CS5533-ASZ - 16-Bit 4-Ch Sigma-Delta ADC with PGIA | Cirrus Logic
料号： CS5533-ASZ ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $3.13 | $3.13 |
| 10 | $2.91 | $29.10 |
| 100 | $2.68 | $268.00 |
| 500 | $2.45 | $1,225.00 |
| 1,000 | $2.25 | $2,250.00 |
CS5533-ASZ 概述
A sigma-delta ADC is a type of analog-to-digital converter that oversamples the input signal and applies digital decimation filtering to achieve very high resolution at low-to-moderate bandwidths. Within the data-conversion hierarchy, it sits under ADCs, then data acquisition ICs, then analog mixed-signal semiconductors. Sigma-delta converters excel where precision matters more than speed, such as weighing scales, temperature measurement and process-control front ends.
Key features of the CS5533-ASZ include the 16-bit delta-sigma modulator, four differential input channels multiplexed into one converter, and a chopper-stabilized instrumentation amplifier with only 6 nV/sqrt(Hz) noise density at 0.1 Hz. This extremely low flicker-noise corner is the defining strength of the CS553x family, enabling direct connection of low-level bridge and thermocouple signals without external precision amplifiers.
Architecturally, each conversion path flows through the multiplexed PGIA, a fourth-order delta-sigma modulator, and a linear-phase digital filter. The chopper-stabilized amplifier suppresses 1/f noise and offset drift, which are normally the dominant error sources in DC-precision designs. Serial SPI-compatible control allows gain, channel, and output-word-rate configuration, and self-calibration routines correct offset and gain errors in system.
Typical applications include industrial weigh-scale/load-cell front ends, temperature measurement via thermocouples and RTDs, and battery-test or process-control data acquisition systems. The four multiplexed channels let one ADC serve multiple sensors, cutting cost and board area in multi-channel instruments.
A key design consideration: the PGIA gain and output word rate trade against effective resolution; per the manufacturer product family page, noise performance must be evaluated at the selected gain and data rate, not at the headline value.
This page synthesizes distributor pricing, same-family drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
直接替换替代料： CS5533-ASZ ——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： CS5533-ASZ （相同外形与封装尺寸） ——差异在于 Number of Input Channels, Interface, Package, Calibration, Analog Supply Voltage.
快速对比工具——选择替代料号进行并排对比：
CS5533-BSZ
✅ 直接替换📋 参考替代料（不在目录中）
CS5534-ASZR
✅ 直接替换✓ 有现货
$3.55 / 个
查看数据手册 →CS5534-BSZ
✅ 直接替换✓ 有现货
联系询价
查看数据手册 →CS5534-ASZR
✅ 直接替换✓ 有现货
$3.55 / 个
查看数据手册 →CS5532-BSZ
✅ 直接替换✓ 有现货
$4.03 / 个
查看数据手册 →CS5532-ASZ
✅ 直接替换✓ 有现货
$9.85 / 个
查看数据手册 →CS5533-ASZ 最大额定值与电气特性
| 分辨率 | 16 bit |
| Number of Input Channels | 4 (differential, multiplexed) |
| Converter Type | Sigma-Delta (delta-sigma) |
| Integrated Amplifier | Ultra-low-noise PGIA (chopper-stabilized) |
| PGIA Gain Settings | 1x, 2x, 4x, 8x, 16x, 32x, 64x |
| Amplifier Input Noise | 6 nV/sqrt(Hz) at 0.1 Hz |
| 电源电压 | +5 V single supply, or +/-2.5 V / +/-3 V dual supply |
| 封装 | 24-SSOP |
| 安装类型 | Surface Mount |
| 接口 | Serial (SPI-compatible) |
| Product Family | CS5531/CS5532/CS5533/CS5534 |
CS5533-ASZ 24-ssop 引脚配置指南
CS5533-ASZ（24-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： CS5533-ASZ.
请参阅 数据手册 以查看完整引脚配置。
典型应用
CS5533-ASZ 适用于 6 应用s: Weigh Scale / Load Cell Front End, Thermocouple Temperature Measurement, RTD and Precision Process Sensing, Battery Test and Formation Systems, Industrial Data Acquisition / PLC Analog Input, Medical Instrumentation Signal Acquisition.
Weigh Scale / Load Cell Front End
The CS5533-ASZ fits weigh-scale designs because its chopper-stabilized PGIA provides 6 nV/sqrt(Hz) noise at 0.1 Hz with gains up to 64x, allowing direct connection of a few-mV full-scale load-cell bridge without an external precision amplifier. The sigma-delta converter's linear-phase digital filter attenuates 50/60 Hz mains interference that dominates scale installations, and self-calibration removes offset and gain drift over temperature. In a typical circuit the bridge excitation drives the ADC reference for ratiometric operation, cancelling excitation drift. The trade-off versus a 24-bit CS5534 is lower noise-free resolution, adequate for most commercial and industrial scale accuracy classes.
推荐
Thermocouple Temperature Measurement
The CS5533-ASZ suits thermocouple acquisition because type J/K/T thermocouples produce tens of microvolts per degree C, and the PGIA's 6 nV/sqrt(Hz) input noise at 0.1 Hz keeps quantization and amplifier noise below one measurement LSB at moderate gain settings. The +/-2.5 V or +/-3 V dual-supply mode accommodates bipolar input signals around ground, simplifying cold-junction offset handling. Four multiplexed differential channels let one CS5533-ASZ scan multiple thermocouples plus an ambient reference channel, reducing BOM cost in multi-point monitoring. Chopper stabilization eliminates 1/f noise and offset drift, the dominant errors in DC-coupled thermocouple systems.
