参数资料
| 型号： | CS5371A-ISZR |
| 厂商： | Cirrus Logic Inc |
| 文件页数： | 9/32页 |
| 文件大小： | 0K |
| 描述： | IC MODULATOR LP/HP 1CH 24-SSOP |
| 标准包装： | 1,000 |
| 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： | 带卷 (TR) |
| 配用： | 598-1778-ND - EVALUATION BOARD FOR CS5376 |
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CS5371A CS5372A
DS748F3
17
4.3 Anti-alias Filter
The modulator inputs are required to be band-
width limited to ensure modulator loop stability
and prevent high-frequency signals from alias-
ing into the measurement bandwidth. The use
of simple, single-pole, differential, low-pass
RC filters across the INR± and INF± inputs en-
sures high-frequency signals are rejected be-
fore they can alias into the measurement
bandwidth.
The CS3301A / CS3302A differential amplifi-
ers are designed with separate rough and fine
analog outputs (OUTR±, OUTF±) that match
the modulator rough and fine inputs (INR±,
INF±). External anti-alias series resistors and
external differential capacitors are required to
create the anti-alias RC filters.
The approximate -3 dB corner of the input anti-
alias filter is nominally set to the internal ana-
log sampling rate divided by 64, which itself is
a division by 4 of the MCLK rate.
illustrates the CS5371A and
CS5372A modulator analog connections with
input anti-alias filter components. Filter com-
ponents on the rough and fine pins should be
identical values for optimum performance, with
the capacitor values a minimum of 0.02
μF.
The rough input can use either X7R- or C0G-
type capacitors, while the fine input requires
C0G-type capacitors for optimal linearity. Us-
ing X7R-type capacitors on the fine analog in-
puts will significantly degrade total harmonic
distortion performance.
4.4 Analog Differential Signals
Differential analog signals into the CS5371A
and CS5372A consist of two halves with equal
but opposite magnitude varying about a com-
mon mode voltage. A full-scale, 5 VP-P, differ-
ential signal centered on a -0.15 V common
mode voltage will have:
SIG+ = -0.15 V + 1.25 V = +1.1 V
SIG- = -0.15 V - 1.25 V = -1.4 V
SIG+ is +2.5 V relative to SIG-
For the opposite case:
SIG+ = -0.15 V - 1.25 V = -1.4 V
SIG- = -0.15 V + 1.25 V = +1.1 V
SIG+ is -2.5 V relative to SIG-
So the total swing for SIG+ relative to SIG- is
(+2.5 V) – (-2.5 V) = 5 Vp-p differential. A simi-
lar calculation can be done for SIG- relative to
SIG+.
It’s important to note that a 5 Vp-p differential
signal centered on a -0.15 V common mode
voltage never exceeds +1.1 V with respect to
ground and never drops below -1.4 V with re-
spect to ground on either half. By definition,
differential voltages are measured with re-
spect to the opposite half, not relative to
ground. A voltmeter differentially measuring
between SIG+ and SIG- in the above example
would correctly read 1.767 Vrms, or 5 Vp-p.
MCLK Frequency = 2.048 MHz
Sampling Frequency = MCLK / 4 = 512 kHz
-3 dB Filter Corner = Sampling Freq / 64 = 8 kHz
RC filter = 1 / [ 2
π x(2xRseries)xCdiff ] ~ 8 kHz
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相关代理商/技术参数 |
参数描述 |
|---|---|
| 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 |
| CS5372 | 制造商:CIRRUS 制造商全称:Cirrus Logic 功能描述:LOW POWER HIGH PERFORMANCE MODULATORS |
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