參數(shù)資料
型號(hào): CS5528-ASZR
廠商: Cirrus Logic Inc
文件頁數(shù): 9/56頁
文件大?。?/td> 0K
描述: IC ADC 24BIT 8CH 24-SSOP
標(biāo)準(zhǔn)包裝: 1,000
位數(shù): 24
數(shù)據(jù)接口: 串行
轉(zhuǎn)換器數(shù)目: 1
功率耗散(最大): 14.8mW
電壓電源: 模擬和數(shù)字
工作溫度: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 24-SSOP(0.209",5.30mm 寬)
供應(yīng)商設(shè)備封裝: 24-SSOP
包裝: 帶卷 (TR)
輸入數(shù)目和類型: 8 個(gè)單端,單極;8 個(gè)單端,雙極
CS5521/22/23/24/28
DS317F8
17
mentation amplifier, and providing a number of
flags which indicate converter operation.
A group of registers, called Channel Set-up Regis-
ters, are also included in the converters. These reg-
isters are used to hold pre-loaded conversion
instructions. Each channel set-up register is 24 bits
wide and holds two 12-bit conversion instructions
(Setups). Upon power-up, these registers can be
initialized by the user’s microcontroller with con-
version instructions. The user can then use bits in
the configuration register to choose a conversion
mode.
Several conversion modes are possible. Using the
single conversion mode, an 8-bit command word
can be written into the serial port. The command in-
cludes pointer bits which ‘point’ to a 12-bit com-
mand in one of the Channel Setup Registers which
is to be executed. The 12-bit commands can be set-
up to perform a conversion on any of the input
channels of the converter. More than one of the 12-
bit Setups can be used for the same analog input
channel. This allows the user to convert on the
same signal with either a different conversion
speed, a different gain range, or any of the other op-
tions available in the Setup Register. The user can
set up the registers to perform conversions using
different conversion options on each of the input
channels.
The ADCs also include multiple-channel conver-
sion capability. User bits in the configuration regis-
ter of the ADCs can be configured to sequence
through the 12-bit command Setups, performing a
conversion according to the content of each 12-bit
Setup. This channel scanning capability can be
configured to run continuously, or to scan through
a specified number of Setup Registers and stop un-
til commanded to continue. In the multiple-channel
scanning modes, the conversion data words are
loaded into an on-chip data FIFO. The converter is-
sues a flag on the SDO pin when a scan cycle is
completed so the user can read the FIFO. More de-
tails are given in the following pages.
Instructions are provided on how to initialize the
converter, perform offset and gain calibrations, and
to configure the converter for the various conver-
sion modes. Each of the bits of the configuration
register and of the Channel Setup Registers is de-
scribed. A list of examples follows the description
section. Table 2 can be used to decode all valid
commands (the first 8 bits into the serial port).
AIN1
AIN2
AIN3
AIN4
4 (24)
4 (12 x 2)
8 x 24
Off 1
Off 2
Off 3
Off 4
Gain 1
Gain 2
Gain 3
Gain 4
Setup 1
Setup 3
Setup 5
Setup 7
Setup 2
Setup 4
Setup 6
Setup 8
DATA
FIFO
SDO
1 x 24
Configuration
Chop Frequency
Multiple Conversions
Depth Pointer
Loop
Read Convert
Powerdown Modes
Flags
Etc.
Latch Outputs
Channel Select
Output Word Rate
PGA Selection
Unipolar/Bipolar
Figure 9. CS5523/24 Register Diagram
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