TS634ID STMicroelectronics, TS634ID Datasheet - Page 4

• Manufacturer Part Number: TS634ID
• Description: Dual Wide Band Operational Amplifier Adsl Line Interface
• Manufacturer: STMicroelectronics

TS634
POWER DOWN MODE
V
POWER DOWN EQUIVALENT SCHEMATIC
OUPUT IMPEDANCE IN POWER DOWN MODE
In Power Down Mode the output of the driver is in
"high impedance" state. It is really the case for the
static mode. Regarding the dynamic mode, the im-
pedance decreases due to a capacitive effect of
the collector-substrat and base collector junction.
The impedance behaviour comes capacitive, typi-
cally: 1.4M
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 sup-
plied by a symmetric 6V and is loaded with 25 .
Two synthesizers (Rhode & Schwartz SME) gen-
erate two frequencies (tones) (70 & 80kHz or 180
& 280kHz). An HP3585 spectrum analyzer mea-
sures the spurious level at different frequencies.
The curves are traced for different output levels
(the value in the X axis 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.
4/9
Symbol
CC
Icc
V
R
C
pdw
= ±6Volts, T
pdw
pdw
pdw
operator 1
V
V
Thershold Voltage for Power Down Mode
Total Power Down Mode Current Consumption
Power Down Mode Ouput Impedance
Power Down Mode Output Capacitance
V
V
high level
high level
low level
low level
// 33pF.
V
V
cc
+
_
STANDBY CONTROL
amb
cc
+
-
. .
= 25°C
. .
.
POWER
DOWN
Parameter
operator 2
Ouput
V
V
V
V
high level
high level
low level
low level
3rd ORDER INTERMODULATION
2 tones : 70kHz and 80kHz
2 tones : 180kHz and 280kHz
High Level
Low Level
-100
-10
-20
-30
-40
-50
-60
-70
-80
-90
-100
0
-10
-20
-30
-40
-50
-60
-70
-80
-90
operator 1
0
1
Standby
Standby
Active
Active
230kHz
1
1,5
1,5
90kHz
OPERATOR STATUS
80kHz
Min.
2
2
2
380kHz
60kHz
Vout peak (V)
2,5
Vout peak (V)
2,5
220kHz
Typ.
1.4
3.3
33
0
640kHz
3
3
740kHz
operator 2
Standby
Standby
Active
Active
3,5
Max
150
0.8
3,5
4
4
Unit
µA
pF
V
4,5
4,5