ISL5416KI Intersil, ISL5416KI Datasheet - Page 11

• Manufacturer Part Number: ISL5416KI
• Description: Up/Down Conv Mixer 1.8V 256-Pin BGA
• Manufacturer: Intersil

Specifications of ISL5416KI

• Package: 256BGA
• Operating Supply Voltage: 1.8 V

µPMANT
NCO/Mixer
After the input select/format section, the samples are
multiplied by quadrature sine wave samples from the carrier
NCO. The NCO has a 32-bit frequency control, providing
sub-hertz resolution at the maximum clock rate. The
quadrature sinusoids have exceptional purity. The purity of
the NCO should not be the determining factor for the
receiver dynamic range performance (A typical spectrum
plot is shown in Figure 20). The phase quantization to the
sine/cosine generator is 24 bits and the amplitude
quantization is 19 bits.
AMANT
BMANT
CMANT
DMANT
(TEST INPUT)
COFSYNC
ENµP
EXPµP
ENA
ENB
ENC
END
EXPA
EXPB
EXPC
EXPD
COF
NOTE:
BUS NUMBERING SUCH AS 0...-23 INDICATES BIT WEIGHTS
SUCH AS 2
ENCOF
0
... 2
-23
OFFSET
SERIAL
FREQ
R
E
G
R
E
G
R
E
G
R
E
G
MAX EXP
R
E
G
R
E
G
0...-15
11
CENTER
FREQ
SIN/COS
REG
REG
REG
REG
REG
GEN
REG
C
L
I
P
0...-18
0...-23
0...-23
PHASE
OFFSET
FIGURE 3. NCO, MIXER AND CIC BLOCK DIAGRAM
REG
R
E
G
R
G
R
G
E
E
R
E
G
R
E
G
R
E
G
R
E
G
R
G
R
G
E
E
BASE
SHIFT
VALUE
(from uP)
ISL5416
R
E
G
DECIMATION
CIC ORDER
69b
COUNTER
0...-23
The carrier NCO center frequency is loaded via the uP bus. The
center frequency control is double buffered -- the input is loaded
into a holding register via the uP interface. The data is then
transferred from the holding register to the active register by a
write to a special address or by a SYNCInX signal, if enabled in
IWA = *000h. To synchronize multiple channels, the carrier
NCO phase accumulator feedback can be zeroed on loading to
restart all of the NCOs at the same phase (see IWA = *005h).
The phase of the NCO can be offset by programming IWA =
*003h. The phase offset is not double buffered.
1
2
3
4
5
62b
53b
R
G
E
1
44b
1
34b
-5
1
FIR COEFFICIENTS
-4
1
0...-29
10
-3
1
FILTER
(COMB)
-2
6
FIR
R
E
G
-10
-1
G
R
E
3
R
E
G
R
E
G
R
E
G
-4
1
0...-23
R
E
G
-1
5
1
R
G
E
-1