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PDF TS652ID Data sheet ( Hoja de datos )
| Número de pieza | TS652ID | |
| Descripción | DIFFERENTIAL VARIABLE GAIN AMPLIFIER | |
| Fabricantes | STMicroelectronics | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de TS652ID (archivo pdf) en la parte inferior de esta página. Total 9 Páginas | ||
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TS652
DIFFERENTIAL VARIABLE GAIN AMPLIFIER
s LOW NOISE : 4.6nV/√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
ct(sDESCRIPTION
roduThe TS652 is a differential digitally controled vari-
able gain amplifier featuring a high slew rate of
P90V/µs, a large bandwidth, a very low distortion
teand a very low current and voltage noise.
leThe gain can be set from -9dB to +30dB through a
so4bit digital word, with 3dB steps.
bThe gain monotonicity is guaranteed by design.
- OThis device is particularly intended for applications
t(s)such as preamplification in telecommunication
systems using multiple carriers.
ducAPPLICATION
Pros Preamplifier and automatic gain control for
Assymetric Digital Subscriber Line (ADSL).
leteORDER CODE
ObsoPart Number Temperature Range
Package
D
D
SO-14
(Plastic Micropackage)
PIN CONNECTIONS (top view)
+Vcc1 1
Input 1 2
Input 2 3
LSB GC1 4
GC2 5
GC3 6
14 +Vcc2
13 Output 1
12 Output 2
11 Power Down
10 -Vcc
9 AGND
TS652ID
-40, +85°C
•
7
MSB GC4
8 DGND
D = Small Outline Package (SO) - also available in Tape & Reel (DT)
October 2001
1/9
1 page  
TS652
BANDWIDTH
The small signal bandwidth is almost constant for gains between +18dB to 0dB and is in the order of
52MHz to 70MHz respectively. For 30dB gain the bandwidth is around 18MHz.
The power bandwidth is typically equal to 30MHz for 2V peak to peak signals.
MAXIMUM INPUT LEVEL
The input level must not exceed the following values :
negative peak value: must be greater than -VCC + 1.5V
positive peak value: must be less than +VCC - 1.5V
For example, if a ±6V power supply is used, the input signal can swing between -4.5V and +4.5V.
These values are due to common mode input range limitations of the input stage of the first amplifier.
Some other limitations may occur, due to the slew rate of the first operational amplifier (typically in the or-
der of 300V/µs). This means that the maximum input signal decreases at high frequency.
t(s)SINGLE SUPPLY OPERATION
cThe incoming signal is AC coupled to the inputs.
duThe TS652 can be used either with a dual or a single supply. If a single supply is used, the inputs are bi-
roased to the mid supply voltage (+VCC/2). This bias network must be carefully designed, in order to reject
Pany noise present on the supply rail.
teThe AGND pin (9) must be connected to +VCC/2. The bias current of the second stage (inverting structure)
leis 8µA for both amplifiers. A resistor divider structure can be used. Two resistances should be chosen by
oconsidering 8µA as the 1% of the total current through these resistances. For a single +12V supply volt-
sage, two resistances of 7.5kΩ can be used. The differential input consists of a high pass circuit, formed by
bthe 1µF capacitor and a 1kΩ resistance and gives a break frequency of 160Hz.
) - OSINGLE +12V SUPPLY OF THE TS652
roduct(s1µF
PIN+
Obsolete1k
12V
47k
10nF 100nF
+Vcc1 1
TS652
Input 1 2
Input 2 3
14 +Vcc2
13 Output 1 10nF
12 Output 2
12V
100nF 10µF
1k 47k
10nF
1µF
GC1 4
11 Power Down
12V
IN-
1µF
GC2 5
GC3 6
GC4 7
10 -Vcc
9 AGND
8 DGND
7.5k
10nF
7.5k
1µF
5/9
5 Page | ||
| Páginas | Total 9 Páginas | |
| PDF Descargar | [ Datasheet TS652ID.PDF ] | |
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