TDA9901 datasheet(2/20 Pages) PHILIPS

2 / 20 page

1999 Oct 08

Philips Semiconductors

Product speciﬁcation

Wideband differential digital controlled

variable gain ampliﬁer

TDA9901

FEATURES

• 130 MHz, −3 dB small signal bandwidth

• Digitally controlled gain

• TTL/CMOS compatible digital inputs (3.3 or 5 V)

• TTL single ended or differential clock input with PECL

compatibility

• 24 dB gain control range

• Five steps of 6 dB plus 6 dB fixed gain

• 30 dB gain maximum

• High impedance differential inputs

• Low impedance differential outputs

• High power supply rejection

• 125 nV/√Hz output voltage noise density at 30 dB gain

• Fast gain settling

• Dual control modes: transparent or latched.

APPLICATIONS

• Linear AGC systems

• IF amplifier in IF conversion systems (e.g. base stations

or satellite receivers)

• Instrumentation

• Multi-purpose amplifier

• Driver for differential ADCs (e.g. TDA8768).

GENERAL DESCRIPTION

The TDA9901 is a wideband, low noise amplifier with

differential inputs and outputs. The TDA9901 incorporates

an AGC function with digital control. The TDA9901 is

optimized for fast switching between different gain

settings, preserving small phase and amplitude error.

The TDA9901 presents an excellent combination of low

noise and good linearity for a wide input frequency range.

The TDA9901 is optimized for processing IF signals in

GSM base stations. It is also suited for many other

applications as a general purpose digitally controlled

variable gain amplifier.

The TDA9901 is able to operate from 4.75 to 5.25 V

supply for the analog part and from 3.0 to 5.25 V for the

digital part.

QUICK REFERENCE DATA

ORDERING INFORMATION

SYMBOL

PARAMETER

CONDITIONS

MIN.

TYP.

MAX.

UNIT

VDDA

analog supply voltage

4.75

5.0

5.25

VDDD

digital supply voltage

3.0

3.3

5.25

IDDA

analog supply current

−

IDDD

digital supply current

−

3.0

5.0

Gdif

differential gain

minimum gain

5.7

6.11

6.46

maximum gain

29.3

30.5

31.5

B−3dB

−3 dB small signal bandwidth

Vo(dif)(p-p) = 0.125 V;

Tamb =25 °C

110

130

−

MHz

Ptot

total power dissipation

−

160

216

TYPE

NUMBER

PACKAGE

NAME

DESCRIPTION

VERSION

TDA9901TS

SSOP20

plastic shrink small outline package; 20 leads; body width 4.4 mm

SOT266-1

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