TS636 LINE INTERFACE Datasheet

TS636 Datasheet, PDF, Equivalent


Part Number

TS636

Description

DIFFERENTIAL VARIABLE GAIN AMPLIFIER FOR ADSL LINE INTERFACE

Manufacture

STMicroelectronics

Total Page 9 Pages
Datasheet
Download TS636 Datasheet


TS636
TS636
DIFFERENTIAL VARIABLE GAIN AMPLIFIER
FOR ADSL LINE INTERFACE
s LOW NOISE : 4.7nV/Hz
s LOW DISTORTION
s HIGH SLEW RATE : 90V/µs
s WIDE BANDWIDTH : 52MHz @ -3dB &
18dB gain
s GAIN PROGRAMMABLE from -9dB to +30dB
with 3dB STEPS
s POWER DOWN FUNCTION
DESCRIPTION
This TS636 is particularly intended for applica-
tions such as preamplification in telecommunica-
tion systems using multiple carriers. It has been
minly designed to fit with ADSL chip-sets such as
ASCOT ADSL chip-set for CPE.
The TS636 is a differential digitally controled vari-
able gain amplifier featuring a high slew rate of
90V/µs, a large bandwidth, a very low distortion
and a very low current and voltage noise.
The gain can be set from -9dB to +30dB through a
4bit digital word, with 3dB steps.
The gain monotonicity is guaranteed by design.
The TS636 comes in SO-14 plastic packages.
APPLICATION
s Preamplifier with automatic gain control for
Asymmetric Digital Subscriber Line (ADSL).
ORDER CODE
Part Number Temperature Range
TS636I
-40, +85°C
Package
D
D = Small Outline Package (SO) - also available in Tape & Reel (DT)
D
SO14
(Plastic Micropackage)
PIN CONNECTIONS (top view)
+Vcc1 1
Input 1 2
Input 2 3
LSB GC1 4
GC2 5
GC3 6
7
MSB GC4
14 +Vcc2
13 Output 1
12 Output 2
11 Power Down
10 -Vcc
9 AGND
8 DGND
January 2001
1/9

TS636
TS636
ABSOLUTE MAXIMUM RATINGS
Symbol
Parameter
VCC Supply voltage 1)
Vi Input Voltage 2)
Toper Operating Free Air Temperature Range TS636ID
Tstd Storage Temperature
Tj Maximum Junction Temperature
Rthjc Thermal Resistance Junction to Case
Rthja Thermal Resistance Junction to Ambiante Area
Output Short Circuit Duration
1. All voltages values are with respect to network terminal.
2. The magnitude of input and output voltages must never exceed VCC +0.3V.
OPERATING CONDITIONS
Symbol
Parameter
VCC
Vicm
Supply Voltage
Common Mode Input Voltage
APPLICATION: ADSL LINE INTERFACE
Value
14
0 to 14
-40 to + 85
-65 to +150
150
22
125
Infinite
Unit
V
V
°C
°C
°C
°C/W
°C/W
Value
5 to 12
VCC/2
Unit
V
V
ASCOT ADSL
CHIP-SET
ST70135 ST70134
TX
emission LP filter
(analog
signal)
Power Down
RX
reception
(analog signal)
upstream
TS634 or TS635
Line Driver
VGA
HYBRID
CIRCUIT
twisted-pair
telephone
line
downstream
TS636
Receiver
4-bit Gain Control
2/9


Features TS636 DIFFERENTIAL VARIABLE GAIN AMPLIFI ER FOR ADSL LINE INTERFACE s s s s LOW NOISE : 4.7nV/√Hz LOW DISTORTION HIGH SLEW RATE : 90V/µs WIDE BANDWIDTH : 5 2MHz @ -3dB & 18dB gain with 3dB STEPS s GAIN PROGRAMMABLE from -9dB to +30dB s POWER DOWN FUNCTION DESCRIPTION This TS636 is particularly intended for app lications such as preamplification in t elecommunication systems using multiple carriers. It has been minly designed t o fit with ADSL chip-sets such as ASCOT ADSL chip-set for CPE. The TS636 is a differential digitally controled variab le gain amplifier featuring a high slew rate of 90V/µs, a large bandwidth, a very low distortion and a very low curr ent and voltage noise. The gain can be set from -9dB to +30dB through a 4bit d igital word, with 3dB steps. The gain m onotonicity is guaranteed by design. Th e TS636 comes in SO-14 plastic packages . APPLICATION Input 2 3 4 5 Gain Contro l Logic Decoder 12 Output 2 11 Power Do wn 10 -Vcc 9 AGND 8 DGND +Vcc1 1 14 +Vcc2 D SO14 (Plastic Micropac.
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