參數(shù)資料
型號(hào)： ISL5216KI
廠商： INTERSIL CORP
元件分類： 無繩電話/電話
英文描述： Four-Channel Programmable Digital DownConverter
中文描述： TELECOM, CELLULAR, BASEBAND CIRCUIT, PBGA196
封裝： 12 X 12 MM, 0.80 MM PITCH, PLASTIC, BGA-196
文件頁數(shù)： 10/65頁
文件大?。?/td> 1384K
代理商： ISL5216KI
10
Level Detector
An input level detector is provided to monitor the signal level
on any of the input busses. The input bus, input format, and
the level detection type are programmable (see
Microprocessor Interface
section, GWA registers F804h,
F805h and F806h). This signal level represents the wideband
signal from the A/D and is useful for controlling gain /
attenuation blocks ahead of the converter.
The supported monitoring modes are: integrated magnitude
(like the HSP50214 w/o the threshold), leaky integration
(Y
n
= X
n
x A + Y
n-1
x (1-A)) where A = 1, 2
(see GWA = F805h), and peak detection. The measurement
interval can be programmed from 2 to 65537 samples (or
continuous for the leaky integrator and peak detect cases).
The output is 32 bits and is read via the
-8
, 2
-12
, or 2
-16
μ
P interface.
Note that the accumulators in the input level detector are 32
bits wide. This may limit the integration range to as few as
512 samples (for a 42dB exponent range).
Complex Input Mode
In this mode, complex (I/Q) data can be input using two clock
cycles with I input first and Q input second. The ENIx signal
indicates the clock cycle when I is valid. The Q data is taken
on either the next input clock or two clocks after I, as
determined by IWA *000H bit 23. The complex multiply is
done in two clock cycles: I * COS and I * SIN on the first
15-BIT MODE: 15-BIT MANTISSA (15:1), 2-BIT EXPONENT (-1, 0), 18dB MAXIMUM EXPONENT RANGE (Note 12)
EXPONENT
GAIN (dB)
PIN BIT WEIGHTING TO 16-BIT INPUT MAPPING
000
0
X15
X14
X13
X12
X11
X10
X9
X8
X7
X6
X5
X4
X3
X2
X1
0
001
6
X15
X14
X13
X12
X11
X10
X9
X8
X7
X6
X5
X4
X3
X2
X1
0
010
12
X15
X14
X13
X12
X11
X10
X9
X8
X7
X6
X5
X4
X3
X2
X1
0
011
18
X15
X14
X13
X12
X11
X10
X9
X8
X7
X6
X5
X4
X3
X2
X1
0
NOTE:
12. To select this mode, set IWA *000H / GWA F804H bits 17, 16, 8 and 7 to 1, 1, 0 and 0 respectively.
16-BIT MODE: 16-BIT MANTISSA (15:0), 1-BIT EXPONENT (-1), 6dB MAXIMUM EXPONENT RANGE (Note 13)
EXPONENT
GAIN (dB)
PIN BIT WEIGHTING TO 16-BIT INPUT MAPPING
X(-1) = 0
0
X15
X14
X13
X12
X11
X10
X9
X8
X7
X6
X5
X4
X3
X2
X1
X0
X(-1) = 1
6
X15
X14
X13
X12
X11
X10
X9
X8
X7
X6
X5
X4
X3
X2
X1
X0
NOTE:
13. To select this mode, set IWA *000H / GWA F804H bits 17, 16, 8 and 7 to 1, 1, 0 and 1 respectively.
FIGURE 1. INTEGRATED MODE
ABSOLUTE
VALUE
16
2
0, -8, -12, -16
32
MSB
A
B
B
Σ
R
E
G
A
B
A > B
32
2
0, -8, -12, -16
EN
FIGURE 2. PEAK DETECTOR
16
EN
FIGURE 3. LEAKY INTEGRATOR
B
Σ
R
E
G
32
16
X
B
Y
2
0, -8, -12, -16
A =
Y
N
= A * X + (1 - A) * Y
N-1
ISL5216
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ISL5216KIZ 功能描述:上下轉(zhuǎn)換器 W/ANNEAL QD DIGTL DWNCNVRTR IND TEMP RoHS:否 制造商:Texas Instruments 產(chǎn)品:Down Converters 射頻:52 MHz to 78 MHz 中頻:300 MHz LO頻率: 功率增益: P1dB: 工作電源電壓:1.8 V, 3.3 V 工作電源電流:120 mA 最大功率耗散:1 W 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFP-128
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