CS5534-AS - 24-Bit 4-Channel Low-Noise ADC | Cirrus Logic
料号： CS5534-AS ✗ 停产CS5534-AS 概述
A delta-sigma ADC is a voltage-to-digital conversion category that uses oversampling, noise shaping, and digital filtering to obtain high resolution from low-level analog signals. Delta-sigma converters belong to the wider ADC hierarchy and are especially effective in precision weighing, industrial process-control, scientific instrumentation, and medical equipment. The CS5534 family targets measurement systems in which low input-referred noise and programmable gain are more important than high conversion speed.
The CS5534-AS provides four multiplexed input channels, 24-bit resolution, bipolar-input capability, an integrated programmable-gain amplifier, an integrated modulator, a built-in digital filter, and soft-reset control. These functions reduce the number of external analog components required for low-level front ends. The -40°C to +85°C temperature range supports industrial equipment, while the analog architecture is designed to preserve measurement integrity when signals approach the converter's noise floor.
Its charge-balance delta-sigma architecture performs analog-to-digital conversion while transferring quantization noise away from the signal band of interest. The programmable-gain stage allows a weak sensor output to be amplified before conversion, improving use of the converter's full-scale range. Four analog inputs can be selected through the multiplexer for multiplexed transducers, resistance measurement networks, or multiple low-level channels.
Typical uses include precision weigh scales, load-cell amplifiers, industrial pressure and temperature instrumentation, laboratory data acquisition, process-control sensors, and medical monitoring equipment. For bridge sensors, the common-mode and gain requirements of the selected system should be checked against the datasheet before finalizing analog scaling.
Layout is especially important because converter performance depends on quiet reference and analog-return paths. Keep the analog and digital ground strategy consistent with the manufacturer guidance, place decoupling capacitors close to their supply pins, and route the reference connection away from switching nodes. Verify filter-clock, data-interface, and gain settings in firmware because configuration choices materially affect noise and settling behavior.
This page organizes the essential specifications, application guidance, design considerations, and qualified drop-in choices for engineers evaluating the CS5534-AS. It also distinguishes exact electrical equivalence from redesign-oriented converters, helping teams preserve an existing 24-pin SSOP layout when component continuity matters.
直接替换替代料： CS5534-AS ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： CS5534-AS （相同外形与封装尺寸） ——差异在于 Package, Interface, Number of Input Channels, Resolution, Architecture.
CS5534-ASZ
✅ 直接替换联系询价
查看数据手册 →CS5534-BSZ
✅ 直接替换联系询价
查看数据手册 →CS5533-ASZ
✅ 直接替换联系询价
查看数据手册 →CS5532-ASZ
✅ 直接替换联系询价
查看数据手册 →GX5534
✅ 直接替换📋 参考替代料（不在目录中）
CS5534-AS 最大额定值与电气特性
| Converter Type | 24-bit delta-sigma ADC |
| Number of Analog Input Channels | 4 channels |
| 分辨率 | 24 bit |
| Architecture | Charge-balance delta-sigma |
| Analog Front End | Integrated ultra-low-noise PGIA |
| Input Multiplexer | Integrated 4-channel multiplexer |
| Input Signal Type | Unipolar or bipolar |
| Modulator | Integrated |
| Digital Filter | Built-in |
| Reset Control | Soft reset |
| 工作温度范围 | -40°C to +85°C |
| 封装 | 24-pin SSOP |
| 安装类型 | Surface mount |
CS5534-AS 24-pin ssop 引脚配置指南
CS5534-AS（24-pin ssop 封装）的引脚配置。 该模拟元件具有输入、输出和电源引脚。请参阅制造商数据手册以了解失调调零、补偿和使能引脚配置。适用于信号调理和放大器电路。
暂无详细引脚数据： CS5534-AS.
请参阅 数据手册 以查看完整引脚配置。
典型应用
CS5534-AS 适用于 6 应用s: Precision Weighing Systems, Industrial Process-Control Instrumentation, Scientific and Laboratory Instrumentation, Medical Monitoring Equipment, Low-Level Sensor Acquisition, Precision Data Acquisition Systems.
Precision Weighing Systems
The CS5534-AS fits precision weighing systems because it combines a 24-bit converter with an integrated ultra-low-noise programmable-gain amplifier and a four-channel analog multiplexer. This arrangement supports bridge-based load cells, reference measurements, and temperature compensation in a compact measurement front end. The multiplexed input architecture can reduce the number of separate converters when several strain-gauge or auxiliary channels must be measured. Designers should select the gain range for the bridge output and verify excitation, common-mode voltage, input protection, offset calibration, and digital-filter settling before production release.
推荐
Industrial Process-Control Instrumentation
The CS5534-AS is appropriate for low-level industrial process signals requiring high resolution, flexible input selection, and an extended temperature range of -40°C to +85°C. Its four-channel multiplexer can scan pressure, temperature, level, or current-loop-derived sensor outputs, while the integrated PGIA conditions small signals before conversion. A delta-sigma architecture is useful when stable low-bandwidth readings matter more than rapid sampling. Confirm the selected gain, input limits, electrical isolation strategy, grounding arrangement, and digital-filter timing for each industrial channel.
