參數(shù)資料
型號(hào)： ISL5416EVAL1
廠(chǎng)商： Intersil Corporation
英文描述： Four-Channel Wideband Programmable DownConverter
中文描述： 四通道可編程寬帶下變頻器
文件頁(yè)數(shù)： 45/71頁(yè)
文件大?。?/td> 1128K
代理商： ISL5416EVAL1
45
NOTES ON LOADING AND READING THE RANGE CONTROL ACCUMULATOR:
Master Bus -> Holding Register -> Accumulator -> Holding Register
The accumulator is 17 bits. The lower 16 bits are loaded from the micro-processor interface master register into a holding register.
The MSB of the input holding register is always zero. The accumulator is loaded from the holding register. When the accumulator is
read, the most significant 16 accumulator bits are returned (the LSB of the accumulator is not read).
Range Control bit weights are listed in Table 85 in the back
of the data sheet.
TABLE 42.
ACCUMULATOR
16:0
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
MASTER
15:0
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
IWA = 0*19h
Z, 15:0
0
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
IWA = 0*1Bh
16:1
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
TABLE 43. LEAK FACTOR (BIAS) (IWA = 0*16h)
RESET STATE = 0x00000000h
THIS CONTROL IS SHARED FOR AIN/BIN AND FOR
CIN/DIN
P(31:0)
FUNCTION
31:16
UNUSED.
15:0
LEAK FACTOR.
This signed value is added to the attenuator control register if the average input magnitude is between the upper and lower thresholds
when updates are enabled (at the end of integration)
S [ S -1 . . . -15 ] into the 17-bit accumulator. MSB of 16 programmable bits (S) has a weight of -24 dB.
TABLE 44. GAIN MAPPING LOOK-UP TABLE REGISTER 1 (IWA = 0*17h)
RESET STATE = 0x00000000h
P(31:0)
FUNCTION
31:24
ATTENUATION CODE 3 (18 dB code). 8 bit output code when the attenuation register MSBs = 011b. See output E routing control
for bit to pin mapping.
23:16
ATTENUATION CODE 2 (12 dB code). 8 bit output code when the attenuation register MSBs = 010b. See output E routing control
for bit to pin mapping.
15:8
ATTENUATION CODE 1 (6 dB code). 8 bit output code when the attenuation register MSBs = 001b. See output E routing control for
bit to pin mapping.
7:0
ATTENUATION CODE 0 (0 dB code). 8 bit output code when the attenuation register MSBs = 000b. See output E routing control for
bit to pin mapping.
TABLE 45. GAIN MAPPING LOOK-UP TABLE REGISTER 2 (IWA = 0*18h)
RESET STATE = 0x00000000h
P(31:0)
FUNCTION
31:24
ATTENUATION CODE 7 (42 dB code). 8 bit output code when the attenuation register MSBs = 111b. See output E routing control
for bit to pin mapping.
23:16
ATTENUATION CODE 6 (36 dB code). 8 bit output code when the attenuation register MSBs = 110b. See output E routing control
for bit to pin mapping.
15:8
ATTENUATION CODE 5 (30 dB code). 8 bit output code when the attenuation register MSBs = 101b. See output E routing control
for bit to pin mapping.
7:0
ATTENUATION CODE 4 (24 dB code). 8 bit output code when the attenuation register MSBs = 100b. See output E routing control
for bit to pin mapping.
TABLE 46.
μ
P ATTENUATOR CONTROL ACCUMULATOR LOAD (IWA = 0*19h)
RESET STATE = 0x00000000h
P(31:0)
FUNCTION
31:16
RESERVED. Set to 0.
ISL5416
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