推荐
RTD and Precision Process Sensing
For RTD measurement the CS5533-ASZ pairs naturally with ratiometric excitation: a single current or voltage source drives both the RTD and the ADC reference, so reference drift cancels in the digital result. The PGIA's selectable gains (1x to 64x) match the small voltage change per degree across a 100-ohm platinum element, and the chopper-stabilized input stage suppresses thermal EMF errors at connector junctions. In process-control front ends the 16-bit resolution with self-calibration supports typical 0.1% loop accuracy. Linear-phase digital filtering preserves waveform shape for transient events while rejecting mains interference at 50 and 60 Hz.
推荐
Battery Test and Formation Systems
Battery testers require microvolt-level voltage measurement across cells while handling common-mode voltages, and the CS5533-ASZ addresses this with its differential PGIA inputs, 64x maximum gain, and 16-bit resolution with self-calibration to remove drift between test cycles. The four multiplexed differential channels allow sequential monitoring of multiple cell taps or sense points with one converter, cutting channel cost in multi-cell fixtures. The sigma-delta oversampling architecture averages charge-injection and noise over the conversion window, improving repeatability in long-duration charge/discharge integration tests. Chopper stabilization keeps offset stable over the minutes-to-hours timescales of formation cycling.
推荐
Industrial Data Acquisition / PLC Analog Input
The CS5533-ASZ works as a compact multi-channel analog front end for PLC and DAQ modules: four differential inputs with software-selectable gains let one IC condition 4-20 mA shunt signals, bridge sensors, and low-level thermocouples alike. The serial SPI-compatible interface integrates with any MCU, and register-configurable output word rates trade speed against resolution to match each channel's needs. Its +5 V single-supply mode simplifies the industrial 5 V power tree. Compared with discrete PGA-plus-ADC solutions, the integrated chopper-stabilized PGIA removes inter-component offset errors and saves board area in dense I/O cards.
推荐
Medical Instrumentation Signal Acquisition
Low-level biopotential and physiological sensor signals benefit from the CS5533-ASZ's 6 nV/sqrt(Hz) chopper-stabilized amplifier, which keeps input-referred noise far below typical sensor signal levels over the DC-to-low-frequency band of interest. Gains from 1x to 64x allow front-end scaling for bridge-based pressure sensors, and the linear-phase digital filter avoids waveform distortion in measured physiological transients. Multiplexed differential channels support multi-sensor patient or laboratory instruments with a single converter, while self-calibration maintains DC accuracy without manual trimming. Designers must observe the applicable medical electrical safety standards for patient-connected circuits in the surrounding system.
推荐
推荐产品汇总
工程参考数据： CS5533-ASZ ——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 | CS5533-BSZ | CS5534-ASZ | CS5534-BSZ | CS5532-BSZ |
|---|---|---|---|---|---|
| Package | 24-SSOP | 24-SSOP - same | 24-SSOP - same | 24-SSOP - same | 24-SSOP - same |
| Brand | Cirrus Logic | Cirrus Logic | Cirrus Logic | Cirrus Logic | Cirrus Logic |
| Input Channels | 4 differential | 4 differential | 4 differential | 4 differential | 2 differential |
| PGIA Gain Range | 1x to 64x | 1x to 64x | 1x to 64x | 1x to 64x | 1x to 64x |
| Amplifier Noise | 6 nV/sqrt(Hz) at 0.1 Hz | 6 nV/sqrt(Hz) at 0.1 Hz | 6 nV/sqrt(Hz) at 0.1 Hz | 6 nV/sqrt(Hz) at 0.1 Hz | 6 nV/sqrt(Hz) at 0.1 Hz |
| Supply Voltage | +5 V or +/-2.5 V / +/-3 V | +5 V or +/-2.5 V / +/-3 V | +5 V or +/-2.5 V / +/-3 V | +5 V or +/-2.5 V / +/-3 V | +5 V or +/-2.5 V / +/-3 V |
关键差异点
- Ultra-low 1/f noise corner from chopper-stabilized PGIA （对比 CS5532-BSZ)
- Cost-optimized 16-bit resolution （对比 CS5534-ASZ)
- Family-based second sourcing with zero hardware change （对比 CS5534-BSZ)
设计说明
Treat the analog input section as a low-level differential domain. Route AIN pairs as tightly coupled traces away from the SCLK/SDI/SDO serial bus, and use a solid analog ground plane under the converter. Place 100 nF ceramic decoupling capacitors directly at the supply, reference, and PGIA input pins, with bulk capacitance near the part. Per the Cirrus Logic CS5531/32/33/34 family documentation, the chopper-stabilized amplifier achieves 6 nV/sqrt(Hz) at 0.1 Hz only when supply and reference noise are kept low.
Power the CS5533-ASZ from a quiet linear or well-post-regulated rail. A switching converter placed upstream without adequate LC filtering will couple ripple into the PGIA through supply rejection limits and raise the noise floor well above the datasheet characteristic. If a single +5 V rail is used, remember dual-supply mode (+/-2.5 V or +/-3 V) is available when bipolar sensor signals must swing around ground. Estimated: a series ferrite plus 10 uF/100 nF decoupling typically provides sufficient broadband isolation for this converter class.
Do not evaluate resolution at the headline 16-bit figure alone: effective noise-free resolution depends on the selected PGIA gain and output word rate, per the manufacturer family documentation. Also confirm the exact temperature-grade suffix when sourcing - CS5533-ASZ and CS5533-BSZ share the same die but differ in grade, and distributors list both. Finally, remember no cross-brand pin-to-pin replacement exists; the TI ADS1248 requires firmware and PCB changes, so second-source strategy should rely on CS5534/CS5532 family members.
合规信息
Compliance data was not present in the provided web data. Consult the Cirrus Logic product page or distributor environmental listings for RoHS/REACH status.
