TDA9901TS Просмотр технического описания (PDF) - NXP Semiconductors.

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производитель

TDA9901TS

Wideband differential digital controlled variable gain amplifier

NXP Semiconductors. 

NXP Semiconductors

TDA9901

Wideband differential digital controlled variable gain amplifier

GRAY0

GRAY1

GRAY2

gain N

gain N + 1

LOW

50 %

HIGH

OUT

and

OUTN

ts

tPD

gain N

gain N + 1

Vo(max)

90 %

10 %

0.5 Vo(max)

0V

014aaa477

Fig 4. Transparent mode timing diagram with CLK HIGH

FILTER

sine wave

generator

100 Ω

CMVGA

5

OUT 47 nF

15

IN TDA9901TS

6

100 Ω

INN

7

100 nF

OUTN 47 nF

14

680 Ω

680 Ω

Vi

42

C1(1)

ADC1206S D0...11

055 (ADC)

Vi 43

C2(1)

36

CLK

dB

(2)

(3)

30 MHz

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(1) C1 and C2 represent the board line capacitance. They represent about 5 pF with the ADC1206S040/055/070 input

capacitance. Special care has to be taken to minimize this load in order to have the best dynamic performance.

(2) The α2H and α3H of the ADC1206S040/055/070 is lower than that measured on the TDA9901. This measurement method is

preferred to conventional methods due to its low contribution to the α2H.

(3) The chain measurement shows the harmonic distortion of the TDA9901 as the measurement from ADC1206S040/055/070 is

negligible.

Fig 5. Dynamic distortion measurement diagram

TDA9901_4

Product data sheet

Rev. 04 — 14 August 2008

© NXP B.V. 2008. All rights reserved.

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