SGS Thomson Microelectronics TS636ID, TS636, TS636IDT Datasheet
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■ LOW NOISE : 4.7nV/√Hz
■ LOW DISTORTION
■ HIGH SLEW RATE : 90V/µs
■ WIDE BANDWIDTH : 52MHz @ -3dB &
18dB gain
■ GAIN PROGRAMM A BLE from -9dB to +30dB
with 3dB STEPS
■ POWER DOWN FUNCTION
DESCRIPTION
This TS636 is particularly intended for applications such as preamplification in telecommunication systems using m ultiple 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 con troled variable 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
■ Preamplifier with automatic gain control for
Asymmetric Digital Subscriber Line (ADSL).
ORDER CODE
D = Small Outline Package (SO) - also available in Tape & Reel (DT)
PIN CONNECTIONS (top view)
Part Number Temperature Range
Package
D
TS636I -40, +85°C
•
D
SO14
(Plastic Micropackage)
+Vcc2
Inpu t 1
Input 2
-Vcc
DGND
LSB
GC1
GC2
GC3
MSB GC4
Output 1
1
2
3
4
5
6
7
14
13
12
11
10
9
8
Output 2
AGND
Power Down
+Vcc1
Gain Control
Logic Dec oder
TS636
DIFFERENTIAL VARIABLE GAIN AMPLIFIER
FOR ADSL LINE INTERFACE
January 2001
TS636
2/9
ABSOLUTE MAXIMUM RATINGS
OPERATING CONDITIONS
APPLICATION: ADSL LINE INTERFACE
Symbol Parameter Value Unit
V
CC
Supply voltage
1)
14 V
V
i
Input Voltage
2)
0 to 14 V
T
oper
Operating Free Air Temperature Range TS636ID -40 to + 85 °C
T
std
Storage Temperature -65 to +150 °C
T
j
Maximum Junction Temperature 150 °C
R
thjc
Thermal Resistance Junction to Case 22 °C/W
R
thja
Thermal Resistance Junction to Ambiante Area 125 °C/W
Output Short Circuit Duration Infinite
1. All voltages values are with respect to network terminal.
2. The magnitude of input and output voltages must never exceed V
CC
+0.3V.
Symbol Parameter Value Unit
V
CC
Supply Voltage 5 to 12 V
V
icm
Common Mode Input Voltage
V
CC
/2
V
twisted-pair
telephone
line
HYBRID
CIRCUIT
LP filter
TS634 or TS635
Line Driver
reception
(analog signal)
emission
(analog
signal)
upstream
downstream
ST70135 ST70134
TS636
Receiver
VGA
ASCOT ADSL
CHIP-SET
Power Down
4-bit Gain Cont rol
TX
RX
TS636
3/9
ELECTRICAL CHARACTERISTICS. VCC = ±6Volts, T
amb
= 25°C (unless otherwise specified).
Symbol Parameter Test Condition Min. Typ. Max Unit
DC PERFORMANCE
I
ib
Input Bias Current (AGND pin) 8
µ
A
I
CC
Total Supply Current
No load, V
out
= 0
28 mA
∆
V
OFFSET
Differential Input Offset Voltage
V
in
= 0, AV = 30dB
6mV
SVR Supply Voltage Rejection Ratio
A
V
= 0dB
50 80 dB
POWER DOWN MODE
I
ccpdw
Power Down Total Consumption Power Down Mode 150
µ
A
Z
out
Power Down Output Impedance Power Down Mode 100kΩ150kΩ//5pF
AC PERFORMANCE
Z
in
Input Impedance 100kΩ//5pF
V
OH
High Level Output Voltage
R
L
connected to GND
R
L
= 500
Ω
4 4.5 V
V
OL
Low Level Output Voltage
R
L
connected to GND
R
L
= 500
Ω
-4.5 -4 V
A
V
Voltage Gain F= 1MHz
-9 30 dB
Gain monotonicity guaranteed by design
P
AV
Precision of the Voltage Gain F= 1MHz -1.4 1.4 dB
A
vstep
Step Value F= 1MHz 2.4 3 3.6 dB
A
vmis
Gain Mismatch between Both
Channels
F= 1MHz 1 dB
B
w
Bandwidth @ -3dB
R
L
= 500Ω, CL = 15pF
A
V
= -9dB
45 100 MHz
A
V
= +30dB
917 MHz
R
bw
Bandwidth Roll-off
A
V
= +30dB, F = 1MHz
0.08 dB
I
o
Bandwidth @ -3dB
R
L
= 500Ω, CL = 15pF
|Source| 17 28
mA
Sink 17 22
SR Slew Rate (gain independent)
V
o
= 2Vpeak
40 90 V/µs
NOISE AND DISTORTION
in Equivalent Input Noise Current F = 100kHz 1.6 pA/√Hz
en Equivalent Input Noise Voltage
F = 100kHz
A
V
= 30dB
4.7 nV/√Hz
THD30 Harmonic Distorsion
1Vpeak, F = 150kHz,
A
V
= +30dB, RL = 500Ω//15pF
dBc
H2 -70
H3 -93
H4 -98
H5 -99
IM3_1
Third Order Intermodulation
Product
F1 = 180kHz, F2 = 280kHz
V
out
= 1Vpeak, AV = +30dB
R
L
= 500Ω//15pF
dBc
@ 80kHz -77
@ 380kHz -85
@640kHz -86
@740kHz -87
IM3_2
Third Order Intermodulation
Product
F1 = 70kHz, F2 = 80kHz
V
out
= 1Vpeak, AV = +30dB
R
L
= 500Ω//15pF
dBc
@ 60kHz -77
@ 90kHz -79
@220kHz -83
@230kHz -84
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