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LT1684CS#PBF

Description
Micropower Ring Tone Generator 10V 14-Pin SOIC N Tube
File Size223KB,16 Pages
ManufacturerADI
Websitehttps://www.analog.com
Download Datasheet Parametric Compare View All

LT1684CS#PBF Overview

Micropower Ring Tone Generator 10V 14-Pin SOIC N Tube

LT1684CS#PBF Parametric

Parameter NameAttribute value
EU restricts the use of certain hazardous substancesCompliant
ECCN (US)EAR99
Part StatusLTB
HTS8542.39.00.01
Product CategoryMicropower Ring Tone Generator
Transmission Media TypeOptical Fiber
Minimum Operating Supply Voltage (V)6.5
Typical Operating Supply Voltage (V)10
Power Supply TypeAnalog
Typical Supply Current (mA)0.68
Minimum Operating Temperature (°C)0
Maximum Operating Temperature (°C)125
PackagingTube
Pin Count14
Standard Package NameSOP
Supplier PackageSOIC N
MountingSurface Mount
Package Height1.5(Max)
Package Length8.74(Max)
Package Width3.99(Max)
PCB changed14
Lead ShapeGull-wing
LT1684
Micropower
Ring Tone Generator
FEATURES
s
s
DESCRIPTIO
s
s
s
s
s
s
s
s
s
Allows Dynamic Control of Output Frequency,
Cadence, Amplitude and DC Offset
Active Tracking Supply Configuration Allows Linear
Generation of Ring Tone Signal
No High Voltage Post-Filtering Required
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
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.
APPLICATIO S
s
s
s
Wireless Local Loop Telephones
Key System/PBX Equipment
Fiber to the Curb Telecom Equipment
TYPICAL APPLICATIO
PWM
CONTROLLER
P1
µC
P2
DC
ISOLATION
100pF
Electrically Isolated Ring Tone Generator
100V
6.8nF
IN A
10k
IN B
LT1684
LIM
+
OUT
AT
REF
COMP1
GATE
+
FB1
V
+
1N4001
100Ω
100k
IRF610
10k
100pF
100pF
0.1µF
BG
OUT
3k
2k
300k
1µF
5k
AMPIN
4700pF
20pF
COMP2
LIM
V
GATE
6.8nF
1N5817
100Ω
IRF9610
100k
–100V
FB1: FERRONICS FMB1601
(716) 388-1020
U
+
RING TONE
OUTPUT
U
U
(
±100mA
CAPABILITY
)
1684 TA01
1

LT1684CS#PBF Related Products

LT1684CS#PBF LT1684CN#PBF LT1684CS#TRPBF LT1684IN#PBF LT1684IS#PBF LT1684IS#TRPBF
Description Micropower Ring Tone Generator 10V 14-Pin SOIC N Tube Micropower Ring Tone Generator 10V 14-Pin PDIP N Tube Micropower Ring Tone Generator 14-Pin SOIC N T/R Micropower Ring Tone Generator 10V 14-Pin PDIP N Tube Micropower Ring Tone Generator 10V 14-Pin SOIC N Tube Micropower Ring Tone Generator 14-Pin SOIC N T/R
EU restricts the use of certain hazardous substances Compliant Compliant Compliant Compliant Compliant Compliant
ECCN (US) EAR99 EAR99 EAR99 EAR99 EAR99 EAR99
Part Status LTB LTB LTB LTB LTB LTB
HTS 8542.39.00.01 8542.39.00.01 8542.39.00.01 8542.39.00.01 8542.39.00.01 8542.39.00.01
Product Category Micropower Ring Tone Generator Micropower Ring Tone Generator Micropower Ring Tone Generator Micropower Ring Tone Generator Micropower Ring Tone Generator Micropower Ring Tone Generator
Transmission Media Type Optical Fiber Optical Fiber Optical Fiber Optical Fiber Optical Fiber Optical Fiber
Minimum Operating Supply Voltage (V) 6.5 6.5 6.5 6.5 6.5 6.5
Typical Operating Supply Voltage (V) 10 10 10 10 10 10
Power Supply Type Analog Analog Analog Analog Analog Analog
Typical Supply Current (mA) 0.68 0.68 0.68 0.68 0.68 0.68
Maximum Operating Temperature (°C) 125 125 125 125 125 125
Packaging Tube Tube Tape and Reel Tube Tube Tape and Reel
Pin Count 14 14 14 14 14 14
Standard Package Name SOP DIP SOP DIP SOP SOP
Supplier Package SOIC N PDIP N SOIC N PDIP N SOIC N SOIC N
Mounting Surface Mount Through Hole Surface Mount Through Hole Surface Mount Surface Mount
Package Height 1.5(Max) 3.3 1.5(Max) 3.3 1.5(Max) 1.5(Max)
Package Length 8.74(Max) 19.56(Max) 8.74(Max) 19.56(Max) 8.74(Max) 8.74(Max)
Package Width 3.99(Max) 6.48 3.99(Max) 6.48 3.99(Max) 3.99(Max)
PCB changed 14 14 14 14 14 14
Lead Shape Gull-wing Through Hole Gull-wing Through Hole Gull-wing Gull-wing
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