ST TS652 User Manual

查询TS652供应商

■ LOW NOISE : 4.6nV/√Hz

■ LOW DISTORTION

■ HIGH SLEW RATE : 90V/µs

■ WIDE BANDWIDTH : 52MHz @ -3dB &

18dB gain

TS652

DIFFERENTIAL VARIABLE GAIN AMPLIFIER

■ GAIN PROGRAMMABLE from -9dB to

+30dB with 3dB STEPS

■ POWER DOWN FUNCTION

DESCRIPTION

The TS652 is a differential digitally controled 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 gaincan be setfrom -9dB to +30dB through a
4bit digital word, with 3dB steps.

The gain monotonicity is guaranteed by design.
This device is particularly intended for applications

such as preamplification in telecommunication
systems using multiple carriers.

APPLICATION

■ Preamplifier and automatic gain control for

Assymetric Digital Subscriber Line (ADSL).

ORDER CODE

Package

Part Number Temperature Range

D

TS652ID -40, +85°C •

D

SO-14

(Plastic Micropackage)

PIN CONNECTIONS (top view)

1

+Vcc1

Input1

2

3

Input 2

4

GC1

5

GC2

6

GC3

Gain Control

Logic Decoder

7

GC4

14

+Vcc2

13

Output 1

Output 2

12

11

Pow erDow n

10

-Vcc

9

AGND

8

DGN D

D=Small Outline Package (SO) - also available in Tape & Reel (DT)

May 2000

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TS652

ABSOLUTE MAXIMUM RATINGS

Symbol Parameter Value Unit

V

T

T

R

Supply voltage

CC

V

Input Voltage

i

Operating Free Air Temperature Range TS652ID -40 to + 85 °C

oper

Storage Temperature -65 to +150 °C

std

T

Maximum Junction Temperature 150 °C

j

Thermal Resistance Junction to Case 15 °C/W

thjc

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

OPERATING CONDITIONS

Symbol Parameter Value Unit

V

V

Supply Voltage 5 to 12 V

CC

Common Mode Input Voltage

icm

1)

2)

+0.3V.

CC

14 V

0to14 V

+ VCC/2

V

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TS652

ELECTRICAL CHARACTERISTICS. VCC= ±6Volts, T

=25°C (unless otherwise specified).

amb

Symbol Parameter Test Condition Min. Typ. Max Unit

DC PERFORMANCE

V

Voltage on the Input Pin 0 V

i

I

TotalSupply Current

CC

∆V

I

ccpdw

Power Down Total Consumption Power Down Mode 150 µA
Differential Input Offset Voltage

OFFSET

SVR Supply Voltage Rejection Ratio

No load, V

V

=0,AV= 30dB

in

= 0dB

A

V

out

=0

28 mA

6mV

50 80 dB

AC PERFORMANCE

Z

Input Impedance 100kΩ//5pF

in

Z

V

V

P

A

A

R

Power Down Output Impedance Power Down Mode 100kΩ 150kΩ//5pF

out

High Level Output Voltage

OH

R

connected to GND

L

Low Level Output Voltage

OL

R

connected to GND

L

Voltage Gain F= 1MHz

A

V

Gain monotonicity guaranteed by design
Precision of the Voltage Gain F= 1MHz -1 1 dB

AV

Step Value F= 1MHz 2.4 3 3.6 dB

vstep

Gain Mismatch between Both

vmin

Channels

Bandwidth @ -3dB

R

B

w

Bandwidth Roll-off

bw

Bandwidth @ -3dB

I

o

R

L

= 500Ω

L

= 15pF

C

L

= 500Ω,CL= 15pF

SR Slew Rate (gain independent)

= 500Ω

R

L

R

L

= 500Ω

4 4.5 V

-4.5 -4 V

-9 30 dB

F= 1MHz 1 dB

= -9dB

A

V

= 0dB

A

V

= +18dB

A

V

= +30dB

A

V

A

= +30dB, F = 1MHz

V

55 110 200
32 69 132
26 52 100
10 18 36

0.08 dB
|Source| 17 28
Sink 17 22

= 2Vpeak

V

o

50 100 V/µs

NOISE AND DISTORTION

in Equivalent Input Noise Current F = 100kHz 1.5 pA/√Hz

en Equivalent Input Noise Voltage

THD30 Harmonic Distorsion

Third Order Intermodulation

IM3

Product
F1 = 180kHz, F2 = 280kHz

Third Order Intermodulation

IM3

Product
F1 = 70kHz, F2 = 80kHz

F = 100kHz
A

= 30dB

V

1Vpeak, F = 150kHz,

= +30dB, RL= 500Ω//15pF

A

V

H2 -70
H3 -93
H4 -98
H5 -99

V

= 1Vpeak, AV= +30dB

out

= 500Ω//15pF

R

L

@ 80kHz -77
@ 380kHz -85
@640kHz -86
@740kHz -87

V

= 1Vpeak, AV= +30dB

out

= 500Ω//15pF

R

L

@ 60kHz -77
@ 90kHz -79
@220kHz -83
@230kHz -84

4.6 nV/√Hz

MHz

mA

dBc

dBc

dBc

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