Philips TDA9901TS-C1 Datasheet

DATA SH EET

Product specification
Supersedes data of 1998 Apr 15
File under Integrated Circuits, IC02

1999 Oct 08

INTEGRATED CIRCUITS

TDA9901

Wideband differential digital
controlled variable gain amplifier

1999 Oct 08 2

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 amplifierin 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 andoutputs. TheTDA9901 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

V

DDA

analog supply voltage 4.75 5.0 5.25 V

V

DDD

digital supply voltage 3.0 3.3 5.25 V

I

DDA

analog supply current − 30 36 mA

I

DDD

digital supply current − 3.0 5.0 mA

G

dif

differential gain minimum gain 5.7 6.11 6.46 dB

maximum gain 29.3 30.5 31.5 dB

B

−3dB

−3 dB small signal bandwidth V

o(dif)(p-p)

= 0.125 V;

T

amb

=25°C

110 130 − MHz

P

tot

total power dissipation − 160 216 mW

TYPE

NUMBER

PACKAGE

NAME DESCRIPTION VERSION

TDA9901TS SSOP20 plastic shrink small outline package; 20 leads; body width 4.4 mm SOT266-1

1999 Oct 08 3

Philips Semiconductors Product specification

Wideband differential digital controlled
variable gain amplifier

TDA9901

BLOCK DIAGRAM

Fig.1 Block diagram.

handbook, full pagewidth

MGM962

REFERENCE
GENERATOR

REFERENCE
GENERATOR

LATCHES

DECODER

GRAY2

19

GRAY1

20

V

SSD

17

V

SSA

12

165

7

6

14

15

n.c.

0, 6, 12, 18 or 24 dB

6 dB

8, 9, 10, 13

V

DDA

11

GRAY0

1

TE

2

V

DDD

18

CLK3CLKN

4

CMVGA

IN

INN

OUT
OUTN

CMADC

TDA9901

1999 Oct 08 4

Philips Semiconductors Product specification

Wideband differential digital controlled
variable gain amplifier

TDA9901

PINNING

SYMBOL PIN DESCRIPTION

GRAY0 1 digital control signal bit 0 input

(LSB)
TE 2 transparent enable input
CLK 3 clock input for gain control setting
CLKN 4 inverting clock input for gain

control setting (active low)
CMVGA 5 regulator output common mode

VGA input
IN 6 non-inverting analog input
INN 7 inverting analog input (active low)
n.c. 8 not connected
n.c. 9 not connected
n.c. 10 not connected
V

DDA

11 analog supply voltage

V

SSA

12 analog ground
n.c. 13 not connected
OUTN 14 inverting analog output (active low)
OUT 15 non-inverting analog output
CMADC 16 regulator output common mode

ADC input

V

SSD

17 digital ground
V

DDD

18 digital supply voltage
GRAY2 19 digital control signal bit 2 input

(MSB)

GRAY1 20 digital control signal bit 1 input

handbook, halfpage

GRAY0

TE

CLK

CLKN

CMVGA

IN

INN

n.c.
n.c.
n.c.

GRAY1
GRAY2

V

DDD

V

SSD

OUT
OUTN

CMADC

n.c.
V

SSA

V

DDA

1
2
3
4
5
6
7
8
9

10

11

12

20
19
18
17
16
15
14
13

TDA9901TS

MGM963

Fig.2 Pin configuration.

FUNCTIONAL DESCRIPTION

The TDA9901 provides a digitally controlled variable gain function for high-frequency applications.
The TDA9901 can beoperated in two different modes, depending onthe value at pin TE. When TE is at logic 1, the gain

can be instantly controlled when the clock signal is HIGH (transparent mode). The gain is fixed during the LOW period
of the clock. When TE is at logic 0 the gain of the TDA9901 is changed at the rising edge of the clock signal.

1999 Oct 08 5

Philips Semiconductors Product specification

Wideband differential digital controlled
variable gain amplifier

TDA9901

LIMITING VALUES

In accordance with the Absolute Maximum Rating System (IEC 134).

