CS5534-BSZ - 24-Bit Sigma-Delta ADC with PGIA | Cirrus Logic
MPN： CS5534-BSZ ✓ 啟用中CS5534-BSZ 概覽
A delta-sigma ADC is a type of analog-to-digital converter that uses oversampling and noise shaping, combined with digital decimation filtering, to achieve very high resolution - in this case 24 bits - from relatively simple analog circuitry. In the signal-chain hierarchy, the CS5534-BSZ sits between the analog front end (sensors such as load cells, RTDs, and bridge transducers) and the digital controller, making it a core precision data-acquisition component.
Key features include 24-bit resolution using charge-balance conversion techniques, four differential input channels, an integrated PGIA with programmable gain for measuring low-level unipolar or bipolar signals, and ultra-low-noise performance optimized for weigh-scale and process-control accuracy. The wide supply range of 2.375V to 5V in single or dual supply operation, at approximately 13 mA of supply current, simplifies integration into industrial systems.
The architecture uses charge-balance delta-sigma modulation to achieve 24-bit performance, which is especially effective at rejecting line-frequency noise when the conversion rate is synchronized to the power-line period. The integrated PGIA eliminates a discrete instrumentation amplifier stage, reducing board area, component count, and gain-drift error sources between the sensor and the converter.
Typical applications include weigh scales, process control transmitters, scientific instrumentation, and medical equipment, all of which measure low-level differential signals where resolution and noise directly affect system accuracy.
A key design consideration is supply-domain planning: the 2.375V to 5V operating range supports both 3.3V and 5V logic, but analog supply cleanliness and reference stability dominate achieved noise-floor performance, so low-noise LDOs and precision references are strongly recommended.
This page synthesizes distributor availability data, same-family drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
直接替換替代品，適用於 CS5534-BSZ — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： CS5534-BSZ （相同外形與佔位） — 差異在於 Number of Input Channels, Package, Interface, Input Type, Calibration.
CS5534-ASZR
✅ 直接替換聯絡詢價
查看資料表 →CS5534-ASZR
✅ 直接替換聯絡詢價
查看資料表 →CS5532-BSZ
✅ 直接替換聯絡詢價
查看資料表 →CS5532-ASZ
✅ 直接替換聯絡詢價
查看資料表 →CS5530-ISZ
✅ 直接替換📋 參考替代品（不在目錄中）
CS5534-BSZ 最大額定值與電氣特性
| 解析度 | 24 bit |
| Number of Input Channels | 4 differential inputs |
| Conversion Type | Sigma-Delta (charge-balance) |
| 取樣率 | 3.84 kSPS |
| Analog Input Type | Differential |
| Integrated Amplifier | Ultra-low-noise PGIA |
| 介面 | Serial, 3-wire (SPI-compatible) |
| Supply Voltage Range | 2.375 V to 5 V (single or dual supply) |
| 供應電流 | 13 mA |
| 封裝 | 24-SSOP (0.209 in, 5.30 mm width) |
| Contact Plating | Matte tin |
| 安裝類型 | Surface Mount |
| Target Applications | Weigh scale, process control, scientific, medical |
| Signal Type | Low-level unipolar or bipolar |
| Manufacturer Series | CS5532/CS5534 |
CS5534-BSZ 24-ssop (0.209 in, 5.30 mm width) 腳位配置指南
CS5534-BSZ（24-ssop (0.209 in, 5.30 mm width) 封裝）的腳位配置。 此類比元件具有輸入、輸出與電源腳位。偏移歸零、補償與致能腳位配置請參閱製造商資料表。適用於訊號調理與放大器電路。
無詳細腳位定義資料： CS5534-BSZ.
請參閱 資料表 以查看完整腳位配置。
典型應用
CS5534-BSZ 適用於 6 應用s: Weigh Scale Systems, Process Control Transmitters, Scientific Instrumentation, Medical Diagnostic Equipment, Industrial Data Acquisition Modules, Bridge Sensor and Load Cell Front Ends.
Weigh Scale Systems
The CS5534-BSZ is explicitly optimized by Cirrus Logic for weigh scale applications, where load-cell bridge outputs of only a few millivolts full-scale must be resolved to 24-bit precision. The integrated ultra-low-noise PGIA provides programmable gain directly at the converter input, eliminating a separate instrumentation amplifier stage and its associated offset drift between the load cell and the ADC. Placed immediately after the bridge with a stable reference, the charge-balance delta-sigma architecture rejects line-frequency noise when conversion timing is synchronized to the mains period, improving weigh stability. The 3.84 kSPS output rate is far faster than mechanical weighing dynamics, enabling digital filtering and averaging for repeatable results in retail, industrial, and laboratory scales.
推薦
Process Control Transmitters
In process control, low-level bipolar signals from RTDs, thermocouples, and pressure transducers must be digitized accurately in electrically noisy factory environments. The CS5534-BSZ fits because its 24-bit resolution, differential inputs, and ultra-low-noise PGIA preserve microvolt-level signal information, while the 2.375V to 5V single or dual supply operation at 13 mA integrates easily into 4-20 mA loop-powered and 24 V field architectures via simple front-end conditioning. The four differential channels allow one device to monitor multiple sensor points sequentially, reducing cost per channel. According to Cirrus Logic, this family is specifically targeted at process control, and its charge-balance conversion provides strong normal-mode noise rejection at the low conversion rates typical of process variables such as temperature and pressure.
