参数资料
| 型号： | CS5371-BSZR |
| 厂商： | Cirrus Logic Inc |
| 文件页数： | 4/22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 |
CS5371 CS5372
12
DS255F3
over which voltage reference noise affects the
CS5371/72 modulator dynamic range.
6.1.
Voltage Reference Configurations
For a 2.5 V reference, the Linear Technology
LT1019-2.5 voltage reference yields low enough
noise if the output is filtered with a low pass RC fil-
ter as shown in Figure 6. The filtered version in
Figure 6 is acceptable for most spectral measure-
ment applications, but a buffered version with low-
er source impedance may be preferred for DC
measurement applications.
6.2.
VREF Input Impedance
The switched-capacitor input architecture of the
VREF+ pin causes the input current required from
the voltage reference to change any time MCLK is
changed. The input impedance of the voltage ref-
erence input is calculated similar to the analog sig-
nal input impedance as [1 / (f * C)] where f is the
modulator clock frequency, MCLK, and C is the in-
ternal sampling capacitor.
A 2.048 MHz MCLK
yields a voltage reference input impedance of ap-
proximately [1 / (2.048 MHz)*(20 pF)], or about
24 k
.
6.3.
Gain Accuracy
Gain accuracy of the CS5371/72 modulators is af-
fected by variations of the voltage reference input.
A change in the voltage reference input impedance
due to a change in MCLK could affect gain accura-
cy when using the higher source impedance con-
figuration of Figure 6.
The VREF+ pin input
impedance and the external low-pass filter resistor
create a voltage divider for the output reference
voltage, reducing the effective voltage reference
input. If gain error is to be minimized, especially
when MCLK is to be changed, the voltage refer-
ence should have a low output impedance to mini-
mize the effect of the resistive voltage divider. A
buffered voltage reference configuration offers
lower output impedance and more stable gain
characteristics.
6.4.
Gain Drift
Gain drift of the CS5371/72 modulators due to tem-
perature is around 5 ppm/°C, and does not include
the temperature drift characteristics of the external
voltage reference. Gain drift is not affected by the
modulator sample rate or by power supply varia-
tions.
7. DIGITAL FILTER INTERFACE
The CS5371/72 modulators are designed to oper-
ate with the CS5376A and CS5378 digital filters.
The digital filter generates the modulator clock and
synchronization
signal
inputs
(MCLK
and
MSYNC), while receiving the modulator data and
over-range flag outputs (MDATA and MFLAG).
The modulators produce an oversampled
Σ serial
10
To VREF+
To VREF -
0.1
F
100
F
+
+VA
2.5 REF
0.1
F
10
F
-VA
0.1
F
10
F
Figure 6. 2.5 Voltage Reference
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相关代理商/技术参数 |
参数描述 |
|---|---|
| CS5372 | 制造商:CIRRUS 制造商全称:Cirrus Logic 功能描述:LOW POWER HIGH PERFORMANCE MODULATORS |
| CS5372A | 制造商:CIRRUS 制造商全称:Cirrus Logic 功能描述:Low-power, High-performance Modulators |
| CS5372A-IS | 功能描述:接口 - 专用 LP High Performance Delta Sigma Mod. RoHS:否 制造商:Texas Instruments 产品类型:1080p60 Image Sensor Receiver 工作电源电压:1.8 V 电源电流:89 mA 最大功率耗散: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:BGA-59 |
| CS5372A-ISR | 功能描述:接口 - 专用 LP High Performance Delta Sigma Mod. RoHS:否 制造商:Texas Instruments 产品类型:1080p60 Image Sensor Receiver 工作电源电压:1.8 V 电源电流:89 mA 最大功率耗散: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:BGA-59 |
| CS5372A-ISZ | 功能描述:接口 - 专用 IC LP Hgh Prfrmnc Delta Sigma Modultr RoHS:否 制造商:Texas Instruments 产品类型:1080p60 Image Sensor Receiver 工作电源电压:1.8 V 电源电流:89 mA 最大功率耗散: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:BGA-59 |
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