ISL5217KI Intersil, ISL5217KI Datasheet - Page 28

• Manufacturer Part Number: ISL5217KI
• Description: Up/Down Conv Mixer 2.5V 196-Pin BGA
• Manufacturer: Intersil

Specifications of ISL5217KI

• Package: 196BGA
• Maximum Power Dissipation: 1970 mW
• Operating Supply Voltage: 2.5 V

NOTE: Writing to the I channel input generates the update strobe to move the data into the IQ FIFO. Normal write order is Q then I.
NOTE: Writing to the LSW generates the update strobe to load the slave configuration reg when in the immediate mode
NOTE: Writing to the LSW generates the update strobe to load the slave configuration reg when in the immediate mode.
15:0
15:0
15:0
15:0
15:0
15:0
15:0
BIT
BIT
BIT
BIT
BIT
BIT
BIT
I Channel QASK Input or
FM Input
Fixed Integer Divider
Fixed Integer Divider
Sample Rate NCO
Sample Rate NCO
Q Channel Input
Sample Rate NCO
FUNCTION
FUNCTION
FUNCTION
FUNCTION
FUNCTION
FUNCTION
FUNCTION
28
I(15:0). In QASK mode, this is the I input vector. The format is 2’s complement. The MSB is bit 15. The
mixer operation is:
OUT = (I*COS) - (Q*SIN).
In FM mode, this is interpreted as an offset frequency to the center frequency. The modulation index
depends on the mode and the filter coefficients. In FM with post filter mode, the phase change per input
sample can range from -180 to 180 degrees, so the deviation is limited to ±(input sample rate)/2.
Q(15:0). In QASK mode, this is the Q input vector. See address 0 above. In FM mode, this input is not
FID(15:0) is loaded in this address. The fixed integer divider is a 32 bit counter clocked at the output clock
used.
FID(31:16) is loaded in this address. See Address 3.
rate. The carryout is used to clear the fine and /or coarse phase of the sample rate NCO. Allows fixed
integer sample rates. The fixed integer divider is computed by the formula:
FID (31:0) = INT [fCLK/ fCO]
SF(47:32) is loaded in this address. See Address 6.
SF(31:16) is loaded in this address. See Address 6.
SF(15:0) is loaded in this address. The sample rate is controlled by a 48-bit NCO clocked at the output
clock rate. The sample rate is computed by the formula:
SF (47:0) = INT [(f s / f CLK ) * 2 48
TYPE: SINGLE CHANNEL DIRECT, ADDRESS: 0x00
TYPE: SINGLE CHANNEL DIRECT, ADDRESS: 0x01
TYPE: SINGLE CHANNEL DIRECT, ADDRESS: 0x02
TYPE: SINGLE CHANNEL DIRECT, ADDRESS: 0x03
TYPE: SINGLE CHANNEL DIRECT, ADDRESS: 0x04
TYPE: SINGLE CHANNEL DIRECT, ADDRESS: 0x05
TYPE: SINGLE CHANNEL DIRECT, ADDRESS: 0x06
TABLE 20. SAMPLE FREQUENCY (47:32) MSW
TABLE 22. SAMPLE FREQUENCY (15:0) LSW
TABLE 16. I CHANNEL INPUT OR FM (15:0)
TABLE 18. FIXED INTEGER DIVIDER, MSW
TABLE 19. FIXED INTEGER DIVIDER, LSW
TABLE 21. SAMPLE FREQUENCY (31:16)
TABLE 17. Q CHANNEL INPUT (15:0)
ISL5217
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DESCRIPTION
DESCRIPTION
DESCRIPTION
DESCRIPTION
DESCRIPTION
DESCRIPTION
DESCRIPTION
July 8, 2005
FN6004.3