HSP50214 Ver la hoja de datos (PDF) - Intersil

Número de pieza

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HSP50214

Programmable Downconverter

Intersil 

HSP50214

fS

5MHz

2fS

10MHz

3fS

15MHz

4fS

20MHz

5fS

25MHz

6fS

30MHz

7fS

8fS

35MHz 40MHz

THE INPUT DATA SPECTRUM SAMPLED AT RATE R = fS

9fS

45MHz

10fS

50MHz

f’S / 8

5MHz

f’s/4

10MHz

3f’S /8

15MHz

f’S /2

5f’S /8

20MHz 25MHz

3f’S /4

30MHz

7f’S /8

f’S

35MHz 40MHz

FIGURE 6. INTERPOLATION SPECTRUM: INTERPOLATE BY 8 THE INPUT DATA WITH ZERO STUFFING; SAMPLE AT RATE R = f’S

4MHz 8MHz 12MHz 16MHz 20MHz 24MHz 28MHz 32MHz 36MHz 40MHz

DECIMATE BY 10 AND CIC FILTER; SAMPLE AT RATE R = f’S/10

85dB DYNAMIC RANGE BANDWIDTH

CIC FILTER ALIAS PROFILE

CIC FILTER

FREQUENCY

RESPONSE

O.5MHz 1MHz

2MHz

3MHz

4MHz

FIGURE 7. ALIAS PROFILE AND THE 85dB DYNAMIC RANGE BANDWIDTH

µPROC

DAC

INPUT LEVEL

DETECTOR (24-BIT

ERROR VALUE)

IF

INPUT

GCA

THRESH

A/D

PDC

FIGURE 8. PROCESSOR BASED EXTERNAL IF AGC

IN(13:0)

INPUT

GATING

LOGIC

INPUT_THRESHOLD †

INTEGRATION_INTERVAL†

|X|

+

R

E

G

“0”

16

ACCUMULATOR

32

+

R

E

CLKIN

G

ADDR(2:0)

R

24

M

TO

E

U 8 µPROC

G

X

START †

INTEGRATION_MODE †

COUNTER

CLKIN

† Controlled via microprocessor interface. CONTINUOUS

SINGLE

FIGURE 9.

10

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