推薦
Scientific Instrumentation
Scientific instruments - spectrometers, electrometers, and precision measurement benches - require ADCs whose noise floor does not mask the phenomena under study. The CS5534-BSZ addresses this with 24-bit charge-balance delta-sigma conversion and an integrated ultra-low-noise PGIA, letting experimenters digitize low-level unipolar or bipolar sensor outputs directly. Its 3.84 kSPS rate suits quasi-static measurements where resolution matters more than bandwidth, and the SPI-compatible 3-wire serial interface connects cleanly to microcontrollers and FPGAs without parallel bus complexity. Because the four differential channels share one converter core, channel-to-channel matching is consistent for comparative experiments. Using low-noise linear supplies and a precision voltage reference preserves the converter's datasheet-level noise performance in the final instrument.
推薦
Medical Diagnostic Equipment
Medical instrumentation such as patient monitors, diagnostic analyzers, and biosignal acquisition boards measures very small differential signals where safety, accuracy, and low noise are regulated requirements. The CS5534-BSZ is cited by Cirrus Logic and distributors (KATY, WIN SOURCE) as targeting medical applications, thanks to its 24-bit resolution, integrated low-noise PGIA, and differential input architecture that rejects common-mode interference from mains-coupled environments. The 2.375V to 5V supply range and 13 mA consumption support battery-powered and low-power portable designs, extending operating time between charges. Its 3.84 kSPS maximum rate comfortably covers physiological signal bandwidths after digital decimation, while four input channels allow multi-parameter acquisition - for example, temperature plus pressure sensing - in a single converter.
推薦
Industrial Data Acquisition Modules
Multi-channel industrial DAQ modules benefit directly from the CS5534-BSZ's four differential inputs on a single 24-SSOP die: one converter, one SPI port, and one reference serve multiple sensors, cutting board area and BOM cost versus per-channel solutions. The ultra-low-noise PGIA accepts programmable gain settings so thermocouples, bridge sensors, and low-level analog signals with different amplitudes share the same hardware channel bank. Operating from a 2.375V to 5V supply at 13 mA, the device fits isolated front-end designs where power budgets are constrained. The SPI-compatible 3-wire interface isolates cleanly with standard digital isolators for ground-loop immunity. Channel scanning at up to 3.84 kSPS supports vibration, weight, and process monitoring within one module footprint.
推薦
Bridge Sensor and Load Cell Front Ends
Bridge-based sensors - load cells, strain gauges, and pressure transducers - produce full-scale outputs in the low millivolt range, demanding both gain and resolution from the digitizer. The CS5534-BSZ integrates an ultra-low-noise programmable gain instrumentation amplifier ahead of the 24-bit delta-sigma modulator, so the bridge output connects with minimal external circuitry and without the offset and drift penalties of a discrete amplifier chain. Differential inputs reject common-mode noise on long cable runs typical of industrial installations. Conversion timing can be aligned with power-line periods to null 50/60 Hz interference, a major error source for bridge systems. The 13 mA supply current and 2.375V to 5V operation suit both bench instruments and embedded sensing nodes.
推薦
推薦產品摘要
工程參考資料，適用於 CS5534-BSZ — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | CS5534-ASZ | CS5532-BSZ | CS5532-ASZ |
|---|---|---|---|---|
| Package | 24-SSOP | 24-SSOP (0.209 in, 5.30 mm) - same | 24-SSOP - same | 24-SSOP - same |
| Brand | Cirrus Logic | Cirrus Logic | Cirrus Logic | Cirrus Logic |
| Resolution | 24 bit | 24 bit | 24 bit | 24 bit |
| Input Channels | 4 differential | 4 differential | 2 differential | 2 differential |
| Integrated PGIA | Yes (ultra-low-noise) | Yes | Yes | Yes |
| Interface | 3-wire serial (SPI-compatible) | 3-wire serial | 3-wire serial | 3-wire serial |
主要差異化特點
- Four differential channels on one converter (對比CS5532-BSZ)
- Integrated ultra-low-noise PGIA (對比ADS124S08)
- Wide 2.375V-5V supply range (對比CS5530-ISZ)
設計說明
The CS5534-BSZ operates from 2.375V to 5V and draws about 13 mA. Because achieved resolution is dominated by supply and reference cleanliness rather than the converter itself, power the analog supply from a low-noise LDO (not a switching rail directly) and use a precision low-noise voltage reference. Decouple VA+ and VD close to the pins with 0.1 uF ceramics plus bulk 10 uF. Estimated: at 5 V and 13 mA the device dissipates only about 65 mW, so no thermal design effort is required for the 24-SSOP package.
Keep the differential input traces to the PGIA short, symmetrical, and guarded by ground to preserve the ultra-low-noise performance. Place an RC anti-alias filter ahead of the inputs; the 3.84 kSPS output rate still oversamples internally, but out-of-band interference can fold into the passband. Route the SPI 3-wire clock away from analog inputs, and synchronize conversion timing to the 50/60 Hz mains period to exploit the charge-balance architecture's line-noise rejection.
Substitution risk: modern 24-bit ADCs (ADS124S08, AD7124-8, MAX11254) are NOT drop-in replacements for the CS5534-BSZ despite better parametrics - pinout, package, and command protocol all differ, per cross-reference analysis. Stay within the CS5532/34 family (CS5534-ASZ, CS5532-BSZ) for same-footprint substitution. Also verify grade suffixes (AS vs BS, Z plating designation) against procurement documents, as distributor comparisons show these suffixes differ in plating/package description details.
合規資訊
Matte tin contact plating reported in distributor parametric data. RoHS/REACH status not explicitly stated in provided web data - verify on DigiKey/Mouser product pages.
