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TS635ID 데이터시트 PDF




STMicroelectronics에서 제조한 전자 부품 TS635ID은 전자 산업 및 응용 분야에서
광범위하게 사용되는 반도체 소자입니다.


PDF 형식의 TS635ID 자료 제공

부품번호 TS635ID 기능
기능 DUAL WIDE BAND OPERATIONAL AMPLIFIER FOR ADSL LINE INTERFACE
제조업체 STMicroelectronics
로고 STMicroelectronics 로고


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TS635ID 데이터시트, 핀배열, 회로
TS635
DUAL WIDE BAND OPERATIONAL AMPLIFIER
FOR ADSL LINE INTERFACE
s LOW NOISE : 3.2nV/Hz, 1.5pA/Hz
s HIGH OUTPUT CURRENT : 160mA min.
s VERY LOW HARMONIC AND INTERMODU-
LATION DISTORTION
s HIGH SLEW RATE : 40V/µs
s SPECIFIED FOR 25LOAD
DESCRIPTION
This device is particularly intended for applications
where multiple carriers must be amplified simulta-
neously with very low intermodulation products. It
has been mainly designed to fit with ADSL
chip-set such as ST70134 or ST70135.
The TS635 is a high output current dual operation-
al amplifier, with a large gain-bandwidth product
(130MHz) and capable of driving a 25load at
12V power supply. The TS635 is fitted out with
Power Down function in order to decrease the
consumption.
The TS635 is housed in a SO8 plastic package
and a SO8 Exposed-Pad plastic package.
APPLICATION
s UPSTREAM line driver for Asymmetric Digital
Subscriber Line (ADSL) (NT).
ORDER CODE
Part
Number
TS635ID
TS635IDW
Temperature
Range
-40, +85°C
-40, +85°C
Package
D DW
D = Small Outline Package (SO) - also available in Tape & Reel (DT)
DW = Small Outline Package in Exposed-Pad (SO) - also available in
Tape & Reel (DWT)
D
SO8
(Plastic Micropackage)
DW
SO8 Exposed-Pad
(Plastic Micropackage)
PIN CONNECTIONS (top view)
Output1 1
Inverting Input1 2
Non Inverting Input1 3
VCC - 4
_
+
8 VCC +
7 Output2
_ 6 Inverting Input2
+ 5 Non Inverting Input2
Cross Section View Showing Exposed-Pad
This pad can be connected to a (-Vcc) copper area on the PCB
December 2002
1/10




TS635ID pdf, 반도체, 판매, 대치품
TS635
INTERMODULATION DISTORTION
The curves shown below are the measurements results of a single operator wired as an adder with a gain
of 15dB.
The operational amplifier is supplied by a symmetric ±6V and is loaded with 25.
Two synthesizers (Rhode & Schwartz SME) generate two frequencies (tones) (70 & 80kHz ; 180 &
280kHz).
An HP3585 spectrum analyzer measures the spurious level at different frequencies.
The curves are traced for different output levels (the value in the X ax is the value of each tone).
The output levels of the two tones are the same.
The generators and spectrum analyzer are phase locked to enhance measurement precision.
3rd ORDER INTERMODULATION
Gain=15dB, Vcc=±6V, RL=25, 2 tones 70kHz/
80kHz
3rd ORDER INTERMODULATION
Gain=15dB, Vcc=±6V, RL=25, 2 tones 180kHz/
280kHz
0
-10
-20
-30
-40
90kHz
-50
230kHz
-60
-70
-80
60kHz
-90
-100
220kHz
1 1,5 2 2,5 3 3,5 4 4,5
Vout peak (V)
0
-10
-20
-30
-40
-50
80kHz
-60
380kHz
-70
-80
640kHz
-90
740kHz
-100
1 1,5 2 2,5 3 3,5 4 4,5
Vout peak (V)
4/10

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TS635ID 전자부품, 판매, 대치품
TS635
Component calculation:
Let us consider the equivalent circuit for a single
ended configuration, Figure 4.
Figure 4 : Single ended equivalent circuit
By identification of both equations (2) and (3), the
synthesized impedance is, with Rs1=Rs2=Rs:
Ro
=
------R----s------
1
R-----2-
R3
,(4
)
+
Vi _
1/2R1
R2
R3
Rs1
Vo°
Vo
-1
1/2RL
Figure 5 : Equivalent schematic. Ro is the syn-
thesized impedance
Vi.Gi
Ro Iout
1/2RL
Let us consider the unloaded system. Assuming
the currents through R1, R2 and R3
as respectively:
-2R---V--1---i,
(---V----i--------V----o---°---)-
R2
a
nd
(---V----i---+-----V----o----)
R3
As Vo° equals Vo without load, the gain in this
case becomes :
G
=
V-----o---(--n----o---l--o----a---d----)
Vi
=
1-----+------2---R----R----1----2-------+-----RR---------23---
1
R-----2-
R3
The gain, for the loaded system will be (1):
GL
=
V-----o---(---w----i--t--h----l--o---a----d---)-
Vi
=
-1-
2
-1----+------2---R----R-----1----2------+-----RR---------23---
1
R-----2-
R3
,(
1)
As shown in Figure 5, this system is an ideal gen-
erator with a synthesized impedance as the inter-
nal impedance of the system. From this, the out-
put voltage becomes:
Vo = (ViG) (RoIout),(2)
with Ro the synthesized impedance and Iout the
output current. On the other hand Vo can be ex-
pressed as:
Vo
=
V-----i-----1----+------2---R----R-----1---2-------+-----RR---------23------
1
R-----2-
R3
R-----s---1---I---o---u----t
1
R-----2-
R3
,(
3)
Unlike the level Vo° required for a passive imped-
ance, Vo° will be smaller than 2Vo in our case. Let
us write Vo°=kVo with k the matching factor vary-
ing between 1 and 2. Assuming that the current
through R3 is negligeable, it comes the following
resistance divider:
Ro
=
-----k---V-----o---R----L-------
RL + 2Rs1
After choosing the k factor, Rs will equal to
1/2RL(k-1).
A good impedance matching assumes:
Ro
=
-1-
2
R
L
,(
5
)
From (4) and (5) it becomes:
R-----2-
R3
=
1
-2---R----s-
RL
,(6
)
By fixing an arbitrary value for R2, (6) gives:
R3
=
-------R----2--------
1
-2---R----s-
RL
Finally, the values of R2 and R3 allow us to extract
R1 from (1), and it comes:
R1 = ------------------------2----R----2------------------------- ,(7)
2
1
RR-----23- 
GL
1
R-----2-
R3
with GL the required gain.
GL (gain for the
loaded system)
R1
R2 (=R4)
R3 (=R5)
Rs
GL is fixed for the application requirements
GL=Vo/Vi=0.5(1+2R2/R1+R2/R3)/(1-R2/R3)
2R2/[2(1-R2/R3)GL-1-R2/R3]
Abritrary fixed
R2/(1-Rs/0.5RL)
0.5RL(k-1)
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관련 데이터시트

부품번호상세설명 및 기능제조사
TS635ID

DUAL WIDE BAND OPERATIONAL AMPLIFIER FOR ADSL LINE INTERFACE

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TS635IDW

DUAL WIDE BAND OPERATIONAL AMPLIFIER FOR ADSL LINE INTERFACE

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