TDA9901_4

© NXP B.V. 2008. All rights reserved.

Product data sheet

Rev. 04 — 14 August 2008

5 of 18

NXP Semiconductors

TDA9901

Wideband differential digital controlled variable gain amplifier

8.

Functional description

The TDA9901 provides a digitally controlled variable gain function for high-frequency

applications.

The TDA9901 can be operated in two different modes, depending on the 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.

9.

Limiting values

10. Thermal characteristics

18

digital supply voltage

GRAY2

19

digital control signal bit 2 input (Most Significant Bit (MSB))

GRAY1

20

digital control signal bit 1 input

Table 3.

Symbol

Pin

Description

Table 4.

Limiting values

In accordance with the Absolute Maximum Rating System (IEC 60134).

Symbol

Parameter

Conditions

Min

Max

Unit

analog supply voltage

−0.3

+7.0

V

digital supply voltage

−0.3

+7.0

V

supply voltage difference

−0.1

+4.0

V

input voltage

−0.3

+7.0

V

output current

-

10

mA

storage temperature

−55

+150

°C

ambient temperature

−40

+85

°C

junction temperature

-

150

°C

Table 5.

Thermal characteristics

Symbol

Parameter

Conditions

Value

Unit

thermal resistance from junction to

ambient

in free air

120

K/W