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| 型号： | CS5522-ASZR |
| 厂商： | Cirrus Logic Inc |
| 文件页数： | 27/56页 |
| 文件大小： | 0K |
| 描述： | IC ADC 24BIT 2CH 20-SSOP |
| 标准包装： | 1,000 |
| 位数： | 24 |
| 数据接口： | 串行 |
| 转换器数目： | 1 |
| 功率耗散（最大）： | 14.8mW |
| 电压电源： | 模拟和数字 |
| 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： | 带卷 (TR) |
| 输入数目和类型： | 2 个差分，单极；2 个差分，双极 |
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CS5521/22/23/24/28
DS317F8
33
perform a system gain calibration. In either case,
the calibration signals must be within the specified
calibration limits for each specific calibration step
(refer to the ‘System Calibration Specifications’ in
ANALOG CHARACTERISTICS). If a system gain
calibration is performed the following conditions
must be met:
1) Full-scale input must not saturate the 20X in-
strumentation amplifier, if the calibration is on
an input range where the instrumentation am-
plifier is involved.
2) The 1’s density of the modulator must not be
greater than 80 percent (the input to the
ΔΣ
modulator must not exceed the maximum input
which Table 1 specifies).
3) The input must not be so small, relative to the
range chosen, that the resulting gain register’s
content,
decoded
in
decimal,
exceeds
3.9999998 (see the discussion of operating lim-
its on input span under the Analog Input and
Limitations in Calibration Range sections).
This requires the full-scale input voltage to the
modulator to be at least 25 percent of the nom-
inal value.
The converter’s input ranges were chosen to guar-
antee gain calibration accuracy to 1 LSB16 or 16
LSB24 when system gain calibration is performed.
This is useful when a user wants to manually scale
the full-scale range of the converter and maintain
accuracy. For example, if a gain calibration is per-
formed with a 2.5 V full-scale voltage and a 1.25 V
input range is desired, the user can read the con-
tents of the gain register, shift the register contents
left by 1 bit, and then write the result back to the
gain register. This multiplies the gain by 2.
Assuming a system can provide two known voltag-
es, the following equations allow the user to manu-
ally compute the calibration register’s values based
on two uncalibrated conversions (see note). The
offset and gain calibration registers are used to ad-
just a typical conversion as follows:
Rc = (Ru + Co) * Cg / 222.
Calibration can be performed using the following
equations:
Co = (Rc0/G - Ru0)
Cg = 222 * G
where G = (Rc1 - Rc0)/(Ru1-Ru0).
Note: Uncalibrated conversions imply that the gain and off-
set registers are at default {gain register = 0x400000
(Hex) and offset register = 0x000000 (Hex)}.
+
-
X20
+
-
External
Connections
+
-
AIN+
AIN-
CM +
-
0V
Figure 15. System Calibration of Offset (High Ranges)
+
-
X20
+
-
External
Connections
Full Scale +
-
AIN+
AIN-
CM +
-
Figure 16. System Calibration of Gain (Low Ranges)
+
-
X20
+
-
External
Connections
Full Scale
+
-
AIN+
AIN-
CM
+
-
Figure 17. System Calibration of Gain (High Ranges)
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相关代理商/技术参数 |
参数描述 |
|---|---|
| CS5523 | 制造商:CIRRUS 制造商全称:Cirrus Logic 功能描述:16-bit or 24-bit, 2/4/8-channel ADCs with PGIA |
| CS5523-AP | 制造商:CIRRUS 制造商全称:Cirrus Logic 功能描述:16 BIT OR 24 BIT 2/4/8 CHANNEL ADCS WITH PGIA |
| CS5523-AS | 功能描述:模数转换器 - ADC 4-Ch 16-Bit Delta Sigma ADC 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 |
| CS5523-ASZ | 功能描述:模数转换器 - ADC 4-Ch 16-Bit Delta Sigma ADC 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 |
| CS5523-ASZR | 功能描述:模数转换器 - ADC IC 2-Chl 16Bit Bffrd Dlt Sgm Mlt-Rng ADC 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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