QHX220 Ver la hoja de datos (PDF) - Intersil

Número de pieza

componentes Descripción

Fabricante

QHX220

Active Isolation Enhancer and Interference Canceller

Intersil 

Power ON/OFF Sequence

Power ON

Slope1: >1.8V/50ms

VDDA & VDDA2

0V

Power ON

1.8V

t1>0

ENBAR

Low

t2>250µs

BUS ENABLE

Low

QHx220

CLK

Low

DATA

Low

1

2

3

4

5

6

7

8

9

10 11 12 13 14 15 16 17 18 19 20 21 22 23 24

MSB

23

22

21

20

19

18

17

16

15

14

13

12

11

10

9

8

7

6

5

4

3

2

1

LSB

0

I-DAC

(10 bits: 0111111111)

Q-DAC

(10 bits: 0111111111)

(This command sets QHx220 into minimum gain (Note 8))

Freq. Range Gain Spare

(MTV: 00) (0) (0)

Power OFF

1.8V

VDDA & VDDA2

Power OFF

Slope2: >1.8V/50ms

0V

ENBAR

Low

BUS ENABLE

Low

CLK

Low

DATA

Low

NOTES:

8. When the chip is powered up its register are all zero. This means -135° phase and full analog gain, WLAN Application and 0dB

coarse gain (the boost gain mode is not enabled).

9. VDDA and VDDA2 should be connected on the PCB and decoupled with caps right next to the pin.

10. The SPI Bus is not accessible when VDDA/VDDA2 are <1V.

6

FN6986.0

October 20, 2009

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