參數(shù)資料
型號(hào)： LT1684IS
廠商： Linear Technology
文件頁數(shù)： 1/16頁
文件大小： 0K
描述： IC RING TONE GENERATOR 14-SOIC
標(biāo)準(zhǔn)包裝： 55
功能： 音頻發(fā)生器
電路數(shù)： 1
工作溫度： -40°C ~ 125°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： 管件
1
LT1684
Micropower
Ring Tone Generator
s
Allows Dynamic Control of Output Frequency,
Cadence, Amplitude and DC Offset
s
Active Tracking Supply Configuration Allows Linear
Generation of Ring Tone Signal
s
No High Voltage Post-Filtering Required
s
Capacitive Isolation Eliminates Optocouplers
s
Low Distortion Output Meets International
PTT Requirements
s
Differential Input Signal for Noise Immunity
s
User Adjustable Active Output Current Limit
s
Powered Directly From High Voltage Ringer
Supply—No Additional Supplies Necessary
s
Supply Current: < 1mA
s
2% Signal Amplitude Reference
s
Available in 14-Pin SO and DIP Packages
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.
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.
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.
s
Wireless Local Loop Telephones
s
Key System/PBX Equipment
s
Fiber to the Curb Telecom Equipment
IN A
GATE+
IN B
6.8nF
IRF9610
IRF610
100k
V+
P1
C
P2
LIM+
OUT
BGOUT
ATREF
COMP1
COMP2
AMPIN
LIM–
V–
GATE–
100pF
1N4001
20pF
100pF
DC
ISOLATION
PWM
CONTROLLER
100
10k
1N5817
0.1
F
1
F
3k
5k
2k
300k
6.8nF
100k
100
RING TONE
OUTPUT
±100mA
CAPABILITY
100V
+
–
–100V
LT1684
4700pF
1684 TA01
FB1
()
FB1: FERRONICS FMB1601
(716) 388-1020
FEATURES
DESCRIPTIO
U
APPLICATIO S
U
TYPICAL APPLICATIO
U
, LTC and LT are registered trademarks of Linear Technology Corporation.
Electrically Isolated Ring Tone Generator
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參數(shù)描述
LT1684IS#PBF 功能描述:IC RING TONE GENERATOR 14-SOIC RoHS:是 類別:集成電路 (IC) >> 接口 - 電信 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS 產(chǎn)品變化通告:Product Discontinuation 06/Feb/2012 標(biāo)準(zhǔn)包裝:750 系列:*
LT1684IS#TR 功能描述:IC GENERATOR RING TONE 14SOIC RoHS:否 類別:集成電路 (IC) >> 接口 - 電信 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS 產(chǎn)品變化通告:Product Discontinuation 06/Feb/2012 標(biāo)準(zhǔn)包裝:750 系列:*
LT1684IS#TRPBF 功能描述:IC RING TONE GENERATOR 14-SOIC RoHS:是 類別:集成電路 (IC) >> 接口 - 電信 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS 產(chǎn)品變化通告:Product Discontinuation 06/Feb/2012 標(biāo)準(zhǔn)包裝:750 系列:*
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