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
25Ω
LOAD
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 25Ω load 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
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
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
Cross Section View Showing Exposed-Pad
This pad can be connected to a (-Vcc) copper area on the PCB
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)
December 2002
1/10
TS635
ABSOLUTE MAXIMUM RATINGS
Symbol
V
CC
V
id
V
in
T
oper
T
std
T
j
SO8
R
thjc
R
thja
P
max.
Supply voltage
1)
Differential Input Voltage
2)
Input Voltage Range
3)
Operating Free Air Temperature Range TS635ID
Storage Temperature
Maximum Junction Temperature
Thermal Resistance Junction to Case
Thermal Resistance Junction to Ambient Area
Parameter
Value
±7
±2
±6
-40 to + 85
-65 to +150
150
28
175
715
16
60
2000
Unit
V
V
V
°C
°C
°C
°C/W
°C/W
mW
°C/W
°C/W
mW
Maximum Power Dissipation (@25°C)
SO8 Exposed-Pad
R
thjc
Thermal Resistance Junction to Case
R
thja
P
max.
Thermal Resistance Junction to Ambient Area
Maximum Power Dissipation (@25°C)
1. All voltages values, except differential voltage are with respect to network terminal.
2. Differential voltages are non-inverting input terminal with respect to the inverting input terminal.
3. The magnitude of input and output voltages must never exceed V
CC
+0.3V.
OPERATING CONDITIONS
Symbol
V
CC
V
icm
Supply Voltage
Common Mode Input Voltage
Parameter
Value
±2.5 to ±6
(V
CC
) +2 to (V
CC+
) -1
Unit
V
V
APPLICATION: ADSL LINE INTERFACE
ASCOT ADSL
CHIP-SET
TX
emission
LP filter
(analog
signal)
TS635
Line Driver
upstream
ST70135
ST70134
Power Down
HYBRID
CIRCUIT
RX
reception
(analog signal)
twisted-pair
telephone
line
VGA
downstream
TS636
Receiver
4-bit Gain Control
2/10
TS635
ELECTRICAL CHARACTERISTICS.
Symbol
Parameter
Differential Input Offset Voltage
Input Offset Current
Input Bias Current
Common Mode Rejection Ratio
Supply Voltage Rejection Ratio
Total Supply Current per Operator
High Level Output Voltage
Low Level Output Voltage
Large Signal Voltage Gain
V
CC
= ±6V, T
amb
= 25°C (unless otherwise specified).
Test Condition
T
amb
= 25°C
T
amb
T
min.
< T
amb
< T
max.
T
amb
T
min.
< T
amb
< T
max.
V
ic
= 2V to 2V, T
amb
T
min.
< T
amb
< T
max.
V
ic
= ±6V to ±4V, T
amb
T
min.
< T
amb
< T
max.
No load, V
out
= 0
I
out
= 160mA, R
L
to GND
I
out
= 160mA, R
L
to GND
V
out
= 7V peak
R
L
= 25Ω, T
amb
T
min.
< T
amb
< T
max.
A
VCL
= +7, f = 20MHz
R
L
= 100Ω
A
VCL
= +7, R
L
= 50Ω
V
id
= ±1V, T
amb
T
min.
< T
amb
< T
max.
R
L
= 25Ω//15pF
R
L
= 25Ω//15pF
f = 100kHz
f = 100kHz
V
out
= 4Vpp, f = 100kHz
A
VCL
= -10
R
L
= 25Ω//15pF
F1 = 80kHz, F2 = 70kHz
V
out
= 8Vpp, A
VCL
= -10
Load = 25Ω//15pF
F1 = 80kHz, F2 = 70kHz
V
out
= 8Vpp, A
VCL
= -10
Load = 25Ω//15pF
90
70
70
50
Min.
Typ.
Max
6
3
5
15
30
Unit
mV
µA
µA
dB
dB
15
mA
V
-4
V
V/V
DC PERFORMANCE
∆V
io
I
io
I
ib
CMR
SVR
I
CC
V
OH
V
OL
A
VD
GBP
SR
I
out
I
sink
I
source
ΦM14
ΦM6
en
in
THD
0.2
5
108
88
11
4
4.5
-4.5
6500
5000
130
23
±160
±140
60
40
3.2
1.5
-69
40
±240
MHz
V/µs
mA
mA
°
°
nV/√Hz
pA/√Hz
dB
11000
DYNAMIC PERFORMANCE
Gain Bandwidth Product
Slew Rate
Output Short Circuit Current
Output Current
Phase Margin at A
VCL
= 14dB
Phase Margin at A
VCL
= 6dB
Equivalent Input Noise Voltage
Equivalent Input Noise Current
Total Harmonic Distorsion
NOISE AND DISTORTION
IM2
-10
2nd Order Intermodulation Product
-77
dBc
IM3
-10
3rd Order Intermodulation Product
-77
dBc
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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 25Ω.
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
Ω
, 2 tones 70kHz/
80kHz
3rd ORDER INTERMODULATION
Gain=15dB, Vcc=
±
6V, RL=25
Ω
, 2 tones 180kHz/
280kHz
0
-10
-20
0
-10
-20
-30
IM3 (dBc)
-30
IM3 (dBc)
-40
-50
-60
-70
-80
-90
-100
1
-40
-50
-60
-70
-80
80kHz
380kHz
90kHz
230kHz
60kHz
220kHz
1,5
2
2,5
3
3,5
4
4,5
640kHz
740kHz
-90
-100
1
1,5
2
2,5
3
3,5
4
4,5
Vout peak (V)
Vout peak (V)
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TS635
Closed Loop Gain and Phase vs. Frequency
Gain=+2, Vcc=
±
6V, RL=25
Ω
Closed Loop Gain and Phase vs. Frequency
Gain=+6, Vcc=
±
6V, RL=25
Ω
10
200
20
200
Gain
15
0
100
Phase (degrees)
10
Gain
100
Phase (degrees)
Gain (dB)
-10
Phase
Gain (dB)
5
Phase
0
-5
0
0
-20
-100
-10
-15
-100
-30
-200
-20
-200
10kHz
100kHz
1MHz
10MHz
100MHz
10kHz
100kHz
1MHz
10MHz
100MHz
Frequency
Frequency
Closed Loop Gain and Phase vs. Frequency
Gain=+11, Vcc=
±
6V, RL=25
Ω
Equivalent Input Voltage Noise
Gain=+100, Vcc=
±
6V, no load
30
200
20
Gain
20
100
15
en (nV/VHz)
+
_
10k
10
Phase
0
0
Phase (degrees)
Gain (dB)
10
100
-10
-20
-30
-100
5
-200
0
100Hz
1kHz
10kHz
100kHz
1MHz
Frequency
10kHz
100kHz
1MHz
10MHz
Frequency
100MHz
Maximum Output Swing
Vcc=
±
6V, RL=25
Ω
Channel Separation (Xtalk) vs. Frequency
XTalk=20Log(V2/V1), Vcc=
±
6V, RL=25
Ω
5
4
3
2
-20
VIN
output
-30
-40
-50
-60
-70
-80
+
49.9Ω
_
V1
1kΩ
25Ω
100Ω
swing (V)
1
0
-1
-2
-3
-4
-5
0
2
input
Xtalk (dB)
+
49.9Ω
_
V2
1kΩ
25Ω
100Ω
4
6
8
10
10kHz
100kHz
1MHz
10MHz
Time (µs)
Frequency
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