推荐
Scientific and Laboratory Instrumentation
The 24-bit CS5534-AS can serve as the measurement front end in laboratory instruments that digitize low-level analog quantities with high resolution. Its ultra-low-noise PGIA helps retain useful signal amplitude before the charge-balance delta-sigma converter, while four inputs permit sequential acquisition from sensors or reference channels. The built-in digital filter supports repeatable low-bandwidth measurements, although its settling behavior must be coordinated with the instrument's sampling sequence. Use a quiet reference, controlled grounding, and shielded analog routing to preserve measurement integrity.
推荐
Medical Monitoring Equipment
The CS5534-AS can support low-level biomedical monitoring front ends when the complete signal chain satisfies the required safety, isolation, accuracy, and regulatory criteria. Its 24-bit resolution, bipolar-input capability, integrated PGIA, and four-channel multiplexer are useful for acquiring weak sensor-derived waveforms or slowly varying physiological signals. The converter itself does not establish medical-system compliance, so isolation, protection, leakage, validation, and risk-control requirements must be addressed at the system level. Confirm that the selected gain and filter settings preserve the diagnostic information required by the end product.
推荐
Low-Level Sensor Acquisition
The CS5534-AS is well matched to low-level sensor acquisition because its integrated programmable-gain stage conditions weak analog signals before digitization and its four-channel multiplexer supports sequential channel measurement. Possible sources include resistive bridges, thermocouple interfaces, strain sensors, and precision divider networks. The design must include suitable excitation, reference voltage, input filtering, and protection appropriate to the sensor. Because each gain and digital-filter setting changes noise and settling behavior, characterize the complete channel rather than relying only on nominal converter resolution.
推荐
Precision Data Acquisition Systems
The CS5534-AS supports precision multi-channel data-acquisition systems where each channel carries a low-level analog signal but high-resolution conversion is more important than high throughput. The integrated PGIA, four-way multiplexer, delta-sigma modulator, and digital filter provide a compact measurement core with minimal external conditioning. Its -40°C to +85°C range also suits industrial acquisition equipment. Plan acquisition timing around digital-filter settling, synchronize channel switching, and verify that the output format and serial interface match the host controller before schematic capture.
推荐
推荐产品汇总
工程参考数据： CS5534-AS ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | CS5534-ASZ | CS5534-BSZ | GX5534 |
|---|---|---|---|---|
| Brand | Cirrus Logic | Cirrus Logic | Cirrus Logic | GXSC |
| Package | 24-pin SSOP | 24-pin SSOP | 24-pin SSOP | 24-pin SSOP |
| Converter Architecture | Charge-balance delta-sigma | Charge-balance delta-sigma | Charge-balance delta-sigma | CS5534-compatible delta-sigma |
| Software Adjustment for Replacement | Original device baseline | Same family behavior expected; exact suffix review required | Same family behavior expected; exact suffix review required | Documented as requiring no hardware or software adjustments |
关键差异点
- Documented implementation continuity （对比 GX5534)
- Four-channel integration （对比 CS5533-ASZ)
- Low-noise measurement integration （对比 CS5532-ASZ)
- Same-family ordering continuity （对比 CS5534-ASZ)
设计说明
Treat the analog input and reference paths as sensitive signal routes. Place input filtering, reference components, and decoupling close to the CS5534-AS pins, keep the digital interface away from the analog inputs, and use the ground and return strategy specified in the manufacturer application guidance. A multilayer board can help separate analog and digital return currents, but the reference and analog-ground nodes still require careful placement because converter noise performance depends on the complete return path.
Account for the digital filter's settling time when switching among the four analog inputs. The host controller should discard or clearly distinguish conversion data captured during a transition, then collect the settled result defined by the configured filter mode. Validate channel switching with the intended sensor impedance, cable length, input network, and gain setting. Slow or high-impedance sensor sources can add settling time beyond the converter's nominal conversion sequence.
Provide local low-impedance bypass paths for the analog and digital supplies, and keep the reference voltage free from switching ripple. Because the CS5534-AS combines an ultra-low-noise PGIA with a delta-sigma converter, supply and reference noise can appear as measurement error even when nominal resolution is unchanged. Verify supply limits and recommended capacitor values in the manufacturer datasheet, and avoid routing converter or digital return currents through the sensitive reference return path.
Do not substitute CS5534-ASZ, CS5534-BSZ, or GX5534 solely because they appear in a comparison. For Cirrus Logic suffix changes, verify the package, temperature grade, lead finish, qualification, and ordering code. For GX5534, validate supply voltage, pin mapping, gain settings, digital timing, filter behavior, and calibration across temperature before production release. A drop-in footprint does not by itself guarantee identical behavior under every operating condition.
合规信息
The Cirrus Logic manufacturer page identifies the CS5531/32/33/34 family as discontinued. Exact suffix-specific environmental and qualification status must be confirmed from the manufacturer ordering documentation.