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| 型号： | HSP50216KIZ |
| 厂商： | Intersil |
| 文件页数： | 8/58页 |
| 文件大小： | 0K |
| 描述： | IC DOWNCONVERTER DGTL 4CH 196BGA |
| 标准包装： | 1 |
| 功能： | 降频器 |
| RF 型： | W-CDMA |
| 封装/外壳： | 196-LFBGA |
| 包装： | 托盘 |
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HSP50216
The parallel input busses are 16 bits wide. The input format
may be twos complement or offset binary format. A floating
point mode is also supported. The floating point modes and
the mapping of the parallel 16-bit input format is discussed
below.
Floating Point Input Mode Bit Mapping
The input bit weighting for fixed point inputs on busses A, B,
C, and D is:
Floating Point Input Mode Bit Mapping Tables
A(15:0), B(15:0), C(15:0) or D(15:0):
bit 15 (MSB): 2 0 , bit 14: 2 -1 , bit 13: 2 -2 , ..., bit 0: 2 -15 .
For floating point modes, the least significant 2 or 3 bits are
used as exponent bits (See Floating Point Input Mode Bit
Mapping Tables). The difference between the four floating
point modes with three exponent bits is where the exponent
saturates.
15
2 0
14
2 -1
13
2 -2
12
2 -3
11
2 -4
10
2 -5
9
2 -6
8
2 -7
7
2 -8
6
2 -9
5
2 -10
4
2 -11
3
2 -12
2
2 -13 /(exp2)
1
(exp1)
0
(exp0)
11-BIT MODE: 11 to 13-BIT MANTISSA, 3-BIT EXPONENT, 30dB EXPONENT RANGE
EXPONENT
GAIN (dB)
PIN BIT WEIGHTING TO 16-BIT INPUT MAPPING
000
001
010
011
100
101 (Note 1)
0
6
12
18
24
30
X15
X15
X15
X15
X15
X15
X15
X15
X15
X15
X15
X14
X15
X15
X15
X15
X14
X13
X15
X15
X15
X14
X13
X12
X15
X15
X14
X13
X12
X11
X15
X14
X13
X12
X11
X10
X14
X13
X12
X11
X10
X9
X13
X12
X11
X10
X9
X8
X12
X11
X10
X9
X8
X7
X11
X10
X9
X8
X7
X6
X10
X9
X8
X7
X6
X5
X9
X8
X7
X6
X5
X4
X8
X7
X6
X5
X4
X3
X7
X6
X5
X4
X3
0
X6
X5
X4
X3
0
0
X5
X4
X3
0
0
0
NOTES:
1. Or 110 or 111, the exponent input saturates at 10.
2. “Xnn” = input A, B, C, or D bit nn.
12-BIT MODE: 12 to 13-BIT MANTISSA, 3-BIT EXPONENT, 24dB EXPONENT RANGE
EXPONENT
GAIN (dB)
PIN BIT WEIGHTING TO 16-BIT INPUT MAPPING
000
001
010
011
100 (Note 3)
0
6
12
18
24
X15
X15
X15
X15
X15
X15
X15
X15
X15
X14
X15
X15
X15
X14
X13
X15
X15
X14
X13
X12
X15
X14
X13
X12
X11
X14
X13
X12
X11
X10
X13
X12
X11
X10
X9
X12
X11
X10
X9
X8
X11
X10
X9
X8
X7
X10
X9
X8
X7
X6
X9
X8
X7
X6
X5
X8
X7
X6
X5
X4
X7
X6
X5
X4
X3
X6
X5
X4
X3
0
X5
X4
X3
0
0
X4
X3
0
0
0
NOTE:
3. Or 101, 110, or 111, the exponent input saturates at 100.
13-BIT MODE: 13-BIT MANTISSA, 3-BIT EXPONENT, 18dB EXPONENT RANGE
EXPONENT
GAIN (dB)
PIN BIT WEIGHTING TO 16-BIT INPUT MAPPING
000
001
010
011 (Note 4)
0
6
12
18
X15
X15
X15
X15
X15
X15
X15
X14
X15
X15
X14
X13
X15
X14
X13
X12
X14
X13
X12
X11
X13
X12
X11
X10
X12
X11
X10
X9
X11
X10
X9
X8
X10
X9
X8
X7
X9
X8
X7
X6
X8
X7
X6
X5
X7
X6
X5
X4
X6
X5
X4
X3
X5
X4
X3
0
X4
X3
0
0
X3
0
0
0
NOTE:
4. Or 100, 101, 110, or 111, the exponent input saturates at 011.
8
FN4557.6
August 17, 2007
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