HANDLING

Inputs and outputs are protected against electrostatic discharges in normal handling. However, to be totally safe, it is
desirable to take normal precautions appropriate to handling integrated circuits.

THERMAL CHARACTERISTICS

CHARACTERISTICS

V

DDA=V11

to V12= 4.75 to 5.25 V; V

DDD=V18

to V17= 3.0 to 5.25 V; V

SSA

and V

SSD

shorted together;

T

amb

= −40 to +85 °C; typical values measured at V

DDA

= 5.0 V; V

DDD

= 3.3 V and T

amb

=25°C; unless otherwise

specified; note 1.

SYMBOL PARAMETER MIN. MAX. UNIT

V

DDA

analog supply voltage −0.3 +7.0 V

V

DDD

digital supply voltage −0.3 +7.0 V

∆V

DD

supply voltage difference between V

DDA

and V

DDD

−1.0 +4.0 V

V

I

input voltage level −0.3 +7.0 V

I

O

output current − 10 mA

T

stg

storage temperature −55 +150 °C

T

amb

ambient temperature −40 +85 °C

T

j

junction temperature − 150 °C

SYMBOL PARAMETER CONDITIONS VALUE UNIT

R

th(j-a)

thermal resistance from junction to ambient in free air 120 K/W

SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT

Supplies

V

DDA

analog supply voltage 4.75 5.0 5.25 V

V

DDD

digital supply voltage 3.0 3.3 5.25 V

∆V

DD

voltage difference
between V

DDA

and V

DDD

−0.2 − +2.5 V

I

DDA

analog supply current − 30 36 mA

I

DDD

digital supply current − 3.0 5.0 mA

Variable gain amplifier transfer characteristics

B

−3dB

−3 dB small signal

bandwidth

V

o(dif)(p-p)

= 0.125 V;

T

amb

=25°C

110 130 − MHz

t

d(g)

group delay time up to fi= 20 MHz;

minimum gain;
T

amb

=25°C

− 2.5 − ns

∆t

d(g)

group delay difference 6 dB gain step;

T

amb

=25°C

−−300 ps

1999 Oct 08 6

Philips Semiconductors Product specification

Wideband differential digital controlled
variable gain amplifier

TDA9901

t

st

settling time 10 to 90% maximum

output transition;
C

L(max)

= 5 pF on
each output;
T

amb

=25°C

−−3.6 ns

G

step

gain step size DC input

T

amb

=25°C 5.88 6.09 6.28 dB

all temperatures 5.6 6.09 6.56 dB

G

(min)

minimum gain setting DC input

T

amb

=25°C 5.76 6.11 6.40 dB

all temperatures 5.7 6.11 6.46 dB

G

(max)

maximum gain setting DC input

T

amb

=25°C 29.9 30.5 30.9 dB

all temperatures 29.3 30.5 31.5 dB

∆G/∆T gain stability as a function

of temperature

minimum gain −−1.0 − mdB/°C
maximum gain −−7.5 − mdB/°C

|∆G/∆VDD| gainstability as a function

of power supply

minimum gain − 15 25 mdB/V

∆V

i(offset)

input offset voltage
difference

6 dB gain step − 0.8 − mV

F noise figure R

s

= 100 Ω;

fi= 20 MHz

minimum gain − 29.1 − dB
maximum gain − 9.9 − dB

V

n(o)(eq)

equivalent output noise
voltage spectral density

Rs= 100 Ω;
fi= 20 MHz;
T

amb

=25°C
G=6dB − 75 − nV/√Hz
G = 12 dB − 82 − nV/√Hz
G = 18 dB − 97 − nV/√Hz
G = 24 dB − 91 − nV/√Hz
G = 30 dB − 124 − nV/√Hz

PSRR

(VDDA)

power supply ripple
rejection of V

DDA

minimum gain

0to20MHz − 57 − dB
20 to 100 MHz − 39 − dB

PSRR

(VDDD)

power supply ripple
rejection of V

DDD

minimum gain dB

0to20MHz − 67 − dB
20 to 100 MHz − 51 − dB

CMRR common mode rejection

ratio

0to20MHz − 75 − dB
20 to 150 MHz − 45 − dB

SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT