参数资料
| 型号： | CS5371A-ISZ |
| 厂商： | Cirrus Logic Inc |
| 文件页数： | 7/32页 |
| 文件大小： | 0K |
| 描述： | IC MODULATOR LP/HP 1CH 24-SSOP |
| 标准包装： | 59 |
| 类型： | 调制器 |
| 分辨率（位）： | 24 b |
| 采样率（每秒）： | 512k |
| 电压电源： | 模拟和数字 |
| 电源电压： | ±2.5V，3.3 V ~ 5 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 24-SSOP（0.209"，5.30mm 宽） |
| 供应商设备封装： | 24-SSOP |
| 包装： | 管件 |
| 配用： | 598-1778-ND - EVALUATION BOARD FOR CS5376 |
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CS5371A CS5372A
DS748F3
15
3.2 Decimated 24-bit Output
When the CS5371A and CS5372A modulator
operates with the CS5376A digital filter, the fi-
nal decimated, 24-bit, full-scale output code
range depends if digital offset correction is en-
abled. With digital offset correction enabled
within the digital filter, amplifier offset and the
modulator internal offset are removed from the
final conversion result.
3.3 Synchronization
The modulator is designed to operate synchro-
nously with other modulators in a distributed
measurement network, so a rising edge on the
MSYNC input resets the internal conversion
state machine to synchronize analog sample
timing. MSYNC is automatically generated by
the CS5376A digital filter after receiving a syn-
chronization signal from the external system,
and is chip-to-chip accurate within ± 1 MCLK
period.
3.4 Idle Tones
The CS5371A and CS5372A are delta-sigma-
type modulators and so can produce “idle
tones” in the measurement bandwidth when
the differential input signal is a steady-state
DC signal near mid-scale. Idle tones result
from low-frequency patterns in the output data
stream and appear in the measurement spec-
trum as small tones about -135 dB down from
full scale.
If the OFST pin is pulled high, idle tones are
eliminated within the modulator by adding
-60 mV (channel 1 of CS5371A and CS5372A)
or -35 mV (channel 2 of CS5372A) of internal
differential offset during conversion to push
idle tones out of the measurement bandwidth.
Care should be taken to ensure external offset
voltages do not negate the internally added
differential offset, or idle tones will re-appear.
3.5 Stability
The CS5371A and CS5372A
ΔΣ modulators
have a fourth-order architecture which is con-
ditionally stable and may go into an oscillatory
condition if the analog inputs are over-ranged
more than 5% past either positive or negative
full scale.
If an unstable condition is detected, the modu-
lator collapses to a first-order system and tran-
sitions the MFLAG output low-to-high to signal
an error condition to the CS5376A digital filter.
The analog input signal must be reduced to
within the full-scale range for at least 32 MCLK
cycles for the modulator to recover from an os-
cillatory condition. If the analog input remains
over-ranged for an extended period, the mod-
ulator will cycle between fourth-order and first-
order operation and the MFLAG output will be
seen to pulse.
Table 1. 24-Bit Output Coding for the CS5371A
and CS5372A Modulator and CS5376A Digital
Filter Combination
Modulator
Differential
Analog Input
Signal
CS5376A Digital Filter
24-Bit Output Code
Offset
Corrected
-60 mV
Offset
-35 mV
Offset
> + (VREF+5%)
Error Flag Possible
+ VREF
5D1420
5AD840
5BC688
0 V
000000
FDC420
FEB268
- VREF
A2EBE0
A527C0
A43978
> - (VREF+5%)
Error Flag Possible
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相关代理商/技术参数 |
参数描述 |
|---|---|
| CS5371A-ISZR | 功能描述:模数转换器 - ADC LP High Performance Delta Sigma Mod. 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 |
| CS5371-BS | 功能描述:模数转换器 - ADC LP High Performance Delta Sigma Mod. 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 |
| CS5371-BSR | 功能描述:模数转换器 - ADC LP High Performance Delta Sigma Mod. 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 |
| CS5371-BSZ | 功能描述:模数转换器 - ADC IC LP Hgh Prfrmnc Delta Sigma Modultr 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 |
| CS5371-BSZR | 功能描述:模数转换器 - ADC LP High Performance Delta Sigma Mod. 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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