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| 型号： | CS5531-ASZ |
| 厂商： | Cirrus Logic Inc |
| 文件页数： | 27/43页 |
| 文件大小： | 0K |
| 描述： | IC ADC 16BIT 2CH W/LNA 20SSOP |
| 标准包装： | 66 |
| 位数： | 16 |
| 采样率（每秒）： | 3.84k |
| 数据接口： | 串行 |
| 转换器数目： | 1 |
| 功率耗散（最大）： | 45mW |
| 电压电源： | 模拟和数字，双 ± |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 20-SSOP（0.209"，5.30mm 宽） |
| 供应商设备封装： | 20-SSOP |
| 包装： | 管件 |
| 输入数目和类型： | 2 个差分，单极；2 个差分，双极 |
| 产品目录页面： | 755 (CN2011-ZH PDF) |
| 其它名称： | 598-1111-5 |
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CS5531/32/33/34-AS
DS289F5
33
crocontroller and the ADC, and may prematurely
halt the calibration cycle.
For maximum accuracy, calibrations should be per-
formed for both offset and gain (selected by chang-
ing the G2-G0 bits of the channel-setup registers).
Note that only one gain range can be calibrated per
physical channel when the OGS bit in the Configu-
ration Register is set to ‘0’. Multiple gain ranges
can be calibrated for a single channel by manipulat-
ing the OGS bit and the OG1-OG0 bits of the se-
lected Setup (see Section 2.3.7 for more details). If
factory calibration of the user’s system is per-
formed using the system calibration capabilities of
the CS5531/32/33/34, the offset and gain register
contents can be read by the system microcontroller
and recorded in non-volatile memory. These same
calibration words can then be uploaded into the off-
set and gain registers of the converter when power
is first applied to the system, or when the gain range
is changed.
When the device is used without calibration, the
uncalibrated gain accuracy is about ±1% and the
gain tracking from range to range (2x to 64x) is ap-
proximately ±0.3 percent.
Note that the gain from the offset register to the
output is 1.83007966 decimal, not 1. If a user wants
to adjust the calibration coefficients externally,
they will need to divide the information to be writ-
ten to the offset register by the scale factor of
1.83007966. (This discussion assumes that the gain
register is 1.000...000 decimal. The offset register
is also multiplied by the gain register before being
applied to the output conversion words).
2.5.8. Limitations in Calibration Range
System calibration can be limited by signal head-
room in the analog signal path inside the chip as
discussed under the Analog Input section of this
data sheet. For gain calibration, the full-scale input
signal can be reduced to 3% of the nominal full-
scale value. At this point, the gain register is ap-
proximately equal to 33.33 (decimal). While the
gain register can hold numbers all the way up to
64 – 2-24, gain register settings above a decimal
value of 40 should not be used. With the convert-
er’s intrinsic gain error, this minimum full-scale in-
put signal may be higher or lower. In defining the
minimum Full Scale Calibration Range (FSCR)
under Analog Characteristics, margin is retained to
accommodate the intrinsic gain error. Inversely, the
input full-scale signal can be increased to a point in
which the modulator reaches its 1’s density limit of
86 percent, which under nominal conditions occurs
when the full-scale input signal is 1.1 times the
nominal full-scale value. With the chip’s intrinsic
gain error, this maximum full-scale input signal
maybe higher or lower. In defining the maximum
FSCR, margin is again incorporated to accommo-
date the intrinsic gain error.
2.6. Performing Conversions
The CS5531/32/33/34 offers two distinctly differ-
ent conversion modes. The three sections that fol-
low detail the differences and provide examples
illustrating how to use the conversion modes with
the channel-setup registers.
2.6.1. Single Conversion Mode
Based on the information provided in the channel-
setup registers (CSRs), after the user transmits the
conversion command, a single, fully settled con-
version is performed. The command byte includes
a pointer address to the Setup register to be used
during the conversion. Once transmitted, the serial
port enters data mode where it waits until the con-
version is complete. When the conversion data is
available, SDO falls to logic 0. Forty SCLKs are
then needed to read the conversion data word. The
first 8 SCLKs are used to clear the SDO flag. Dur-
ing the first 8 SCLKs, SDI must be logic 0. The last
32 SCLKs are needed to read the conversion result.
Note that the user is forced to read the conversion
in single conversion mode as SDO will remain low
(i.e. the serial port is in data mode) until SCLK
transitions 40 times. After reading the data, the se-
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相关代理商/技术参数 |
参数描述 |
|---|---|
| CS5531-ASZR | 功能描述:模数转换器 - ADC IC 16-Bit ADCs w/UltraLw Noise PGIA RoHS:否 制造商:Texas Instruments 通道数量:2 结构:Sigma-Delta 转换速率:125 SPs to 8 KSPs 分辨率:24 bit 输入类型:Differential 信噪比:107 dB 接口类型:SPI 工作电源电压:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-32 |
| CS5532 | 制造商:CIRRUS 制造商全称:Cirrus Logic 功能描述:16 BIT AND 24 BIT ADCS WITH ULTRA LOW NOISE PGIA |
| CS5532-AS | 功能描述:模数转换器 - ADC 2-Ch 24-Bit ADCs w/ Ultra Low Noise PGIA RoHS:否 制造商:Texas Instruments 通道数量:2 结构:Sigma-Delta 转换速率:125 SPs to 8 KSPs 分辨率:24 bit 输入类型:Differential 信噪比:107 dB 接口类型:SPI 工作电源电压:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-32 |
| CS5532-ASR | 功能描述:模数转换器 - ADC IC 16-Bit ADCs w/UltraLw Noise PGIA RoHS:否 制造商:Texas Instruments 通道数量:2 结构:Sigma-Delta 转换速率:125 SPs to 8 KSPs 分辨率:24 bit 输入类型:Differential 信噪比:107 dB 接口类型:SPI 工作电源电压:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-32 |
| CS5532-ASZ | 功能描述:模数转换器 - ADC 2-Ch 24-Bit ADCs w/ Ultra Low Noise PGIA RoHS:否 制造商:Texas Instruments 通道数量:2 结构:Sigma-Delta 转换速率:125 SPs to 8 KSPs 分辨率:24 bit 输入类型:Differential 信噪比:107 dB 接口类型:SPI 工作电源电压:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-32 |
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