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參數資料
| 型號： | LT1684IS |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 無繩電話/電話 |
| 英文描述： | Micropower Ring Tone Generator |
| 中文描述： | TELEPHONE RINGER CKT, PDSO14 |
| 封裝： | 0.150 INCH, PLASTIC, SOP-14 |
| 文件頁數： | 1/16頁 |
| 文件大?。?/td> | 221K |
| 代理商： | LT1684IS |
1
LT1684
Micropower
Ring Tone Generator
I
Allows Dynamic Control of Output Frequency,
Cadence, Amplitude and DC Offset
I
Active Tracking Supply Configuration Allows Linear
Generation of Ring Tone Signal
I
No High Voltage Post-Filtering Required
I
Capacitive Isolation Eliminates Optocouplers
I
Low Distortion Output Meets International
PTT Requirements
I
Differential Input Signal for Noise Immunity
I
User Adjustable Active Output Current Limit
I
Powered Directly From High Voltage Ringer
Supply—No Additional Supplies Necessary
I
Supply Current: <1mA
I
2% Signal Amplitude Reference
I
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.
, LTC and LT are registered trademarks of Linear Technology Corporation.
I
Wireless Local Loop Telephones
I
Key System/PBX Equipment
I
Fiber to the Curb Telecom Equipment
IN A
GATE
+
IN B
6.8nF
IRF9610
IRF610
100k
V
+
P1
μ
C
P2
LIM
+
OUT
AT
REF
COMP1
BG
OUT
COMP2
LIM
–
AMPIN
V
–
GATE
–
100pF
1N4001
20pF
100pF
100pF
DC
ISOLATION
PWM
CONTROLLER
100
10k
10k
1N5817
0.1
μ
F
1
μ
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
DESCRIPTIOU
APPLICATIU
TYPICAL APPLICATIO
U
Electrically Isolated Ring Tone Generator
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相關代理商/技術參數 |
參數描述 |
|---|---|
| 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:- 產品培訓模塊:Lead (SnPb) Finish for COTS 產品變化通告:Product Discontinuation 06/Feb/2012 標準包裝: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:- 產品培訓模塊:Lead (SnPb) Finish for COTS 產品變化通告:Product Discontinuation 06/Feb/2012 標準包裝: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:- 產品培訓模塊:Lead (SnPb) Finish for COTS 產品變化通告:Product Discontinuation 06/Feb/2012 標準包裝:750 系列:* |
| LT-16C | 制造商:Thomas & Betts 功能描述: |
| LT16CT26A102J1000 | 制造商:KOA 制造商全稱:KOA Speer Electronics, Inc. 功能描述:linear positive miniature tempco thermistor |
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