

CONTROLLER

6.8nF

100k

10k

100pF

µC

IN A

IN B

GATE

IRF610

100Ω

FB1

10k

LT1684

1N4001

LIM

OUT

100pF

20pF

REF

RING TONE

OUTPUT

±100mA

CAPABILITY

(

)

COMP1

OUT

0.1µF

–

1N5817

6.8nF

COMP2

–

AMPIN

LIM

–

4700pF

300k

100Ω

–

GATE

IRF9610

1µF

100k

–100V

FB1: FERRONICS FMB1601

(716) 388-1020

1684 TA01

12 3 4 5 6 7...16

中文翻译

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与LT1684相关器件

型号	品牌	获取价格	描述	数据表
LT1684CN	Linear	获取价格	Micropower Ring Tone Generator
LT1684CN#PBF	Linear	获取价格	LT1684 - Micropower Ring Tone Generator; Package: PDIP; Pins: 14; Temperature Range: 0&
LT1684CS	Linear	获取价格	Micropower Ring Tone Generator
LT1684CS#PBF	Linear	获取价格	LT1684 - Micropower Ring Tone Generator; Package: SO; Pins: 14; Temperature Range: 0&d
LT1684CS#TRPBF	Linear	获取价格	LT1684 - Micropower Ring Tone Generator; Package: SO; Pins: 14; Temperature Range: 0&d
LT1684IN	Linear	获取价格	Micropower Ring Tone Generator
LT1684IN#PBF	Linear	获取价格	LT1684 - Micropower Ring Tone Generator; Package: PDIP; Pins: 14; Temperature Range: -40&a
LT1684IS	Linear	获取价格	Micropower Ring Tone Generator
LT1684IS#TRPBF	Linear	获取价格	LT1684 - Micropower Ring Tone Generator; Package: SO; Pins: 14; Temperature Range: -40&
LT16CT26A102J1000	KOA	获取价格	linear positive miniature tempco thermistor

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