TS652IDT Ver la hoja de datos (PDF) - STMicroelectronics

Número de pieza

componentes Descripción

Fabricante

TS652IDT

DIFFERENTIAL VARIABLE GAIN AMPLIFIER

STMicroelectronics 

TS652

DIGITAL INPUTS

Symbol

Parameter

Min.

Typ.

Max.

Unit

GC1, GC2, GC3 Low Level

and GC4

High Level

2

0

0.8

3.3

V

SIMPLIFIED SCHEMATIC

The TS652 consists of two independent channels.

Each channel has two stages. The first is a very low noise digitally controlled variable gain amplifier (range

0 to 18dB).

The TS652 features a high input impedance and a low noise current. To minimize the overall noise figure,

the source impedance must be less than 3kΩ.

This value gives an equal contribution of voltage and current noises.

The second stage is a gain/attenuation stage (+12dB to -9dB) featuring a low output impedance.

This output stage can drive loads as low as 500Ω.

Input1

+

_

v

v

v

_

+

Ouput1

+Vcc1

-Vcc

Analog GND

(AGND)

Input2

+

+

_

_

vv

GAIN CONTROL

LOGIC DECODER

POWER DOWN MODE POSITION

Ouput2

+Vcc2

GC1

GC2

GC3

GC4

Digital GND

(DGND)

+Vcc

Input

+Vcc

Power Down

Output

-Vcc

-Vcc

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